Estimation of frequency shift in cardiovascular variability signals.
Estimation of frequency shift in cardiovascular variability signals.
复制标题
心血管变异信号频移的估计。
DOI：
10.1007/bf02345369
复制
发表时间：
2001
影响因子：
3.2
通讯作者：
Turjanmaa,V
中科院分区：
文献类型：
--
作者：
Korhonen,I;Saul,JP;Turjanmaa,V
Spectral analysis of heart rate (HR) and blood pressure (BP) oscillations has traditionally concentrated on spectral power, although a shift in spectral frequency characterises the variability better than power in some cases. Experimental data were obtained from 14 healthy males in control and pharmacological blockade conditions. When parasympathetic control was reduced, LF oscillations of HR and BP tend to shift towards lower frequencies. Three parameters were compared to estimate the spectral shift within the low frequency (LF, 0.04–0.15 Hz) band in HR and BP variability: mean (fmean), median (fmed), and central frequency (fc). Parameter variance (pSTD) and sensitivity to noise were also estimated using realistic HR, systolic BP (SBP) and diastolic BP (DBP) data. fmeanshowed the lowest parameter variance both for an autoregressive (AR) method (SBP pSTD3.1 vs 4.8 vs 4.7 mHz for fmean, fmedand fc, respectively; p<0.001) and an FFT method (SBP pSTD4.7 vs 7.7 mHz for fmeanand fmed, respectively; p<0.001). Furthermore, fmeanwas least sensitive to noise. fcshowed the poorest performance being especially sensitive to noise. To analyse the spectral shift, fmeanis preferred, since it performs better than fc, which has been used in most previous studies. To quantify the frequency of oscillations in cardiovascular signals, the mean frequency is recommended, with analyses across different spectral bands.
使用分形数聚类的心室搏动分类器
影响因子：
3.2
作者：
H. Bakardjian
通讯作者：
H. Bakardjian
梗死后患者高分辨率信号平均心电图的小波分析。
影响因子：
1.3
作者：
D. Morlet;F. Peyrin;P. Desseigne;P. Touboul;P. Rubel
通讯作者：
P. Rubel