aggravation of the arrhythmia on exercise defined as a large increase , even transient of the number of extrasystoles ( 7 cases ) or changing to a higher grade ( 59 cases ) was significantly less common ( p less than 0,01 ) in the idiopathic group ( 30 p. 100 ) than in the other groups ( 64,1 p. 100 in the coronary , 65,2 p. 100 in the mitral valve prolapse group ) .
C0003811
arrhythmia
C0340464
extrasystoles