BACKGROUND: The role of @entity591 -induced @entity296 vs @entity591 -related short diastolic filling period and reduced @entity11706 in decline of left ventricular ejection fraction (LVEF) in @entity955 ( @entity955 ) is uncertain. We aimed to characterize left heart changes over time in @entity1 with @entity955 who undergo electrical cardioversion (ECV). METHODS: Consecutive @entity955 @entity1 who were to undergo ECV were enrolled. @entity1 with unstable or @entity712 , severe @entity340 , recent open-heart surgery, major disorders, or an unsuccessful ECV were excluded. Transthoracic echocardiography, including 3-dimensional left atrial and ventricular volume acquisitions, was performed 1-2 hours before and after ECV, and 4-6 weeks later. RESULTS: In 73 @entity1 (77% male, 66    11 years), ECV resulted in an immediate increase in LVEF (from 43 [interquartile range (IQR), 33-50%] to 48 [IQR, 40-53%]; P < 0.0001). Four to 6 weeks after ECV, ejection fraction increased further in @entity1 who remained in sinus rhythm (SR) (n  = 55) to 55 (IQR, 44-62)%; P < 0.001. In @entity1 with @entity955 relapse, LVEF returned to values comparable to pre-ECV (n  = 18) (44 [IQR, 32-51]%; P  = 0.03). The atrial emptying fraction did not significantly change immediately after ECV (n  = 69; from 20 [IQR, 13-25]% to 20 [IQR, 15-28]%; P  = 0.14). Only @entity1 who remained in SR showed an increase in atrial emptying fraction after 4-6 weeks (n  = 51; to 37 [IQR, 26-48]%; P < 0.0001 vs post-ECV). CONCLUSIONS: Immediate improvement in LVEF after ECV explains approximately 50% of total LVEF increase over time. However, in SR, LVEF, and atrial function continuously increase over 4-6 weeks after ECV. This might be attributable to recovery of @entity591 -induced @entity296 .

Effects of sinus rhythm maintenance on left heart function after electrical cardioversion of @entity955 : implications for XXXX -induced @entity296 .

@entity1 :: ('9606', 'Species') :: ['Patients', 'patients'] @entity296 :: ('MESH:D009202', 'Disease') :: ['cardiomyopathy'] @entity712 :: ('MESH:D006333', 'Disease') :: ['acute heart failure'] @entity11706 :: ('MESH:D018880', 'Disease') :: ['atrial contraction'] @entity591 :: ('MESH:D013610', 'Disease') :: ['tachycardia'] @entity955 :: ('MESH:D001281', 'Disease') :: ['atrial fibrillation', 'AF'] @entity340 :: ('MESH:D006349', 'Disease') :: ['valvular diseases']
@entity591 :: (MESH:D013610,Disease) :: ['tachycardia']
