The effects of cardiac arrest recognition by dispatcher on Smart Advanced Life Support

Choung Ah Lee, Gi Woon Kim, Yu Jin Kim, Hyung Jun Moon, Yong Jin Park, Kyoung Mi Lee, Jae Hyug Woo, Won Jung Jeong, Il Kug Choi, Han Joo Choi, Hyuk Joong Choi

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Objectives: The purpose of this study was to analyze the effect of cardiac arrest recognition by emergency medical dispatch on the pre-hospital advanced cardiac life support and to investigate the outcome of out-of-hospital cardiac arrest. Method: This study was conducted to evaluate the out-of-hospital cardiac arrest patients over 18 years of age, excluding trauma and poisoning patients, from 1 August 2015 to 31 July 2016. We investigated whether it was a cardiac-arrest recognition at dispatch. We compared the pre-hospital return of spontaneous circulation, the rate of survival admission and discharge, good neurological outcome, and also analyzed the time of securing vein, time of first epinephrine administration, and arrival time of paramedics. Results: A total of 3695 out-of-hospital cardiac arrest patients occurred during the study period, and 1468 patients were included in the study. Resuscitation rate by caller was significantly higher in the recognition group. The arrival interval between the first and second emergency service unit was shorter as 5.1 min on average, and the connection rate of paramedics and physicians before the arrival was 32.3%, which was significantly higher than that of the unrecognized group. The mean time required to first epinephrine administration was 13.1 min, which was significantly faster in the recognition group. However, there was no statistically significant difference between the two groups in patients with good neurological outcome, and rather the rate of return of spontaneous circulation and survival discharge was significantly higher in the non-recognition group. Conclusion: Although the recognition of cardiac arrest at dispatch does not directly affect survival rate and good neurological outcome, the activation of pre-hospital advanced cardiac life support and the shortening the time of epinephrine administration can increase pre-hospital return of spontaneous circulation. Therefore, effort to increase recognition by dispatcher is needed.

Original languageEnglish
Pages (from-to)286-292
Number of pages7
JournalHong Kong Journal of Emergency Medicine
Issue number5
StatePublished - 1 Sep 2020


  • Out-of-hospital cardiac arrest
  • advanced cardiac life support
  • emergency medical dispatch

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    Lee, C. A., Kim, G. W., Kim, Y. J., Moon, H. J., Park, Y. J., Lee, K. M., Woo, J. H., Jeong, W. J., Choi, I. K., Choi, H. J., & Choi, H. J. (2020). The effects of cardiac arrest recognition by dispatcher on Smart Advanced Life Support. Hong Kong Journal of Emergency Medicine, 27(5), 286-292.