| Amrinone preconditioning in the isolated perfused rabbit heart. | |
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MedLine Citation:
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PMID: 10969688 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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BACKGROUND: Ischemic preconditioning (IPC) reduces infarct size in experimental preparations. IPC, however, is not without detrimental effects. We studied amrinone as a possible alternative to IPC. METHODS: Isolated perfused rabbit hearts were given a 5-minute infusion of 10 micromol/L amrinone followed by a 5-minute washout (n = 6). The anterior descending artery was then occluded for 1 hour and reperfused for 1 hour. Six hearts underwent IPC, with two episodes of 5-minute global ischemia followed by 5-minute reperfusion before LAD occlusion; eight control hearts received no preconditioning. Left ventricular pressure and ischemic zone epicardial monophasic action potentials were continuously monitored. RESULTS: IPC but not amrinone reduced peak pressure before anterior descending artery occlusion. Peak pressure fell significantly during ischemia and reperfusion in all hearts. End diastolic pressure rose significantly during reperfusion in control and IPC hearts but not in amrinone hearts. Action potentials shortened during ischemia in all hearts. They returned to preocclusion values in control hearts but lasted beyond preocclusion values in IPC and amrinone hearts. Both the incidences of ventricular fibrillation and infarct size were significantly reduced in amrinone hearts but not in IPC hearts. CONCLUSIONS: Amrinone is not only a useful inotropic agent but is also a superior preconditioning agent when compared to IPC. |
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Authors:
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A E Saltman; G R Gaudette; S Levitsky; I B Krukenkamp |
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Publication Detail:
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Type: In Vitro; Journal Article; Research Support, U.S. Gov't, P.H.S. |
Journal Detail:
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Title: The Annals of thoracic surgery Volume: 70 ISSN: 0003-4975 ISO Abbreviation: Ann. Thorac. Surg. Publication Date: 2000 Aug |
Date Detail:
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Created Date: 2000-09-27 Completed Date: 2000-09-27 Revised Date: 2007-11-14 |
Medline Journal Info:
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Nlm Unique ID: 15030100R Medline TA: Ann Thorac Surg Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 609-13 Citation Subset: AIM; IM |
Affiliation:
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Division of Cardiothoracic Surgery, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, USA. saltman@surg.som.sunysb.edu |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Action Potentials
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drug effects Amrinone / pharmacology* Animals Diastole Ischemic Preconditioning, Myocardial / methods* Male Phosphodiesterase Inhibitors / pharmacology* Rabbits Systole |
| Grant Support | |
ID/Acronym/Agency:
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R29-HL48751/HL/NHLBI NIH HHS |
| Chemical | |
Reg. No./Substance:
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0/Phosphodiesterase Inhibitors; 60719-84-8/Amrinone |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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