DR P. MARAZZI / SCIENCE PHOTO LIBRARY DR P. MARAZZI / SCIENCE PHOTO LIBRARY
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Aorta surgery. Surgeon closing a patient's chest afterg heart surgery. The surgery was carried out to replace an aorta (the body's main artery) that had become dilated due to a bicuspid aortic heart valve (BAV). A BAV is a congenital defect of the aortic valve where it has two cusps (sealing flaps) rather than the usual three. This can reduce the strength of the descending aorta, leading to an increased risk of dilation or aneurysm.
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