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Relationship between chest compression rates and outcomes from cardiac arrest
Ahamed H Idris1, Danielle Guffey, Tom P Aufderheide
1Division of Emergency Medicine, University of Texas Southwestern Medical Center at Dallas, 5323 Harry Hines Blvd, Dallas, TX 75390-8579, USA. aidris@sbcglobal.net
Optimal chest compression rates for out-of-hospital cardiac arrest are near 125/min for return of spontaneous circulation. However, compression rate did not significantly impact survival to hospital discharge in these patients.
Area of Science:
- Emergency Medicine
- Cardiology
- Resuscitation Science
Background:
- Current cardiopulmonary resuscitation guidelines recommend at least 100 chest compressions per minute.
- Studies suggest optimal blood flow occurs at compression rates around 120/min.
- Limited data exist on compression rates during out-of-hospital cardiac arrest (OOHCA) and their impact on patient outcomes.
Purpose of the Study:
- To describe chest compression rates used by emergency medical services (EMS) during OOHCA resuscitation.
- To determine the relationship between chest compression rate and patient outcomes in OOHCA.
Main Methods:
- Analysis of data from monitor-defibrillator recordings during cardiopulmonary resuscitation for patients aged ≥20 years with OOHCA.
- Inclusion of 3098 patients from December 2005 to May 2007 within the Resuscitation Outcomes Consortium.
- Multivariable logistic regression and cubic spline models to assess the association between chest compression rate and outcomes.
Main Results:
- The mean chest compression rate was 112 ± 19/min.
- A curvilinear association was observed between compression rate and return of spontaneous circulation (ROSC), peaking around 125/min.
- No significant association was found between chest compression rate and survival to hospital discharge.
Conclusions:
- Chest compression rate is linked to the likelihood of achieving return of spontaneous circulation in OOHCA.
- Chest compression rate does not appear to influence survival to hospital discharge in OOHCA patients.
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