The Natural Frequencies of the Arterial System and Their Relation to the Heart Rate

Wang, Yuh‐Ying Lin; Jan, Ming-Yie; Shyu, Ching-Show; Chiang, Chi-Ang; Wang, Wei‐Kung

doi:10.1109/tbme.2003.820378

Cited by 54 publications

(45 citation statements)

References 9 publications

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“…Furthermore, TCM believes that pulse diagnosis is capable of determining how Qi-Blood works in Zang-Fu. All these concepts collectively point towards a hypothesis that the harmonic pattern of resonance between organs and heart should be subject to the influence of organ mass density, elasticity, and geometry (Lin Wang et al, 2004). Human and animal trials are being conducted to support this hypothesis (Young et al, 1989a;Young et al, 1989b;Young et al, 1992;Yu et al, 1994).…”

Section: Discussionmentioning

confidence: 99%

The Study of Dynamic Response to Acute Hemorrhage by Pulse Spectrum Analysis

Tsai

Lin

et al. 2006

Am. J. Chin. Med.

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Traditional Chinese Medicine (TCM) holds that blood and qi are fundamental substances in the human body for sustaining normal vital activity. The theory of qi, blood and zang-fu contribute the most important theoretical basis of human physiology in TCM. An animal model using conscious rats was employed in this study to further comprehend how organisms survive during acute hemorrhage by maintaining the functionalities of qi and blood through dynamically regulating visceral physiological conditions. Pulse waves of arterial blood pressure before and after the hemorrhage were taken in parallel to pulse spectrum analysis. Percentage differences of mean arterial blood pressure and harmonics were recorded in subsequent 5-minute intervals following the hemorrhage. Data were analyzed using a one-way analysis of variance (ANOVA) with Duncan's test for pairwise comparisons. Results showed that, within 30 minutes following the onset of acute hemorrhage,the reduction of mean arterial blood pressure was improved from 62% to 20%. Throughout the process, changes to the pulse spectrum appeared to result in a new balance over time. The percentage differences of the second and third harmonics, which were related to kidney and spleen, both increased significantly than baseline and towards another steady state. Apart from the steady state resulting from the previous stage, the percentage difference of the 4th harmonic decreased significantly to another steady state. The observed change could be attributed to the induction of functional qi, and is a result of qi-blood balancing activity that organisms hold to survive against acute bleeding.

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Section: Discussionmentioning

confidence: 99%

The Study of Dynamic Response to Acute Hemorrhage by Pulse Spectrum Analysis

Tsai

Lin

et al. 2006

Am. J. Chin. Med.

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“…21,22 Lin Wang et al 23,24 have recently refocused attention on this topic and contend that one of the functions of the heart is to generate radial oscillatory motion or resonance or vibrations of the arterial system. Fluid flow-induced sound and vibrations are well recognized in physics and have been well characterized mathematically.…”

Section: Vibrations Originating From Arteriesmentioning

confidence: 99%

“…The arterial system will have natural frequencies dependent on its geometry, physical properties of the vessel wall, constituents of the blood flowing through it, and boundary conditions at junctions. 23 Vessels can also produce subharmonic and chaotic vibrations. 28 Cardiac contraction generates an input force into the arteries that can be decomposed by Fourier series analysis into many harmonic forces of different frequencies.…”

Section: Vibrations Originating From Arteriesmentioning

confidence: 99%

Role of Epicardial Fat to Buffer Deformation and Vibration in Coronary Arteries

Rabkin¹

2017

CMRVH

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OBjECTiVES: To examine the putative physiologic role of epicardial fat to buffer the coronary arteries and to review the data on deformation and vibration in coronary arteries. METhODS: OvidSP Medline, Embase, and PubMed were systematically searched. Eligible articles on vibration in arteries and deformation of coronary arteries were assessed. RESulTS: Coronary arteries are unique because they undergo substantial deformations with twisting, bending, and stretching that are due to cardiac contraction and the tethering of the large coronary arteries to the epicardial surface of the heart. In addition, phasic coronary artery pressure and blood flow are not synchronous producing a high negative stress phase angle between circumferential strain and wall shear. Fluid flow-induced vibrations, a universal finding in conduits transporting fluid with pulsatile flow, have been documented in arteries. Arterial vibration can damage the structure of arterial wall, especially elastin and endothelial cells, leading to alterations in the arterial function. Support for a beneficial mechanical role for epicardial fat is based on the data that wrapping material to the outside of conduits not only reduces the vibration but also decreases their movement. The overall impact of an external wrap is a reduction in the probability of conduit fatigue and failure. Characteristics of the artery, such as shear modulus, are a function of the properties of each layer of the artery. The application of epicardial fat to the adventitia of arteries alters the biophysical characteristics of the artery which is the sum of each layer including the epicardial fat. Vibration, resonance, and deformation energy are lost when they hit the surface of an absorbing material. COnCluSiOnS: The integration of the biophysics of coronary arteries with knowledge of material damping principles supports a physiologic role for epicardial fat to buffer deformation and vibration in coronary arteries.

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“…Each organ has its special principal resonant frequency; the circulatory system is harmonious and stable. When an organ was excited, the resonance frequency changes [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Detection of the Cardiovascular Diseases by Using a Linearly Modeling System with the PSO-Based Classification Scheme

Shen

Chen

2008

2008 Eighth International Conference on Intelligent Systems Design and Applications

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-In general, the detection of cardiovascular disease is performed by ECG, Electrocardiogram, to dynamically monitor and analyze the disease status. Additionally, ECG is also used to diagnose the latent disease to proceed with a further treatment. Therefore, it is very important to give a reasonable judgement from the ECG diagnosis information. In this paper, a linearly modeling system is presented to characterize both the measured ECG data and Blood Pressure Wave (BPW) information. After that, the PSO algorithm, Particle Swarm Optimization, is proposed to classify the frequency responses which are derived from the linear modeling system. From the simulation result, the successful hit rate for identifying the cardiovascular samples can reach to 80%. Meanwhile, the PSO training iterations can converge under an acceptable requirement. Therefore, we can not only exactly detect the cardiovascular disease but also effectively reduce the computation time.

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The Natural Frequencies of the Arterial System and Their Relation to the Heart Rate

Cited by 54 publications

References 9 publications

The Study of Dynamic Response to Acute Hemorrhage by Pulse Spectrum Analysis

The Study of Dynamic Response to Acute Hemorrhage by Pulse Spectrum Analysis

Role of Epicardial Fat to Buffer Deformation and Vibration in Coronary Arteries

Detection of the Cardiovascular Diseases by Using a Linearly Modeling System with the PSO-Based Classification Scheme

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