Abstract 15801: Assessing Quality of Bystander Chest Compression and Shock Delivery by Electrocardiogram Signals From Public Automated External Defibrillators in Taiwan

• Published in: Circulation (New York, N.Y.) N.Y.), 2016-11, Vol.134 (Suppl_1 Suppl 1), p.A15801-A15801
• Main Authors: Lin, Hao-Yang, Wang, Hui-Chih, Chu, Hsin-Lan, Hsu, Shu-Hsien, Chen, Weiting, Cheng, Nai-Wen, Huang, Edward P, Ma, Matthew H, Sun, Jen-Tang, Chong, Wah-Sheng, Hsieh, Ming-Ju, Yang, Chih-Wei, Chong, Kah-Meng, Lin, Chih-Hao, Hsu, Si-Wen, Kuo, Chan-Wei
• Format: Article
• Language: English
• ISSN: 0009-7322; 1524-4539

Assessing Quality of Bystander Chest Compression and Shock Delivery by Electrocardiogram Signals from Public Automated External Defibrillators in TaiwanBackgroundBystander-initiated cardiopulmonary resuscitation (B-CPR) is pivotal in the community chain of survival, but the quality of B-CPR in the community is scarcely reported. Since 2013, certain public locations have been required by law to install public automated external defibrillators (AED) in Taiwan, with a compulsory registry of devices. Incident reports along with uploeded electrocardiogram records were also required once public AED was used.MethodWe analyzed AED records operated by bystanders for cardiac-arrest patients in public locations. Initial rhythms, timeliness of device operation, shock success, and minute-by-minute assessment of quality of chest compressions up to 5 minutes were reviewed. Chest compressions were registered by reviewing deflections on electrocardiogram signals.ResultsFrom Sep. 1, 2013 to Mar. 31, 2015, a total of 70 AED records were reviewed, and 20 (28.6%) presented with shockable rhythm initially. Among shockable cases, first shock was delivered 7 (±3) seconds after device voice prompt. All were successfully defibrillated with the first attempt. Bystander chest compressions were observed in 51 (72.9%) cases. In the first 5 minutes, the average ratio of hands-off-time was 39.7% (±21.8%), the average number of compression per minute were 74(±15.9), and the average rate of compression was 127(±37.4). Quality of chest compression deteriorated after the third minute, with ratio of hands-off time increased from 33.0% to 43.0%.ConclusionsBystanders delivered a first shock in a timely manner following device prompt, but quality of chest compressions were suboptimal and deteriorated rapidly over time. Measures should be taken to assess and to improve B-CPR quality.