• Title, Summary, Keyword: pulse wave velocity

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Determinants of the Brachial-ankle Pulse Wave Velocity in Patients with Metabolic Syndrome and Ischemic Stroke (대사증후군을 동반한 허혈성 뇌혈관 질환 환자의 맥파속도에 관한 연구)

  • Kim, Dong-Woung;Park, Bo-Ra
    • Journal of Physiology & Pathology in Korean Medicine
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    • v.25 no.3
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    • pp.551-557
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    • 2011
  • The purpose of this study is to investigate the relation between brachial-ankle pulse wave velocity and the features of metabolic syndrome, and differences according to sex in patients diagnosed cerebral infarction. The study group comprised 61 patients over age 30 who were diagnosed cerebral infarction, accompanied with metabolic syndrome. The brachial-ankle pulse wave velocity, blood pressure, lipid profiles, fasting blood glucose, body mass index were measured. Also we checked past history of patients. Then we analyzed the association between brachial-ankle pulse wave velocity and the features of metabolic syndrome. Pearson correlation analysis reflected the variables affecting the brachial-ankle pulse wave velocity as follows : Age, SBP(systolic blood pressure), DBP(diastolic blood pressure), FBS(fasting blood glucose) were positively correlated. As a result of regression analysis, in patients with cerebral infarction accompanied with metabolic syndrome, the brachial-ankle pulse wave velocity is affected by age to men, SBP, FBS, DBP to women. The brachial-ankle pulse wave velocity is not affected by the components of metabolic syndrome, except blood pressure, FBS, in patients with ischemic stroke.

Peripheral Blood Flow Velocity and Peripheral Pulse Wave Velocity Measured Using a Clip-type Pulsimeter Equipped with a Permanent Magnet and a Hall Device

  • Kim, Keun-Ho;Lee, Sang-Suk
    • Journal of Magnetics
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    • v.20 no.1
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    • pp.47-51
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    • 2015
  • We measured radial arterial pulse signals using a prototype of a clip-type pulsimeter equipped with a permanent magnet and a Hall device, which produced signals through a voltage-detecting circuit. The systolic peak time and the reflective peak time for a temporally pulsed signal were analyzed for an arbitrary pulse wave at one position of a small permanent magnet. The measured value of the peripheral pulse wave velocity was about 1.25-1.52 m/s, demonstrating the accuracy of this new method. To measure the peripheral blood flow velocity, we simultaneously connected the radial artery pulsimeter to a photoplethysmography meter. The average value of the peripheral blood flow velocity was about 0.27-0.50 m/s.

Characteristics of Pulse Wave Velocity by the Simultaneously Measured ECG Waveform and Hall Device Radial Artery Waveform (ECG 파형과 홀소자 맥진파형으로 동시 측정한 맥파전달속도 특성 연구)

  • Yoo, Jae-Young;Choi, Suel-Gi;Kim, Dam-Bee;Lee, Sang-Suk
    • Journal of the Korean Magnetics Society
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    • v.22 no.4
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    • pp.136-141
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    • 2012
  • In the this research, two simultaneous peaks of radial artery pulse wave and ECG pulse wave measured by using clip-type pulsimeter and ECG were investigated in order to analyze pulse wave velocity. The measured value of a pulse wave velocity is about 5~7 m/s, it is proved one new method to measure an exact value of pulse wave velocity more than the typical biomedical signal monitoring system. This result implies that data measured by the oriental medical diagnosis apparatus as pulsimeter is clinically used in future.

A Study on Factors Influencing P-wave Velocity of Concrete (콘크리트의 P파 속도에 영향을 주는 인자에 관한 연구)

  • 이광명;이회근;김동수;김지상
    • Proceedings of the Korea Concrete Institute Conference
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    • pp.725-730
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    • 1998
  • Recently, non-destructive tests are getting popular in evaluating concrete properties without braking specimens. Among several NDT methods, P-wave velocity measurement technique has been widely used to evaluate the stiffness and strength of concrete. The purpose of this study is to investigate factors influencing P-wave velocity measured by impact-resonant method and ultrasonic pulse velocity method, such as moisture content of concrete, existence and size of coarse aggregates, sensor and sampling rate. Test results show that rod-wave velocity measured by impact-resonant method and ultrasonic pulse velocity are significantly affected by the moisture content of concrete, i.e., the lower moisture content, the lower velocity. Moisture content influences rod-wave velocity stronger than ultrasonic pulse velocity. Rod-wave velocity is faster in concrete than in mortar and is also faster in concrete containing small size aggregates. Sensor and sampling rate have little influence on velocity.

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Effects of bee venom acupuncture on heart rate variability, pulse wave, and cerebral blood flow for types of Sasang Constitution (봉약침 자극이 사상체질별 건강인의 심박변이도, 맥파, 뇌혈류에 미치는 영향)

  • Lee, Sang-Min;Kim, Koo;Oh, Seung-Yun;Kwon, Young-Mi;Joo, Jong-Cheon
    • Journal of Pharmacopuncture
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    • v.12 no.1
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    • pp.35-42
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    • 2009
  • 1. Objectives To evaluate effects of bee venom acupuncture on cardiovascular system and differences according to each constitution. 2. Methods Heart rate variability, pulse wave and the velocity of cerebral blood flow were measured before bee venom acupuncture(BVA), right after and after 30 minuets, had been applied to 20 subjects. 3. Results 1. BVA did not have effects on measurement variables of heart rate variability. 2. BVA had effects on pulse wave, showing total time, radial augmentation index up and height of percussion wave, time to percussion wave, sum of pulse pressure down. 3. BVA did not have effects on the cerebral blood flow velocity when considering not Sasang Constitution. 4. Considering Sasang Constitution, BVA demonstrates different responses in time to preincisura wave, mean blood flow velocity, peak systolic velocity and end diastolic velocity. 4.Conclusion From those results, the following conclusions are obtained. Cause BVA alters pulse wave and makes differences in the cerebral blood flow velocity according to Sasang Constitution. Various methods of BVA treatment are needed considering Sasang Constitution.

Analysis of Pulse Waveform and Pulse Wave Velocity of Carotid Artery and Radial Artery by Using Clip-type Pulsimeter Equipped with Permanent and Hall Device (영구자석과 홀소자가 구비된 맥진기를 이용한 경동맥과 요골동맥의 맥진파형과 맥파전달속도 분석)

  • Kim, Dong-Young;Lee, Sang-Suk;Hyeon, Seog-San;Rhee, Jin-Kyu
    • Journal of the Korean Magnetics Society
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    • v.24 no.5
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    • pp.146-151
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    • 2014
  • The pulse waveforms of a carotid artery in the neck and a radial artery in the hand wrist were individually measured by using clip-type pulsimeter equipped with a permanent and Hall device. The pulse transit time and the pulse wave velocity obtained through comparison of two pulse waveforms were analyzed each other. A value of the pulse wave velocity was about 8.5 m/s similar to one measured by a conservative method. This result suggests that the clip-type pulsimeter as the reproducible and reliable one oriental diagnostic medical device can be predicted to any atherosclerosis state in the cardiac circulatory system.

The Correlation analysis of Hydrotherapy and pulse wave velocity in patients with sequelae of CVA (중풍후유증 환자에 있어서 맥파전달속도와 초음파 족욕에 따른 상관관계에 관한 임상적 연구)

  • Yun, Dae-Chul;Kim, Hee-Taek;Ryu, Ju-Hyun;Choi, Jong-Min
    • The Journal of Korean Medicine Ophthalmology and Otolaryngology and Dermatology
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    • v.19 no.1
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    • pp.135-144
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    • 2006
  • Objective : The purpose of this study was to know the clinical effects of hydrotherapy based Ultrasonic spa using SoPung-Tang on pulse wave velocity in patients with sequelae of CVA. Methods : PWV(Pulse wave velocity), Bio Chemistry, Hematology, Blood Pressure were investigated in 20 patients(Experimental group 13, Control group 7) who have been in Semyung Oriental medicine hospital from December 2005 to February 2006. Results : 1. In experimental group, Rt PWV diminished 4.8%, Lt PWV 5.1%. 2. In control group, Rt PWV diminished 3.3%, Lt PWV 1.8%. Conclusion : Hydrotherapy based Ultrasonic spa using SoPung-Tang showed useful effects in patients with sequelae of CVA.

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Influence of Moisture Content on Longitudinal Wave Velocity in Concrete (수분 함유량이 콘크리트의 종파 속도에 미치는 영향에 관한 연구)

  • Lee, H.K.;Lee, K.M.;Kim, J.S.;Kim, D.S.
    • Journal of the Korean Society for Nondestructive Testing
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    • v.19 no.4
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    • pp.259-269
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    • 1999
  • Elastic wave velocity measurement technique such as impact-echo method and ultrasonic pulse velocity method has been successfully used to evaluate the moduli and strength of concrete. However, estimation results obtained by the NDT methods do not agree well with real things because longitudinal wave velocity is influenced by various factors. In this paper, among several factors influencing P-wave velocity, the influence of moisture content in concrete was investigated through the experiment. Test results show that longitudinal wave velocity is significantly affected by the moisture content of concrete, i.e., the lower moisture content. the lower velocity. Moisture content influences rod-wave velocity measured by impact-echo method stronger than ultrasonic pulse velocity measured by transmission method. During drying process with ages. the difference of increasing rate between longitudinal wave velocity and compressive strength of concrete is gradually increased. Therefore, to establish more accurate relationship between longitudinal wave velocity and strength, the difference of the increasing rate should be considered.

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A Vascular Characteristic Index of Blood Pressure Variation using the Pulse Wave Signal

  • Jung, Dong-Keun;Ha, Jeong-Seo;Kang, Gu-Tae;Ye, Soo- Young;Kim, Gi-Ryon;Jeon, Gye-Rok
    • Transactions on Electrical and Electronic Materials
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    • v.9 no.4
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    • pp.173-178
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    • 2008
  • Pulse waves continuously change with respect to the characteristics and status of the cardiovascular system and in relation to the blood pressure (BP) and the pulse wave velocity (PWV). Monitoring the vascular condition by analyzing the variations in pulse waveforms has been used to diagnose vascular disorders and in drug treatment of arteriosclerosis and peripheral circulatory obstruction. In this paper, we investigated the vascular characteristic index with regard to the BP and classified by pulse wave signals. The pressure pulse wave and photoplethysmography (PPG) were measured simultaneously while subjects exercised, producing changes in the BP, to analyze the variation in the vascular characteristic index. We investigated the correlation between the BP and vascular characteristic index with regard to the classification methods of the pulse wave. The reflection index (RI) and vascular stiffness index were correlated with the diastolic BP, but no correlation was found between these parameters and the systolic BP. These results suggest the possibility of estimating BP through simple measurements of pulse waves.

Effect of Mountain Cultivated Ginseng Pharmacopuncture on Heart Rate Variability(HRV), Pulse Wave Velocity(PWV) in Middle Aged Women (산양삼약침이 정상 중년여성의 심박변이도(HRV), 맥파속도(PWV)에 미치는 영향)

  • Park, Sang-Wook;Kim, Yi-Soon;Hwang, Won-Deok;Kim, Gyeong-Cheol
    • Journal of Acupuncture Research
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    • v.28 no.2
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    • pp.97-105
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    • 2011
  • Objectives : The aim of this experiment is to know the effect of mountain cultivated ginseng pharmacopuncture on heart rate variability(HRV), pulse wave velocity(PWV) in middle aged women. Methods : We investigated on 20 healthy Middle Aged women volunteers. First, we measured their heart rate variability(HRV), pulse wave velocity(PWV) and then mountain cultivated ginseng pharmacopuncture 20cc were injected on them. After 30 minutes, we measured heart rate variability(HRV), pulse wave velocity(PWV) again. As a result, method of one-group pretest-posttes design were used for evaluation. Results : 1. In HRV, MeanHRV is significantly decreased from 69.15 to 63.34 after injection. 2. MeanRR is significantly increased from 877.20 to 962.10 after injection. SDNN is significantly increased from 32.56 to 41.34 after injection. 3. PNN50 is significantly decreased after injection. RNSSD, SDSD, TP, VLF is significantly increased after injection. 4. Stress resistance ability is significantly increased from 37.55 to 44.60 after injection. 5. In PWV, E-R, E-L, H-R, H-L is significantly decreased after injection. Conclusions : Effect of mountain cultivated ginseng pharmacopuncture on heart rate variability(HRV) increased adaptability of autonomic nervous system and on pulse wave velocity(PWV) decreased arterial stiffness.