A sternal accelerometer does not impair hemodynamics during piglet CPR

Mathias Zuercher, Ronald W. Hilwig, Mike Gura, Jon Nysaether, Vinay M. Nadkarni, Marc D. Berg, Karl B. Kern, Robert A. Berg

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


Aim: To determine whether the residual weight of a 260. g sternal accelerometer/force feedback device (AFFD) adversely affects hemodynamics during cardiopulmonary resuscitation in a piglet model of ventricular fibrillation cardiac arrest. Methods: After induction of ventricular fibrillation, cardiopulmonary resuscitation was provided to ten piglets (10.8 ± 1.9. kg) for 12. min while maintaining aortic systolic pressure of 80-90. mmHg during four 3-min periods with or without an AFFD on the chest. Cardiac output and left ventricular myocardial blood flow were determined by neutron-microsphere technique. Results: Using a linear mixed-effect model with residual maximum likelihood estimation to control for changes in cardiopulmonary resuscitation hemodynamics over time, cardiac output and myocardial blood flow did not differ with AFFD versus without AFFD. During the first 6. min, mean (±SEM) cardiac outputs were 0.42 (±0.05). L/min with AFFD versus 0.31 (±0.04). L/min without AFFD, and median left ventricular myocardial blood flows were 40.5 (±7.3). mL/min/100. g with AFFD versus 40.4 (±5.0). mL/min/100. g without AFFD. The mean right atrial diastolic pressures and coronary perfusion pressures were also not different (8 ± 0.7. mmHg versus 8 ± 0.9. mmHg and 16 ± 2. mmHg versus 16 ± 2. mmHg, respectively, during the first 6. min of CPR). Conclusion: The use of a 260. g accelerometer/force feedback device designed for real-time feedback to the rescuer during resuscitation efforts did not adversely affect cardiac output or left ventricular myocardial blood flow during 12. min of chest compressions in a piglet model of ventricular fibrillation cardiac arrest.

Original languageEnglish (US)
Pages (from-to)1231-1234
Number of pages4
Issue number9
StatePublished - Sep 2011


  • CPR
  • CPR quality
  • Cardiac arrest
  • Chest compressions
  • Leaning
  • Pediatric
  • Swine

ASJC Scopus subject areas

  • Emergency Medicine
  • Emergency
  • Cardiology and Cardiovascular Medicine


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