Higher chances of survival from cardiac arrest during day time

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Washington, Feb 24 (UNI) Hospitalised patients who experience cardiac arrest during the day on weekdays have a greater chance of survival than these who experience it at night or on weekends, a new study says.

The chances of survival from a heart attack occurring during the day on weekdays are higher because detection and treatment are more effective due to the response factor of both patient and hospital staff, a study by researchers of Virginia Commonwealth University said.

The study published in the February issue of the Journal of the American Medical Association (JAMA) obtained data on 86,748 cardiac arrest patients in hospitals participating in the American Heart Association's National Registry of CardioPulmonary Resuscitation.

The researchers examined survival from cardiac arrest in hourly time segments, defining day and evening as 0700 hrs to 2259 hrs, and night was as 2300 hrs to 0659 hrs. A weekend started at 2300 hrs on a Friday and finished at 0659 hrs on a Monday.

A total of 58,593 cases of in-hospital cardiac arrest occurred during day hours, including 15,110 on weekends, and 28,155 cases occurred during night hours, including 7,790 on weekends.

It was found that rates of survival to discharge, return of spontaneous circulation for longer than 20 minutes, survival at 24 hours and favorable neurological outcomes were substantially lower during the night compared with day.

Survival to discharge at night was similar during the week and weekends, while it was higher during day on weekdays than on weekends.

''The mechanism for the decreased survival during the night is likely multifactorial, potentially including biological differences in patients as well as health care staff and hospital staffing and operational factors,'' the authors said.

The researchers opined that this study could have important implications for hospital staff, training, care delivery processes and equipment decisions.

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