Heat and risk of myocardial infarction: hourly level case- crossover analysis of MINAP database.

The article summarizes a study evaluating the relation between high ambient temperatures with the changes in the risk of myocardial infarction on an hourly timescale. Paper-adds including data at an hourly temporal resolution from 11 conurbations in England and Wales showed that higher temperatures were associated with increased risk of myocardial infarction, with reductions in risk at longer lags being consistent with heat, in the six hours after exposure, above a threshold of 20°C.