Abstracts XIX Brazilian Congress of Nuclear Medicine
1. CARDIOLOGY
Smanio P, Castro C, Martins D, LeBien D, Mostiack D, Valencia G, Thom AF. - Instituto Dante Pazzanese de Cardiologia, São Paulo.
This study aims to assess the value os post-exercise and post-dipyridamole MIBI-Tc-99m SPECT myocardial sicntigraphy to detect coronary artery reestenosis after stent implant. The results of 50 patients were analysed: 18 (36%) had reestenosis (Re) proven by cinecoronariography; 23 (52%) had maintained dilation results. Exercise stress scintigraphy (SC-1) was done in 34 patients and pharmacological stress scintigraphy (SC-2) in 16 patients. Those scintigraphies showing one or more reversible hypoperfused cardiac segments were called "positive". SC-1 was positive in 9/10 (93%) cases, SC-2 was positive in 8/8 (100%) with Re. From the 32 patients without Re, SC-1 was positive in 2/24 (10%) and SC-2 was positive in 1/8 (8,4%). Our results suggest that both stress and dipyridamole myocardial SPECT may be highly sensitive methods for the follow-up of patients with stent implant.