Significance of QRS transition zone to the right on the chest in cases with short P-R interval.
The QRS transition zone to the right on the chest may occur in posterior fibrosis or necrosis, in right ventricular strain but also in a large number of non-cardiac people, some of them presenting a short P-R interval (93 patients with tall R waves in V3 from 331 with short P-R in our study). The incidence of right deviation of QRS transition zone was 28% in cases with short P-R interval and only 16% in cases with normal atrioventricular conduction. Our data suggest that right deviation of QRS transition zone in cases with short P-R interval may be produced by abnormal ventricular depolarisation--similar to that encountered in cases with patent accelerated atrioventricular conduction through accessory pathway (WPW type A).
D000328:Adult; D000368:Aged; D001145:Arrhythmias, Cardiac / Q000175:diagnosis*; D006332:Cardiomegaly / Q000175:diagnosis*; D003327:Coronary Disease / Q000175:diagnosis*; D004562:Electrocardiography; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D014927:Wolff-Parkinson-White Syndrome / Q000175:diagnosis*