Effect of temperature fluctuations in cold seasons on acute myocardial infarction hospitalisations in northeast China: a retrospective observational cohort study.

A highly significant linear correlation was observed between the daily maximum and daily minimum temperatures (y=0.98x+10.26, R 2 =0.957, p<0.001, online supplemental figure 2 ).

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6 7 In the past decade, despite improvements in coronary risk factors, the incidence of AMI in China continues to exhibit an increasing trend. 2 On the other hand, factors such as anger, influenza and ambient temperature can trigger plaque rupture, thrombosis, myocardial ischaemia and even sudden death. 8 9 Furthermore, ambient temperature increased the emergency hospitalisation rate of AMI by influencing the key risks of coronary athero

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