Figure 1From: The Anticoagulation of Calf Thrombosis (ACT) project: study protocol for a randomized controlled trial Summary of trial design/patient flow. Proximal DVT relates to acute thrombotic disease above the level of the trifurcation of the popliteal vein. Chronic DVT relates to any reported thrombosis detected on prior documented ultrasound, previously treated, or with chronic appearance on contemporary ultrasound exam. DVT = deep vein thrombosis.Back to article page