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Echocardiography. 2009 Jul;26(6):720-3. doi: 10.1111/j.1540-8175.2008.00877.x.

Biphasic pulmonary regurgitation.

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Cardiovascular Division, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA.


A patient with first-degree atrioventricular (AV) block and pulmonary regurgitation underwent a transthoracic echocardiogram. Continuous wave Doppler interrogation of the pulmonic valve displayed a biphasic regurgitation pattern. A discussion of the potential mechanism underlying this pattern is presented.

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