Cardiac Resynchronization Therapy for Mitral Systolic Anterior Motion in a Child

We describe the successful use of cardiac resynchronization therapy for treatment of mitral valve systolic anterior motion with left ventricle outflow tract obstruction after re-excision of a subaortic membrane and septal myectomy in a 12-year-old child. In the recovery phase, a total atrioventricular block persisted. Therefore a permanent atrioventricular pacing system was implanted.