The time of sunrise and the number of hours with daylight may influence the diurnal rhythm of acute heart attack mortality

Ildikó Kriszbacher, József Bódis, I. Boncz, Ágnes Koppan, M. Koppán

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

We investigated whether the time of sunrise and the number of daylight hours have an effect on the seasonality, or the daily rhythm of heart attack mortality. We analyzed retrospectively data of patients admitted to hospitals with the diagnosis of heart attack (n = 32,329) and patients who deceased of a heart attack (n = 5142) between January 1, 2004 and December 31, 2005 in Hungary. Heart attack mortality was highest during winter, while lowest number of events was recorded during summer . The daily peak of diurnality was between 6:00 am and 12:00 pm (33.77%). A positive correlation was found between the time of sunrise, time of sunset and the mortality caused by myocardial infarction (p <0,01). In the analysis of the number of daylight hours and the heart attack mortality we found a negative correlation (r = - 0.105, p <0.05). No significant difference was found between sexes and different age-groups in heart attack mortality. Our data suggest, that the occurrence and the mortality of heart attack may be related to the time of sunrise and the number of daylight hours.

Original languageEnglish
Pages (from-to)118-120
Number of pages3
JournalInternational Journal of Cardiology
Volume140
Issue number1
DOIs
Publication statusPublished - Apr 1 2010

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Circadian Rhythm
Myocardial Infarction
Mortality
Hungary
Age Groups

Keywords

  • Diurnal rhythm
  • Heart attack
  • Mortality
  • Number of hours of daylight
  • Seasonality
  • Time of sunrise

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine

Cite this

The time of sunrise and the number of hours with daylight may influence the diurnal rhythm of acute heart attack mortality. / Kriszbacher, Ildikó; Bódis, József; Boncz, I.; Koppan, Ágnes; Koppán, M.

In: International Journal of Cardiology, Vol. 140, No. 1, 01.04.2010, p. 118-120.

Research output: Contribution to journalArticle

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