Document Detail

Correlation of Lorenz scatterplots with frequency-domain heart rate variability.
MedLine Citation:
PMID:  11848164     Owner:  NLM     Status:  MEDLINE    
Heart rate (HR) variability is important with respect to disease prognosis and the effects of drugs. Lorenz scatterplots provide a simple way to evaluate HR variability visually. The relation of Lorenz scatterplots to frequency-domain HR variability was examined in 75 Holter recordings and in simulated HR trends. The length of Lorenz scatterplots was double-exponentially correlated with total frequency and very-low frequency powers, with correlation coefficients (r) of 0.88. The width of Lorenz scatterplots was highly correlated with the high frequency power (r=0.98). The sum of the width and length of Lorenz scatterplots was highly correlated with the total frequency power (r=0.92). Identical results were obtained when simulated HR trends were used. In conclusion, Lorenz scatterplots provide a simple way to estimate the frequency-domain HR variability.
Toshiyuki Ueda; Takaaki Nakatsu; Shinichi Yamane; Sekiko Kurazono; Takashi Murakami; Keiichi Mashima; Y Tominaga; Naoki Mukouhara; Shozo Kusachi; Takao Tsuji
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Clinical and experimental hypertension (New York, N.Y. : 1993)     Volume:  24     ISSN:  1064-1963     ISO Abbreviation:  Clin. Exp. Hypertens.     Publication Date:    2002 Jan-Feb
Date Detail:
Created Date:  2002-02-18     Completed Date:  2002-07-31     Revised Date:  2007-11-15    
Medline Journal Info:
Nlm Unique ID:  9305929     Medline TA:  Clin Exp Hypertens     Country:  United States    
Other Details:
Languages:  eng     Pagination:  11-21     Citation Subset:  IM    
Department of Internal Medicine, Okayama University Medical School, Okayama, Japan.
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MeSH Terms
Aged, 80 and over
Cardiac Output, Low / physiopathology
Computer Simulation
Electrocardiography, Ambulatory
Heart Rate / physiology*
Hypertension / physiopathology
Middle Aged
Models, Cardiovascular
Myocardial Ischemia / physiopathology
Nonlinear Dynamics
Reference Values
Statistics as Topic / methods*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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