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Impaired left atrial mechanical function after cardioversion: relation to the duration of atrial fibrillation.

Abstract：

OBJECTIVES:We hypothesized that the time course of the recovery of atrial systolic function may be related to the duration of atrial fibrillation before cardioversion and sought to study noninvasively the recovery of left atrial mechanical function utilizing serial transthoracic Doppler studies. BACKGROUND:Recovery of atrial mechanical function may be delayed for several weeks after successful cardioversion of atrial fibrillation to sinus rhythm. METHODS:After successful cardioversion, 60 patients with atrial fibrillation of brief (< or = 2 weeks, 17 patients), moderate (> 2 to 6 weeks, 22 patients) or prolonged (> 6 weeks, 21 patients) duration were followed up with serial transmitral pulsed Doppler echocardiography immediately (60 patients) and at 24 h (45 patients), 1 week (41 patients), 1 month (31 patients) and > 3 months (30 patients) after cardioversion. RESULTS:Atrial mechanical function is greater immediately and at 24 h and 1 week after cardioversion in patients with "brief" compared with "prolonged" atrial fibrillation. In all groups, atrial mechanical function increases over time, ultimately achieving similar levels. Full recovery of atrial mechanical function, however, is achieved within 24 h in patients with brief atrial fibrillation, within 1 week in patients with moderate-duration atrial fibrillation and within 1 month in patients with prolonged atrial fibrillation. CONCLUSIONS:Recovery of left atrial mechanical function is related to the duration of atrial fibrillation before cardioversion. These findings have important implications for assessing the early hemodynamic benefit of successful cardioversion.

journal_name

J Am Coll Cardiol

journal_title

Journal of the American College of Cardiology

authors

Manning WJ,Silverman DI,Katz SE,Riley MF,Come PC,Doherty RM,Munson JT,Douglas PS

doi

10.1016/0735-1097(94)90652-1

subject

Has Abstract

pub_date

1994-06-01 00:00:00

pages

1535-40

issue

7

eissn

0735-1097

issn

1558-3597

pii

0735-1097(94)90652-1

journal_volume

23

pub_type

杂志文章

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