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Intra-aortic balloon pumps (IABPs) are commonly used to reduce the likelihood of complications in stable high-risk patients undergoing percutaneous coronary intervention (PCI). Investigators for the randomized controlled Balloon Pump–Assisted Coronary Intervention Study evaluated this practice in 301 patients (mean age, 71; 80% men) with left ventricular (LV) ejection fractions of ≤30% and a large amount of myocardium at risk. The investigators excluded patients who fulfill American College of Cardiology/American Heart Association Class I and II recommendations for IABP use: cardiogenic shock, acute myocardial infarction (AMI) within 48 hours before scheduled PCI, or complications of AMI requiring circulatory support. The primary endpoint w…