Journal of the American College of Cardiology
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J. Am. Coll. Cardiol. · Jun 1994
Influence of pacing-induced myocardial ischemia on left atrial regurgitant jet: a transesophageal echocardiographic study.
We investigated the influence of pacing-induced myocardial ischemia on systolic regurgitant jet in the left atrium, using simultaneous transesophageal echocardiography and transesophageal atrial pacing. ⋯ Quantitative changes in geometry and function of the left ventricle caused by pacing-induced myocardial ischemia augments systolic regurgitant jet size. An increase in the jet during atrial pacing is associated with new or increased wall motion abnormalities, especially of the posterior wall. Pacing-induced anterior wall motion abnormalities appear not to be related directly to an increase in the jet.