Key Points
- This research aims to evaluate the effectiveness of complex demodulation in analyzing cardiovascular variability components.
- Assessed cardiovascular variability using complex demodulation during postural tilt in 23 young healthy subjects.
- Evaluated low-frequency and high-frequency amplitudes of heart rate and blood pressure variabilities.
- Conducted time-dependent analysis with a resolution of less than 15 seconds.
- HF amplitude of heart rate rapidly decayed during head-up tilt (P < 0.01) and exhibited overshoot upon returning to supine (P < 0.01).
- LF amplitude of blood pressure showed rhythmic fluctuations of 48-100s during head-up tilt (P < 0.01).
- LF amplitude fluctuations of heart rate synchronized with blood pressure during the tilt (P < 0.01).
Structured PICO
PPopulation23 young healthy subjects (and simulated data)
IInterventionComplex demodulation (CDM) analysis during postural tilt test
OOutcomeTime-dependent responses of low-frequency (LF) and high-frequency (HF) amplitudes of heart rate and blood pressure variabilitiessurrogate
Complex demodulation provides a continuous assessment of cardiovascular variability components, revealing dynamic autonomic circulatory control responses to upright posture.