Reversal of deteriorated fractal behavior of heart rate variability by beta-blocker therapy in patients with advanced congestive heart failure

Lian Yu Lin, Jiunn Lee Lin, Chao Cheng Du, Ling Ping Lai, Yung Zu Tseng, Shoei K.Stephen Huang

研究成果: 雜誌貢獻文章同行評審

62 引文 斯高帕斯(Scopus)

摘要

Introduction: The slope of the power spectrum in heart rate variability (HRV) reflects the fractal or scaling behavior in HR dynamics and recently was confirmed as an independent predictor of postmyocardial infarction survival. Whether or not the new measurement in HRV foresees the functional evolution in patients with advanced congestive heart failure treated by β blockers is unclear. Methods and Results: Sequential 24-hour Holter ECG recordings were obtained at baseline, and 1 and 3 months after addition of atenolol therapy for advanced congestive heart failure in 10 patients. The slope and intercept of the regression line of power-law behavior, the short- and intermediate-term of detrended fluctuated analysis (DFA), the approximate entropy (ApEn), and the standard frequency spectra of the 24-hour HRV were compared sequentially as well as with those in 12 age-matched normal controls. The results showed that the slope (-1.70 ± 0.45 vs -1.22 ± 0.21; P < 0.05) and the intercept (5.11 ± 0.46 vs 5.62 ± 0.24; P < 0.05) of the regression line of power-law behavior and the short-term DFA (for 4 to 11 beats) (0.78 ± 0.18 vs 1.13 ± 0.21; P < 0.05) increased after 3 months of atenolol treatment. However, the change in intermediate-term DFA (>11 beats) and ApEn was not apparent (1.24 ± 0.21 vs 1.22 ± 0.15 and 1.34 ± 0.14 vs 1.36 ± 0.11; both P > 0.05). The evolution of the slope or intercept of the regression line of the HRV power spectrum did not correlate with the echocardiographic or clinical cardiac function, or with the frequency spectral components of the HRV (P > 0.05). Conclusion: Additional beta-blocker therapy upregulated the fractal behavior control of the HRV in patients with advanced congestive heart failure. The improvement was independent of subjective and objective global cardiac performance.
原文英語
頁(從 - 到)26-32
頁數7
期刊Journal of Cardiovascular Electrophysiology
12
發行號1
DOIs
出版狀態已發佈 - 一月 1 2001
對外發佈

ASJC Scopus subject areas

  • 心臟病學與心血管醫學
  • 生理學(醫學)

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