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Video 13-3-4 (LR): (L) Long axis view of the AV with color Doppler pre BAV demonstrating mild AR. An increase in the degree of aortic regurgitation (AR) post BAV is seen in the next video. (R) Long axis view of the AV with color Doppler post BAV demonstrating an increase in the degree of aortic regurgitation (AR). Some of the AR is due to the presence of a catheter across the valve. Severe AR due to disruption of the AV is a potential complication of BAV.

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