Abstract 14559: Monthly and Seasonal Variation in Sudden Cardiac Arrest Utstein Registry Study in Japan
Background : Previous studies have demonstrated seasonal variation in the incidence of acute myocardial infarction (AMI) with an increase in cases during the winter months. However, some studies showed negative association. We, therefore, examined seasonal variation in sudden cardiac arrest using 4 years of data from national database of cardiac arrest , the All-Japan Utstein Registry of the FDMA
Method: From January 1, 2005, through December 31, 2008, we conducted a prospective, population-based, observational study involving consecutive patients across Japan who had an out-of-hospital cardiac arrest and in whom resuscitation was attempted by emergency responders. Incidence rate ratio of fatal cardiac arrest and 95% Confidence Interval was calculated by monthly period.
Result : A total of 431,844 adults who had an out-of-hospital cardiac arrest were included in this study; The incidence rates was highest in January and lowest with June.( 9.75 and 5.53, respectively). The incidence rate ratio of sudden cardiac arrest is 1.76(95%CI , 1.74-1.75, p<0.0001) This increasing relationship showed linear trend (P<0.0001 for trend. Fig1). These associations were robust after adjusting for age and sex. The resuscitation rate and 1 month survival showed no significant difference.
Conclusion: Large population based registry showed monthly and seasonal variation in cardiac arrest. The risk of cardiac arrest is highest in winter and lower in mild climate season.
- © 2011 by American Heart Association, Inc.