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Heart rate variability spectral analysis using quadratic time-frequency representations
| Content Provider | Semantic Scholar |
|---|---|
| Author | Lontis, Eugen R. Bezerianos, Anastasios |
| Copyright Year | 2005 |
| Abstract | Time frequency representations (TFR) have been assessed with respect to time and frequency resolution using a simulated and real heart rate variability data, HRV. The Wigner-Ville Distribution proved to have a difficult interpretation due to the presence of the cross-terms. Choi-Williams, CW, and Signal-dependent radially Gaussian kernel, SD, TFRs used different techniques for cross-terms suppression and had comparative results due to the auto-terms geometry around the center in the ambiguity domain, with a trade-off between cross-terms suppression and auto-terms smoothing. An elevated vagal and a reduced sympathetic activity in the clinostatic position, and a reduced vagal and elevated sympathetic activity in the orthostatic position, respectively, have been detected in HRV by CW and SD during the tilt-up test. |
| Starting Page | 142 |
| Ending Page | 147 |
| Page Count | 6 |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://www.wseas.us/e-library/conferences/2005venice/papers/508-180.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
