| Circadian rhythm of the signal averaged electrocardiogram and its relation to heart rate variability in healthy subjects. | |
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MedLine Citation:
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PMID: 9659198 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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OBJECTIVE: To examine the circadian variation in the signal averaged electrocardiogram (saECG) and heart rate variability and investigate their relations in healthy subjects. METHODS: 24 hour ECGs were obtained with a three channel recorder using bipolar X, Y, and Z leads in 20 healthy subjects. The following variables were determined hourly: heart rate, filtered QRS (f-QRS) duration, low and high frequency components of heart rate variability (LF and HF), and the LF/HF ratio. RESULTS: Heart rate, f-QRS duration, HF, and the LF/HF ratio showed significant circadian rhythms, as determined by the single cosinor method. Heart rate and the LF/HF ratio increased during daytime, and f-QRS duration and HF increased at night. f-QRS duration was negatively correlated with heart rate (r = 0.95, p < 0.001) and the LF/HF ratio (r = 0.94, p < 0.001) and positively with HF (r = 0.93, p < 0.001). CONCLUSIONS: f-QRS duration has a significant circadian rhythm in healthy subjects and is closely related to the circadian rhythm of autonomic tone. |
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Authors:
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M Nakagawa; T Iwao; S Ishida; H Yonemochi; T Fujino; T Saikawa; M Ito |
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Publication Detail:
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Type: Clinical Trial; Journal Article |
Journal Detail:
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Title: Heart (British Cardiac Society) Volume: 79 ISSN: 1355-6037 ISO Abbreviation: Heart Publication Date: 1998 May |
Date Detail:
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Created Date: 1998-07-22 Completed Date: 1998-07-22 Revised Date: 2009-11-18 |
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: 493-6 Citation Subset: AIM; IM |
Affiliation:
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Department of Laboratory Medicine, Oita Medical University, Japan. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adult Circadian Rhythm* Electrocardiography, Ambulatory* Female Heart Rate / physiology* Humans Male Signal Processing, Computer-Assisted* |
| Comments/Corrections | |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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