pacemaker heart failure defibrillator his bundle pacing left bundle branch block ecg marcapasos resynchronization icd cardiology cardiac resynchronization implantable defibrillator bloqueo de rama izquierda lead extraction insuficiencia cardiaca his bundle cardiologia catheter ablation cardiomyopathy atrial fibrillation wpw heart block electrophysiology bundle branch block cardiology ecg physiologic pacing clinical guidelines obesity alcohol anticoagulation venoplasty subclavian vein occlusion his dontdisthehis muerte subita amiodarone desfibrilador implantable taquicardia ventricular infection hypertrophic cardiomyopathy sudden death desfibriladores cirugía infecciones sincope desfibrilador arrhythmias icd lead extraction cardiology pacemakers pacemaker icd electromagnetic interference
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