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Comparative Study
. 2002 Apr-Jun;72(2):125-8.

Validation of inter-atrial conduction time measurement by means of echo-Doppler

Abdel J Fuenmayor  1 , Leonardo Ramírez, Abdel M Fuenmayor
Affiliations
  • PMID: 12148331
Comparative Study

Validation of inter-atrial conduction time measurement by means of echo-Doppler

Abdel J Fuenmayor et al. Arch Cardiol Mex. 2002 Apr-Jun.

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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