Effects of isoflurane anesthesia on aortic compliance and systemic hemodynamics in compliant and noncompliant aortas.
Τίτλος | Effects of isoflurane anesthesia on aortic compliance and systemic hemodynamics in compliant and noncompliant aortas. |
Publication Type | Journal Article |
Year of Publication | 2013 |
Authors | Ioannou, C. V., Stergiopulos N., Georgakarakos E., Chatzimichali E., Katsamouris A. N., & Morel D. R. |
Journal | J Cardiothorac Vasc Anesth |
Volume | 27 |
Issue | 6 |
Pagination | 1282-8 |
Date Published | 2013 Dec |
ISSN | 1532-8422 |
Λέξεις κλειδιά | Anesthesia, General, Anesthesia, Inhalation, Anesthetics, Inhalation, Animals, Aorta, Blood Pressure, Blood Vessel Prosthesis, Cardiac Surgical Procedures, Compliance, Hemodynamics, Isoflurane, Pressoreceptors, Swine, Swine, Miniature, Vascular Stiffness |
Abstract | OBJECTIVES: To investigate the effect of general anesthesia on aortic compliance and other cardiovascular hemodynamics in chronically instrumented pigs with compliant and noncompliant (stiff) aortas.DESIGN: Experimental study.SETTING: University animal laboratory.PARTICIPANTS: Twelve adult Yucatan miniature pigs.INTERVENTIONS: Chronic instrumentation of a compliant (control; n = 7) and noncompliant (n = 5) group to measure pressure and flow in the ascending aorta. A Teflon prosthesis was wrapped around the aorta (noncompliant group) to limit wall compliance.MEASUREMENTS AND MAIN RESULTS: Hemodynamic parameters were recorded on the 15th postoperative day, both awake and after general anesthesia. Banding the aorta caused a significant decrease in arterial compliance (-49%, p<0.001) and increases in systolic blood pressure (SBP: +38%, p = 0.001) and pulse pressure (+107%, p< 0.01). Induction of anesthesia in the control group produced a 15% increase in arterial compliance (p<0.05), resulting in a subtle decrease in SBP (-12%), diastolic blood pressure (DBP; -13%) and mean blood pressure (MBP; -12%). Induction of anesthesia in the noncompliant group also caused a significant increase in arterial compliance (17%, p<0.001), but caused significant decreases in SBP (21%, p<0.01), DBP (23%, p<0.01) and MBP (22%, p<0.01) as compared with controls.CONCLUSIONS: Induction of general anesthesia caused a similar increase in total arterial compliance and was associated with a decrease in SBP that was more pronounced in animals with noncompliant aortas. These results indicated that anesthesia caused a greater hemodynamic effect on noncompliant (stiff) aortas and may explain the extensive hemodynamic fluctuation and instability often observed in atherosclerotic, elderly patients with stiff aortas. |
DOI | 10.1053/j.jvca.2013.04.015 |
Alternate Journal | J. Cardiothorac. Vasc. Anesth. |
PubMed ID | 24035064 |