| Monitoring regional myocardial function after myocardial revascularization. | |
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MedLine Citation:
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PMID: 7087529 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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A system using only small platinum electrodes for monitoring intramyocardial polarographic oxygen tension (MP02), electrograms (ECG), and impedance-derived wall motion (WM) was experimentally tested and clinically implemented. In nine open-chest, anesthetized dogs. two platinum electrodes were inserted along the subepicardial direction of the muscle fibers. As verified by cinefluoroscopy, WM corresponded to changes in distance between the platinum electrodes (r = 0.91 +/- 0.02). The system responded to a 10 minute occlusion of the left anterior descending coronary artery (LAD) as follows: Dyskinetic WM appeared in 10 seconds (p less than 0.05); MP02 decreased (26.4 +/- 1.8 to 14.8 +/= 1.9 mm Hg, p less than 0.05) in 1 minute; ST segments increased (4.8 +/- 1.5 to 12.3 +/- 3.1 mV, p less than 0.05) in 3 minutes. On reperfusion, WM, ST segments, and MP02 normalized in 15 seconds, 30 seconds, and 1 minute, respectively. Hence, ischemia affects WM more acutely than either ECG or MP02. In five patients, ischemic changes before coronary bypass were reversed over 5 days: MP02 (17.4 +/-; 1.9 to 19.6 +/-1.7 mm Hg), ST segment (2.2 +/- 6 to 1.0 +/- 0.4 mV), and WM returned to normal. Thus a system has been designed which simultaneously monitors regional WM, MP02, and ECG. The method has proved to be a sensitive and practical approach for assessing perioperative myocardial function. |
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Authors:
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L Wiener; W Santamore; J Y Templeton; L Plzak |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, P.H.S. |
Journal Detail:
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Title: The Journal of thoracic and cardiovascular surgery Volume: 84 ISSN: 0022-5223 ISO Abbreviation: J. Thorac. Cardiovasc. Surg. Publication Date: 1982 Jul |
Date Detail:
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Created Date: 1982-08-26 Completed Date: 1982-08-26 Revised Date: 2007-11-14 |
Medline Journal Info:
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Nlm Unique ID: 0376343 Medline TA: J Thorac Cardiovasc Surg Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 130-7 Citation Subset: AIM; IM |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Animals Cardiography, Impedance Cardiopulmonary Bypass Dogs Electrocardiography Electrodes Heart / physiology*, physiopathology Humans Monitoring, Physiologic / methods* Myocardial Contraction Myocardial Revascularization* Platinum |
| Grant Support | |
ID/Acronym/Agency:
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HL 22815/HL/NHLBI NIH HHS; HL 26592/HL/NHLBI NIH HHS |
| Chemical | |
Reg. No./Substance:
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7440-06-4/Platinum |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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