it is concluded that disopyramide ( 1 ) prevents induction of ventricular tachyarrhythmias in one third of patients studied and remains clinically effective in approximately 80 % , ( 2 ) is more frequently effective in rapid tachycardias , ( 3 ) prolongs the vt cycle length when ineffective , and ( 4 ) may produce marked hemodynamic embarrassment in patients with significant left ventricular dysfunction .
C0039231
tachycardias
C0042514
vt