Why the study?
Temporal trends in the incidence and mortality of acute myocardial infarction have not been fully clarified in Japan.
Between 2006 and 2016 in Tokyo, the incidence of AMI remained steady while in-hospital mortality slightly decreased, likely reflecting the establishment of primary PCI.
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Stable AMI incidence with modest mortality decline; extends Japanese trends but hypothesis-generating and should not change practice.
BACKGROUND: Temporal trends in the incidence and mortality of acute myocardial infarction (AMI) have not been fully clarified in Japan. METHODS AND RESULTS: The Tokyo CCU network collects information every 3 months regarding the number of AMI cases, age of patients and in-hospital mortality. Age-adjusted hospitalized AMI numbers were unchanged from 2006 to 2016 (40.7/100,000 persons/year in 2016). Annual age-adjusted in-hospital mortality decreased slightly (5.8% in 2006 to 5.2% in 2016). CONCLUSIONS: A steady trend of AMI incidence was observed over the past 11 years in the Tokyo metropolitan area. In-hospital mortality decreased slightly but significantly, with the establishment of primary percutaneous coronary intervention.
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Yamamoto et al. (2019) studied this question.
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