programmed electrical stimulation identified two groups of subjects : group 1 comprised 20 patients ( 27 % ) in whom vt or ventricular fibrillation was induced , group 2 comprised 53 patients ( 73 % ) in whom no ventricular arrhythmia or only two to four repetitive ventricular responses were induced .
C0042514
vt
C0085612
ventricular arrhythmia