| Effects of breath-holding position on the QRS amplitudes in the routine electrocardiogram. | |
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MedLine Citation:
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PMID: 19520382 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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BACKGROUND: The effects of different breath-holding positions during electrocardiographic (ECG) recording on the QRS complex are unknown. METHODS: In 73 subjects, ECG recordings were made in 3 different breath-holding positions: normal expiration (rest), maximum inspiration, and maximum expiration. QRS wave excursions and changes in the frontal electrical heart axis were analyzed. RESULTS: The mean effect of respiration in most leads was small (> or =1 mm only in the S wave in V(4) and in the R wave in V(5)), but the degree of interindividual variability was often substantial, with standard deviations of > or =1.5 mm in multiple leads. CONCLUSION: The effect of different extreme breath-holding positions on the QRS complex is on average small but may be substantial in individuals. Lack of standardization of breathing instructions during recording of the ECG may result in differences in application of amplitude criteria and poorer reproducibility. |
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Authors:
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Dasten Smit; Carel C de Cock; Abel Thijs; Yvo M Smulders |
Publication Detail:
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Type: Clinical Trial; Journal Article Date: 2009-06-10 |
Journal Detail:
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Title: Journal of electrocardiology Volume: 42 ISSN: 1532-8430 ISO Abbreviation: - Publication Date: 2009 Sep-Oct |
Date Detail:
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Created Date: 2009-08-21 Completed Date: 2009-11-05 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0153605 Medline TA: J Electrocardiol Country: United States |
Other Details:
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Languages: eng Pagination: 400-4 Citation Subset: IM |
Affiliation:
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Department of Internal and Vascular Medicine, VU University Medical Center, Amsterdam 1007MB, The Netherlands. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Aged Aortic Valve Stenosis / complications, diagnosis*, surgery* Artifacts* Electrocardiography / methods* Heart Valve Prosthesis* Humans Hypertrophy, Left Ventricular / diagnosis, etiology, prevention & control Male Movement Reproducibility of Results Respiratory Mechanics* Sensitivity and Specificity Treatment Outcome |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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