JOURNAL ARTICLE
MULTICENTER STUDY
RANDOMIZED CONTROLLED TRIAL
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Early Ventricular Tachycardia or Fibrillation in Patients With ST Elevation Myocardial Infarction Undergoing Primary Percutaneous Coronary Intervention and Impact on Mortality and Stent Thrombosis (from the Harmonizing Outcomes with Revascularization and Stents in Acute Myocardial Infarction Trial).

The prevalence and impact of early ventricular arrhythmias (ventricular tachycardia [VT]/ventricular fibrillation [VF]) occurring before mechanical revascularization for acute ST segment elevation myocardial infarction (STEMI) treated with percutaneous coronary intervention are poorly understood. We sought to investigate the association between early VT/VF and long-term clinical outcomes using data from the Harmonizing Outcomes with Revascularization and Stents in Acute Myocardial Infarction trial. Among 3,602 patients with STEMI, 108 patients (3.0%) had early VT/VF. Baseline clinical characteristics were similar in patients with versus without early VT/VF. Patients with early VT/VF had shorter symptom-to-balloon times and lower left ventricular ejection fraction and underwent more frequent thrombectomy compared with patients without early VT/VF. Adjusted 3-year rates of all-cause death (15.7% vs 6.5%; adjusted hazard ratio 2.62, 95% confidence interval 1.48 to 4.61, p <0.001) and stent thrombosis (13.7% vs 5.7%; adjusted hazard ratio 2.74, 95% confidence interval 1.52 to 4.93, p <0.001) were significantly higher in patients with early VT/VF compared with patients without early VT/VF. In conclusion, in the Harmonizing Outcomes with Revascularization and Stents in Acute Myocardial Infarction trial, VT/VF occurring before coronary angiography and revascularization in patients with STEMI was strongly associated with increased 3-year rates of death and stent thrombosis. Further investigation into the mechanisms underlying the increased risk of early stent thrombosis in patients with early VT/VF is required.

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