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CARDIOVASCULAR ANESTHESIA

Treatment of Intraoperative Refractory Hypotension with Terlipressin in Patients Chronically Treated with an Antagonist of the Renin-Angiotensin System

Department of Anesthesiology and Critical Care, Groupe Hospitalier Pitié-Salpêtrière, Paris, France

Address correspondence and reprint requests to Dr. Daniel Eyraud, Department d'Anesthésie-Réanimation, Groupe Hospitalier Pitié-Salpêtrière, 47 Blvd. de l'Hôpital, 75651 Paris Cedex, France.

The goal of the present study was to determine whether terlipressin, an agonist of the vasopressin system, could counteract perioperative hypotension refractory to common vasopressor therapy and to analyze its circulatory effects. We enrolled 51 consecutive vascular surgical patients chronically treated with angiotensin-converting enzyme inhibitors or antagonists of the receptor of angiotensin II, who received a standardized opioid-propofol anesthetic. Of these 51 patients, 32 had at least one episode of hypotension, which responded to epinephrine or phenylephrine. In 10 other patients, systolic arterial pressure (SAP) did not remain above 100 mm Hg for 1 min, despite three bolus doses of ephedrine or phenylephrine. In these patients, we injected a bolus of 1 mg of terlipressin, repeated twice if necessary. Hemodynamic and echocardiographic variables were recorded every 30 s over 6 min. In eight patients, arterial pressure was restored with one injection of terlipressin; in two other patients, three injections were necessary. One minute after the last injection of terlipressin, the SAP increased from 88 ± 3 to 100 ± 4 mm Hg and reached 117 ± 5 mm Hg (P = 0.001) 3 min after the injection and remained stable around this value. This increase in SAP was associated with significant changes in left ventricular end-diastolic area (17.9 ± 2 vs 20.2 ± 2.2 cm²; P = 0.003), end-systolic area (8.1 ± 1.3 vs 9.6 ± 1.5 cm²; P = 0.004), end-systolic wall stress (45 ± 8 vs 66 ± 12; P = 0.001), and heart rate (60 ± 4 vs 55 ± 3 bpm; P = 0.001). Fractional area change and velocity of fiber shortening did not change significantly. No additional injection of vasopressor was required during the perioperative period. No change in ST segment was observed after the injection.

Implications: Terlipressin is effective to rapidly correct refractory hypotension in patients chronically treated with antagonists of the renin-angiotensin system without impairing left ventricular function.

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