Parati G, di Rienzo M, Omboni S, Castiglioni P, Frattola A, Mancia G
Centro di Fisiologia Clinica e Ipertensione, Ospedale Maggiore, Milano, Italy.
Am J Hypertens. 1993 Jun;6(6 Pt 2):188S-193S.
Spectral analysis of blood pressure and heart rate signals allows overall blood pressure and heart rate variabilities to be split into their different frequency components. When used to analyze 24 h discontinuous blood pressure recordings, the low sampling frequency that characterizes these devices allows only the slow fluctuations in day and night blood pressure to be adequately described by the spectral approach. Conversely, spectral analysis of continuous blood pressure recordings provides information both on fast and slow changes in blood pressure and heart rate. Because blood pressure and heart rate powers are characterized by a 1/f distribution over the 24 h, slow fluctuations in blood pressure and heart rate contribute most importantly to 24 h variance, while faster components provide only a minor contribution. However, spectral analysis of the latter has raised considerable interest due to the possible association of these components with cardiovascular regulatory mechanisms. It is now possible to perform 24 h dynamic spectral analysis of blood pressure and heart rate on continuous blood pressure recordings obtained noninvasively by a finger pressure device.
血压和心率信号的频谱分析可将整体血压和心率变异性分解为不同的频率成分。当用于分析24小时间断血压记录时，这些设备的低采样频率使得频谱方法只能充分描述昼夜血压的缓慢波动。相反，连续血压记录的频谱分析可提供血压和心率快速及缓慢变化的信息。由于血压和心率功率在24小时内呈1/f分布，血压和心率的缓慢波动对24小时方差的贡献最为重要，而较快的成分贡献较小。然而，由于这些成分可能与心血管调节机制相关，对其进行频谱分析引起了相当大的兴趣。现在可以通过手指压力装置无创获取的连续血压记录对血压和心率进行24小时动态频谱分析。
