| Intra-cardiopulmonary resuscitation hypothermia with and without volume loading in an ischemic model of cardiac arrest. | |
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MedLine Citation:
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PMID: 19770397 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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BACKGROUND: We investigated the effects of intra-cardiopulmonary resuscitation (CPR) hypothermia with and without volume loading on return to spontaneous circulation and infarction size in an ischemic model of cardiac arrest. METHODS AND RESULTS: Using a distal left anterior descending artery occlusion model of cardiac arrest followed by resuscitation with a total of 120 minutes of occlusion and 90 minutes of reperfusion, we randomized 46 pigs into 5 groups and used myocardial staining to define area at risk and myocardial necrosis. Group A had no intervention. Immediately after return of spontaneous circulation, group B received surface cooling with cooling blankets and ice. Group C received intra-CPR 680+/-23 mL of 28 degrees C 0.9% normal saline via a central venous catheter. Group D received intra-CPR 673+/-26 mL of 4 degrees C normal saline followed by surface cooling after return of spontaneous circulation. Group E received intra-CPR and hypothermia after return of spontaneous circulation with an endovascular therapeutic hypothermia system placed in the right atrium and set at a target of 32 degrees C. Intra-CPR volume loading with room temperature (group C) or iced saline (group D) significantly (P<0.05) decreased coronary perfusion pressure (group C, 12.8+/-4.78 mm Hg; group D, 14.6+/-9.9 mm Hg) compared with groups A, B, and E (20.6+/-8.2, 20.1+/-7.8, and 21.3+/-12.4 mm Hg). Return of spontaneous circulation was significantly improved in group E (9 of 9) compared with groups A plus B and C (10 of 18 and 1 of 8). The percent infarction to the area at risk was significantly reduced with intra-CPR hypothermia in groups D (24.3+/-4.2%) and E (4+/-3.4%) compared with groups A (72+/-5.1%) and B (67.3+/-4.2%). CONCLUSIONS: Intra-CPR hypothermia significantly reduces myocardial infarction size. Elimination of volume loading further improves outcomes. |
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Authors:
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Demetris Yannopoulos; Menekhem Zviman; Valeria Castro; Aravindan Kolandaivelu; Ravi Ranjan; Robert F Wilson; Henry R Halperin |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2009-09-21 |
Journal Detail:
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Title: Circulation Volume: 120 ISSN: 1524-4539 ISO Abbreviation: Circulation Publication Date: 2009 Oct |
Date Detail:
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Created Date: 2009-10-06 Completed Date: 2009-10-23 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0147763 Medline TA: Circulation Country: United States |
Other Details:
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Languages: eng Pagination: 1426-35 Citation Subset: AIM; IM |
Affiliation:
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Cardiology Division, University of Minnesota, Mayo Mail Code 508, 420 Delaware St SE, Minneapolis, MN 55455, USA. yanno001@umn.edu |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Animals Blood Circulation / physiology Blood Pressure Cardiopulmonary Resuscitation / instrumentation, methods* Catheterization / instrumentation, methods Disease Models, Animal Femoral Artery / physiology Heart Arrest / therapy* Hypothermia, Induced / instrumentation, methods* Myocardial Infarction / pathology Swine Systole Ventricular Function, Left / physiology |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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