Transient mitral regurgitation: an adjunctive sign of myocardial ischemia during dipyridamole-thallium imaging.
A patient developed transient exacerbation of a mitral insufficiency murmur and a reversible posterior wall perfusion defect during dipyridamole-thallium imaging. Coronary angiography showed significant stenoses of both the right and the circumflex coronary arteries that supply the posterior papillary muscle. Cardiac auscultation for transient mitral incompetence, a sign of reversible papillary muscle dysfunction, is a simple and practical adjunctive test for myocardial ischemia during dipyridamole-thallium imaging. It may confirm that an isolated reversible posterior wall myocardial perfusion defect is truly ischemic in nature as opposed to an artifact resulting from attenuation by the diaphragm.
Lette
J
J
Department of Cardiology, Maisonneuve-Rosemont Hospital Center, Montreal, Canada.
Gagnon
A
A
Lapointe
J
J
Cerino
M
M
D000368:Aged; D003326:Coronary Circulation / Q000187:drug effects; D003329:Coronary Vasospasm / Q000139:chemically induced; D004176:Dipyridamole / Q000009:adverse effects*; D005260:Female; D006321:Heart / Q000000981:diagnostic imaging*; D006801:Humans; D008944:Mitral Valve Insufficiency / Q000139:chemically induced*; D011877:Radionuclide Imaging; D013794:Thallium Radioisotopes
D013794:Thallium Radioisotopes; D004176:Dipyridamole