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Figure 3 Coronary sinus angiogram in a patient with ischemic cardiomyopathy (right anterior oblique 30° view). This angiogram highlights lateral segmental branch and the multiple second-order tributaries originating in the basal (B), mid (M), and apical (A) regions, coursing in the anterior (apical branch) and posterior direction (i.e., branches from the basal and mid-region). LV = lateral marginal vein; GV = great cardiac vein; AV = anterior interventricular vein.