Quantification of valvular aortic stenosis by magnetic resonance imaging.

Abstract

BACKGROUND Assessing the aortic valvular orifice is important in judging the severity of aortic stenosis. Magnetic resonance imaging visualizes in-plane valvular motion. We studied the value of magnetic resonance planimetry of the aortic valve orifice. METHODS We used breath-hold gradient echocardiographic sequences on a clinical magnetic resonance system (1.5 T) and studied 25 patients with symptomatic valvular aortic stenosis. We performed a planimetry of the valvular orifice in systolic images of the valvular plane. The results were compared with echocardiography (continuity equation) and cardiac catheterization (Gorlin formula). RESULTS Magnetic resonance planimetry was feasible in all patients, and the image quality was invariably adequate. The magnetic resonance imaging results correlated well with the data calculated from catheterization and less robustly with the echocardiographic results. The 3 methods were similar in terms of leading to clinical decisions. CONCLUSIONS We suggest that magnetic resonance flow planimetry of the aortic valve orifice offers a simple, reliable, fast, and safe method to noninvasively quantify aortic stenosis.

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@article{Friedrich2002QuantificationOV, title={Quantification of valvular aortic stenosis by magnetic resonance imaging.}, author={Matthias G Friedrich and Jeanette Schulz-Menger and Thomas Poetsch and Bernhard Pilz and Frank Uhlich and Rainer Dietz}, journal={American heart journal}, year={2002}, volume={144 2}, pages={329-34} }