Khoury S, et al. - Researchers examined acute kidney injury (AKI) incidence in older adults ( ≥ 75 years) with ST-segment elevation myocardial infarction (STEMI) treated with primary percutaneous coronary intervention (PCI) and determined its prognostic implications. In this retrospective cohort, observational, single-center study of 416 older patients with STEMI (≥ 75 years) treated with primary PCI, 96 (23%) patients developed AKI. They observed adverse in-hospital outcomes, higher 30 days (25% vs 6%), and long-term mortality (46% vs 17%) in correlation to the occurrence of AKI. Recovery of renal function was reported in 46/96 (48%) patients at hospital discharge. They observed the occurrence of new or progression of baseline chronic kidney disease in correlation to lack of renal function recovery at discharge (50/96 patients; 52%).