Circulation. 2003;107:1135-1140
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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(Circulation. 2003;107:1135.)
© 2003 American Heart Association, Inc.
Clinical Investigation and Reports |
Geometric Differences of the Mitral Apparatus Between Ischemic and Dilated Cardiomyopathy With Significant Mitral Regurgitation
Real-Time Three-Dimensional Echocardiography Study
, MDFrom 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.
Correspondence to Takahiro Shiota, MD, Department of Cardiovascular Medicine Desk F-15, The Cleveland Clinic Foundation, 9500 Euclid Ave, Cleveland, OH 44195. 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
; 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.
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.
Key Words: mitral valve • echocardiography • cardiomyopathy
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