| Blood flow redistribution during exercise contributes to exercise tolerance in patients with chronic heart failure. | |
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MedLine Citation:
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PMID: 17384444 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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BACKGROUND: It is widely known that blood flow redistribution is impaired in patients with chronic heart failure (CHF). However, the relationship between exercise tolerance and the degree of blood flow redistribution is not fully understood. Whole-body thallium-201 chloride ((201)Tl) scintigraphy can estimate blood flow distribution. This study will evaluate the relationship between exercise tolerance and blood flow redistribution using whole-body scintigraphy in patients with CHF. METHODS AND RESULTS: Exercise stress whole-body thallium scintigraphy was performed in 19 patients with CHF (mean ejection fraction: 33.0%; peak oxygen uptake: 15.5 ml x min(-1) x kg(-1)). Blood flow redistribution was quantified by comparing the regional thallium count (count/pixel) in the thigh and arm. We then assessed the relationship between these parameters and parameters obtained from cardiopulmonary exercise testing. (201)Thallium-chloride uptake in the thigh increased during exercise compared to rest (p<0.05), while its uptake in the arm was not different between exercise and rest. Increased (201)Tl uptake in the thigh during exercise was positively correlated with exercise tolerance (r=0.689). In contrast, (201)Tl uptake in the arm was not correlated with exercise tolerance. CONCLUSIONS: By using this method, it is concluded that blood flow redistribution to the exercising muscle increases as the exercise tolerance increases in patients with CHF. |
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Authors:
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Akihisa Miyazaki; Hitoshi Adachi; Shigeru Oshima; Koichi Taniguchi; Akira Hasegawa; Masahiko Kurabayashi |
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Publication Detail:
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Type: Clinical Trial; Journal Article |
Journal Detail:
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Title: Circulation journal : official journal of the Japanese Circulation Society Volume: 71 ISSN: 1346-9843 ISO Abbreviation: Circ. J. Publication Date: 2007 Apr |
Date Detail:
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Created Date: 2007-03-26 Completed Date: 2007-06-05 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101137683 Medline TA: Circ J Country: Japan |
Other Details:
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Languages: eng Pagination: 465-70 Citation Subset: IM |
Affiliation:
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Department of Medicine and Biological Science, Graduate School of Medicine, Gunma University. akihisam@jc5.so-net.ne.jp |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Aged Arm / blood supply Cardiac Output, Low / physiopathology*, radionuclide imaging Chronic Disease Exercise / physiology* Exercise Tolerance / physiology* Female Humans Male Middle Aged Oxygen Consumption / physiology Radionuclide Imaging Regional Blood Flow / physiology Stroke Volume / physiology Thallium Thigh / blood supply |
| Chemical | |
Reg. No./Substance:
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7440-28-0/Thallium; 7791-12-0/thallium chloride |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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