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Search Results: 1 - 10 of 9586 matches for " Pulse Wave Velocity "
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Immediate impact of exercise on arterial stiffness in humans  [PDF]
Jae-Bin Seo, Woo-Young Chung, Sang-Hyun Kim, Myung-A Kim, Joo-Hee Zo
World Journal of Cardiovascular Diseases (WJCD) , 2013, DOI: 10.4236/wjcd.2013.31009
Abstract:

Background and objectives: Increased arterial stiffness is an accepted cardiovascular risk factor. Several studies have shown that regular exercise is associated with reduced arterial stiffness. However, the acute effect is not well known. The aim of this study was to evaluate the immediate impact of exercise on arterial stiffness measured by pulse wave velocity (PWV). Subjects and Methods: Data from 100 consecutive patients who underwent graded maximal aerobic exercise test and pulse wave velocity study due to chest pain were analyzed. Results: With respect to brachial-ankle pulse wave velocity (baPWV), it decreased after the exercise test (before vs. after; 1420 ± 260 vs. 1358 ± 245, 1428 ± 255, vs. 1360 ±239 cm/sec; left and right, respectively). Upper extremity systolic blood pressure did not change from baseline. However, upper extremity diastolic blood pressure increased slightly. In addition, lower extremity blood pressure decreased in both systolic and diastolic phases. In both normotensives and hypertensives, baPWV decreased after exercise test. Conclusion: Exercise immediately decreases arterial stiffness.

Assessment of Arterial Stiffness Index in Hypertensive Patients in Relation to Their Treatment Status Attending a Tertiary Care Center in South India  [PDF]
Shourya Kola, Melvin George, Suresh Kumar Srinivasamurthy, Sandhiya Selvarajan, Kadhiravan Tamilarasu, Rathinam Palamalai Swaminathan, Adithan Chandrasekaran
Pharmacology & Pharmacy (PP) , 2014, DOI: 10.4236/pp.2014.54050
Abstract:

Objectives: To assess the arterial stiffness index (ASI) and pulse wave velocity (PWV) in patients with hypertension and to compare with age matched healthy controls; to assess and compare the ASI and PWV in relation to the treatment status. Methods: The study was observational-cross sectional. Group one included chronic hypertensive patients on regular treatment for more than 2 months; group two included newly diagnosed hypertensive patients and group three had age matched healthy controls with normal blood pressure. The hypertensives subjects with other comormid conditions such as renal disease, diabetes were excluded from the study. The study was approved by the Institute Ethics Committee. The subjects were interviewed and explained the purpose of the study. All subjects gave written informed consent. The noninvasive periscope device was used to measure PWV, ASI and pulse pressure. Results: PWV, ASI and pulse pressure were statistically higher in hypertensive patients when compared to controls. Further, carotid-femoral PWV was correlated with mean arterial pressure in hypertensive subjects and was found to be statistically significant. Conclusion: PWV, ASI and pulse pressure are significantly higher in chronic and newly diagnosed non-diabetic hypertensives as compared to controls irrespective of their treatment status.

Local Pulse Wave Velocity Estimation in the Carotids Using Dynamic MR Sequences  [PDF]
Mohamad Ayham Darwich, Fran?ois Langevin, Khaldoun Darwich
Journal of Biomedical Science and Engineering (JBiSE) , 2015, DOI: 10.4236/jbise.2015.84022
Abstract: The current study presents a new protocol for local pulse wave velocity (PWV) measurement using dynamic MR sequences, which have a high temporal resolution (TR < 6 ms). MR images were obtained at two positions along the common carotid artery, separated by a distance of 5 cm. In each phase of a MR series, carotid region was automatically extracted and then its area distension waveform could be obtained. Sixteen volunteers with no symptoms of cardiovascular diseases were studied. For local PWV estimation, three delay estimation principles were tested and produced the following values: intersecting tangents method (M1): 4.72 ± 1.40 m/s, second derivative method (M2): 4.94 ± 1.68 m/s and cross-correlation method (M3): 5.03 ± 1.17 m/s. The cross-correlation method showed a relative high reliability as its least standard deviation.
Estimación de la velocidad de propagación aórtica basada en el análisis de la onda de pulso radial
Clara,Fernando; Blanco,Gustavo; Casarini,Alfredo; Corral,Pablo; Meschino,Gustavo; Scandurra,Adriana;
Medicina (Buenos Aires) , 2011,
Abstract: we analyzed the possibility of using the radial pulse wave morphology, obtained by a movement transducer, to evaluate the aortic pulse wave velocity. the radial pulse wave signals were obtained by using a transducer, located on the pulse palpation area, in 167 healthy normotensive male volunteers, ages 20 to 70. the reflected wave was identified in every case. also, a speed coefficient was defined as the ratio between the individual's height and the time between the maximum systolic wave and the arrival time of the reflected wave. we found that the specified coefficient in normotensive individuals increased linearly with age, in a similar way to the increase in aortic propagation velocity measured by other methods. the procedure was repeated on another set of 125 individuals with hypertension, without other risk factors, aged between the 3rd and 7th decade. this time we found similar values to normotensive individuals only on the 3th decade, and a pronounced increase on the velocity coefficient at advanced ages was observed. these findings support the feasibility of using this type of signals to indirectly evaluate the propagation velocity together with the increase index, a parameter commonly used in pulse wave analysis.
Metabolic syndrome is associated with change in subclinical arterial stiffness - A community-based Taichung Community Health Study
Chia-Ing Li, Sharon LR Kardia, Chiu-Shong Liu, Wen-Yuan Lin, Chih-Hsueh Lin, Yi-Dar Lee, Fung-Chang Sung, Tsai-Chung Li, Cheng-Chieh Lin
BMC Public Health , 2011, DOI: 10.1186/1471-2458-11-808
Abstract: Brachial-ankle pulse wave velocity (baPWV), a measurement interpreted as arterial stiffness, was measured in 1518 community-dwelling persons at baseline and re-examined within a mean follow-up period of 3 years. Multivariate linear regression with generalized estimating equations (GEE) were used to examine the longitudinal relationship between MetS and its individual components and baPWV, while multivariate logistic regression with GEE was used to examine the longitudinal relationship between MetS and its individual components and the high risk group with arterial stiffness.Subjects with MetS showed significantly greater baPWV at the end point than those without MetS, after adjusting for age, gender, education, hypertension medication and mean arterial pressure (MAP). MetS was associated with the top quartile of baPWV (the high-risk group of arterial stiffness, adjusted odds ratio [95% confidence interval] 1.52 [1.21-1.90]), and a significant linear trend of risk for the number of components of MetS was found (p for trend < 0.05). In further considering the individual MetS component, elevated blood pressure and fasting glucose significantly predicted a high risk of arterial stiffness (adjusted OR [95% CI] 3.72 [2.81-4.93] and 1.35 [1.08-1.68], respectively).MetS affects the subject's progression to arterial stiffness. Arterial stiffness increased as the number of MetS components increased. Management of MetS is important for preventing the progression to advanced arterial stiffness.Metabolic syndrome (MetS), defined as a cluster of features such as visceral obesity, impaired glucose tolerance, dyslipidemia, hypergtriglyceridemia, and elevated blood pressure [1,2], is highly prevalent all over the world [3-12]. MetS has been known as a critical risk factor in the incidence of type 2 diabetes and in cardiovascular outcome [1,13,14]. People with MetS have higher all-cause or cardiovascular mortality than those without MetS [15-17]. Arterial stiffness, a pathological co
Two-point Method for Arterial Local Pulse Wave Velocity Measurement by Means of Ultrasonic RF Signal Processing
Zbigniew Trawiński
Archives of Acoustics , 2010, DOI: 10.2478/v10168-010-0001-9
Abstract: The aim of this paper is to describe a non-invasive method of examination of the local pulse wave velocity. The measurements were carried out in the model of the artery immersed in a water tank. Two synchronized ultrasonic apparatus VED with the ultrasonic radio frequency echoes acquisition system were used for evaluation of the arterial elasticity. The zero-crossing method was used for determination of the diameter changes of the artery model. The transit time between the waveforms of instant artery diameter was measured at two points of the artery model, separated by the distance of 5 cm. The transit time was determined using the criteria of similarity of the first derivatives of the raising slopes of the curves describing instant vessel's diameter changes. The pulse wave velocity obtained by the proposed two-point method was compared with the results obtained by the one-point method based on the modified Bramwell-Hill relation.
Brachial-ankle pulse wave velocity is an independent predictor of carotid artery atherosclerosis in the elderly
Jia-Yue Li,Yu-Sheng Zhao
老年心脏病学杂志(英文版) , 2010,
Abstract: Objective Brachial-ankle pulse wave velocity (BAPWV) is widely used as a simple noninvasive measure of arterial stiffness. The aim of this study was to evaluate the usefulness of BAPWV as a predictor of the carotid artery atherosclerosis in the elderly. Methods A total of 721 elderly participants (mean ± SD, 70.3 ± 5.6years) were enrolled in the current study. All participant underwent both BAPWV measurement and B-mode ultrasound for the intima-media thickness. Carotid atherosclerosis (CAS) was defined as the present of carotid plaque or and/or intima media thickness for at least 1.1 mm. Results A multivariate logistic regression analysis reveals that age, sex, brachial-ankle pulse wave velocity, smoking and LDL-C level showed a significant correlation with the presence of CAS. The odds ratios of CAS associated with a 500 cm/s increase of brachial-ankle pulse wave velocity were 2.378 [95% confidence interval, 1.36 to 4.00, P < 0.05], 3.733 [95% confidence interval, 1.729 to 8.058, P < 0.01], 4.438 [95% confidence interval, 1.659 to 11.803, P < 0.01]. The BAPWV significantly correlated with IMT by bivariate correlation analysis (r = 0.39; P = 0.001). After adjusting for factors influencing, BAPWV all the same correlated with IMT (r = 0.35; P = 0.001). Conclusion These results indicate that brachial-ankle PWV is an independent predictor of CAS in the elderly.It also means that the direct measurement of arterial stiffness by this simple method may be of great help for the evaluation of carotid artherosclerosis , at least in the elderly.
A family history of diabetes is not associated with arterial stiffness in non-diabetic Japanese population  [PDF]
Hirokazu Uemura, Sakurako Katsuura-Kamano, Miwa Yamaguchi, Mariko Nakamoto, Mineyoshi Hiyoshi, Fusakazu Sawachika, Kokichi Arisawa
Open Journal of Epidemiology (OJEpi) , 2013, DOI: 10.4236/ojepi.2013.34026
Abstract: Prevalent diabetes is at high risk for cardiovascular diseases and has a high familial inheritance. However, little is known whether a non-diabetic subject with a family history of diabetes is at high risk for vascular damage or not. The purpose of this study was to evaluate the association between a family history of diabetes and arterial stiffness in adult non-diabetic Japanese population. We analyzed eligible 787 non-diabetic subjects (502 men and 285 women) aged 35-69 years who enrolled in the baseline survey of a cohort study in Tokushima Prefecture, Japan and who underwent a brachial-ankle pulse wave velocity (ba-PWV) measurement. Information on individual life-style characteristics including medical history and treatment for diseases and a first-degree family history of diabetes was obtained through a structured self-administered questionnaire. Analysis of covariance and logistic regression analyses were used to evaluate the association between a family history of diabetes and ba-PWV. We found no differences in age-and-systolic blood pressure-adjusted and multivariate-adjusted means of ba-PWVs between subjects of both sexes with and without a family history of diabetes. Logistic regression analyses including both sexes also revealed that subjects with a family history of diabetes showed no differences in age-and-systolic blood pressure-adjusted and multivariate-adjusted odds ratios for high ba-PWV compared to those without that trait. Our results suggest that a family history of diabetes itself is not associated with arterial stiffness in adult non-diabetic Japanese population.

 

The number of antihypertensive agents simply reflects the grade and the risk of atherosclerosis in patients with type 2 diabetes mellitus  [PDF]
Hiroyuki Ito, Mariko Abe, Masahiro Shinozaki, Takashi Omoto, Shinya Nishio, Masahide Furusho, Shinichi Antoku, Mizuo Mifune, Michiko Togane, Tsutomu Sanaka
Journal of Diabetes Mellitus (JDM) , 2013, DOI: 10.4236/jdm.2013.34025
Abstract:

Aims: The associations between the number of antihypertensive agents being taken by type 2 diabetic patients and 1) the grade of atherosclerosis according to non-invasive surrogate markers for atherosclerosis and 2) the other risk factor for atherosclerosis, were cross-sectionally investigated. Methods: The association between the blood pressure control and the clinical characteristics was evaluated in 1359 patients with type 2 diabetes mellitus. Results: The number of antihypertensive agents was 1.5 ± 1.4 (2.0 ± 1.2 among the 990 patients with hypertension). The proportion of patients taking no antihypertensive agents was 29%, 22% were taking one, 29% were taking two and 21% of the patients were taking three or more antihypertensive agents. The value of the ankle-brachial pressure index significantly decreased with the increase in the number of antihypertensive agents even if the blood pressure was corrected to the target value. The values of brachial-ankle pulse wave velocity and carotid intima-media thickness were also increased. The prevalence of risk factors for atherosclerosis, such as obesity, hyperlipidemia, chronic kidney disease, hyperuricemia and anemia was significantly elevated with the number of agents. Conclusions: The number of antihypertensive agents simply reflects the grade and risk of atherosclerosis in patients with type 2 diabetes mellitus.


Cardiometabolic Phenotype and Arterial Stiffness in HIV-Positive Black African Patients  [PDF]
Daniel Lemogoum, William Ngatchou, Philippe Van De Borne, Valérie Ndobo, Marc Leeman, Euloge Yagnigni, Emiline Tiogou, Elisabeth Nga, Charles Kouanfack, Luc Van Bortel, Jean-Paul Degaute, Michel P. Hermans
Open Journal of Preventive Medicine (OJPM) , 2014, DOI: 10.4236/ojpm.2014.44024
Abstract:

Objective: To test the hypothesis that Human Immunodeficiency Virus (HIV) infection in Black patients is associated with increased cardiometabolic risk factors that may increase aortic stiffness assessed by pulse wave velocity (PWV). Methods: We matched 96 Cameroonian Controls to 238 (Un) treated HIV-positive patients [HIV] for age. In each participant, aortic PWV (ComplioR), blood pressures (BP), lipid profile and fasting blood glucose (FPG) were measured. Results: Waist circumference was lower in HIV than in Controls (both p < 0.001). The prevalences of impaired FPG (100-125 mg·dl-1), and of diabetes (FPG > 125 mg·dl-1

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