Comparison of the efficacy of vasopressin and epinephrine during cardiopulmonary resuscitation in mouse model / 中华急诊医学杂志

ABSTRACT

Objective To compare the effects between vasopressin and epinephrine during cardiopulmonary resuscitation(CPR)in a mouse model of cardiac arrest(CA).Method Transoesophageal cardiac pacing was performed so as to elicit cardiac arrest in 30 Kunming male mice.Four minutes after the initiation of cardiac pacing,the animals were prospectively randomized into three groups in equal number(n=10/group),namely,control group(saline 0.2 mL intra-arterial),vasopressin group(vasopressin 0.4U/kg intra-arterial)and epinephrine group(epinephrine 0.04 mg/kg intra-arterial),then CPR was initiated.Restoration of spontaneous circulation (ROSC)was observed.If ROSC failed to appear at 10 minutes after CPR,resuscitation was discontinued.Electrocardiogram and blood pressure of resuscitated animals were invasively monitored for an additional 60 minutes.Electrocardiogram and blood pressure.and the restoration of spontaneous respiration and survival time were observed and recorded.Results Rates of ROSC in vasopressin group and epinephrine group were significantly higher than those in saline group(9/10,10/10 vs.3/10,P＜0.05,P＜0.01 respectively),and there was signilieant difference between vasopressin and epinephrine group.All resuscitated mice treated with epinephrine restored sponlaneous respiration after ROSC,while only 4 of 9 animals trealed with vasopressin did(P＜0.05).Survival time of anireals in epinephrine group was longer than that in vasopressin group or in saline group(P＜0.05,P＜0.05,respectively).Conclusions Both vasopressin and epinephrine increase the rates of ROSC.Epinephrine 0.04 mg/kg improved respiratory function and results in a longer survival time compared with vasopressin 0.4 U/kg in this mouse model.and the precise mechanism is not clear and further investigation is required.