Impact of Updating the Cardiopulmonary Resuscitation Guidelines on Out-of-Hospital Shockable Cardiac Arrest: A...

Area of Science:

• Emergency Medicine
• Cardiovascular Science
• Public Health

Background:

• International consensus on cardiopulmonary resuscitation (CPR) and emergency cardiovascular care science and treatment recommendations (CoSTR) are updated every five years.
• Few population-based studies have assessed the effectiveness of CPR guideline updates for out-of-hospital cardiac arrest (OHCA) with shockable rhythms.
• The study investigates the impact of CPR guidelines from 2000, 2005 (CoSTR), and 2010 (CoSTR) on OHCA outcomes in Japan.

Purpose of the Study:

• To determine if CPR based on CoSTR 2005 or 2010 guidelines was associated with improved outcomes in Japan compared to Guidelines 2000.
• To evaluate the effectiveness of updated CPR maneuvers on neurologically intact survival rates for OHCA patients.

Main Methods:

• Analysis of 73,578 adult patients with shockable OHCA from the All-Japan Utstein Registry (2005-2015).
• Comparison of outcomes across three eras: Guidelines 2000 (2005), CoSTR 2005 (2006-2010), and CoSTR 2010 (2011-2015).
• Outcomes assessed included favorable neurological outcomes at 30 days post-OHCA, stratified by witness (bystander or EMS responder) and subgroups.

Main Results:

• In bystander-witnessed OHCA, adjusted odds ratios for favorable neurological outcomes at 30 days increased annually from 1.19 in 2006 to 3.01 in 2015.
• Similar positive trends in neurological outcomes were observed in the EMS responder-witnessed group and various subgroups.
• The study demonstrates a consistent year-over-year improvement in outcomes associated with later CPR guidelines.

Conclusions:

• CPR maneuver updates in CoSTR 2005 and 2010 were associated with improved neurologically intact survival for shockable OHCA in Japan compared to Guidelines 2000.
• The observed improvements suggest that updated CPR guidelines positively impact patient survival.
• Increased public awareness and broader dissemination of basic life support (BLS) are potential contributing factors to the improved outcomes.