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| Characteristics and pre-hospital delay among patients who call for emergency medical services due to chest pain |
| Wu Man-yan, Huang Wen-feng, Li Zhong-you, Song Jun-xian, Li Su-fang, Cui Yu-xia, Chen Hong |
| Department of Cardiology, Peking University People′s Hospital, Beijing 100044, China |
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Abstract Objective To explore the characteristics and pre-hospital delay in patients who dial for emergency medical services (EMS) due to chest pain. Methods Patients with acute chest pain dialing for EMS in Beijing were consecutively enrolled between January 1, 2014 and December 31, 2015. Data was collected through consulting the fully intelligent digital command platform of EMS dispatching center, including demographic characteristics, the disease spot, time of dialing for EMS and key time points of pre-hospital care. Pre-hospital delay was composed of patients delay and EMS transport delay. Results A total of 28090 patients with acute chest pain called for EMS in Beijing, accounted for 4.7 percent of all EMS calls, and the number of patients calls for EMS increased with age. Among the patients calling for EMS, 72% were located in the urban area, and most of patients made a call during winter, working day, morning and evening. The median pre-hospital delay was 180（113, 720）min, of which the median patient delay was 96 (24, 662) min, and the median EMS transport delay was 78 (58, 101) min, respectively accounting for 53.1% and 46.9% of the pre-hospital delay. While traffic time was the major part of EMS transport delay. Conclusion Patients with acute chest pain dial for EMS with regional differences and time rhythm, and patient delay and traffic delay are the main factors affecting pre-hospital care, suggesting that strengthening patient education and improving traffic conditions may reduce the pre-hospital delay to a certain extent.
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