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Implantation of a biventricular defibrillator system in a patient with persistent left and absent right superior vena cava
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A 61-year-old man with a previous myocardial infarction experienced heart failure symptoms (New York Heart Association functional class III). An echocardiogram revealed a severely impaired left ventricular ejection fraction (15%) under optimal medical treatment. Since he also showed a complete left bundle branch block and pronounced dyssynchrony on echocardiography he was …