Quality of life and health status after percutaneous coronary intervention in stable angina patients: results from the real-world practice.

BACKGROUND: Percutaneous coronary interventions (PCI) are associated with quality of life (QoL) and health status improvements in stable angina patients. There are few studies assessing the magnitude of this effect and its predictors in contemporary daily practice. METHODS: Prospective cohort study with stable angina patients submitted to PCI in a tertiary interventional cardiology center. The clinical characteristics and the Seattle Angina Questionnaire (SAQ) were assessed before PCI, and patients were followed-up for 1 year. Mixed linear regression and ANOVA were used to compare SAQ indices, and multivariate analysis to identify predictors of QoL improvement. RESULTS: Between September 2006 and May 2007, 110 patients were included. The mean age of the study population was 62.8 ± 8.7 years, and 62% of the patients were of the male gender. Diabetes mellitus was present in 29%, arterial hypertension in 82%, previous myocardial infarction in 32%, and previous PCI in 29%. Before PCI, only 5% of the patients were free of angina, and this rate improved to 68% in the one-year followup (P < 0.001). There was improvement in all SAQ scales in the one-year followup, which was already shown in the 6-month assessment (P < 0.0001). Quality of life before the procedure was the main predictor of QoL improvement by multivariate analysis (P < 0.001). CONCLUSIONS: Patients with stable angina submitted to PCI in the real-world practice present significant improvement in one-year health status, as assessed by the SAQ. Quality of life before the procedure is the main determinant of improvement in QoL.

Perfil de risco de reestenose em pacientes submetidos a implante de stents coronarianos convencionais / Restenosis risk profile of patients submitted to coronary bare-metal stent implantation

Introdução: O perfil de risco de reestenose de populações tratadas com implante de stents coronarianos em nosso meio não é conhecido. Essa informação tem importância na decisão de incorporar uma estratégia seletiva de implante de stents farmacológicos pelo sistema público de saúde. Objetivos: Avaliar o risco de reestenose antes do procedimento de uma população de pacientes tratados com stents coronarianos convencionais. Método: Estudo observacional de corte transversal, com 4.482 pacientes tratados com 5.336 stents , no período de janeiro de 2000 a dezembro de 2007. O risco de reestenose foi avaliado conforme escore previamente validado, com pontuação de 0 a 5 conforme a presença de diabetes melito (1 ponto), o diâmetro de referência do vaso tratado (menor 3 mm igual 2 pontos, 3-3,5 mm igual 0) e a extensão da lesão (maior 20 mm igual 2 pontos, 10-20 mm igual 1, e menor 10 mm igual 0. Resultados: A média de idade foi de 60,6 mais ou menos 10,6 anos e 32 por cento dos pacientes eram do sexo feminino. O diâmetro de referência do vaso tratado foi de 3,10 maior e menor 0,51 mm, a extensão da lesão foi de 13,2 maior ou menor 5,9 mm e 20 por cento dos pacientes apresentavam diabetes melito. A distribuição dos pacientes conforme os pontos no escore de reestenose...

Background: The restenosis risk of patient populations treated with coronary stent implantation is not well studied. This information has a potential impact on the decision of incorporating a selective strategy of drug-eluting stent implantation by the public health system. Our objective was to evaluate the restenosis risk of a population of patients (pts) treated with bare-metal stents. Methods: Observational study with 4,482 pts treated with 5,336 stents, between January 2000 and December 2007. The restenosis risk was assessed according to a previous validated risk score. Points in the score ranged from 0 to 5 according to diabetes mellitus (1 point), reference vessel diameter (< 3 mm = 2 points, 3-3.5 mm = 1, and > 3.5 mm = 0), and the lesion length (> 20 mm = 2 points, 10-20 mm = 1, and < 10 mm = 0). Results: The mean age was 60.6 ± 10.6 years of age, and 32% were female. The mean reference vessel diameter was 3.10 mm ± 0.51mm, the lesion length was 13.2 mm ± 5.9 mm, and 20% of the pts were diabetics. The distribution of pts according to points in the risk score was the following: score 0 = 4% of the pts; score 1 = 22%; 2 = 34%; 3 = 29%; 4 = 9%; and score 5 = 1% of the pts. Conclusions: The majority of pts presented low or intermediate restenosis risk. The adoption of a selectivestrategy of drug-eluting stent implantation only in those at higher restenosis risk would represent its use in no more than 20% of the procedures.