[Thallium-201 scintigraphy of the myocardium during exertion in the indication for aortocoronary bypass of an area in the myocardium, the site of an infarct].
The purpose of this study is to precisely evaluate the indications and the results of direct revascularization surgery in a myocardial area previously infarcted. 35 cases were analyzed using thallium scintigraphy during stress. Before surgery, the patients were divided in two groups. Group I (18 cases) includes patients who presented initially a regional hypoperfusion and a reperfusion at the site of the infarction, on late scintigrams; group II (17 cases) also presented a regional hypoperfusion initially, but showed no reperfusion on late scintigrams. Concerning the results during stress, the thallium 201 scintigrams during exercise show alterations of the myocardial perfusion in the infarcted area, before and after surgery; in group I, a significant improvement (p less than 0.01) is noted in the entire group, i.e. 16 patients (88.9%), except in 2 cases where the graft was occluded, and group II shows an improvement in only 4 cases (NS) after surgery. Concerning the modifications of the product pressure X cardiac rhythm, there is a significant improvement (p less than 0.01) in group I (14 out of 18 patients (77.8%)); 2 out of 4 patients who were aggravated, presented occluded grafts after surgery. Group II shows an improvement in 10 out of 17 patients (58.8%) after surgery (NS). The left ventriculography demonstrates alterations in the global ejection fraction. Group I shows a significant improvement in 15 out of 18 patients (88.3%) (p 0.01); in group II there is improvement in 11 out of 17 patients (64.7%) (NS) after surgery.(ABSTRACT TRUNCATED AT 250 WORDS)
D000328:Adult; D000368:Aged; D001026:Coronary Artery Bypass; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009203:Myocardial Infarction / Q000000981:diagnostic imaging* / Q000503:physiopathology / Q000601:surgery; D005082:Physical Exertion; D011184:Postoperative Period; D011868:Radioisotopes; D011877:Radionuclide Imaging; D013318:Stroke Volume; D013793:Thallium
D011868:Radioisotopes; D013793:Thallium
Apport de la scintigraphie du myocarde au thallium 201 à l'effort dans l'indication du pontage aorto-coronarien d'un territoire myocardique ayant été le siège d'un infarctus.