Donald C Oxorn. Intraoperative echocardiography. Heart 2008;94:1236–43. On page 1237 of this article (first paragraph of the second column) the last sentence should read: The presence of multiple jets will require additional tests to quantitate regurgitation severity; the presence of systolic reversal in pulmonary veins indicates severe MR and the presence of pan diastolic flow reversal in the descending aorta indicates severe AR.