"The aim of this study was to investigate the factors related to the survival of victims with SCA (sudden cardiac arrest) from prehospital settings, who were transferred to hospitals by EMS (emergency medical services) squads due to OHCA (out-of-hospital cardiac arrest). Authors analyzed prehospital care report sheets data, which were prepared by EMS personnel regarding cardiac arrest victims in 1,810 cases who were transferred to hospital through 119 EMS squads in A areas from Jan 1, 2008 to Dec 31, 2008. Among 1,810 OHCA victims, the cases that were transferred to hospital with sustained ROSC (return of spontaneous circulation), which were classified into ""survival"", were 33 (1.8%). There was no statistically significant difference in the survival according to victims' gender, age, job and location of cardiac arrests. OHCA caused by presumed diseases, the cases of presumed cardiogenic cardiac arrests showed the highest survival rate (P=0.008). The survival rate was significantly high (P<0.001) in the case of ventricular fibrillation. In the case of defibrillation being performed, the survival rate was significantly higher (P<0.001) than being not done. And the survival rate was significantly affected (OR=1.021, 95% CI=1.004-1.031) by shortening the time gap from the occurrence of OHCA to call. The survival rate was significantly higher (OR=1.094, 95% CI=1.026-1.166) when the duration between cardiac arrest and CPR was shorter. Furthermore, the survival rate was significantly higher (OR=1.117, 95% CI=1.016-1.228) when the duration between OHCA and defibrillation was shorter. The results of multiple logistic regressions analysis on time variable, indicated that the duration between OHCA and defibrillation was significantly influenced upon victims' survival rate (OR=0.819, 95% CI=0.695-0.966). However, the execution of CPR by lay people from the scene did not affect on the victim's survival rate. In conclusion, it was suggested that expansion of PAD (public access defibrillation) program, provision of standardized education program of CPR, and performance of qualified CPR, were needed for the improvement of survival rate of OHCA victim.
Key words: Cardiac arrest, Out-of-hospital cardiac arrest, Survival"