HR variability January 10, 2019 06:55PM |
Registered: 6 years ago Posts: 814 |
Re: HR variability January 13, 2019 02:33PM |
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Re: HR variability January 13, 2019 05:12PM |
Registered: 6 years ago Posts: 814 |
Quote
It fully explains my question. Now, i have to understand it all
Frequency domain methods: HRV may be studied in the frequency domain by converting heart rate (time domain) to a power spectrum (frequency domain) using a mathematical algorithm called the Fourier transformation. High frequencies (over 0.15 Hz) indicate respiratory sinus arrhythmia, while lower frequencies reflect autonomic (sympathetic and parasympathetic) factors. Reductions in frequency occur in patients with autonomic dysfunction, such as diabetic neuropathy. Frequency domain measures of HRV are more difficult to perform than time domain analyses. However, for continuous recordings of longer duration (such as 24 hours), time and frequency domain measurements are highly correlated.Heart rate variability with deep breathing: Deep breathing amplifies HRV, and combining HRV with deep breathing (HRVdb) is a very sensitive method of measuring ANS function. HRVdb methods correlate HRV with respiratory cycles,and usually measure the mean heart rate range (MHRR) and the expiratory-to-inspiratory ratio (E:I). HRVdb has been used reliably in autonomic function tests in various autonomic disorders, including neuropathies, neurodegenerative disorders, and autonomic failure.
Re: HR variability January 13, 2019 06:45PM |
Registered: 10 years ago Posts: 1,743 |