in 55 patients with coronary artery disease ( n = 37 ) , cardiomyopathy ( n = 12 ) , or myocarditis ( n = 6 ) and programmable ventricular or dual-chamber atrioventricular ( av ) demand pacemakers , left ventricular ( lv ) performance was studied by gated radionuclide ventriculography during pacing ( 60 or 70 to 120 bpm ) .
C0878544
cardiomyopathy
C0027059
myocarditis