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pubmed:abstractText |
To assess whether less physiological complexity underlying regulation of heart rate dynamics, as indicated by lower approximate entropy for heart rate (ApEn(HR)), is associated with frailty. For supporting validity, relationships between frailty and traditional linear indices of heart rate variability (HRV) were also assessed.
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pubmed:affiliation |
Departments of cMedicine and dEpidemiology, Division of Geriatrics Medicine and Gerontology, Center on Aging and Health, Johns Hopkins University, Baltimore, Maryland 21205, USA. pchaves@jhsph.edu
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pubmed:publicationType |
Journal Article,
Research Support, N.I.H., Extramural,
Research Support, N.I.H., Intramural
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