Abstract 35: Clinical Characteristics and Outcomes of Out-of-Hospital Cardiac Arrest Patients in Areas of Tremendous Snowfall
Backgrounds: The snow removal is a hard work in the tremendous snowfall area. Because it is difficult to limit to light work in consideration for the physical condition, the heart attacks are often experienced during the snow removal. Little information is available with regard to the severe heart attacks such as out-of-hospital cardiac arrest (OHCA) during the snow removal. The purpose of this study was to evaluate the characteristics and clinical outcomes of OHCA patients in the tremendous snowfall area.
Methods: A prospective, nationwide, population-based registry of out-of-hospital cardiac arrests has been conducted by the Fire and Disaster Management Agency of Japan between January 2005 and December 2009. We enrolled all OHCA patients of presumed cardiac etiology. The tremendous snowfall area was defined as the prefectures including the city which five-year average annual cumulative snowfall depth was over 50 cm. We compared the clinical characteristics and the neurological outcomes between the tremendous snowfall area (group S) and the other area (group N).
Results: During the five years, 297,111 patients had OHCA of presumed cardiac etiology. Though the time interval from emergency call to arrival of emergency life-saving technician in group S was longer (7.36 min) than that in group N (7.12 min), the time intervals from emergency call to restoration of spontaneous circulation in group S (19.87 min) and group N (19.72 min) were the same. The one-month survival rate in group S (5.06%) was lower than group N (5.28 %). The favorable neurological recovery rates in group S (2.67 %) and group N (2.77 %) were the same. Comparing the monthly outcomes, the one-month survival rate in group S (6.03 %) was lower than that in group N (7.02 %) in June. Though the large number of OHCA was occurred, there were no significant differences in the one-month survival and favorable neurological recovery rates between two groups in winter.
Conclusion: This study suggested that tremendous snowfall didn’t affect the outcomes of OHCA patients much.
- © 2011 by American Heart Association, Inc.