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Unusual coronary sinus anatomy: the vein of Marshall
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A 76 year old man with dilated ischaemic cardiomyopathy, severe left ventricular dysfunction, and left bundle branch block was admitted for implantation of a biventricular internal cardioverter-defibrillator. The procedure was performed via the left subclavian approach and pacing leads were implanted into the right atrium and right ventricle. Coronary sinus (CS) angiography …