The "compensatory pause" of XXXX .

@entity1540 @entity1 @entity955
A long pause after an abnormal heat during @entity955 has been called a "compensatory pause" and has been used to identify @entity1540 ( @entity1540 ) and to differentiate them from supraventricular beats with aberration. The diagnostic value of the compensatory pause is controversial and has not been tested systematically with programmed stimulation and intracardiac recordings. In this study we used these methods to determine if @entity1540 induced during @entity955 were followed by compensatory pauses. Five @entity1 were studied who had ECGs with a normal PR interval and a normal QRS duration and morphology during sinus rhythm. @entity955 was induced by rapid atrial pacing. @entity1540 were induced by coupling a ventricular extrastimulus to every eighth or tenth QRS complex during @entity955 . The coupling interval of the PVC was changed in 10- or 20-msec increments until the entire cardiac cycle was scanned. The mean duration of recorded @entity955 was 15.7 minutes. Fifty-seven to 163 @entity1540 were induced in each @entity1 . The mean cycle after the induced PVC was calculated and compared with the mean control cycle. The mean cycle after the PVC was 107-136 msec longer than the mean control cycle (p < 0.001 in every @entity1 ). This study confirms the presence of a compensatory pause after stimulated @entity1540 in @entity955 .
