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  • Title: [Arginine-vasopressin in septic and vasodilatorial shock].
    Author: Dünser MW, Hasibeder WR, Wenzel V, Meier-Hellmann A.
    Journal: Anasthesiol Intensivmed Notfallmed Schmerzther; 2006 Nov; 41(11):716-9. PubMed ID: 17151983.
    Abstract:
    Current therapy of septic/vasodilatory cardiovascular failure includes volume resuscitation and infusion of inotropic and vasopressor agents. Norepinephrine is the first-line vasoconstrictor, and can stabilize hemodynamic variables in most patients. Nonetheless, irreversible cardiovascular failure which is resistant to conventional hemodynamic therapies still is the main cause of death in patients with severe sepsis and septic shock. In such advanced, catecholamine-resistant shock states, arginine-vasopressin (AVP) has repeatedly caused an increase in mean arterial blood pressure, a decrease in toxic norepinephrine-dosages, as well as further beneficial hemodynamic, endocrinologic and renal effects. Although AVP exerted negative inotropic effects in previous clinical trials and in selected animal experiments, a continuous low-dose AVP infusion during advanced septic/vasodilatory shock caused a decrease in cardiac index only in patients with a hyperdynamic circulation. Adverse effects on gastrointestinal circulation and the systemic microcirculation can not be excluded, but have not yet been confirmed in clinical prospective trials. Negative side effects of a supplementary AVP therapy are an increase in total bilirubin concentrations, and a decrease in platelet count. A transient increase in hepatic transaminases during AVP infusion is most likely related to preceding hypotensive episodes. Important points which must be considered when using AVP as a "rescue vasopressor" in septic/vasodilatory shock states are: 1) AVP infusion only in advanced shock states that can not be adequately reversed by conventional hemodynamic therapy (e.g. norepinephrine >0,5-0,6 mug/kg/min), 2) presence of normovolemia, 3) AVP infusion only in combination with norepinephrine, 4) strict avoidance of bolus injections and dosages >4 IU/h. Effects of a supplementary AVP infusion in advanced vasodilatory shock on survival are currently examined in a large, prospective multicenter trial in North America and Australia.
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