We measured body temperature in 40 consecutive patients treated for a first ST elevation acute myocardial infarction(AMI) with primary percutaneous coronary interventions. Left ventricular function was assessed by echocardiography, and blood samples were drawn for highly sensitive C-reactive protein(hs-CRP), white blood cell(WBC) count, fibrinogen, creatine kinase(CK), and cardiac troponin I levels(cTnI). The median(25th, 75th quartiles) peak 24-hour temperature was 37.4℃(36.9℃, 37.6℃).Variables significantly associated with peak 24-hour temperature were CK(p=0.01, r=0.42), wall motion index(p=0.01, r=0.41), hs-CRP(p=0.01, r= 0.41), and cTnI(p=0.03, r=0.35). There was no significant correlation between peak 24-hour temperature and WBC count(p=0.39, r=0.14) and fibrinogen(p=0.12, r=0.21). Thus, peak 24-hour body temperature after ST elevation AMI probably reflects infarct size rather than a nonspecific inflammatory response.
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