Thallium myocardial scintigraphy in single left coronary artery.

A case of single left coronary artery is presented with the correlation between the results of thallium-201 (T1-201) myocardial single photon emission computed tomography (SPECT) and coronary angiographic findings. The chest pain in this case might be partly secondary to the myocardial ischemia, under stress, which could result from the steal phenomenon to normal perfusion myocardium due to anatomical anomaly of single left coronary artery. Our findings suggest that T1-201 myocardial SPECT could be a useful method for detecting myocardial ischemia in patients with single left coronary artery.