Thallium-201 myocardial imaging before and after coronary revascularization: assessment of regional myocardial blood flow and graft patency.
- 1 November 1977
- journal article
- research article
- Published by Wolters Kluwer Health in Circulation
- Vol. 56 (5), 830-836
- https://doi.org/10.1161/01.cir.56.5.830
Abstract
Twenty patients underwent myocardial imaging with Thallium-201 (201Tl) before and subsequent to coronary artery bypass grafting. All patients had rest and maximal treadmill exercise imaging postoperatively. Eleven of the 20 patients had rest and exercise 201Tl images preoperatively; 9/20 only had rest imaging preoperatively. Postoperative regional exercise perfusion was improved in seven of the 11 patients who had preoperative exercise images, and was associated with regional graft patency in each case. Thirteen of 20 patients showed no new defect with postoperative exercise imaging. The remaining seven patients developed or had an increased defect with exercise. The patients with no new perfusion defects during postoperative study has 26/30 grafts patent (87%). Patients developing a new perfusion defect with exercise had fewer grafts patent (7 of 13 [54%]; P less than 0.03). In these seven cases, a new exercise-induced defect was associated with regional graft closure or residual nonoperated disease. Knowledge of the preoperative coronary anatomy allowed the distinction between ungrafted areas and regional graft dysfunction. We conclude that preoperative and postoperative 201Tl imaging may noninvasively predict graft closure and/or improved regional perfusion with patent grafts.This publication has 9 references indexed in Scilit:
- Myocardial imaging with thallium-201 at rest and during exercise. Comparison with coronary arteriography and resting and stress electrocardiography.Circulation, 1977
- Thallium-201 myocardial perfusion imaging at rest and during exercise. Comparative sensitivity to electrocardiography in coronary artery disease.Circulation, 1977
- Myocardial Imaging with Radionuclide-Labeled ParticlesRadiology, 1976
- Abolition of ischemic response to atrial pacing following aortocoronary bypass surgery.Circulation, 1976
- Relief of angina pectoris in patients with occluded coronary bypass graftsAmerican Journal Of Medicine, 1976
- Medical Perspectives in Coronary Artery Surgery—A CaveatAnnals of Internal Medicine, 1974
- An Evaluation of Internal-Mammary-Artery Ligation by a Double-Blind TechnicNew England Journal of Medicine, 1959