Interaction between peripheral blood flow and low frequency components in cardiovascular variability signals

Author

Porta, A. ; Baselli, G. ; Cerutti, S. ; Lucini, D. ; Vecchia, L. Della ; Pagani, Mattia

Author_Institution

DiSP LITA, Milan Univ., Italy

fYear

1999

fDate

6/21/1905 12:00:00 AM

Firstpage

635

Lastpage

638

Abstract

The contribution of vasomotion to low frequency (LF, 0.03-0.14 Hz) waves in arterial pressure (AP, finger pletismography) and RR variabilities is addressed by comparing the spectra of RR, systolic AP (SAP), diastolic AP (DAP), and peripheral resistances (RES, mean AP over mean flow by laser Doppler) in the palmar region. In 22 normal volunteers, recordings were performed at rest (R) in clinostatic position and during mild exercise (EXEl, 10% maximum effort) cycling in the same position. LF predominance over the high frequency (HF, respiratory frequency) component was higher in SAP and even more in DAP than in RR; HF was virtually absent in RES. The LF central frequency shifted from 0.100 Hz for RR to 0.091 for SAP, 0.085 for DAP, and 0.073 for RES. EXEl activated LF and inhibited HF in RR; but power and frequency relationships in vascular parameters were not significantly changed

Keywords

Doppler measurement; biocontrol; cardiovascular system; electrocardiography; haemodynamics; laser applications in medicine; neurophysiology; spectral analysis; 0.03 to 0.14 Hz; LF predominance; RR variabilities; arterial pressure; at rest; cardiovascular variability signals; clinostatic position; cycling; diastolic AP; finger pletismography; frequency relationship; high frequency component; laser Doppler; low frequency components; low frequency waves; mild exercise; normal volunteers; palmar region; peripheral blood flow; peripheral resistances; power relationship; respiratory frequency; systolic AP; vascular parameters; vasomotion; Blood flow; Blood pressure; Cardiology; Digital audio players; Electrocardiography; Fingers; Frequency; Hafnium; Heart; Pulse measurements;

fLanguage

English

Publisher

ieee

Conference_Titel

Computers in Cardiology, 1999

Conference_Location

Hannover

ISSN

0276-6547

Print_ISBN

0-7803-5614-4

Type

conf

DOI

10.1109/CIC.1999.826051

Filename

826051