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Updated: Jan 29, 2026

In vitro Assessment of Aortic Regurgitation Using Four-Dimensional Flow Magnetic Resonance Imaging
Published on: February 25, 2022
Mechanical haemolytic anaemia assessed with four-dimensional flow cardiac magnetic resonance
Wataru Uchida1, Yoshiyuki Tokuda1, Yasuo Takehara2
1Department of Cardiac Surgery, Nagoya University Graduate School of Medicine, Nagoya, Aichi, Japan.
Abstract:
A 66-year-old woman developed marked haemolytic anaemia 2 years after total aortic arch replacement using a branched Dacron graft. Echocardiography confirmed bicuspid aortic valve stenosis. A four-dimensional flow magnetic resonance imaging revealed a jet flow arising from the aortic valve along with the vortex and turbulent flow inside the kinked prosthetic graft at the ascending aorta. She underwent a reoperation to replace the aortic valve and correct the kinking. The estimated energy loss after intervention was relieved to 2.9 mJ/cardiac cycle from 4.3 mJ/cardiac cycle before intervention. The patient's anaemia resolved immediately after the reoperation.
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