Effect of vest cardiopulmonary resuscitation rate on cardiac output and coronary blood flow.
We studied the effect of CPR rate on the hemodynamic indices of surgically instrumented canine experimental models. Using pneumatic vest CPR, we applied simultaneous rib cage and abdominal compressions at rates of 1 to 12 Hz. CPR with 2-Hz frequency yielded the highest aortic and coronary flows (252 +/- 14 and 6.8 +/- 1.1 ml/min vs. 178 + 12 and 0.96 +/- 0.08 ml/min at 1 Hz, respectively; p less than .005). The validity of the present American Heart Association recommendation for 1-Hz CPR rate would benefit from further studies.
Ben-Haim
S A
SA
Cardiovascular Research Group, Rappaport Institute for Research in the Medical Sciences, Haifa, Israel.
Shofti
R
R
Ostrow
B
B
Dinnar
U
U
D000818:Animals; D002302:Cardiac Output; D003326:Coronary Circulation; D004285:Dogs; D012151:Resuscitation / Q000295:instrumentation / Q000379:methods*