Can Simple Doppler Measurements Estimate Interatrial Conduction Time? |
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Authors: | DRAGOS COZMA&dagger ,JEROME KALIFA,SORIN PESCARIU&dagger ,DANIEL LIGHEZAN&dagger ,MARCEL STIUBEI&dagger ,CONSTANTIN TUDOR LUCA&dagger ,JEAN-CLAUDE DEHARO,PIERRE DJIANE, STEFAN-IOSIF DRAGULESCU&dagger |
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Affiliation: | From the Institute of Cardiovascular Medicine, Timisoara, Romania;, and the Hopital Sainte Marguerite, Marseille, France |
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Abstract: | COZMA, D., et al.: Can Simple Doppler Measurements Estimate Interatrial Conduction Time? Prolongation of the interatrial conduction time (ia-CT) is considered an important factor in the pathophysiology of atrial fibrillation (AF) and as a criterion to perform multisite atrial pacing. Measurement of ia-CT requires an electrophysiologic study. The aim of this study was to compare echocardiographic with electrophysiologic measurements to determine if they are correlated. Methods and Results: The study included 32 consecutive patients who underwent electrophysiologic studies. We measured ia-CT between the high right atrium and the distal coronary sinus. In all patients we measured P wave duration, left atrial diameter and area, and ia-CT by Doppler echocardiography was measured as the difference in time intervals between the QRS onset and the tricuspid A wave, and the QRS onset and the mitral A wave (DT). Ia-CT was statistically correlated with DT (r = 0.79, P < 0.0001) , but not with P wave duration or left atrial dimensions. Conclusions: Measurement DT may be reliable to estimate ia-CT without invasive procedure. Accordingly, DT could be used as a simple selection criterion when considering patients for atrial resynchronization therapy. (PACE 2003; 26[Pt. II]:436–439) |
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