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Thrombus aspiration before primary percutaneous coronary intervention (PCI) for ST-segment-elevation myocardial infarction (STEMI) has intuitive appeal. That has prompted several randomized trials of the approach, most of them small and with conflicting results. Now, in a large registry-based trial, 7244 patients (about 60% of the STEMI patients at all 29 centers in Sweden, plus one center each in Denmark and Iceland) were randomized to undergo pre-PCI manual thrombus aspiration or PCI alone.
All-cause mortality at 30 days, the primary endpoint, was similar in the two groups: 2.8% for thrombus aspiration and 3.0% for PCI alone (hazard ratio, 0.94; 95% confidence interval, 0.72–1.22; P=0.63). This difference remained nonsignificant after acco…