technetium-tc-99m-tetrofosmin has been researched along with Coronary-Vessel-Anomalies* in 2 studies
2 other study(ies) available for technetium-tc-99m-tetrofosmin and Coronary-Vessel-Anomalies
| Article | Year |
|---|---|
Scintographic evidence of severe myocardial hypoperfusion in a patient with left anterior descending coronary artery bridging--case report and review of the literature.
Myocardial bridging is a congenital abnormality characterized by an intramyocardial course of a major epicardial coronary artery segment. Generally considered a benign condition, myocardial bridging has been associated with angina, acute myocardial infarction, and sudden death. Herein, we report a patient with an intramyocardial segment in the mid portion of the left anterior descending coronary artery with marked systolic compression. Single photon emission computed tomography with technetium-99m tetrofosmin done to evaluate an episode of chest pain showed a large predominantly fixed perfusion defect in the mid to apical anterior wall with partial reversibility. The patient's chest pain did not recur and repeat single photon emission computed tomography imaging 14 days later with rest-redistribution thallium-201 showed normal myocardial perfusion. The overall clinical impression was that myocardial bridging resulted in severe transient anterior myocardial hypoperfusion. The literature on prevalence, diagnosis, use of perfusion imaging, and hemodynamic effects of myocardial bridging is reviewed. Topics: Adenosine; Coronary Circulation; Coronary Vessel Anomalies; Hemodynamics; Humans; Male; Middle Aged; Myocardial Bridging; Myocardium; Organophosphorus Compounds; Organotechnetium Compounds; Radionuclide Imaging; Radiopharmaceuticals; Thallium Radioisotopes | 2008 |
Pitfalls of intervention therapy in a patient with anomalous origin of the right coronary artery from the left sinus of Valsalva associated with organic stenosis.
A 64-year-old man visited our hospital with a complaint of exertional chest discomfort. Exercise electrocardiography revealed ST segment depression in the V4-V6 leads, and exercise thallium myocardial scintigraphy demonstrated myocardial ischemia in the area of the right coronary artery, suggesting effort angina. Diagnostic coronary angiography revealed an anomalous origin of the right coronary artery from the left sinus of Valsalva and 90% organic stenosis at the proximal portion. We performed percutaneous transluminal coronary angioplasty (PTCA), but repeat PTCA was required 3 months later because of restenosis. Follow-up angiography 1 year later showed regression of the stenotic lesion to less than 50% diameter compared with the data obtained 3 months after the second PTCA. However, exercise 99mtechnetium-tetrofosmin myocardial scintigraphy disclosed obvious myocardial ischemia in the inferior region. These results suggested that the myocardial ischemia in this particular patient was caused not only by the organic stenosis but also by the anatomic anomaly which might reduce coronary blood flow during exercise. Such patients should be followed up cautiously with much more sophisticated methodology. Topics: Angioplasty, Balloon, Coronary; Constriction, Pathologic; Coronary Vessel Anomalies; Heart; Humans; Male; Middle Aged; Myocardial Ischemia; Organophosphorus Compounds; Organotechnetium Compounds; Radionuclide Imaging; Sinus of Valsalva | 1997 |