Table 2.

Arrhythmic events of three patients remaining on CRT-D despite super-response.

Patient	Cardiomyopathy	LVEF at event	Event	Therapy	Follow-up
Male 25 years	DCM (LVEF initially 20%)	55%	VT (CL 245 ms) @ 68 months triggered by sports	Several ATP 2× shock	Persistent super-response (LVEF 58%), no further arrhythmic events
Male 62 years	CAD with inferior infarction, ACBP (LVEF initially 30%)	50%	VF @ 138 months no triggering factors identified	ATP during charging	Elective PCI due to unstable angina, LVEF 54%, no further arrhythmic events
Male 38 years	DCM (LVEF initially 10%)	22% (at first GE super-response to 50%)	VT (CL 280 ms) @ 154 months	3× ATP, 4× shock	Further deterioration, LVAD implantation, progression of CHF, death due to haemorrhagic shock after 189 months

ACBP, aorta-coronary bypass; ATP, anti-tachycardia pacing; CAD, coronary artery disease; CHF, congestive heart failure; CL, cycle length; DCM, dilated cardiomyopathy; GE, generator exchange; LVAD, left ventricular assist device; LVEF, left ventricular ejection fraction; PCI, percutaneous coronary intervention; VF, ventricular fibrillation; VT, ventricular tachycardia.