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Table: Risk-reduction strategies for endovascular treatment of falcotentorial dural AVFs
Category Risk-Reduction Strategy Patients Treated
Anatomic assessment; to identify supply from ADS Magnified high-frame-rate angiography 1–6
3D rotational angiography with multiplanar reconstructions 1–6
Transarterial embolization; strategies to avoid reflux across ADS Initial embolization from non-ADS arterial supplies (to reduce competitive flow) 1–6
Close monitoring for linear reflux anteriorly from the vein of Galen (along the expected course of ADS) 1–6
Embolization directly via ADS; strategies to treat via ADS while avoiding reflux Direct cannulation of ADS with embolization if distal access achieved (pressure-cooker technique to minimize reflux) 2
Aborting embolization attempts from ADS if distal access not achieved (insufficient safety margin) 1
Strategies for residual ADS supply Staged embolization over multiple sessions as required 1, 3, 5
Transvenous approach (eg, reverse pressure-cooker technique) 1

Category	Risk-Reduction Strategy	Patients Treated
Anatomic assessment; to identify supply from ADS	Magnified high-frame-rate angiography	1–6
Anatomic assessment; to identify supply from ADS	3D rotational angiography with multiplanar reconstructions	1–6
Transarterial embolization; strategies to avoid reflux across ADS	Initial embolization from non-ADS arterial supplies (to reduce competitive flow)	1–6
	Close monitoring for linear reflux anteriorly from the vein of Galen (along the expected course of ADS)	1–6
Embolization directly via ADS; strategies to treat via ADS while avoiding reflux	Direct cannulation of ADS with embolization if distal access achieved (pressure-cooker technique to minimize reflux)	2
	Aborting embolization attempts from ADS if distal access not achieved (insufficient safety margin)	1
Strategies for residual ADS supply	Staged embolization over multiple sessions as required	1, 3, 5
	Transvenous approach (eg, reverse pressure-cooker technique)	1