Superiority of dipyridamole over exercise testing when exercise thallium imaging is limited by angina
Lette, J.; Waters, D.; Cerino, M.; Lapointe, J.
Canadian Journal of Cardiology 6(8): 340-342
1990
ISSN/ISBN: 0828-282X PMID: 2268797 Document Number: 364100
The extent of jeopardized myocardium can be underestimated on stress thallium myocardial perfusion images when exercise tolerance is limited by angina pectoris. A patient's tolerance for pain can influence the degree of myocardial ischemia observed on myocardial perfusion images during effort angina. A case is reported of a patient with angina pectoris showing mild ischemia limited to one myocardial segment on exercise thallium images, but severe and extensive reversible perfusion defects during dipyridamole-thallium imaging, and a 70% stenosis of the left main coronary artery on coronary angiography.