Background: Temporal trends in the prevalence and outcomes of geriatric patients with acute myocardial infarction (AMI) complicated with heart failure (HF) remain to be elucidated. Methods and Results: We analyzed 6,648 consecutive AMI patients aged ≥70 years [70s (n = 3,576), 80s (n = 2,564), and ≥90 years (n = 508)] registered in our Miyagi AMI Registry between 2004 and 2015. Performance rate of primary percutaneous coronary intervention (PCI) significantly increased during the period in most age groups of both sexes (Figure A). Meanwhile, the prevalence of HF with Killip class ≥2 on admission also increased (Figure B), and in-hospital mortality remained unchanged regardless of age or sex (Figure C). Conclusions: Among geriatric AMI patients, the prevalence of HF has increased despite the increased PCI rate, which may result in the unchanged in-hospital mortality in Japan.
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