Mitral regurgitation associated with mitral annular dilation in patients with lone atrial fibrillation: an echocardiographic study.
BACKGROUND
Whether and how lone atrial fibrillation (AF) is associated with functional mitral regurgitation (MR) remain unclear.


METHODS
We studied 12 lone AF patients without left ventricular (LV) dysfunction and/or dilatation, who underwent mitral valve annuloplasty for functional mitral regurgitation (MR). Ten lone AF patients without MR served as controls.


RESULTS
Lone AF Patients with MR had a greater mitral valve annular area and left atrial area than those without MR. There were no differences in LV volumes or LV ejection fraction.


CONCLUSIONS
Therefore, we concluded that left atrial dilation and corresponding mitral annular dilation may cause MR in lone AF patients without LV dysfunction and/or dilatation.
Kihara
Takashi
T
Department of Cardiovascular Medicine, The Cleveland Clinic, Cleveland, Ohio 90048, USA. shiotat@cshs.org
Gillinov
A Marc
AM
Takasaki
Kunitsugu
K
Fukuda
Shota
S
Song
Jong-Min
JM
Shiota
Maiko
M
Shiota
Takahiro
T
D000368:Aged; D000369:Aged, 80 and over; D001281:Atrial Fibrillation / Q000150:complications* / Q000000981:diagnostic imaging*; D004108:Dilatation, Pathologic / Q000000981:diagnostic imaging; D004452:Echocardiography; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D008944:Mitral Valve Insufficiency / Q000150:complications* / Q000000981:diagnostic imaging*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity