| Autor: |
Ueda, Toshiyuki, Nakatsu, Takaaki, Yamane, Shinichi, Kurazono, Sekiko, Murakami, Takashi, Mashima, Keiichi, Tominaga, Y., Mukouhara, Naoki, Kusachi, Shozo, Tsuji, Takao |
| Předmět: |
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| Zdroj: |
Clinical & Experimental Hypertension; Jan2002, Vol. 24 Issue 1/2, p11-21, 11p, 1 Chart |
| Abstrakt: |
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. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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