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Fig. 1B. —Balloon-occluded retrograde transvenous sclerosis. Drawing shows that coaxial microcatheter (short arrow) is selectively inserted into gastric varices through inflated balloon catheter (long arrow) in balloon-occluded retrograde transvenous sclerosis. Sclerosant is then directly injected into gastric varices (shaded area). Forty minutes after injection of sclerosant, as much of residual sclerosant as possible is withdrawn. IVC = inferior vena cava.