Magnetic resonance evaluation of mitral stenosis.
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.
Park
J H
JH
Department of Radiology, Seoul National University Hospital, Korea.
Han
M C
MC
Oh
B H
BH
Im
J G
JG
Kim
S H
SH
D000293:Adolescent; D000328:Adult; D000368:Aged; D004562:Electrocardiography; D005260:Female; D006325:Heart Atria / Q000473:pathology; D006331:Heart Diseases / Q000150:complications / Q000175:diagnosis; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods; D008297:Male; D008875:Middle Aged; D008946:Mitral Valve Stenosis / Q000150:complications / Q000175:diagnosis* / Q000503:physiopathology; D011669:Pulmonary Wedge Pressure; D013927:Thrombosis / Q000150:complications / Q000175:diagnosis