Recovery of Left Ventricular Systolic Function After Biventricular Resynchronization Pacing in a Child With Repaired Tetralogy of Fallot and Severe Biventricular Dysfunction

Abstract

A 5-year-old child had undergone surgical repair of a ventricular septal defect and pulmonary stenosis at the age of 4 months. The repair required a total of 3 episodes of cardiopulmonary bypass and was complicated by complete atrioventricular block. Subsequently, a permanent dual-chamber pacemaker was implanted, with epicardial leads on the right atrium and the right ventricular outflow tract. Late postoperative complications included atrial ectopic tachycardia, controlled with amiodarone, and progressive left ventricular systolic dysfunction, treated with increasing doses of digoxin, captopril, furosemide, and hydrochlorothiazide-spironolactone. The patient was referred to our center for ongoing …