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Canadian Journal of Anesthesia, Vol 46, 1070-1075, Copyright © 1999 by Canadian Anesthesiologists' Society

ARTICLES

Felypressin-induced reduction in coronary blood flow and myocardial tissue oxygen tension during anesthesia in dogs

H Agata, T Ichinohe and Y Kaneko
Department of Dental Anesthesiology, Tokyo Dental College, Chiba City, Japan.

PURPOSE: To determine whether felypressin reduced myocardial tissue oxygen tension (PmO2). METHODS: Seven open-chest dogs were studied under nitrous oxide and isoflurane anesthesia. Hemodynamic variables including heart rate (HR), blood pressure (BP), mean pulmonary arterial pressure (MPAP), PmO2 and coronary blood flow (CBF) were continuously recorded. After baseline measurements, felypressin was infused at 0.15, 0.3, 0.6 and 1.0 IU x hr(-1) in a successive manner. Hemodynamic variables were evaluated at 3, 6, 9 min after the start of each infusion. RESULTS: Felypressin caused reductions in CBF and inner layer PmO2 (int-PmO2). Decreases in CBF (-23%, P< 0.05) and int-PmO2 (-8%, P<0.05) observed at low dose (0.15 1U x hr(-1)) were not accompanied by changes in BP and HR. Negative correlations between cumulative doses of Felypressin (mIU x kg(-1)) and CBF (% change from base line) (r = -0.69, P<0.05) or int-PmO2 (% change from base line) (r = -0.48, P<0.05) were observed. CONCLUSION: Felypressin reduced PmO2 along with minimal changes in HR and BP.


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M Kasahara, T Ichinohe, and Y Kaneko
Adenosine and amrinone reverse felypressin-induced depression of myocardial tissue oxygen tension in dogs
Can J Anesth, November 1, 2000; 47(11): 1107 - 1113.
[Abstract]


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Copyright © 1999 by the Canadian Anesthesiologists' Society.