Resumen

COLL C, Claudia et al. Performance of Thallium²⁰¹ rest-redistribution Spect to predict viability in recent myocardial infarction. Rev. méd. Chile [online]. 2002, vol.130, n.3, pp.243-250. ISSN 0034-9887.  http://dx.doi.org/10.4067/S0034-98872002000300001.

Background: The detection of viability after acute myocardial infarction is primordial to select the most appropriate therapy, to decrease cardiac events and abnormal remodeling. Thallium²⁰¹ SPECT is one of the radionuclide techniques used to detect viability. Aim: To evaluate the use of Thallium²⁰¹ rest-redistribution SPECT to detect myocardial viability in reperfused patients after a recent myocardial infarction. Patients and methods: Forty one patients with up to of 24 days of evolution of a myocardial infarction were studied. All had angiographically demonstrated coronary artery disease and were subjected to a successful thrombolysis, angioplasty or bypass grafting. SPECT Thallium²⁰¹ images were acquired at rest and after 4 h of redistribution. These results were compared with variations in wall motion score, studied at baseline and after 3 or 4 months with echocardiography. Results: The sensitivity of rest-redistribution Thallium²⁰¹ SPECT, to predict recovery of wall motion was 91% when patient analysis was performed and 79% when segmental analysis was done in the culprit region. The figures for specificity were 56 and 73% respectively. Conclusions: Rest-distribution Thallium²⁰¹ SPECT has an excellent sensitivity to predict myocardial viability in recent myocardial infarction. The data obtained in this study is similar to that reported for chronic coronary artery disease (Rev Méd Chile 2002; 130: 243-50).

Palabras clave : Coronary disease; Myocardial infarction; SPECT; Thallium²⁰¹.