of 95 consecutive patients with active variant angina who underwent ergonovine testing in the coronary care unit while off treatment , 24 ( 25 % ) developed serious ventricular arrhythmias : ventricular tachycardia in eight , bigeminy in seven , pairs in five , and frequent ventricular extrasystoles in four .
C0002963
variant angina
C0014704
ergonovine