Comparison of direct stenting with conventional stent implantation in acute myocardial infarction |
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| Authors: | Möckel Martin Vollert Jörn Lansky Alexandra J Witzenbichler Bernhard Guagliumi Giulio Peruga Jan Z Brodie Bruce R Kornowski Ran Dudek Dariusz Farkouh Michael E Parise Helen Mehran Roxana Stone Gregg W;Horizons-AMI Trial Investigators |
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| Institution: | aCharite Campus Virchow-Klinikum, Berlin, Germany;bColumbia University Medical Center/New York-Presbyterian Hospital and the Cardiovascular Research Foundation, New York, New York;cCharité Campus Benjamin Franklin, Berlin, Germany;dOspedali Riuniti di Bergamo, Bergamo, Italy;eSilesian Center for Heart Disease, Lodz, Poland;fLeBauer Cardiovascular Research Foundation and Moses Cone Hospital, Greensboro, North Carolina;gTel Aviv University and Rabin Medical Center, Petach Tikva, Israel;hJagiellonian University, Krakow, Poland;iMount Sinai School of Medicine, New York, New York |
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| Abstract: | Small studies have suggested that direct stenting without balloon predilatation in ST-segment elevation myocardial infarction may reduce microcirculatory dysfunction. To examine the clinical benefits of direct stenting in a large cohort of patients who underwent primary percutaneous coronary intervention treated with contemporary pharmacotherapy, the 1-year outcomes from the multicenter, randomized Harmonizing Outcomes With Revascularization and Stents in Acute Myocardial Infarction (HORIZONS-AMI) trial were analyzed. A total of 3,602 patients with ST-segment elevation myocardial infarction who underwent primary percutaneous coronary intervention were enrolled. The present study cohort consisted of 2,528 patients in whom single lesions (excluding bypass grafts) were treated with stent implantation. At operator discretion, direct stenting was attempted in 698 patients (27.6%), and stenting was performed after predilatation in 1,830 patients (72.4%). Propensity-score matching was performed to reduce bias. Direct stenting was successful in 677 patients (97.0%). ST-segment resolution at 60 minutes after the procedure was improved in patients who underwent direct compared to conventional stenting (median 74.8% vs 68.9%, respectively, p = 0.01). At 1-year follow-up, direct compared to conventional stenting was associated with a significantly lower rate of all-cause death (1.6% vs 3.8%, p = 0.01) and stroke (0.3% vs 1.1%, p = 0.049), with nonsignificant differences in target lesion revascularization, myocardial infarction, stent thrombosis, and major bleeding. Death at 1 year remained significantly lower in the direct stenting group after multivariate adjustment (hazard ratio 0.42, 95% confidence interval 0.21 to 0.86, p = 0.02) and in a propensity score-based analysis (hazard ratio 0.92, 95% confidence interval 0.88 to 0.95, p = 0.02). In conclusion, compared to stent implantation after predilatation, direct stenting is safe and effective in appropriately selected lesions in patients with ST-segment elevation myocardial infarction who undergo primary percutaneous coronary intervention and may result in improved survival. |
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