Optimizing an Emergency Medical Dispatch System to Improve Prehospital Diagnosis and Treatment of Acute Coronary Syndrome: Nationwide Retrospective Study in China

Xuejie Dong   ^{1, 2} , MS ;   Fang Ding   ³ , MD ;   Shuduo Zhou   ^{1, 2} , MD, PhD ;   Junxiong Ma   ^{1, 2} , MS ;   Na Li   ^{1, 2} , MS ;   Mailikezhati Maimaitiming   ^{1, 2} , BS ;   Yawei Xu   ⁴ , MD, PhD ;   Zhigang Guo   ⁵ , MM ;   Shaobin Jia   ⁶ , MD, PhD ;   Chunjie Li   ⁵ , MD, PhD ;   Suxin Luo   ⁷ , MD, PhD ;   Huiping Bian   ⁸ , MD, PhD ;   Gesang Luobu   ⁹ , MD, PhD ;   Zuyi Yuan   ¹⁰ , MD, PhD ;   Hong Shi   ¹¹ , MM ;   Zhi-jie Zheng   ^{1, 2} , MD, PhD ;   Yinzi Jin   ^{1, 2 *} , PhD ;   Yong Huo   ^{12 *} , MD, PhD

¹ Department of Global Health, School of Public Health, Peking University, Beijing, China

² Institute for Global Health and Development, Peking University, Beijing, China

³ Emergency Medical Dispatcher Industries, Beijing, China

⁴ Department of Cardiology, Shanghai Tenth People’s Hospital, Shanghai, China

⁵ Department of Cardiology Surgery, Tianjin Chest Hospital, Tianjin, China

⁶ Department of Cardiology, General Hospital of Ningxia Medical University, Ningxia, China

⁷ Department of Cardiology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China

⁸ Department of Cardiology, Qinghai Province Cardio-cerebrovascular Disease Specialist Hospital, Xining, China

⁹ Department of Cardiology, Tibet Autonomous Region People's Hospital, Lasa, China

¹⁰ Department of Cardiology, The First Affiliated Hospital of Xi’an Jiaotong University, Xi'an, China

¹¹ Chinese Medical Association, Beijing, China

¹² Department of Cardiology, Peking University First Hospital, Beijing, China

*these authors contributed equally