Abstract:Vasopressin, but not epinephrine or saline placebo, improved short-term survival in a porcine model of uncontrolled hemorrhagic shock after liver injury when surgical intervention and fluid replacement was delayed.
“…We have shown beneficial effects of vasopressin vs. epinephrine in porcine models with hemorrhagic shock (33)(34)(35). In the clinical setting, we observed positive effects of vasopressin in some patients with life-threatening hemorrhagic shock with collapsing arterial blood pressure who did not respond anymore to adrenergic catecholamines and fluid resuscitation.…”
According to new data from the European vasopressin study, we suggest, first, the administration of 1 mg of epinephrine, followed alternately by 40 IU of vasopressin and 1 mg of epinephrine every 3 mins in adult cardiac arrest victims, regardless of the initial electrocardiographic rhythm.
“…We have shown beneficial effects of vasopressin vs. epinephrine in porcine models with hemorrhagic shock (33)(34)(35). In the clinical setting, we observed positive effects of vasopressin in some patients with life-threatening hemorrhagic shock with collapsing arterial blood pressure who did not respond anymore to adrenergic catecholamines and fluid resuscitation.…”
According to new data from the European vasopressin study, we suggest, first, the administration of 1 mg of epinephrine, followed alternately by 40 IU of vasopressin and 1 mg of epinephrine every 3 mins in adult cardiac arrest victims, regardless of the initial electrocardiographic rhythm.
“…Recent studies have reported that it has beneficial effects on endotoxic [2], hemorrhagic and advanced vasodilatory shock [3][4][5][6][7]. The effect of AVP improving cardiovascular function during shock is thought to be mediated through the V1a receptor and by increasing the intracellular Ca 2+ via mobilization of intracellular stores and entry of extracellular Ca 2+ via specific calcium channels.…”
The vascular reactivity and calcium sensitivity were decreased following hemorrhagic shock. Arginine vasopressin (AVP) was beneficial to endotoxic, infectious/septic and hemorrhagic shock. Our previous studies found that Rho kinase played an important role in the occurrence of calcium desensitization following shock. It was reported that AVP was with stimulation effect of Rho kinase. So we hypothesized that AVP might have beneficial effect on shock via activation of Rho kinase to regulate the calcium sensitivity and vascular reactivity. Hemorrhagic shock (40 mmHg for 2 h) Wistar rats in vivo were adopted to observe the effects of small dose of AVP on hemodynamics, 24-h survival rate, the pressor effect of norepinephrine (NE) and the contractility of superior mesenteric artery (SMA). Isolated SMAs from hemorrhagic shock rats were adopted to observe the effects of AVP on vascular reactivity and calcium sensitivity and its relationship to Rho kinase with an isolated organ perfusion system. The results show that AVP at the concentration of 0.1 U/kg and 0.4 U/kg significantly improved the hemodynamic parameters and the 24-h survival rate of hemorrhagic shock rats. Meanwhile, these dosages of AVP significantly increased the pressor effect of NE and the contractile response of SMA to NE. Y-27632 (3 mg/kg), a Rho kinase specific inhibitor, abolished the beneficial effects of AVP. In vitro, the calcium sensitivity and vascular reactivity of SMA to calcium and NE were significantly decreased following hemorrhagic shock. AVP at the concentration of 0.5 nmol/L and 5 nmol/L significantly increased the calcium sensitivity and vascular reactivity. These effects of AVP were abolished by Y-27632 (10 mmol/L). Taken together, the results suggest that AVP at 0.1 U/kg and 0.4 U/kg is beneficial to hemorrhagic shock by improving the vascular reactivity, which involves activation of Rho kinase.
“…Arginine vasopressin has been studied in a swine model of penetrating liver injury that involved approximately 40 % loss of estimated blood volume [28]. The animal was treated with vasopressin and had higher blood pressures, and lower hemorrhage volume, when compared to animals treated with either epinephrine or saline.…”
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