RESUMO
30 patients, undergoing coronary angiography for diagnostic and/or bypass surgery evaluation, have been studied also by intracoronary scintigraphy (IS). Scintigraphic and angiographic data have been compared: --21 cases had concordant results: normal in 2 patients (quite normal coronary system); pathological in 19, accounting for a damage both of the principal coronary artery branches and the arteriolar-capillary system: --6 cases had a pathological angiography with a normal IS: an indication of a normal myocardial perfusion; --in 3 cases a normal angiography was coupled with a pathological IS, pointing out a damage of the arteriolar-capillary system. On the basis of these results and of the literature, the AA. emphasize that the IS, allowing an exact evaluation of the myocardial perfusion, complete the essential morphological informations of the coronary angiography and it is specifically useful: --in the candidates to bypass coronary surgery; a viable myocardium is important both for surgery indication and results; --in bypassed patients to assess patency and the actual blood delivery (also for the low reliability of e.v. Thallium); --in patients with typical angina and positive stress test but with normal coronary angiography, to establish an organic lesion of the arteriolar-capillary system.
