supraventricular extrasystole was found in 100 % of patients with the sinus rhythm , and ventricular extrasystoles , in 94 % of patients , being most commonly associated with poor prognosis ( polytopic extrasystoles in 84 % , paired extrasystoles in 60 % , and paroxysmal ventricular tachycardia in 40 % ) .
C0033036
supraventricular extrasystole
C0340464
extrasystoles