Estimation of spontaneous baroreflex sensitivity using transfer function analysis: effects of positive pressure ventilation
| Autor: | Martin Glos, Susanne Endres, Ingo Fietze, Dietrich Romberg |
|---|---|
| Rok vydání: | 2007 |
| Předmět: |
Adult
Male medicine.medical_specialty Baroreceptor Biomedical Engineering Positive pressure Blood Pressure Baroreflex Models Biological Sensitivity and Specificity Positive-Pressure Respiration Heart Rate Internal medicine medicine Humans Computer Simulation Diagnosis Computer-Assisted Respiratory system business.industry Reproducibility of Results Cardiorespiratory fitness Numerical Analysis Computer-Assisted Middle Aged Positive pressure breathing Blood pressure Cardiology Breathing Respiratory Mechanics Female business Algorithms |
| Zdroj: | Biomedizinische Technik. Biomedical engineering. 52(1) |
| ISSN: | 0013-5585 |
| Popis: | To determine the short-term effects of non-invasive positive pressure ventilation (PPV) on spontaneous baroreflex sensitivity, we acquired time series of RR interval and beat-to-beat blood pressure in 55 healthy volunteers (mean age 46.5+/-10.5 years), who performed breathing tests on four occasions at frequencies of 12 and 15/min, with application of PPV of 5 mbar, and without positive pressure (control). Using spectral and transfer function analysis, we estimated RR interval variability (HRV) and systolic blood pressure variability (SBPV), as well as the gain (alpha-index) and phase shift (Phi) of the baroreceptor reflex for low- (LF) and high-frequency (HF) bands. Compared to control breathing, PPV at 12 and 15/min led to an increase in mean RR (p |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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