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<meta name="DC.Title" content="The Characteristics and Risk Factors of Headache Development after the Coil Embolization of an Unruptured Aneurysm" />
<meta name="DC.Identifier" content="10.3174/ajnr.A3018" />
<meta name="DC.Date" content="2012-10-01" />
<meta name="DC.Publisher" content="American Journal of Neuroradiology" />
<meta name="DC.Rights" content="© 2012 by American Journal of Neuroradiology. 
Indicates open access to non-subscribers at www.ajnr.org" />
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<meta name="DC.Description" content="BACKGROUND AND PURPOSE: Development of a headache after aneurysm coil embolization is not uncommon but has received little attention. The authors prospectively analyze the characteristics and risk factors of a headache after coiling in patients treated for an unruptured cerebral aneurysm.

MATERIALS AND METHODS: Ninety patients treated for an unruptured cerebral aneurysm over a period of 1 year, and without a headache history within a month before coiling, were enrolled in this study. All coilings were successfully performed without neurologic complications. After coiling, headache development and intensities were recorded.

RESULTS: Fifty (55.6%) patients experienced a headache (VAS score, 4.5 ± 2.02) at 7.9 (range, 0–72) hours, on average, after coiling, and all headaches resolved within an average of 73.0 (range, 3–312) hours. Univariate analysis showed that the following were significantly associated with the development of a headache: age ≤50 years (OR 4.636, 95% CI, 1.414–15.198), hypertension (OR 0.232, 95% CI, 0.095–0.571), a packing attenuation of &gt;25% (OR 3.619, 95% CI, 1.428–9.174), and a previous headache history (OR 2.769, 95% CI, 1.120–6.849). However, binary logistic regression showed that only a packing attenuation of &gt;25% ( P = .013, adjusted OR 3.774, 95% CI, 1.320–10.790) and no history of hypertension ( P = .019, adjusted OR 3.515, 95% CI, 1.233–10.021) were independently associated with the development of a headache.

CONCLUSIONS: A headache frequently developed after the coiling of unruptured aneurysms. However, headaches were relatively benign and resolved within several days. The present study shows that no hypertension history and a packing attenuation of &gt;25% are risk factors of headache development.

CI
:   confidence interval
NSAID
:   nonsteroidal anti-inflammatory drug
OR
:   odds ratio
VAS
:   Visual Analogue Scale" />
<meta name="DC.Contributor" content="G. Hwang" />
<meta name="DC.Contributor" content="E.-A. Jeong" />
<meta name="DC.Contributor" content="J.H. Sohn" />
<meta name="DC.Contributor" content="H. Park" />
<meta name="DC.Contributor" content="J.S. Bang" />
<meta name="DC.Contributor" content="S.-C. Jin" />
<meta name="DC.Contributor" content="B.C. Kim" />
<meta name="DC.Contributor" content="C.W. Oh" />
<meta name="DC.Contributor" content="O.-K. Kwon" />
<meta name="article:published_time" content="2012-10-01" />
<meta name="article:section" content="Interventional" />
<meta name="citation_title" content="The Characteristics and Risk Factors of Headache Development after the Coil Embolization of an Unruptured Aneurysm" />
<meta name="citation_abstract" lang="en" content="&lt;h3&gt;BACKGROUND AND PURPOSE:&lt;/h3&gt;
&lt;p&gt;Development of a headache after aneurysm coil embolization is not uncommon but has received little attention. The authors prospectively analyze the characteristics and risk factors of a headache after coiling in patients treated for an unruptured cerebral aneurysm.&lt;/p&gt;&lt;h3&gt;MATERIALS AND METHODS:&lt;/h3&gt;
&lt;p&gt;Ninety patients treated for an unruptured cerebral aneurysm over a period of 1 year, and without a headache history within a month before coiling, were enrolled in this study. All coilings were successfully performed without neurologic complications. After coiling, headache development and intensities were recorded.&lt;/p&gt;&lt;h3&gt;RESULTS:&lt;/h3&gt;
&lt;p&gt;Fifty (55.6%) patients experienced a headache (VAS score, 4.5 ± 2.02) at 7.9 (range, 0–72) hours, on average, after coiling, and all headaches resolved within an average of 73.0 (range, 3–312) hours. Univariate analysis showed that the following were significantly associated with the development of a headache: age ≤50 years (OR 4.636, 95% CI, 1.414–15.198), hypertension (OR 0.232, 95% CI, 0.095–0.571), a packing attenuation of &amp;gt;25% (OR 3.619, 95% CI, 1.428–9.174), and a previous headache history (OR 2.769, 95% CI, 1.120–6.849). However, binary logistic regression showed that only a packing attenuation of &amp;gt;25% (&lt;i&gt;P&lt;/i&gt; = .013, adjusted OR 3.774, 95% CI, 1.320–10.790) and no history of hypertension (&lt;i&gt;P&lt;/i&gt; = .019, adjusted OR 3.515, 95% CI, 1.233–10.021) were independently associated with the development of a headache.&lt;/p&gt;&lt;h3&gt;CONCLUSIONS:&lt;/h3&gt;
&lt;p&gt;A headache frequently developed after the coiling of unruptured aneurysms. However, headaches were relatively benign and resolved within several days. The present study shows that no hypertension history and a packing attenuation of &amp;gt;25% are risk factors of headache development.&lt;/p&gt;" />
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<meta name="twitter:title" content="The Characteristics and Risk Factors of Headache Development after the Coil Embolization of an Unruptured Aneurysm" />
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<meta name="twitter:description" content="BACKGROUND AND PURPOSE: Development of a headache after aneurysm coil embolization is not uncommon but has received little attention. The authors prospectively analyze the characteristics and risk factors of a headache after coiling in patients treated for an unruptured cerebral aneurysm.

MATERIALS AND METHODS: Ninety patients treated for an unruptured cerebral aneurysm over a period of 1 year, and without a headache history within a month before coiling, were enrolled in this study. All coilings were successfully performed without neurologic complications. After coiling, headache development and intensities were recorded.

RESULTS: Fifty (55.6%) patients experienced a headache (VAS score, 4.5 ± 2.02) at 7.9 (range, 0–72) hours, on average, after coiling, and all headaches resolved within an average of 73.0 (range, 3–312) hours. Univariate analysis showed that the following were significantly associated with the development of a headache: age ≤50 years (OR 4.636, 95% CI, 1.414–15.198), hypertension (OR 0.232, 95% CI, 0.095–0.571), a packing attenuation of &gt;25% (OR 3.619, 95% CI, 1.428–9.174), and a previous headache history (OR 2.769, 95% CI, 1.120–6.849). However, binary logistic regression showed that only a packing attenuation of &gt;25% ( P = .013, adjusted OR 3.774, 95% CI, 1.320–10.790) and no history of hypertension ( P = .019, adjusted OR 3.515, 95% CI, 1.233–10.021) were independently associated with the development of a headache.

CONCLUSIONS: A headache frequently developed after the coiling of unruptured aneurysms. However, headaches were relatively benign and resolved within several days. The present study shows that no hypertension history and a packing attenuation of &gt;25% are risk factors of headache development.

CI
:   confidence interval
NSAID
:   nonsteroidal anti-inflammatory drug
OR
:   odds ratio
VAS
:   Visual Analogue Scale" />
<meta name="og-title" property="og:title" content="The Characteristics and Risk Factors of Headache Development after the Coil Embolization of an Unruptured Aneurysm" />
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<meta name="og-description" property="og:description" content="BACKGROUND AND PURPOSE: Development of a headache after aneurysm coil embolization is not uncommon but has received little attention. The authors prospectively analyze the characteristics and risk factors of a headache after coiling in patients treated for an unruptured cerebral aneurysm.

MATERIALS AND METHODS: Ninety patients treated for an unruptured cerebral aneurysm over a period of 1 year, and without a headache history within a month before coiling, were enrolled in this study. All coilings were successfully performed without neurologic complications. After coiling, headache development and intensities were recorded.

RESULTS: Fifty (55.6%) patients experienced a headache (VAS score, 4.5 ± 2.02) at 7.9 (range, 0–72) hours, on average, after coiling, and all headaches resolved within an average of 73.0 (range, 3–312) hours. Univariate analysis showed that the following were significantly associated with the development of a headache: age ≤50 years (OR 4.636, 95% CI, 1.414–15.198), hypertension (OR 0.232, 95% CI, 0.095–0.571), a packing attenuation of &gt;25% (OR 3.619, 95% CI, 1.428–9.174), and a previous headache history (OR 2.769, 95% CI, 1.120–6.849). However, binary logistic regression showed that only a packing attenuation of &gt;25% ( P = .013, adjusted OR 3.774, 95% CI, 1.320–10.790) and no history of hypertension ( P = .019, adjusted OR 3.515, 95% CI, 1.233–10.021) were independently associated with the development of a headache.

CONCLUSIONS: A headache frequently developed after the coiling of unruptured aneurysms. However, headaches were relatively benign and resolved within several days. The present study shows that no hypertension history and a packing attenuation of &gt;25% are risk factors of headache development.

CI
:   confidence interval
NSAID
:   nonsteroidal anti-inflammatory drug
OR
:   odds ratio
VAS
:   Visual Analogue Scale" />
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    <div class="highwire-article-citation highwire-citation-type-highwire-article node12078" data-node-nid="12078" id="top-node-12078--2971701201" data-pisa="ajnr;33/9/1676" data-pisa-master="ajnr;ajnr.A3018" data-apath="/ajnr/33/9/1676.atom" data-hw-author-tooltip-instance="highwire_author_tooltip"><div class="highwire-cite highwire-cite-highwire-article highwire-citation-jcore-article-title-complete clearfix has-author-tooltip highwire-citation-highwire-article-top-a">
  
  
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      <h1 class="highwire-cite-title" id="page-title">The Characteristics and Risk Factors of Headache Development after the Coil Embolization of an Unruptured Aneurysm</h1>  
    	<div class="highwire-cite-authors"><span  class="highwire-citation-authors"><span class="highwire-citation-author first" data-delta="0">G. Hwang</span>, <span class="highwire-citation-author" data-delta="1">E.-A. Jeong</span>, <span class="highwire-citation-author" data-delta="2">J.H. Sohn</span>, <span class="highwire-citation-author" data-delta="3">H. Park</span>, <span class="highwire-citation-author" data-delta="4">J.S. Bang</span>, <span class="highwire-citation-author" data-delta="5">S.-C. Jin</span>, <span class="highwire-citation-author" data-delta="6">B.C. Kim</span>, <span class="highwire-citation-author" data-delta="7">C.W. Oh</span> and <span class="highwire-citation-author" data-delta="8">O.-K. Kwon</span></span></div>
  
    	<div class="highwire-cite-metadata"><span  class="highwire-cite-metadata-journal highwire-cite-metadata">American Journal of Neuroradiology </span><span  class="highwire-cite-metadata-date highwire-cite-metadata">October 2012,  </span><span  class="highwire-cite-metadata-volume highwire-cite-metadata">33 </span><span  class="highwire-cite-metadata-issue highwire-cite-metadata">(9) </span><span  class="highwire-cite-metadata-pages highwire-cite-metadata">1676-1678; </span><span  class="highwire-cite-metadata-doi highwire-cite-metadata">DOI: https://doi.org/10.3174/ajnr.A3018 </span></div>
  
  
  
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<div id="hw-article-author-popups-top-node-12078--2971701201" style="display: none;"><div class="author-tooltip-0"><div class="author-tooltip-name">G. Hwang </div><div class="author-tooltip-affiliation"><span class="author-tooltip-text"><div class='author-affiliation'><span class='nlm-sup'>a</span>From the Department of Neurosurgery (G.H., E.-A.J., J.S.B., C.W.O., O.-K.K.), Seoul National University Bundang Hospital, Seongnam, Korea</div></span></div><ul class="author-tooltip-find-more"><li class="author-tooltip-gs-link first"><a href="/lookup/google-scholar?link_type=googlescholar&amp;gs_type=author&amp;author%5B0%5D=G.%2BHwang%2B" target="_blank" class="" data-icon-position="" data-hide-link-title="0">Find this author on Google Scholar</a></li><li class="author-tooltip-pubmed-link"><a href="/lookup/external-ref?access_num=Hwang%20G&amp;link_type=AUTHORSEARCH" target="_blank" class="" data-icon-position="" data-hide-link-title="0">Find this author on PubMed</a></li><li class="author-site-search-link last"><a href="/search/author1%3AG.%2BHwang%2B" rel="nofollow" class="" data-icon-position="" data-hide-link-title="0">Search for this author on this site</a></li></ul></div><div class="author-tooltip-1"><div class="author-tooltip-name">E.-A. Jeong </div><div class="author-tooltip-affiliation"><span class="author-tooltip-text"><div class='author-affiliation'><span class='nlm-sup'>a</span>From the Department of Neurosurgery (G.H., E.-A.J., J.S.B., C.W.O., O.-K.K.), Seoul National University Bundang Hospital, Seongnam, Korea</div></span></div><ul class="author-tooltip-find-more"><li class="author-tooltip-gs-link first"><a href="/lookup/google-scholar?link_type=googlescholar&amp;gs_type=author&amp;author%5B0%5D=E.-A.%2BJeong%2B" target="_blank" class="" data-icon-position="" data-hide-link-title="0">Find this author on Google Scholar</a></li><li class="author-tooltip-pubmed-link"><a href="/lookup/external-ref?access_num=Jeong%20E&amp;link_type=AUTHORSEARCH" target="_blank" class="" data-icon-position="" data-hide-link-title="0">Find this author on PubMed</a></li><li class="author-site-search-link last"><a href="/search/author1%3AE.-A.%2BJeong%2B" rel="nofollow" class="" data-icon-position="" data-hide-link-title="0">Search for this author on this site</a></li></ul></div><div class="author-tooltip-2"><div class="author-tooltip-name">J.H. Sohn </div><div class="author-tooltip-affiliation"><span class="author-tooltip-text"><div class='author-affiliation'><span class='nlm-sup'>b</span>Department of Neurology (J.H.S.), Chuncheon Sacred Heart Hospital, Hallym University, Chuncheon, Korea</div></span></div><ul class="author-tooltip-find-more"><li class="author-tooltip-gs-link first"><a href="/lookup/google-scholar?link_type=googlescholar&amp;gs_type=author&amp;author%5B0%5D=J.H.%2BSohn%2B" target="_blank" class="" data-icon-position="" data-hide-link-title="0">Find this author on Google Scholar</a></li><li class="author-tooltip-pubmed-link"><a href="/lookup/external-ref?access_num=Sohn%20J&amp;link_type=AUTHORSEARCH" target="_blank" class="" data-icon-position="" data-hide-link-title="0">Find this author on PubMed</a></li><li class="author-site-search-link last"><a href="/search/author1%3AJ.H.%2BSohn%2B" rel="nofollow" class="" data-icon-position="" data-hide-link-title="0">Search for this author on this site</a></li></ul></div><div class="author-tooltip-3"><div class="author-tooltip-name">H. Park </div><div class="author-tooltip-affiliation"><span class="author-tooltip-text"><div class='author-affiliation'><span class='nlm-sup'>c</span>Department of Neurosurgery (H.P.), Jeju National University Hospital, Jeju, Korea</div></span></div><ul class="author-tooltip-find-more"><li class="author-tooltip-gs-link first"><a href="/lookup/google-scholar?link_type=googlescholar&amp;gs_type=author&amp;author%5B0%5D=H.%2BPark%2B" target="_blank" class="" data-icon-position="" data-hide-link-title="0">Find this author on Google Scholar</a></li><li class="author-tooltip-pubmed-link"><a href="/lookup/external-ref?access_num=Park%20H&amp;link_type=AUTHORSEARCH" target="_blank" class="" data-icon-position="" data-hide-link-title="0">Find this author on PubMed</a></li><li class="author-site-search-link last"><a href="/search/author1%3AH.%2BPark%2B" rel="nofollow" class="" data-icon-position="" data-hide-link-title="0">Search for this author on this site</a></li></ul></div><div class="author-tooltip-4"><div class="author-tooltip-name">J.S. Bang </div><div class="author-tooltip-affiliation"><span class="author-tooltip-text"><div class='author-affiliation'><span class='nlm-sup'>a</span>From the Department of Neurosurgery (G.H., E.-A.J., J.S.B., C.W.O., O.-K.K.), Seoul National University Bundang Hospital, Seongnam, Korea</div></span></div><ul class="author-tooltip-find-more"><li class="author-tooltip-gs-link first"><a href="/lookup/google-scholar?link_type=googlescholar&amp;gs_type=author&amp;author%5B0%5D=J.S.%2BBang%2B" target="_blank" class="" data-icon-position="" data-hide-link-title="0">Find this author on Google Scholar</a></li><li class="author-tooltip-pubmed-link"><a href="/lookup/external-ref?access_num=Bang%20J&amp;link_type=AUTHORSEARCH" target="_blank" class="" data-icon-position="" data-hide-link-title="0">Find this author on PubMed</a></li><li class="author-site-search-link last"><a href="/search/author1%3AJ.S.%2BBang%2B" rel="nofollow" class="" data-icon-position="" data-hide-link-title="0">Search for this author on this site</a></li></ul></div><div class="author-tooltip-5"><div class="author-tooltip-name">S.-C. Jin </div><div class="author-tooltip-affiliation"><span class="author-tooltip-text"><div class='author-affiliation'><span class='nlm-sup'>d</span>Department of Neurosurgery (S.-C.J.), Haeundae Paik Hospital, Inje University, Busan, Korea</div></span></div><ul class="author-tooltip-find-more"><li class="author-tooltip-gs-link first"><a href="/lookup/google-scholar?link_type=googlescholar&amp;gs_type=author&amp;author%5B0%5D=S.-C.%2BJin%2B" target="_blank" class="" data-icon-position="" data-hide-link-title="0">Find this author on Google Scholar</a></li><li class="author-tooltip-pubmed-link"><a href="/lookup/external-ref?access_num=Jin%20S&amp;link_type=AUTHORSEARCH" target="_blank" class="" data-icon-position="" data-hide-link-title="0">Find this author on PubMed</a></li><li class="author-site-search-link last"><a href="/search/author1%3AS.-C.%2BJin%2B" rel="nofollow" class="" data-icon-position="" data-hide-link-title="0">Search for this author on this site</a></li></ul></div><div class="author-tooltip-6"><div class="author-tooltip-name">B.C. Kim </div><div class="author-tooltip-affiliation"><span class="author-tooltip-text"><div class='author-affiliation'><span class='nlm-sup'>e</span>Department of Neurosurgery (B.C.K.), Dongguk University Ilsan Hospital, Goyang, Korea.</div></span></div><ul class="author-tooltip-find-more"><li class="author-tooltip-gs-link first"><a href="/lookup/google-scholar?link_type=googlescholar&amp;gs_type=author&amp;author%5B0%5D=B.C.%2BKim%2B" target="_blank" class="" data-icon-position="" data-hide-link-title="0">Find this author on Google Scholar</a></li><li class="author-tooltip-pubmed-link"><a href="/lookup/external-ref?access_num=Kim%20B&amp;link_type=AUTHORSEARCH" target="_blank" class="" data-icon-position="" data-hide-link-title="0">Find this author on PubMed</a></li><li class="author-site-search-link last"><a href="/search/author1%3AB.C.%2BKim%2B" rel="nofollow" class="" data-icon-position="" data-hide-link-title="0">Search for this author on this site</a></li></ul></div><div class="author-tooltip-7"><div class="author-tooltip-name">C.W. Oh </div><div class="author-tooltip-affiliation"><span class="author-tooltip-text"><div class='author-affiliation'><span class='nlm-sup'>a</span>From the Department of Neurosurgery (G.H., E.-A.J., J.S.B., C.W.O., O.-K.K.), Seoul National University Bundang Hospital, Seongnam, Korea</div></span></div><ul class="author-tooltip-find-more"><li class="author-tooltip-gs-link first"><a href="/lookup/google-scholar?link_type=googlescholar&amp;gs_type=author&amp;author%5B0%5D=C.W.%2BOh%2B" target="_blank" class="" data-icon-position="" data-hide-link-title="0">Find this author on Google Scholar</a></li><li class="author-tooltip-pubmed-link"><a href="/lookup/external-ref?access_num=Oh%20C&amp;link_type=AUTHORSEARCH" target="_blank" class="" data-icon-position="" data-hide-link-title="0">Find this author on PubMed</a></li><li class="author-site-search-link last"><a href="/search/author1%3AC.W.%2BOh%2B" rel="nofollow" class="" data-icon-position="" data-hide-link-title="0">Search for this author on this site</a></li></ul></div><div class="author-tooltip-8"><div class="author-tooltip-name">O.-K. 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    <div class="highwire-markup"><div xmlns="http://www.w3.org/1999/xhtml" xmlns:xhtml="http://www.w3.org/1999/xhtml" class="section ref-list" id="ref-list-1"><h2>References</h2><ol class="cit-list ref-use-labels"><li><span class="ref-label">1.</span><a class="rev-xref-ref" href="#xref-ref-1-1" title="View reference 1. in text" id="ref-1">↵</a>

<div class="cit ref-cit ref-journal" id="cit-33.9.1676.1" data-doi="10.1227/01.NEU.0000374770.09140.FB"><div class="cit-metadata"><ol class="cit-auth-list"><li><span class="cit-auth"><span class="cit-name-surname">Hwang</span>  <span class="cit-name-given-names">G</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Jung</span>  <span class="cit-name-given-names">C</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Park</span>  <span class="cit-name-given-names">SQ</span></span>, </li><li><span class="cit-etal">et al</span></li></ol><cite>.
<span class="cit-article-title">Thromboembolic complications of elective coil embolization of unruptured aneurysms: the effect of oral antiplatelet preparation on periprocedural thromboembolic complication</span>.
<abbr class="cit-jnl-abbrev">Neurosurgery</abbr>
<span class="cit-pub-date">2010</span>;
<span class="cit-vol">67</span>:
<span class="cit-fpage">743</span>–
<span class="cit-lpage">48</span>;
<span class="cit-comment">discussion 748</span></cite></div><div class="cit-extra"><a href="/lookup/external-ref?access_num=10.1227/01.NEU.0000374770.09140.FB&amp;link_type=DOI" class="cit-ref-sprinkles cit-ref-sprinkles-doi cit-ref-sprinkles-crossref"><span>CrossRef</span></a><a href="/lookup/external-ref?access_num=20651627&amp;link_type=MED&amp;atom=%2Fajnr%2F33%2F9%2F1676.atom" class="cit-ref-sprinkles cit-ref-sprinkles-medline"><span>PubMed</span></a><a href="/lookup/external-ref?access_num=000281153200023&amp;link_type=ISI" class="cit-ref-sprinkles cit-ref-sprinkles-newisilink cit-ref-sprinkles-webofscience"><span>Web of Science</span></a></div></div></li><li><span class="ref-label">2.</span><a class="rev-xref-ref" href="#xref-ref-2-1" title="View reference 2. in text" id="ref-2">↵</a>

<div class="cit ref-cit ref-journal" id="cit-33.9.1676.2" data-doi="10.3174/ajnr.A2203"><div class="cit-metadata"><ol class="cit-auth-list"><li><span class="cit-auth"><span class="cit-name-surname">Hwang</span>  <span class="cit-name-given-names">G</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Jung</span>  <span class="cit-name-given-names">C</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Sheen</span>  <span class="cit-name-given-names">SH</span></span>, </li><li><span class="cit-etal">et al</span></li></ol><cite>.
<span class="cit-article-title">Two-year follow-up of contrast stasis within the sac in unruptured aneurysm coil embolization: progressive thrombosis or enlargement?</span>
<abbr class="cit-jnl-abbrev">AJNR Am J Neuroradiol</abbr>
<span class="cit-pub-date">2010</span>;
<span class="cit-vol">31</span>:
<span class="cit-fpage">1929</span>–
<span class="cit-lpage">34</span></cite></div><div class="cit-extra"><a href="/lookup/ijlink/YTozOntzOjQ6InBhdGgiO3M6MTQ6Ii9sb29rdXAvaWpsaW5rIjtzOjU6InF1ZXJ5IjthOjQ6e3M6ODoibGlua1R5cGUiO3M6NDoiQUJTVCI7czoxMToiam91cm5hbENvZGUiO3M6NDoiYWpuciI7czo1OiJyZXNpZCI7czoxMDoiMzEvMTAvMTkyOSI7czo0OiJhdG9tIjtzOjIwOiIvYWpuci8zMy85LzE2NzYuYXRvbSI7fXM6ODoiZnJhZ21lbnQiO3M6MDoiIjt9" class="cit-ref-sprinkles cit-ref-sprinkles-ijlink"><span><span class="cit-reflinks-abstract">Abstract</span><span class="cit-sep cit-reflinks-variant-name-sep">/</span><span class="cit-reflinks-full-text"><span class="free-full-text">FREE </span>Full Text</span></span></a></div></div></li><li><span class="ref-label">3.</span><a class="rev-xref-ref" href="#xref-ref-3-1" title="View reference 3. in text" id="ref-3">↵</a>

<div class="cit ref-cit ref-journal" id="cit-33.9.1676.3" data-doi="10.3174/ajnr.A1290"><div class="cit-metadata"><ol class="cit-auth-list"><li><span class="cit-auth"><span class="cit-name-surname">Im</span>  <span class="cit-name-given-names">SH</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Han</span>  <span class="cit-name-given-names">MH</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Kwon</span>  <span class="cit-name-given-names">OK</span></span>, </li><li><span class="cit-etal">et al</span></li></ol><cite>.
<span class="cit-article-title">Endovascular coil embolization of 435 small asymptomatic unruptured intracranial aneurysms: procedural morbidity and patient outcome</span>.
<abbr class="cit-jnl-abbrev">AJNR Am J Neuroradiol</abbr>
<span class="cit-pub-date">2009</span>;
<span class="cit-vol">30</span>:
<span class="cit-fpage">79</span>–
<span class="cit-lpage">84</span></cite></div><div class="cit-extra"><a href="/lookup/ijlink/YTozOntzOjQ6InBhdGgiO3M6MTQ6Ii9sb29rdXAvaWpsaW5rIjtzOjU6InF1ZXJ5IjthOjQ6e3M6ODoibGlua1R5cGUiO3M6NDoiQUJTVCI7czoxMToiam91cm5hbENvZGUiO3M6NDoiYWpuciI7czo1OiJyZXNpZCI7czo3OiIzMC8xLzc5IjtzOjQ6ImF0b20iO3M6MjA6Ii9ham5yLzMzLzkvMTY3Ni5hdG9tIjt9czo4OiJmcmFnbWVudCI7czowOiIiO30=" class="cit-ref-sprinkles cit-ref-sprinkles-ijlink"><span><span class="cit-reflinks-abstract">Abstract</span><span class="cit-sep cit-reflinks-variant-name-sep">/</span><span class="cit-reflinks-full-text"><span class="free-full-text">FREE </span>Full Text</span></span></a></div></div></li><li><span class="ref-label">4.</span><a class="rev-xref-ref" href="#xref-ref-4-1" title="View reference 4. in text" id="ref-4">↵</a>

<div class="cit ref-cit ref-journal" id="cit-33.9.1676.4"><div class="cit-metadata"><ol class="cit-auth-list"><li><span class="cit-auth"><span class="cit-name-surname">Kwon</span>  <span class="cit-name-given-names">OK</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Kim</span>  <span class="cit-name-given-names">SH</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Kwon</span>  <span class="cit-name-given-names">BJ</span></span>, </li><li><span class="cit-etal">et al</span></li></ol><cite>.
<span class="cit-article-title">Endovascular treatment of wide-necked aneurysms by using two microcatheters: techniques and outcomes in 25 patients</span>.
<abbr class="cit-jnl-abbrev">AJNR Am J Neuroradiol</abbr>
<span class="cit-pub-date">2005</span>;
<span class="cit-vol">26</span>:
<span class="cit-fpage">894</span>–
<span class="cit-lpage">900</span></cite></div><div class="cit-extra"><a href="/lookup/ijlink/YTozOntzOjQ6InBhdGgiO3M6MTQ6Ii9sb29rdXAvaWpsaW5rIjtzOjU6InF1ZXJ5IjthOjQ6e3M6ODoibGlua1R5cGUiO3M6NDoiQUJTVCI7czoxMToiam91cm5hbENvZGUiO3M6NDoiYWpuciI7czo1OiJyZXNpZCI7czo4OiIyNi80Lzg5NCI7czo0OiJhdG9tIjtzOjIwOiIvYWpuci8zMy85LzE2NzYuYXRvbSI7fXM6ODoiZnJhZ21lbnQiO3M6MDoiIjt9" class="cit-ref-sprinkles cit-ref-sprinkles-ijlink"><span><span class="cit-reflinks-abstract">Abstract</span><span class="cit-sep cit-reflinks-variant-name-sep">/</span><span class="cit-reflinks-full-text"><span class="free-full-text">FREE </span>Full Text</span></span></a></div></div></li><li><span class="ref-label">5.</span><a class="rev-xref-ref" href="#xref-ref-5-1" title="View reference 5. in text" id="ref-5">↵</a>

<div class="cit ref-cit ref-journal" id="cit-33.9.1676.5" data-doi="10.1111/j.1468-2982.2003.00824.x"><div class="cit-metadata"><cite><span class="cit-article-title">Headache Classification Subcommitee of the International Headache Society. The International Classification of Headache Disorders (2nd ed.)</span>.
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<span class="cit-pub-date">2004</span>;
<span class="cit-vol">24</span>:
<span class="cit-fpage">9</span>–
<span class="cit-lpage">160</span></cite></div><div class="cit-extra"><a href="/lookup/ijlink/YTozOntzOjQ6InBhdGgiO3M6MTQ6Ii9sb29rdXAvaWpsaW5rIjtzOjU6InF1ZXJ5IjthOjQ6e3M6ODoibGlua1R5cGUiO3M6NDoiRlVMTCI7czoxMToiam91cm5hbENvZGUiO3M6NToic3BjZXAiO3M6NToicmVzaWQiO3M6MTI6IjI0LzFfc3VwcGwvOSI7czo0OiJhdG9tIjtzOjIwOiIvYWpuci8zMy85LzE2NzYuYXRvbSI7fXM6ODoiZnJhZ21lbnQiO3M6MDoiIjt9" class="cit-ref-sprinkles cit-ref-sprinkles-ijlink"><span><span class="cit-reflinks-full-text"><span class="free-full-text">FREE </span>Full Text</span></span></a></div></div></li><li><span class="ref-label">6.</span><a class="rev-xref-ref" href="#xref-ref-6-1" title="View reference 6. in text" id="ref-6">↵</a>

<div class="cit ref-cit ref-journal" id="cit-33.9.1676.6" data-doi="10.1111/j.1468-1331.2006.01411.x"><div class="cit-metadata"><ol class="cit-auth-list"><li><span class="cit-auth"><span class="cit-name-surname">Evers</span>  <span class="cit-name-given-names">S</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Afra</span>  <span class="cit-name-given-names">J</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Frese</span>  <span class="cit-name-given-names">A</span></span>, </li><li><span class="cit-etal">et al</span></li></ol><cite>.
<span class="cit-article-title">EFNS guideline on the drug treatment of migraine—report of an EFNS task force</span>.
<abbr class="cit-jnl-abbrev">Eur Journal Neurol</abbr>
<span class="cit-pub-date">2006</span>;
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<span class="cit-lpage">72</span></cite></div><div class="cit-extra"><a href="/lookup/external-ref?access_num=10.1111/j.1468-1331.2006.01411.x&amp;link_type=DOI" class="cit-ref-sprinkles cit-ref-sprinkles-doi cit-ref-sprinkles-crossref"><span>CrossRef</span></a></div></div></li><li><span class="ref-label">7.</span><a class="rev-xref-ref" href="#xref-ref-7-1" title="View reference 7. in text" id="ref-7">↵</a>

<div class="cit ref-cit ref-journal" id="cit-33.9.1676.7" data-doi="10.1111/j.1552-6569.2006.00043.x"><div class="cit-metadata"><ol class="cit-auth-list"><li><span class="cit-auth"><span class="cit-name-surname">Abou-Chebl</span>  <span class="cit-name-given-names">A</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Krieger</span>  <span class="cit-name-given-names">DW</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Bajzer</span>  <span class="cit-name-given-names">CT</span></span>, </li><li><span class="cit-etal">et al</span></li></ol><cite>.
<span class="cit-article-title">Intracranial angioplasty and stenting in the awake patient</span>.
<abbr class="cit-jnl-abbrev">J Neuroimaging</abbr>
<span class="cit-pub-date">2006</span>;
<span class="cit-vol">16</span>:
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<span class="cit-lpage">23</span></cite></div><div class="cit-extra"><a href="/lookup/external-ref?access_num=10.1111/j.1552-6569.2006.00043.x&amp;link_type=DOI" class="cit-ref-sprinkles cit-ref-sprinkles-doi cit-ref-sprinkles-crossref"><span>CrossRef</span></a><a href="/lookup/external-ref?access_num=16808823&amp;link_type=MED&amp;atom=%2Fajnr%2F33%2F9%2F1676.atom" class="cit-ref-sprinkles cit-ref-sprinkles-medline"><span>PubMed</span></a><a href="/lookup/external-ref?access_num=000238619700005&amp;link_type=ISI" class="cit-ref-sprinkles cit-ref-sprinkles-newisilink cit-ref-sprinkles-webofscience"><span>Web of Science</span></a></div></div></li><li><span class="ref-label">8.</span><a class="rev-xref-ref" href="#xref-ref-8-1" title="View reference 8. in text" id="ref-8">↵</a>

<div class="cit ref-cit ref-journal" id="cit-33.9.1676.8" data-doi="10.1046/j.1526-4610.2001.111006410.x"><div class="cit-metadata"><ol class="cit-auth-list"><li><span class="cit-auth"><span class="cit-name-surname">Beekman</span>  <span class="cit-name-given-names">R</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Nijssen</span>  <span class="cit-name-given-names">PC</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">van Rooij</span>  <span class="cit-name-given-names">WJ</span></span>, </li><li><span class="cit-etal">et al</span></li></ol><cite>.
<span class="cit-article-title">Migraine with aura after intracranial endovascular procedures</span>.
<abbr class="cit-jnl-abbrev">Headache</abbr>
<span class="cit-pub-date">2001</span>;
<span class="cit-vol">41</span>:
<span class="cit-fpage">410</span>–
<span class="cit-lpage">13</span></cite></div><div class="cit-extra"><a href="/lookup/external-ref?access_num=10.1046/j.1526-4610.2001.111006410.x&amp;link_type=DOI" class="cit-ref-sprinkles cit-ref-sprinkles-doi cit-ref-sprinkles-crossref"><span>CrossRef</span></a><a href="/lookup/external-ref?access_num=11318889&amp;link_type=MED&amp;atom=%2Fajnr%2F33%2F9%2F1676.atom" class="cit-ref-sprinkles cit-ref-sprinkles-medline"><span>PubMed</span></a><a href="/lookup/external-ref?access_num=000168173900010&amp;link_type=ISI" class="cit-ref-sprinkles cit-ref-sprinkles-newisilink cit-ref-sprinkles-webofscience"><span>Web of Science</span></a></div></div></li><li><span class="ref-label">9.</span><a class="rev-xref-ref" href="#xref-ref-9-1" title="View reference 9. in text" id="ref-9">↵</a>

<div class="cit ref-cit ref-journal" id="cit-33.9.1676.9" data-doi="10.1007/s10194-008-0057-3"><div class="cit-metadata"><ol class="cit-auth-list"><li><span class="cit-auth"><span class="cit-name-surname">Gil-Gouveia</span>  <span class="cit-name-given-names">RS</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Sousa</span>  <span class="cit-name-given-names">RF</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Lopes</span>  <span class="cit-name-given-names">L</span></span>, </li><li><span class="cit-etal">et al</span></li></ol><cite>.
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<abbr class="cit-jnl-abbrev">J Headache Pain</abbr>
<span class="cit-pub-date">2008</span>;
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<span class="cit-fpage">327</span>–
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<div class="cit ref-cit ref-journal" id="cit-33.9.1676.10" data-doi="10.1001/archneurpsyc.1938.02270040093005"><div class="cit-metadata"><ol class="cit-auth-list"><li><span class="cit-auth"><span class="cit-name-surname">Graham</span>  <span class="cit-name-given-names">JR</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Wolff</span>  <span class="cit-name-given-names">HG</span></span></li></ol><cite>.
<span class="cit-article-title">Mechanism of migraine headache and action of ergotamine tartrate</span>.
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<span class="cit-lpage">63</span></cite></div><div class="cit-extra"><a href="/lookup/external-ref?access_num=10.1001/archneurpsyc.1938.02270040093005&amp;link_type=DOI" class="cit-ref-sprinkles cit-ref-sprinkles-doi cit-ref-sprinkles-crossref"><span>CrossRef</span></a></div></div></li><li><span class="ref-label">11.</span><a class="rev-xref-ref" href="#xref-ref-11-1" title="View reference 11. in text" id="ref-11">↵</a>

<div class="cit ref-cit ref-journal" id="cit-33.9.1676.11" data-doi="10.1016/0140-6736(90)92339-J"><div class="cit-metadata"><ol class="cit-auth-list"><li><span class="cit-auth"><span class="cit-name-surname">Iversen</span>  <span class="cit-name-given-names">HK</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Nielsen</span>  <span class="cit-name-given-names">TH</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Olesen</span>  <span class="cit-name-given-names">J</span></span>, </li><li><span class="cit-etal">et al</span></li></ol><cite>.
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<div class="cit ref-cit ref-journal" id="cit-33.9.1676.26" data-doi="10.1016/0304-3959(86)90228-9"><div class="cit-metadata"><ol class="cit-auth-list"><li><span class="cit-auth"><span class="cit-name-surname">Jensen</span>  <span class="cit-name-given-names">MP</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Karoly</span>  <span class="cit-name-given-names">P</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Braver</span>  <span class="cit-name-given-names">S</span></span></li></ol><cite>.
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<div class="cit ref-cit ref-journal" id="cit-33.9.1676.27" data-doi="10.1016/0304-3959(81)90199-8"><div class="cit-metadata"><ol class="cit-auth-list"><li><span class="cit-auth"><span class="cit-name-surname">Kremer</span>  <span class="cit-name-given-names">E</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Atkinson</span>  <span class="cit-name-given-names">JH</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Ignelzi</span>  <span class="cit-name-given-names">RJ</span></span></li></ol><cite>.
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        	<div class="highwire-cite-metadata"><span  class="highwire-cite-metadata-volume highwire-cite-metadata">Vol. 33</span>, <span  class="highwire-cite-metadata-issue highwire-cite-metadata">Issue 9 </span><div  class="highwire-cite-metadata-pubdate highwire-cite-metadata">1 Oct 2012 </div></div>
      
      
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      <div class="highwire-cite-title">The Characteristics and Risk Factors of Headache Development after the Coil Embolization of an Unruptured Aneurysm</div>  
    	<div class="highwire-cite-authors"><span  class="highwire-citation-authors"><span class="highwire-citation-author first" data-delta="0"><span class="nlm-given-names">G.</span> <span class="nlm-surname">Hwang</span></span>, <span class="highwire-citation-author" data-delta="1"><span class="nlm-given-names">E.-A.</span> <span class="nlm-surname">Jeong</span></span>, <span class="highwire-citation-author" data-delta="2"><span class="nlm-given-names">J.H.</span> <span class="nlm-surname">Sohn</span></span>, <span class="highwire-citation-author" data-delta="3"><span class="nlm-given-names">H.</span> <span class="nlm-surname">Park</span></span>, <span class="highwire-citation-author" data-delta="4"><span class="nlm-given-names">J.S.</span> <span class="nlm-surname">Bang</span></span>, <span class="highwire-citation-author" data-delta="5"><span class="nlm-given-names">S.-C.</span> <span class="nlm-surname">Jin</span></span>, <span class="highwire-citation-author" data-delta="6"><span class="nlm-given-names">B.C.</span> <span class="nlm-surname">Kim</span></span>, <span class="highwire-citation-author" data-delta="7"><span class="nlm-given-names">C.W.</span> <span class="nlm-surname">Oh</span></span>, <span class="highwire-citation-author" data-delta="8"><span class="nlm-given-names">O.-K.</span> <span class="nlm-surname">Kwon</span></span></span></div>
  
    	<div class="highwire-cite-metadata"><span  class="highwire-cite-metadata-oa-ind highwire-cite-metadata"><i class="highwire-oa-indicator"></i> </span><span  class="highwire-cite-metadata-journal highwire-cite-metadata">American Journal of Neuroradiology </span><span  class="highwire-cite-metadata-date highwire-cite-metadata">Oct 2012, </span><span  class="highwire-cite-metadata-volume highwire-cite-metadata">33 </span><span  class="highwire-cite-metadata-issue highwire-cite-metadata">(9) </span><span  class="highwire-cite-metadata-pages highwire-cite-metadata">1676-1678; </span><span  class="highwire-cite-metadata-doi highwire-cite-metadata"><span class="label">DOI:</span> 10.3174/ajnr.A3018 </span></div>
  
  
  
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      <div class="highwire-cite-title">The Characteristics and Risk Factors of Headache Development after the Coil Embolization of an Unruptured Aneurysm</div>  
    	<div class="highwire-cite-authors"><span  class="highwire-citation-authors"><span class="highwire-citation-author first" data-delta="0"><span class="nlm-given-names">G.</span> <span class="nlm-surname">Hwang</span></span>, <span class="highwire-citation-author" data-delta="1"><span class="nlm-given-names">E.-A.</span> <span class="nlm-surname">Jeong</span></span>, <span class="highwire-citation-author" data-delta="2"><span class="nlm-given-names">J.H.</span> <span class="nlm-surname">Sohn</span></span>, <span class="highwire-citation-author" data-delta="3"><span class="nlm-given-names">H.</span> <span class="nlm-surname">Park</span></span>, <span class="highwire-citation-author" data-delta="4"><span class="nlm-given-names">J.S.</span> <span class="nlm-surname">Bang</span></span>, <span class="highwire-citation-author" data-delta="5"><span class="nlm-given-names">S.-C.</span> <span class="nlm-surname">Jin</span></span>, <span class="highwire-citation-author" data-delta="6"><span class="nlm-given-names">B.C.</span> <span class="nlm-surname">Kim</span></span>, <span class="highwire-citation-author" data-delta="7"><span class="nlm-given-names">C.W.</span> <span class="nlm-surname">Oh</span></span>, <span class="highwire-citation-author" data-delta="8"><span class="nlm-given-names">O.-K.</span> <span class="nlm-surname">Kwon</span></span></span></div>
  
    	<div class="highwire-cite-metadata"><span  class="highwire-cite-metadata-oa-ind highwire-cite-metadata"><i class="highwire-oa-indicator"></i> </span><span  class="highwire-cite-metadata-journal highwire-cite-metadata">American Journal of Neuroradiology </span><span  class="highwire-cite-metadata-date highwire-cite-metadata">Oct 2012, </span><span  class="highwire-cite-metadata-volume highwire-cite-metadata">33 </span><span  class="highwire-cite-metadata-issue highwire-cite-metadata">(9) </span><span  class="highwire-cite-metadata-pages highwire-cite-metadata">1676-1678; </span><span  class="highwire-cite-metadata-doi highwire-cite-metadata"><span class="label">DOI:</span> 10.3174/ajnr.A3018 </span></div>
  
  
  
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