BACKGROUND: Several studies have reported circadian, weekly, and seasonal variations in the rates of out-of-hospital cardiac arrest (OHCA). However, variations in the mortality of OHCA are not well known. METHODS AND RESULTS: We investigated the 1396 consecutive cases of OHCA with cardiac etiology between October 2004 and September 2008. There were 2 peaks in the occurrence of OHCA in early morning and late evening. There was a weekly pattern with an increased incidence on Mondays. We found a significant seasonal variation in the frequency of events, with a maximum during winter. There was a trend of reduced mortality in warmest 3 months, especially among a subgroup of ventricular fibrillation/pulseless ventricular tachycardia with arrest witnessed. CONCLUSION: The present analyses demonstrated circadian, weekly and seasonal variations in the occurrence, and a seasonal variation in mortality in OHCA. Changes in temperature might influence the severity of OHCA and change the rate of success of cardiopulmonary resuscitation.
BACKGROUND: Several studies have reported circadian, weekly, and seasonal variations in the rates of out-of-hospital cardiac arrest (OHCA). However, variations in the mortality of OHCA are not well known. METHODS AND RESULTS: We investigated the 1396 consecutive cases of OHCA with cardiac etiology between October 2004 and September 2008. There were 2 peaks in the occurrence of OHCA in early morning and late evening. There was a weekly pattern with an increased incidence on Mondays. We found a significant seasonal variation in the frequency of events, with a maximum during winter. There was a trend of reduced mortality in warmest 3 months, especially among a subgroup of ventricular fibrillation/pulseless ventricular tachycardia with arrest witnessed. CONCLUSION: The present analyses demonstrated circadian, weekly and seasonal variations in the occurrence, and a seasonal variation in mortality in OHCA. Changes in temperature might influence the severity of OHCA and change the rate of success of cardiopulmonary resuscitation.
Authors: Abdullah Mohammed Kaki; Kamal Waheeb Alghalayini; Mohamed Nabil Alama; Adnan Abdullah Almazroaa; Norah Abdullah A Khathlan; Hassan Sembawa; Beena M Ouseph Journal: Saudi J Anaesth Date: 2017 Oct-Dec
Authors: Dae Kon Kim; Sang Do Shin; Young Sun Ro; Kyoung Jun Song; Ki Jeong Hong; So Yeon Joyce Kong Journal: PLoS One Date: 2020-05-15 Impact factor: 3.240