| Treadmill exercise in apparently asymptomatic patients with moderate or severe aortic stenosis: relationship between cardiac index and revealed symptoms. | |
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MedLine Citation:
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PMID: 20424150 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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OBJECTIVES: To test whether symptoms revealed on exercise testing in patients with moderate or severe aortic stenosis are associated with changes in left ventricular systolic function and to investigate the ability of resting measures to predict peak cardiac index. METHODS: In a prospective study of asymptomatic aortic stenosis, 38 patients with a median age of 63 years (range 29-83) and an effective aortic orifice area by the continuity equation of less than 1.5 cm(2) had echocardiography, measurement of blood B-type natriuretic peptide (BNP) level and exercise haemodynamic testing using an inert gas rebreathing device. RESULTS: Revealed symptoms occurred in 10 patients in whom peak cardiac index (p=0.002), stroke index (p=0.024) and maximum oxygen consumption (VO(2)) (p=0.003) were lower than in those without symptoms. Univariate predictors of peak cardiac index were Doppler tissue peak systolic velocity (p=0.004, r=0.45), the ratio of peak transmitral E velocity to Doppler tissue Ea velocity (p=0.039, r=-0.34) and log BNP (p<0.001, r=-0.71). The only independent predictor of peak cardiac index was the log BNP level (p<0.001, r=-0.71). CONCLUSIONS: Revealed symptoms on treadmill exercise in apparently asymptomatic aortic stenosis were associated with lower peak myocardial VO(2) and lower peak stroke index during exercise. The strongest resting predictor of revealed symptoms and of peak cardiac index was the blood BNP level. |
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Authors:
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Ronak Rajani; Helen Rimington; John B Chambers |
Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Heart (British Cardiac Society) Volume: 96 ISSN: 1468-201X ISO Abbreviation: Heart Publication Date: 2010 May |
Date Detail:
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Created Date: 2010-04-28 Completed Date: 2010-06-08 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9602087 Medline TA: Heart Country: England |
Other Details:
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Languages: eng Pagination: 689-95 Citation Subset: AIM; IM |
Affiliation:
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Valve Study Group, Guy's and St Thomas Hospitals Foundation Trust, London, UK. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adult Aged Aged, 80 and over Aortic Valve Stenosis / physiopathology*, ultrasonography Echocardiography Exercise / physiology* Exercise Test Female Hemodynamics / physiology* Humans Male Middle Aged Natriuretic Peptide, Brain / metabolism Prospective Studies Risk Factors Ventricular Dysfunction, Left / etiology*, physiopathology, ultrasonography |
| Chemical | |
Reg. No./Substance:
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114471-18-0/Natriuretic Peptide, Brain |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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