on February 17, 2003
Circulation. 2003
Published online before print February 17, 2003, doi: 10.1161/01.CIR.0000053558.55471.2D
Published online before print February 17, 2003, doi: 10.1161/01.CIR.0000053558.55471.2D
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Submitted on August 29, 2002
From the Cardiovascular Imaging Center, Department of Cardiovascular Medicine (J.K., T.S., D.A.A., Z.B.P., J.X.Q., W.J.S., J.D.T.) and Department of Cardiac Surgery (M.A.G., D.M.C., P.M.M.), The Cleveland Clinic Foundation, Cleveland, Ohio. * To whom correspondence should be addressed. E-mail: shiotat{at}ccf.org.
Background--This study was conducted to elucidate the geometric differences of the mitral apparatus in patients with significant mitral regurgitation caused by ischemic cardiomyopathy (ICM-MR) and by idiopathic dilated cardiomyopathy (DCM-MR) by use of real-time 3D echocardiography (RT3DE). Methods and Results--Twenty-six patients with ICM-MR caused by posterior infarction, 18 patients with DCM-MR, and 8 control subjects were studied. With the 3D software, commissure-commissure plane and 3 perpendicular anteroposterior (AP) planes were generated for imaging the medial, central, and lateral sides of the mitral valve (MV) during mid systole. In 3 AP planes, the angles between the annular plane and each leaflet (anterior, A Conclusions--The pattern of MV deformation from the medial to the lateral side was asymmetrical in ICM-MR, whereas it was symmetrical in DCM-MR. RT3DE is a helpful tool for differentiating the geometry of the mitral apparatus between these 2 different types of functional mitral regurgitation.
Revised on November 20, 2002
Accepted on November 21, 2002
Geometric Differences of the Mitral Apparatus Between Ischemic and Dilated Cardiomyopathy With Significant Mitral Regurgitation. Real-Time Three-Dimensional Echocardiography Study
Jun Kwan MD, 
MD,
; posterior, P) were measured. In ICM-MR, A measured in the medial and central planes was significantly larger than that in the lateral plane (39±5°, 34±6°, and 27±5°, respectively; P<0.01), whereas P showed no significant difference in any of the 3 AP planes (61±7°, 57±7°, and 56±7°, P>0.05). In DCM-MR, both A (38±8°, 37±9°, and 36±7°, P>0.05) and P (59±6°, 58±5°, and 57±6°, P>0.05) revealed no significant differences in the 3 planes.
Key words: mitral valve • echocardiography • cardiomyopathy
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