Survival analysis of patients undergoing coronary angioplasty with stent in a hospital in the south region of Santa Catarina state, Brazil <br><b>[Abstract in English]</b>

Abstract

AIMS: To analyze the survival of patients undergoing angioplasty with stent placement, at the Hospital Nossa Senhora da Conceição, Tubarão City, Santa Catarina state, Brazil. METHODS: A cohort study evaluated at the baseline the socio-demographic profile of patients undergoing coronary angioplasty with stenting in the period January to December 2009. After at least 16 months, their clinical outcome and survival were evaluated. RESULTS: Of the 84 patients studied, 9.5% were asymptomatic, 31% had stable angina, 21.4% had unstable angina, 32.2% had acute myocardial infarction treated before 24 hours of evolution and in 5.9% the intervention was performed after 24 hours of infarction. As for the results of coronary angiography, 59.5% had single vessel obstruction, 23.8% two-vessel, 15.5% triple vessel and 1.2% had blockage throughout the left coronary trunk. With regard to survival, 9.5% died, having the pattern of coronary obstruction as predisposing factors (p less than 0.001). Asymptomatic patients with stable angina had higher survival than patients with unstable angina or myocardial infarction. CONCLUSIONS: Ninety-four percent of interventions were successful, and the most common complication was stent restenosis. The greater the number of affected coronary arteries, the lower was the survival time. Previous infarction was not associated with survival. Patients with previous stroke had higher mortality. Patients with acute myocardial infarction with primary angioplasty alone, with symptoms lasting less than 24 hours and one-vessel obstruction, had longer survival.