Power spectral analysis of plethysmographic pulse waveform in pregnant women

Su, Yi-Ju; Lu, Wan-An; Chen, Gau-Yang; Liu, Margaret; Chao, Hsiang‐Tai; Kuo, Cheng–Deng

doi:10.1007/s10877-011-9291-3

Cited by 7 publications

(6 citation statements)

References 29 publications

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“…Correlation analysis shows that the %Ph2 correlates significantly and negatively with %mRRI and significantly and positively with %HR in the TCC practitioners (Table 4 ). These findings are similar to the finding of Su et al [ 18 ] that the power of the 2 nd pulse harmonic was increased, whereas the total power of pulse and the powers of higher order harmonics were decreased during pregnancy. Decreased vascular resistance due to pregnancy was proposed to account for the increased power of the 2 nd pulse harmonic during pregnancy [ 18 ].…”

Section: Discussionsupporting

confidence: 92%

“…These findings are similar to the finding of Su et al [ 18 ] that the power of the 2 nd pulse harmonic was increased, whereas the total power of pulse and the powers of higher order harmonics were decreased during pregnancy. Decreased vascular resistance due to pregnancy was proposed to account for the increased power of the 2 nd pulse harmonic during pregnancy [ 18 ]. Thus, the observed increase in the power of the 2 nd pulse harmonic in TCC practitioners might also be caused by the decreased vascular resistance after TCC exercise.…”

Section: Discussionsupporting

confidence: 92%

“…The capacitance or the ability of the attached organs to hold blood was shown to be related to specific Fourier components of the blood pressure pulse via their influence on the blood pressure wave propagation, and thus the blood distribution to the body [ 14 – 17 ]. It has also been shown that the power of harmonics of arterial pulse wave can be described by an exponential decay function with respect to the order of harmonics in both non-pregnant and pregnant women [ 18 ]. Therefore, the power spectral analysis of the pulse waveform might be a useful method with which to assess the cardiovascular function of the subject [ 5 ].…”

Section: Introductionmentioning

confidence: 99%

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Increased first and second pulse harmonics in Tai Chi Chuan practitioners

Lu¹,

Chen²,

Kuo³

2016

BMC Complement Altern Med

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BackgroundTai Chi Chuan (TCC) is known to be a good calisthenics for people. This study examined the relationship between pulse harmonics and autonomic nervous modulation in TCC practitioners.MethodsPower spectral measures of right pulse wave and heart rate variability (HRV) measures were compared between TCC practitioners and control subjects. Correlation analyses between pulse harmonics and HRV measures were performed using linear regression analysis.ResultsAt baseline, the total power of pulse (TPp), powers of all individual pulse harmonics, normalized power of the 1st harmonics (nPh1) of TCC practitioners were greater, while the normalized power of the 4th pulse harmonics (nPh4) of TCC practitioners was smaller, than those of the controls. Similarly, the baseline standard deviation (SDRR), coefficient of variation (CVRR), and normalized high-frequency power (nHFP) of RR intervals were smaller, while the normalized very low-frequency power (nVLFP) and low-/high- frequency power ratio (LHR) were larger in the TCC practitioners. The TCC age correlated significantly and negatively with nPh1, and nearly significantly and negatively with nPh2 in the TCC practitioners. Thirty min after TCC exercise, the percentage changes in mRRI, SDRR, TP, VLFP were decreased, while the percentage changes in HR, ULFP, nLFP, and Ph2 were increased, relative to the controls. Correlation analysis shows that the %Ph2 correlates significantly and negatively with %mRRI and significantly and positively with %HR.ConclusionThe TCC practitioners had increased baseline total power of pulse and the 1st and 2nd pulse harmonics, and decreased power of the 4th pulse harmonics, along with decreased vagal modulation and increased sympathetic modulation. After TCC exercise, the power of the 2nd harmonics of TCC practitioners was increased which might be related to the increase in HR due to decreased vascular resistance after TCC exercise.

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Section: Discussionsupporting

confidence: 92%

Section: Discussionsupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Increased first and second pulse harmonics in Tai Chi Chuan practitioners

Lu¹,

Chen²,

Kuo³

2016

BMC Complement Altern Med

Self Cite

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“…We found in this study that the TPp of right pulse, and nP5~nP8 of bilateral pulses in the late pregnant women were all significantly smaller than their counterparts in the non-pregnant women, whereas the nP2 of bilateral pulses in the late pregnant women were significantly greater than their counterparts in the non-pregnant women, in accordance with a previous study [24]. The decrease in TPp of right pulse, and nP5~nP8 of bilateral pulses in the late pregnant women might be caused by the aorto-caval compression due to enlarged gravid uterus in late pregnancy.…”

Section: Discussionsupporting

confidence: 92%

Left-right Asymmetry of Pulse Harmonics in Non-pregnant Women and Late Pregnant Women

Kuo¹

2014

Journal of Clinical & Experimental Cardiology

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“…However, a study showed that the sympathy–vagal balance can be assessed at rest and during recovery, but it is not supported during exercise ( 4 ). Increased power of harmonics of pulse wave might be caused by the decrease in vascular resistance ( 31 ). Therefore, responses of energy ratio may be affected by blood flow distribution, autonomic nervous modulation, and vascular resistance.…”

Section: Discussionmentioning

confidence: 99%

Frequency-Domain Characteristics Response to Passive Exercise in Patients With Coronary Artery Disease

Zhang

2021

Front. Cardiovasc. Med.

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Purpose: The enhanced external counterpulsation (EECP), a kind of passive exercise, is a novel non-invasive therapy used to improve peripheral perfusion in patients with coronary artery disease (CAD). However, whether frequency-domain characteristics of peripheral hemodynamics may benefit from passive exercise needs to be verified.Methods: We recruited 21 patients with CAD and 21 healthy controls in this study. Ultrasonic blood flow velocity spectrum in left carotid (LC) and right carotid (RC) common arteries, and right brachial (RB) and right femoral (RF) arteries was monitored using an ultrasonic Doppler. Frequency-domain characteristics before, during, and after passive exercise were extracted from ultrasonic spectrum images. The first and second peak amplitudes/frequencies (y1, y2, x1, x2) and power spectral energy ratio (PSER) in the 0–2.05 Hz/0.87 Hz (p5, p6) were calculated by fast Fourier transform and power spectrum density analysis.Results: For the amplitude and frequency characteristics of the spectrum, y1 in the LC of patients with CAD was significantly decreased during exercise (p = 0.036), whereas, y2 was significantly decreased immediately after passive exercise (p = 0.038). Besides those, y1 only in the RC and RB of controls was significantly decreased during exercise. Immediately after exercise, y2 in the LC of control was significantly lower than at the baseline (p = 0.014). For the energy ratio characteristics of the spectrum, there was an opposite response in the two groups that p6 was significantly reduced and elevated in the LC of controls and in the RB of patients with CAD during exercise (both p < 0.05).Conclusions: Passive exercise reduces amplitude and frequency characteristics of carotid arteries, while there was an opposite response of energy ratio characteristics in the LC and RB arteries to passive exercise between CAD patients and controls. Additionally, energy ratio characteristics of spectrum in the brachial artery were markedly elevated in CAD patients during passive exercise. Moreover, passive exercise only reduces amplitude characteristics of LC artery in the control group.

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Power spectral analysis of plethysmographic pulse waveform in pregnant women

Cited by 7 publications

References 29 publications

Increased first and second pulse harmonics in Tai Chi Chuan practitioners

Increased first and second pulse harmonics in Tai Chi Chuan practitioners

Left-right Asymmetry of Pulse Harmonics in Non-pregnant Women and Late Pregnant Women

Frequency-Domain Characteristics Response to Passive Exercise in Patients With Coronary Artery Disease

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