engleski

Infarct site related differences in heart rate variability persist after acute phase of myocardial infarction

Patients with acute myocardial infarction (MI)had a lower overall heart rate variability (HRV) and a faster heart rate than those with acute inferior MI. Data about infarct site related differences in HRV are insufficient for the period following acute phase of MI. The study included 221 consecutive patients with 4 weeks to 3 months old MI. HRV was analysed from 24-hours Holter ECG. Patients with two months old anterior MI (mean 66+/-23 days)had a lower overall HRV (SDNN=116+/-35 vs. 132+/-37 ms, p=0.001) and a faster heart rate (mean RR=849+/-113 vs. 887+/-117 ms, p=0.02) than those with inferior MI. In conclusion, infarct size related differences in HRV persist after acute phase of MI. These findings might partialy explain a higher late mortality rate in patients who had anterior MI and implicate necessity for a screening HRV in patients after acute phase of MI.

myocardial infarction; heart rate; autonomic nervous system

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