BackgroundThe role of myocardial perfusion scintigraphy (MPS) in the follow-up of asymptomatic patients after percutaneous coronary intervention (PCI) is not established.ObjectivesTo evaluate the prognostic value and clinical use of MPS in asymptomatic patients after PCI.MethodsPatients who underwent MPS consecutively between 2008 and 2012 after PCI were selected. The MPS were classified as normal and abnormal, the perfusion scores, summed stress score (SSS), and summed difference score (SDS) were calculated and converted into percentage of total perfusion defect and ischemic defect. The follow-up was undertaken through telephone interviews and consultation with the Mortality Information System. Primary endpoints were death, cardiovascular death, and nonfatal acute myocardial infarction (AMI), and secondary endpoint was revascularization. Logistic regression and COX method were used to identify the predictors of events, and the value of p < 0.05 was considered statistically significant.ResultsA total of 647 patients were followed for 5.2 ± 1.6 years. 47% of MPS were normal, 30% were abnormal with ischemia, and 23% were abnormal without ischemia. There were 61 deaths, 27 being cardiovascular, 19 non-fatal AMI, and 139 revascularizations. The annual death rate was higher in those with abnormal perfusion without ischemia compared to the groups with ischemia and normal perfusion (3.3% × 2% × 1.2%, p = 0.021). The annual revascularization rate was 10.3% in the ischemia group, 3.7% in those with normal MPS, and 3% in those with abnormal MPS without ischemia. The independent predictors of mortality and revascularization were, respectively, total perfusion defect greater than 6%, and ischemic defect greater than 3%. Forty-two percent of the patients underwent MPS less than 2 years after PCI, and no significant differences were observed in relation to those who underwent it after that period.ConclusionAlthough this information is not contemplated in guidelines, in this study MPS was able to predict events in asymptomatic after PCI patients, regardless of when they were performed.

Pontos de Aprendizagem• Massas pericárdicas são frequentemente causadas por tumores metastáticos ou primários, mas podem, em casos raros, ser causadas por doenças inflamatórias, infecciosas ou granulomatosas, como a pericardite tuberculosa.

For decades, cardiovascular diseases, mainly coronary artery disease and stroke, have been the main cause of death in Brazil. In 2017, they accounted for 27.3% of all deaths in the country, with an age-standardized mortality rate of 178 per 100,000 inhabitants. 1 In the same year, cerebrovascular diseases had an age-standardized mortality rate of 80 per 100,000 inhabitants. 1 With respect to the burden of cardiovascular diseases, the number are even more concerning, with 1,602.4 disability-adjusted life years (DALYs) per 100,000 inhabitants for coronary disease and 1,145.3 DALYs per 100,000 inhabitants for stroke. 1