Abstract
Earlier studies demonstrated that hypertonic buffer agents administered during cardiopulmonary resuscitation (CPR) altered neither myocardial pH nor cardiac resuscitability. The rationale for the routine use of buffer agents for CPR has therefore been challenged. However, when these buffer agents are administered during CPR, they may have favorable effects on the postresuscitation course. Postresuscitation myocardial dysfunction has more recently emerged as a potentially fatal complication after successful cardiac resuscitation. Options for prevention and management of this complication have prompted the present studies, in which the effects of buffer agents administered during CPR are evaluated as to their effects on postresuscitation myocardial function and survival. Prospective, randomized, controlled animal study. University animal laboratory. Forty male Sprague-Dawley rats (450 to 570 g). Ventricular fibrillation was induced electrically. Mechanical Ventilation and percordial compression were initiated after either a 4- or an 8-min interval of untreated cardiac arrest. Sodium bicarbonate as a CO2-generating buffer, Carbicarb and tromethamine as CO2-consuming buffers, or hypertonic saline placebo were injected as a bolus in...Continue Reading
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