Fuenmayor AJ, Ramírez L, Fuenmayor AM

Language: English
References: 8
Page: 125-128
PDF size: 65.74 Kb.

ABSTRACT

Background: 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). Hypothesis: IACT can be assessed by means of echo-Doppler. Methods: 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. Results: 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). Conclusions: IACT can be non-invasively assessed by measuring the P-A interval.

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