Coronary perfusion pressure (CPP), also known as simply perfusion pressure, refers to the pressure gradient that drives coronary blood pressure, meaning the difference between the diastolic aortic pressure and the left ventricular end diastolic pressure. Sufficient CPP to provide myocardial reperfusion is required for defibrillation success after prolonged ventricular fibrillation (VF) cardiac arrest. However, when chest compression interruptions occur during cardiopulmonary resuscitation (CPR), there is a precipitous and sustained loss of CPP. The purpose of this study was to quantify the extent to which CPP recovers to pre-pause levels following chest compression interruptions. This was a secondary analysis of prospectively collected data from two similar IACUC approved protocols. Animal handling and all surgical procedures were in strict compliance with the NIH Guide for the Care and Use of Animals. Both studies were conducted in our USDA-certified laboratory. A total of 105 fe
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