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. 1978 Jul 15;2(2):52-3.

Sinus Arrhythmia in Acute Myocardial Infarction

  • PMID: 713911

Sinus Arrhythmia in Acute Myocardial Infarction

M M Wolf et al. Med J Aust. .


Sinus arrhythmia, defined by means of a calculation of variance of the R-R interval on admission to hospital, was present in 73 of 176 patients admitted to a coronary care unit with acute myocardial infarction. These patients had a lower hospital mortality. They tended to have a higher incidence of inferior infarction, and a lower incidence of anterior infarction, and to have smaller infarcts as measured by the Norris index. The main difference between patients with sinus arrhythmia and without sinus arrhythmia related to heart rates on admission to hospital, the patients with the former having slower heart rates at that time.

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