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Time of sunrise and hours with daylight may have an effect on the seasonality and diurnal variation of heart attack.
Chin Med J (Engl). 2009 Sep 20; 122(18):2107-10.CM

Abstract

BACKGROUND

The time of onset of myocardial infarction shows seasonal and daily variation. We aimed to investigate whether the number of hours with daylight has an effect on the seasonal variation of heart attack, and whether the time of sunrise has an effect on the diurnal rhythm of myocardial infarction.

METHODS

We carried out a retrospective database study covering all patients admitted to any acute care hospital with the diagnosis of myocardial infarction in Hungary between January 2004 and December 2005 (n = 32 329). Data were collected from the National Health Insurance Fund Administration (OEP) according to the International Classification of Diseases (ICD I21, I22) and National Meteorology Service (OMSZ). In case of patients who occurred in the database several times the events have been considered as a separate case.

RESULTS

With consideration to seasonal variation, the peak period of heart attack was found in the spring, with the lowest number of events in the summer. The number of hours with daylight showed a weak negative correlation with the occurrence of myocardial infarction (r = -0.108, P < 0.05). With respect to diurnal variation, the peak period of daily events was between 6-12 in the morning (35.57%). We have found a positive correlation between the time of sunrise and sunset and the occurrence of myocardial infarction (P < 0.01).

CONCLUSION

Based on our findings, the number of hours with daylight and the time of sunrise may be connected with the chances of having heart attack; however other factors, such as high blood pressure, diabetes or smoking may also have an influence.

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Authors+Show Affiliations

Bodis J
Institute of Nursing and Clinical Sciences, Faculty of Health Sciences, University of Pécs, Pécs, Hungary.
Koppan M
No affiliation info available
Boncz I
No affiliation info available
Kriszbacher I
No affiliation info available

MeSH

Circadian RhythmFemaleHumansMaleMiddle AgedMyocardial InfarctionSeasonsTime Factors

Pub Type(s)

Journal Article

Language

eng

PubMed ID

19781293

Citation

Bodis, Jozsef, et al. "Time of Sunrise and Hours With Daylight May Have an Effect On the Seasonality and Diurnal Variation of Heart Attack." Chinese Medical Journal, vol. 122, no. 18, 2009, pp. 2107-10.
Bodis J, Koppan M, Boncz I, et al. Time of sunrise and hours with daylight may have an effect on the seasonality and diurnal variation of heart attack. Chin Med J (Engl). 2009;122(18):2107-10.
Bodis, J., Koppan, M., Boncz, I., & Kriszbacher, I. (2009). Time of sunrise and hours with daylight may have an effect on the seasonality and diurnal variation of heart attack. Chinese Medical Journal, 122(18), 2107-10.
Bodis J, et al. Time of Sunrise and Hours With Daylight May Have an Effect On the Seasonality and Diurnal Variation of Heart Attack. Chin Med J (Engl). 2009 Sep 20;122(18):2107-10. PubMed PMID: 19781293.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Time of sunrise and hours with daylight may have an effect on the seasonality and diurnal variation of heart attack. AU - Bodis,Jozsef, AU - Koppan,Miklos, AU - Boncz,Imre, AU - Kriszbacher,Ildiko, PY - 2009/9/29/entrez PY - 2009/9/29/pubmed PY - 2010/2/5/medline SP - 2107 EP - 10 JF - Chinese medical journal JO - Chin Med J (Engl) VL - 122 IS - 18 N2 - BACKGROUND: The time of onset of myocardial infarction shows seasonal and daily variation. We aimed to investigate whether the number of hours with daylight has an effect on the seasonal variation of heart attack, and whether the time of sunrise has an effect on the diurnal rhythm of myocardial infarction. METHODS: We carried out a retrospective database study covering all patients admitted to any acute care hospital with the diagnosis of myocardial infarction in Hungary between January 2004 and December 2005 (n = 32 329). Data were collected from the National Health Insurance Fund Administration (OEP) according to the International Classification of Diseases (ICD I21, I22) and National Meteorology Service (OMSZ). In case of patients who occurred in the database several times the events have been considered as a separate case. RESULTS: With consideration to seasonal variation, the peak period of heart attack was found in the spring, with the lowest number of events in the summer. The number of hours with daylight showed a weak negative correlation with the occurrence of myocardial infarction (r = -0.108, P < 0.05). With respect to diurnal variation, the peak period of daily events was between 6-12 in the morning (35.57%). We have found a positive correlation between the time of sunrise and sunset and the occurrence of myocardial infarction (P < 0.01). CONCLUSION: Based on our findings, the number of hours with daylight and the time of sunrise may be connected with the chances of having heart attack; however other factors, such as high blood pressure, diabetes or smoking may also have an influence. SN - 2542-5641 UR - https://www.unboundmedicine.com/medline/citation/19781293/Time_of_sunrise_and_hours_with_daylight_may_have_an_effect_on_the_seasonality_and_diurnal_variation_of_heart_attack_ L2 - https://Insights.ovid.com/pubmed?pmid=19781293 DB - PRIME DP - Unbound Medicine ER -