factors associated with failure of ser alone to cure ventricular tachycardia were presence of disparate sites of ventricular tachycardia origin ( greater than 5 cm between mapped sites of origin ; 64 % vs 30 % failure rate ) and presence of multiple morphologically distinct spontaneous tachycardias ( 47 % vs 25 % failure rate ) .
C0042514
ventricular
C0039231
tachycardias