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首页> 外文期刊>Circulation journal >Power spectral analysis of finger plethysmographic waveform in patients with coronary artery disease and after coronary artery bypass graft surgery.
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Power spectral analysis of finger plethysmographic waveform in patients with coronary artery disease and after coronary artery bypass graft surgery.

机译：冠状动脉疾病患者和冠状动脉搭桥手术后手指体积描记波形的功率谱分析。

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BACKGROUND: The aim of the present study was to assess the clinical significance of spectral analysis of plethysmographic waveform in patients with coronary artery disease (CAD) and after coronary artery bypass graft (CABG) surgery. METHODS AND RESULTS: The study group comprised 26 healthy subjects, 15 CAD patients, and 24 CAD patients after CABG. Finger plethysmographic waveforms from both right and left index fingers were recorded and analyzed using power spectral analysis. The total power of the right pulse was found to be higher than that of left pulse in the 3 groups of subjects. In CABG patients, the total power of both pulses was increased, the right-to-left ratio of bilateral total power was decreased, and the power of the harmonics of the right pulse shifted from high-frequency to low-frequency. The normalized power of the 4th harmonic of the left pulse and of the 3rd and 4th harmonics of right pulse decreased, whereas that of the 1st harmonic of right pulse increased in CABG patients. Severalharmonics correlated significantly to some heart rate variability measures in both controls and CAD patients, but not in CABG patients. CONCLUSIONS: The increase in the total power of both pulses, the shift of the normalized power of harmonics of the right pulse from high- to low-frequency, and the decrease in the right-to-left ratio of the total power of both pulses are the 3 significant changes in the power spectra of the pulses in CAD patients after CABG. The plethysmographic waveform of normal controls and CAD patients may be modulated by the autonomic nervous system, and in CAD patients the CABG surgery may have diminished the effect of autonomic nervous modulation on the pulse waveforms.
机译：背景：本研究的目的是评估冠状动脉疾病（CAD）患者和冠状动脉搭桥术（CABG）术后体积描记波形的频谱分析的临床意义。方法和结果：研究组包括26名健康受试者，15名CAD患者和24名CABG后的CAD患者。记录左右食指的手指体积描记波形，并使用功率谱分析进行分析。在3组受试者中，发现右脉冲的总功率高于左脉冲的总功率。在CABG患者中，两个脉冲的总功率增加，双边总功率的左右比减小，并且右脉冲的谐波功率从高频变为低频。在CABG患者中，左脉冲的4次谐波，右脉冲的3次和4次谐波的归一化功率减小，而右脉冲的1次谐波的归一化功率增加。在对照组和CAD患者中，几种谐波与某些心率变异性测量值显着相关，而在CABG患者中则没有。结论：两个脉冲的总功率的增加，右脉冲的谐波的归一化功率从高频到低频的偏移以及两个脉冲的总功率的左右比的减小是CABG后CAD患者的脉冲功率谱的3个显着变化。正常对照和CAD患者的体积描记波形可以通过自主神经系统进行调节，而在CAD患者中，CABG手术可能已减少了自主神经调制对脉搏波形的影响。

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