• Hiroshi Sekiguchi, Tatsuma Fukuda, Yuichiro Tamaki, Kazuhiko Hanashiro, Kenichi Satoh, Eiichi Ueno, and Ichiro Kukita.
• Department of Critical Care and Emergency Medicine, Graduate School of Medicine, University of the Ryukyus, Okinawa, Japan. Electronic address: hiroshis@med.u-ryukyu.ac.jp.
• Am J Emerg Med. 2020 Jul 1; 38 (7): 1436-1440.

IntroductionCardiopulmonary resuscitation (CPR) guidelines have been updated every 5 years since 2000. Significant changes have been made in each update, and every time a guideline is changed, the instructors of each country that ratify the American Heart Association (AHA) must review the contents of the revised guideline to understand the changes made in the concept of CPR. The purpose of this study was to use a computerized data mining method to identify and characterize the changes in the key concepts of the AHA-Basic Life Support (BLS) updates between 2000 and 2015.MethodsWe analyzed the guidelines of the AHA-BLS provider manual of 2000, 2005, 2010, and 2015 using a computerized data mining method and attempted to identify the changes in keywords along with changes in the guideline.ResultsIn particular, the 2000 guideline has focused on the detailed BLS technique of an individual health care provider, whereas the 2005 and 2010 guidelines have focused on changing the ratio of chest compressions and breathing and changing the BLS sequence, respectively. In the most recent 2015 guideline, the CPR team was the central topic. We observed that as the guidelines were updated over the years, keywords related to CPR and automated external defibrillators (AED) associated with co-occurrence network continued to appear.ConclusionsAnalysis revealed that keywords related to CPR and AED associated with the co-occurrence network continued to appear. We believe that the results of this study will ultimately contribute to optimizing AHA's educational strategies for health care providers.Copyright © 2019 Elsevier Inc. All rights reserved.

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