Relationship between atrial function, left ventricular isovolumic relation time, and early filling in dual chamber-paced patients

Journal of the American Society of Echocardiography : Official Publication of the American Society of Echocardiography
R RossiM G Modena

Abstract

This investigation was performed to study atrial systolic function is response to modification of atrioventricular delay in a sample of 36 patients with a DDD pacemaker implanted for complete atrioventricular block. The relation between atrial systolic performance and diastolic-related parameters was also evaluated. Isovolumic relaxation time, early diastolic peak velocity, late (atrial) diastolic peak velocity, atrial filing fraction, and atrial ejection force were recorded at a pacing rate of 70 impulses/min and at atrioventricular delay of 200, 150, and 100 msec. Our data showed that the progressive shortening of atrioventricular delay induced a gradual increase in early peak velocity (median value 46 to 53 to 61.5 cm/sec, respectively, at 200, 150, and 100 msec intervals) and a gradual decrease in isovolumic relaxation time (median 92.6 to 81.5 to 69.7 msec at 200, 150, and 100 msec, respectively), atrial peak velocity (59 to 52 to 44.5 cm/sec at 200, 150, and 100 msec, respectively), atrial filling fraction (50.5% to 40% to 23.5% at 200, 150, and 100 msec, respectively), and atrial ejection force (17.2 to 14.7 to 8.5 kilodynes at 200, 150, and 100 msec, respectively). For every atrioventricular delay value detected, we fou...Continue Reading

References

Nov 1, 1992·Pacing and Clinical Electrophysiology : PACE·C M Linde-EdelstamS K Pehrsson
Mar 1, 1989·Journal of the American College of Cardiology·W J ManningP C Come
May 1, 1987·Journal of the American College of Cardiology·A N DeMaria, T Wisenbaugh
Sep 1, 1987·The American Journal of Cardiology·M WishA I Cohen

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