Sievers type II bicuspid aortic valve (BAV) is a rare disease that has been associated with more severe aortopathy than the more common type I BAV. To study the relation between aortic valve (AV) morphology and altered aortic hemodynamics in this disease, 4D flow MRI data from 32 type II BAV patients with different AV fusion types were analyzed. The helicity direction of blood flow in the ascending aorta was found to be influenced by AV morphology. Additional research with a larger cohort and comparison to type I BAV should render further insights into the pathophysiologic mechanism underlying BAV aortopathy.
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