Extreme heat triggers first-time acute myocardial infarction: Evidence from a case-crossover study in Tianjin, China.

ABSTRACT:

Objective

To assess whether extreme high temperatures (EHT) and heat waves (HW) are associated with acute myocardial infarction (AMI) risk, and to determine whether these effects differ between first-time and recurrent events.

Methods

We performed a time-stratified case-crossover study of 7573 AMI admissions in Tianjin, China (2021-2023). Meteorological exposures were derived from ground-based monitoring and satellite products. Conditional logistic regression with distributed lag nonlinear models quantified immediate and delayed associations between temperature and AMI, stratified by event type (first-time vs recurrent). Effect modification was examined by age, sex, and ST-segment elevation.

Results

Both EHT and HW were associated with increased AMI risk, with effects

SUBMITTER: Wang Z 

PROVIDER: S-EPMC12746277 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature