Abstract 246: Chest Compression Rates Used During Out-of-Hospital Cardiopulmonary Resuscitation in Nine Resuscitation Outcomes Consortium Regional Sites
Background: The current American Heart Association guidelines for cardiopulmonary resuscitation (CPR) recommend using a chest compression rate of 100 compressions/min. Some animal models of CPR have reported improved outcomes associated with chest compressions rates > 120/min. Few studies have reported the distribution of actual chest compression rates used to resuscitate patients with out-of-hospital cardiac arrest, or the relationship between rate and outcome.
Objective: To describe the rate and range of chest compressions used by emergency medical services (EMS) providers including firefighters and paramedics to resuscitate patients with out-of-hospital cardiac arrest.
Methods: Included were adult patients who had out-of-hospital cardiac arrest treated by EMS providers in six US (Dallas; Iowa; Milwaukee; Pittsburgh; Portland, OR; and Seattle/King County) and three Canadian (Ottawa; Toronto; and Vancouver, BC) regional sites participating in the Resuscitation Outcomes Consortium (ROC). Monitor-defibrillators recorded chest compression rates during the first 5 minutes of CPR. The electronic recordings were reviewed for accuracy and abstracted data were entered into the ROC database.
Results: 3,131 patients had out-of-hospital cardiac arrest from December 2005 to May 2007. Mean (±SD) age was 66.6 ± 16. Mean chest compression rate was 112 ± 19 compressions/min (23 – 202) (median 111, IQR 100 – 123) during the first 5 minutes of CPR (Table). Mean within subject variability of compression rate from minute to minute was 8 ± 8 (IQR 3 – 9) compressions/min (N = 3,006).
Conclusions: Higher than recommended chest compression rates during out-of-hospital CPR are common in 8 of 9 regional sites in the ROC. This study shows that chest compression rates higher than 100/min are common in clinical practice. Further analysis is underway on the relationship between chest compression rate and survival from out-of-hospital cardiac arrest.
- © 2010 by American Heart Association, Inc.