Nonlinear Conte-Zbilut-Federici (CZF) Method of Computing LF/HF Ratio: A More Reliable Index of Changes in Heart Rate Variability.
| Autor: | Bond V Jr; Department of Recreation, Human Performance & Leisure Studies, and Exercise Science & Human Nutrition Laboratory, Howard University Cancer Center, Washington D.C., United States of America., Curry BH; Division of Cardiology, Department of Medicine, Howard University College of Medicine & Howard University Hospital, Washington D.C., United States America., Kumar K; Department of Pharmaceutical Sciences, College of Pharmacy, Howard University, Washington D.C., United States of America., Pemminati S; Departments of Pharmacology, American University of Antigua College of Medicine and Manipal University, St. John's, Antigua and Barbuda., Gorantla VR; Behavioral Science & Neuroscience, American University of Antigua College of Medicine, St. John's, Antigua and Barbuda., Kadur K; Medical Physiology, American University of Antigua College of Medicine, St. John's, Antigua and Barbuda., Millis RM; Medical Physiology, American University of Antigua College of Medicine, St. John's, Antigua and Barbuda. |
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| Jazyk: | angličtina |
| Zdroj: | Journal of pharmacopuncture [J Pharmacopuncture] 2016 Sep; Vol. 19 (3), pp. 207-212. |
| DOI: | 10.3831/KPI.2016.19.021 |
| Abstrakt: | Objectives: Acupuncture treatments are safe and effective for a wide variety of diseases involving autonomic dysregulation. Heart rate variability (HRV) is a noninvasive method for assessing sympathovagal balance. The low frequency/high frequency (LF/HF) spectral power ratio is an index of sympathovagal influence on heart rate and of cardiovascular health. This study tests the hypothesis that from rest to 30% to 50% of peak oxygen consumption, the nonlinear Conte-Zbilut-Federici (CZF) method of computing the LF/HF ratio is a more reliable index of changes in the HRV than linear methods are. Methods: The subjects of this study were 10 healthy young adults. Electrocardiogram RR intervals were measured during 6-minute periods of rest and aerobic exercise on a cycle ergometer at 30% and 50% of peak oxygen consumption (VO Results: The frequency domain CZF computations of the LF/HF ratio and the time domain computations of the standard deviation of normal-to-normal intervals (SDNN) decreased sequentially from rest to 30% VO Conclusion: Computations of the LF/HF ratio by using the nonlinear CZF method appear to be more sensitive to changes in physical activity than computations of the LF/HF ratio by using linear methods. Future studies should determine whether the CZF computation of the LF/HF ratio improves evaluations of pharmacopuncture and other treatment modalities. Competing Interests: The authors declare that there are no conflict of interest. |
| Databáze: | MEDLINE |
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