Fuenmayor Abdel J, Ramírez Leonardo, Fuenmayor Abdel M
Cardiovascular Research Center, Department of Physiology, University of The Andes, Mérida, Venezuela.
Arch Cardiol Mex. 2002 Apr-Jun;72(2):125-8.
Little is known about the correlation between the inter-atrial conduction time (IACT) measured at the electrophysiology laboratory and the interval measured from the beginning of the electrocardiographic P wave to the initiation of the A wave in the mitral Doppler signal (P-A interval).
IACT can be assessed by means of echo-Doppler.
We studied 21 patients who were referred to our arrhythmia clinic for evaluation of supraventricular tachycardia. During the electrophysiological study, the IACT was measured from the first rapid deflection of the A wave recorded with the high right atrial catheter to the A wave recorded with the coronary sinus catheter. An independent observer measured the P-A interval. Both the electrophysiological and echo-Doppler measurements were corrected for heart rate.
P-A interval was slightly longer than IACT (83.36 +/- 23.91 vs 80.77 +/- 24.11 msec; p = 0.042), but a very good correlation was found between both measurements (r2 = 0.94).
IACT can be non-invasively assessed by measuring the P-A interval.
关于在电生理实验室测量的心房传导时间（IACT）与从心电图P波开始至二尖瓣多普勒信号中A波起始点之间测量的间期（P-A间期）的相关性，目前所知甚少。
IACT可通过回声多普勒进行评估。
我们研究了21例因室上性心动过速前来心律失常门诊评估的患者。在电生理研究期间，IACT是从高位右心房导管记录的A波的第一个快速偏转处测量至冠状窦导管记录的A波。由一名独立观察者测量P-A间期。电生理和回声多普勒测量均进行心率校正。
P-A间期略长于IACT（83.36±23.91对80.77±24.11毫秒；p = 0.042），但两种测量之间发现有非常好的相关性（r2 = 0.94）。
通过测量P-A间期可对IACT进行无创评估。
