Planimetry of Mitral Valve Stenosis by Magnetic Resonance Imaging
Behrus Djavidani, MD*,*,
Kurt Debl, MD ,
Markus Lenhart, MD*,
Johannes Seitz, MD*,
Christian Paetzel, MD*,
Franz X. Schmid, MD ,
Wolfgang R. Nitz, PhD*,
Stefan Feuerbach, MD*,
Günter Riegger, MD and
Andreas Luchner, MD
* Department of Diagnostic Radiology, University Hospital of Regensburg, Regensburg, Germany.
Department of Internal Medicine II, University Hospital of Regensburg, Regensburg, Germany.
Department of Cardiothoracic Surgery, University Hospital of Regensburg, Regensburg, Germany.
View larger version (116K):
[in a new window]
|
Figure 1 Magnetic resonance images to define the imaging plane. Diastolic two-chamber (a), four-chamber (b), and three-chamber (c) views. A jet originating from the mitral valve leaflets is visible. The subsequent slices were defined perpendicular to the valvular plane and, in cases of orifices with an eccentric outlet, perpendicular to the origin of the jet in the left ventricle. Visualization of the diastolic opening of the mitral valve orifice. (d) Systolic image parallel to the closed mitral valve. (e) Diastolic image of the same plane showing the small orifice in this patient. (f) Planimetry as drawn in with a resulting orifice area of 0.6 cm2, representing severe mitral stenosis (corresponding cardiac catheterization-mitral valve area resulted also in 0.6 cm2 and echocardiography-mitral valve area resulted in 0.7 cm2).
|
|
View larger version (11K):
[in a new window]
|
Figure 2 (A) Scattergram of mitral valve area (MVA) determined by magnetic resonance imaging (MRI) and cardiac catheterization (CATH) in 17 patients. (B) Bland-Altman plot of the average mean versus the differences between MRI planimetry and MVA derived at CATH. The solid line is the mean difference; the dotted lines mark the standard deviations of the differences.
|
|
View larger version (11K):
[in a new window]
|
Figure 3 (A) Scattergram of MVA determined by MRI and echocardiography (ECHO) in 22 patients. (B) Bland-Altman plot of the average mean versus the differences between MRI planimetry and MVA derived at ECHO. The solid line is the mean difference; the dotted lines mark the standard deviations of the differences. Abbreviations as in Figure 2.
|
|
View larger version (11K):
[in a new window]
|
Figure 4 (A) Scattergram of MVA determined by ECHO and CATH in 17 patients. (B) Bland-Altman plot of the average mean versus the differences between MRI planimetry and MVA derived at CATH. The solid line is the mean difference; the dotted lines mark standard deviations of the differences. Abbreviations as in Figures 2 and 3.
|
|
|
