natural history , structural substrate , electrocardiographic and electrophysiologic characteristics and therapy were evaluated in 18 patients who demonstrated repetitive ventricular tachycardia , defined as repeated episodes of ventricular tachycardia that had a uniform qrs configuration and normal sinus-conducted qrs complexes between the episodes of tachycardia .
C0042514
ventricular tachycardia
C0039231
tachycardia