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Omer Dzemali
Farhad Bakhtiary
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Asian Cardiovasc Thorac Ann 2008;16:278-283
© 2008 Asia Publishing EXchange Ltd

ORIGINAL CONTRIBUTIONS

Hemodynamic Evaluation of Aortic Regurgitation by Magnetic Resonance Imaging

Thomas Wittlinger, MD, Omer Dzemali, MD, Farhad Bakhtiary, MD, Anton Moritz, PhD, Peter Kleine, MD

Department of Thoracic and Cardiovascular Surgery, University Hospital, Frankfurt, Germany

For reprint information contact: Thomas Wittlinger, MD Tel: 49 69 6301 83315 Fax: 49 69 63013842 Email: thomaswittlinger{at}t-online.de, Department of Thoracic and Cardiovascular Surgery, University Hospital, Theodor-Stern Kai 7, 60590 Frankfurt, Germany.

Magnetic resonance imaging was compared with echocardiography and angiography in determining the regurgitant volume in patients with aortic regurgitation. Forty patients were examined at 1.5 T. The regurgitant jet was located using a gradient-echo sequence. Cine measurements were performed to calculate left ventricular function. For flow evaluation, a velocity-encoded breath-hold phase-difference magnetic resonance sequence was used. The degree of aortic regurgitation assessed by magnetic resonance imaging agreed with that of angiography in 28 of 40 (70%) patients, and with the echocardiography result in 80%. Correlation between calculated stroke volume by magnetic resonance cine and flow measurements was very good (r > 0.9). Magnetic resonance imaging enables quick and reliable quantitative assessment of aortic regurgitant volume, and it might be the optimal technique for multiple follow-up studies and assessment of left ventricular function, leading to better evaluation of disease severity and optimization of the timing of valve surgery.






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