Magnetic resonance evaluation of mitral stenosis |
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Authors: | Jae Hyung Park M.D. Man Chung Han Byung Hee Oh Jung-Gi Im Seung Hyup Kim |
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Affiliation: | (1) Department of Internal Medicine, Seoul National University Hospital, Seoul, Korea;(2) Department of Radiology, Seoul National University Hospital, 28 Yongondong Chongno-gu, 110-744 Seoul, Korea |
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Abstract: | In order to study magnetic resonance (MR) abnormalities in mitral stenosis electrocardiogram (ECG)-gated MR imaging was performed with a 2.0 T MR system in 41 patients with mitral stenosis before catheterization. Mean transverse diameter of the left atrium was 8.9±1.4 cm and anteroposterior diameter was 5.1±1.0 cm, indicating significant enlargement. Homogeneous or inhomogeneous flow-related signals in ventricular diastole were detected in the left atrial cavity in 32 cases (78%), and in the atrial appendage in 35 cases (85%). In 21 patients having a mean wedge pulmonary arterial pressure higher than 20 mm Hg, 20 patients (95%) showed flow-related signals in ventricular diastole. Other MR findings were mitral valve doming in diastole, flow-related signal in the pulmonary artery during systole, and left atrial thrombi. |
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Keywords: | Mitral valve, stenosis Heart, MR studies Heart, thrombosis ECG-gated MRI |
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