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I.V. LABETALOL IN THE TREATMENT OF HYPERTENSION FOLLOWING CORONARY-ARTERY SURGERY

MOREL, D. R. ; FORSTER, A. ; SUTER, P. M.

In: BJA: British Journal of Anaesthesia, 1982, vol. 54, no. 11, p. 1191-1196

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    Titre
    • I.V. LABETALOL IN THE TREATMENT OF HYPERTENSION FOLLOWING CORONARY-ARTERY SURGERY
    Auteur
    • MOREL, D. R.. Department of Anesthesia, University of Geneva, Hôpital cantonal, 1211 Genéve 4, Switzerland
    • FORSTER, A.. Department of Anesthesia, University of Geneva, Hôpital cantonal, 1211 Genéve 4, Switzerland
    • SUTER, P. M.. Department of Anesthesia, University of Geneva, Hôpital cantonal, 1211 Genéve 4, Switzerland
    Type de document
    • Postprint
    Langue
    • Anglais
    Publié dans
    • BJA: British Journal of Anaesthesia, 1982, vol. 54, no. 11, p. 1191-1196. Oxford University Press
    Autre version électronique
    Identifiant OAI-PMH
    • oai:doc.rero.ch:295807
    Summary
    SUMMARY The cardiovascular effects of incremental fixed i.v. doses of labetalol were evaluated in 10 normovolaemic sedated patients presenting with hypertension and tachycardia in the early period after myocardial revas-cularizaoon. A first dose of 20 mg was sufficient to provoke a (P < 0.01) mean decrease in systolic (−9.3%), diastolic (−8.2%) and mean arterial (−7.9%) pressure (AP) and in the rate-pressure product (RPP) (−13.1%). The mean heart rate (HR) did not change significantly, but a linear correlation could be established between the change at 2 min and the value before injection (r = 0.73). A second dose of labetalol 40 mg given S min later did not decrease AP further, but a significant decrease in HR was noted. A marked difference in the individual response among patients was found as the range of effective total doses per kg body weight was 0.6-4.1 mg kg−1 (mean 2.2). Apart from one patient, no patient needed vagolytic or sympathomimetic drugs to oppose the alpha or beta actions of labetalol during the 24-h follow-up period