Wavelet coherence analysis of spontaneous oscillations in cerebral tissue oxyhemoglobin concentrations and arterial blood pressure in elderly subjects

2014 ◽  
Vol 93 ◽  
pp. 14-20 ◽  
Author(s):  
Ruofei Cui ◽  
Ming Zhang ◽  
Zengyong Li ◽  
Qing Xin ◽  
Liqian Lu ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Arterial Blood Pressure ◽  
Wavelet Coherence ◽  
Elderly Subjects ◽  
Coherence Analysis ◽  
Cerebral Tissue ◽  
Arterial Blood ◽  
Spontaneous Oscillations ◽  
Wavelet Coherence Analysis

scholarly journals Age-Related Changes in Spontaneous Oscillations Assessed by Wavelet Transform of Cerebral Oxygenation and Arterial Blood Pressure Signals

2013 ◽  
Vol 33 (5) ◽  
pp. 692-699 ◽  
Author(s):  
Zengyong Li ◽  
Ming Zhang ◽  
Qing Xin ◽  
Site Luo ◽  
Ruofei Cui ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Wavelet Transform ◽  
Arterial Blood Pressure ◽  
Cerebral Oxygenation ◽  
Oxygenation Index ◽  
Elderly Subjects ◽  
Arterial Blood ◽  
Age Related ◽  
Spontaneous Oscillations ◽  
Young Subjects

The study aims to assess the spontaneous oscillations in elderly subjects based on the wavelet transform of cerebral oxygenation (CO) and arterial blood pressure (ABP) signals. Continuous recordings of near-infrared spectroscopy (NIRS) and ABP signals were obtained from simultaneous measurements in 20 young subjects (age: 27.3 ± 7.1 years) and 15 elderly subjects (age: 70.8 ± 5.1 years) at rest. Using spectral analysis based on wavelet transform, five frequency intervals were identified (I, 0.005 to 0.02 Hz; II, 0.02 to 0.06 Hz; III, 0.06 to 0.15 Hz; IV, 0.15 to 0.40 Hz; and V, 0.40 to 2.0 Hz). The average amplitudes of the Δ[HbO2] and tissue oxygenation index in intervals I to V and the relative amplitudes in intervals IV and V were significantly lower in elderly subjects than in young subjects ( P < 0.05). In addition, the relative amplitudes of the ABP in interval I were significantly lower in elderly subjects than in young subjects ( P = 0.016). The present findings suggest the presence of a cerebrovascular degenerative process caused by aging. Spontaneous oscillations in the CO could be used as an indicator of cerebrovascular changes and could be used to identify the risk for cerebrovascular degenerative processes.

Wavelet coherence analysis of prefrontal oxygenation signals in elderly subjects with hypertension

2014 ◽  
Vol 35 (5) ◽  
pp. 777-791 ◽  
Author(s):  
Zengyong Li ◽  
Ming Zhang ◽  
Ruofei Cui ◽  
Qing Xin ◽  
Lu Liqian ◽  
...  
Keyword(s):  
Wavelet Coherence ◽  
Elderly Subjects ◽  
Coherence Analysis ◽  
Wavelet Coherence Analysis

Spontaneous oscillations of arterial blood pressure, cerebral and peripheral blood flow in healthy and comatose subjects

1999 ◽  
Vol 21 (7) ◽  
pp. 665-669 ◽  
Author(s):  
Erhard W. Lang ◽  
Rolf R. Dieh ◽  
Lars Timmermann ◽  
Ralf Baron ◽  
Giinther Deusch ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Blood Flow ◽  
Arterial Blood Pressure ◽  
Peripheral Blood ◽  
Peripheral Blood Flow ◽  
Arterial Blood ◽  
Spontaneous Oscillations
Sign in / Sign up

Export Citation Format

Share Document