In a Middle Eastern PCI registry, the 1-year incidence of stent thrombosis was 1.97%, associated with high mortality, and independently predicted by baseline heart failure.
BACKGROUND: The incidence, risk factors, and outcome of stent thrombosis (ST) after percutaneous coronary intervention (PCI) in Middle Eastern patients are largely unknown. OBJECTIVE: To determine the incidence, risk factors and outcome in our population. DESIGN: Retrospective study of a prospective multicenter registry of consecutive patients who underwent PCI between January 2013 and February 2014 (JoPCR1). SETTING: 12 tertiary care centers in Amman and Irbid, Jordan. PATIENTS AND METHODS: We collected clinical baseline and follow-up data. MAIN OUTCOME MEASURES: Incidence of stent thrombosis. RESULTS: The mean (standard deviation) age of patients (n=2426) was 59.0 (10.1) years and 20.6% were women. Stents (n=3038) were drug eluting (89.6%), bare metal (9.4%) or bioabsorbable (1.0%). After 1 year, 47 patients (1.97%) had ST, including 44 (94%) definite and 3 (6%) probable ST. Patients who had ST presented with sudden death (n=6; 12.2%) or with a nonfatal event (n=43; 87.8%). Nonfatal events included non-ST-segment elevation acute coronary syndrome (26; 53%), acute ST segment elevation myocardial infarction (n=15; 31%) or heart failure (n=2; 4.1%). ST was associated with significantly higher one-month (22.0% vs. 0.7%) and one-year (12.3% vs. 0.73%) mortality rates compared with patients who did not have ST (P < .001). ST patients were younger (mean age 52.9 years vs. 58.4 years), had heart failure (64% vs. 18%), left ventricular ejection fraction (LVEF) < 45% (36% vs. 13%), ST-segment deviation (70% vs. 48%), and elevated cardiac biomarkers blood levels (62% vs. 40%). In the multivariate analysis, the only factor that was significantly associated with ST was the heart failure (OR=3.5, 95% confidence interval: 1.8, 6.6; P < .0001). CONCLUSIONS: The incidence of ST was not different from that in other regions and was associated with an increased one-year mortality. Younger age, heart failure, low LVEF, ST-segment deviation, and elevated blood levels of cardiac biomarkers were predictors of ST. LIMITATIONS: Possible selection bias, recall bias, and missing or incomplete information. The majority of patients were lost to follow up after the 6th month. The registry may not fully represent PCI practice and outcome in all areas in the country or region.
Saleh et al. (Fri,) studied this question.