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Pulsewave velocity

Shubha Ananthakrishnan, George A Kaysen
Lipoprotein abnormalities such as low levels of high-density lipoprotein (HDL) and high triglycerides (TGs), associated with the metabolic syndrome, are also associated with subsequent decline in kidney function. Patients with end-stage kidney disease also exhibit low HDL and high TGs and a modest reduction in low-density lipoprotein (LDL), although the mechanisms responsible for these changes differ when patients with end-stage kidney disease are compared with those having metabolic syndrome with normal kidney function, as do lipoprotein structures...
July 2016: Advances in Chronic Kidney Disease
Jie Cao, Hai-ya Wang
OBJECTIVE: To investigate the association between plasma total antioxidant status (TAS) and association with brachial-ankle pulsewave velocity (baPWV) in the elderly patients with essential hypertension(EH). METHODS: A total of 133 consecutive EH patients older than 60 years were enrolled and another 92 elderly non-EH healthy subjects served as control. According to blood pressure level, EH patients were further classified into three subgroups. The concentration of plasma total antioxidant status was measured by using chemical luminescence method...
October 2013: Zhonghua Xin Xue Guan Bing za Zhi
Kevin C Harris, Hesham A Al Saloos, Astrid M De Souza, Shubhayan Sanatani, Mary Hinchliffe, James E Potts, George G S Sandor
We sought to determine whether childhood obesity is associated with increased aortic stiffness by measuring the biophysical properties of the aorta in obese children using a noninvasive echocardiographic Doppler method. Increased aortic stiffness is a strong predictor of future cardiovascular events and mortality in adults. Obesity is known to be associated with increased aortic stiffness and arterial disease in adults. We prospectively evaluated a cohort of obese children (n = 61) and compared them to normal-weight controls (n = 55)...
September 15, 2012: American Journal of Cardiology
Ronak Rajani, Helen Rimington, Adam Nabeebaccus, Philip Chowienczyk, John B Chambers
BACKGROUND: Changes in the peripheral vasculature occur in patients with aortic stenosis (AS). The aims of the present study were to characterize peripheral arterial waveforms and aortic pulsewave velocity (PWV) in patients with AS and to determine their relationship to exercise time. METHODS: The study included 101 patients with a median age of 68 years (range, 27-84 years) with at least moderate AS. Patients underwent transthoracic echocardiography, an assessment of the radial artery waveform and PWV using a SphygmoCor device, and a treadmill exercise stress test...
June 2012: Journal of the American Society of Echocardiography
T Ando, S Okada, Y Niijima, K Hashimoto, H Shimizu, T Tsuchiya, M Yamada, K Ohshima, M Mori, K Ono
AIMS: The study aimed to investigate early-stage atherosclerosis in patients with impaired fasting glucose compared with patients with impaired glucose tolerance. METHODS: Body mass index, systolic blood pressure, fasting plasma glucose, lipid variables, ankle-brachial pressure index and brachial-ankle pulse wave velocity were measured in 2842 subjects from Takasaki city located approximately 100 km north of Tokyo in Japan. The subjects were divided into the following five groups based on a 75-g oral glucose tolerance test: (i) normal fasting plasma glucose/normal glucose tolerance group, (ii) impaired fasting glucose group, (iii) impaired glucose tolerance group, (iv) combined glucose intolerance group and (v) diabetic glucose intolerance group...
December 2010: Diabetic Medicine: a Journal of the British Diabetic Association
Patricia C E de Groot, Dick Thijssen, Matthijs Binkhorst, Daniel J Green, Michiel Schokking, Maria T E Hopman
We compared the endothelial function and vascular wall characteristics of 11 children with tetralogy of Fallot (TOF) (age 13 +/- 3 years) with the characteristics of 17 age-matched peers (12 +/- 2 years). Echocardiographic Doppler measurements were performed under standardized conditions to assess (1) the carotid and femoral artery diameter and intima-media thickness, (2) brachial artery endothelial function using flow-mediated dilation, and (3) central and peripheral compliance using pulsewave velocity. In addition, the physical activity level was assessed using a validated questionnaire...
September 15, 2010: American Journal of Cardiology
Mark Rakobowchuk, Melanie I Stuckey, Philip J Millar, Lindsay Gurr, Maureen Jane Macdonald
Peripheral arterial distensibility is improved with sprint interval exercise training in young healthy participants (Rakobowchuk et al. in Am J Physiol Regul Integr Comp Physiol 295:R236-R242, 2008). To fully understand the mechanisms contributing to these training effects it is useful to examine the acute responses to sprint interval exercise. Following supine rest, nine healthy males completed either a single sprint interval (Wingate test) or a multiple sprint interval exercise session (4 Wingate tests each separated by 4...
March 2009: European Journal of Applied Physiology
Kevin J Nickel, Luke S Acree, Polly S Montgomery, Andrew W Gardner
The purpose was to identify the association between lower-extremity function and arterial compliance in older men and women. Participants included 46 healthy men (n = 18) and women (n = 28) 60 years of age or older. Lower-extremity functional performance was assessed by the summary performance score (SPS) that includes tests of 5 timed repeated chair rises, standing balance, and 4-meter walking velocity. Arterial compliance and arterial pressure were analyzed through pulsewave analysis. Small arterial compliance (3...
April 2008: Angiology
Enrico Arosio, Sergio De Marchi, Anna Rigoni, Manlio Prior, Pietro Delva, Alessandro Lechi
OBJECTIVES: Cardiovascular disease is the major cause of mortality in patients with rheumatoid arthritis. This work studied the presence of impaired forearm haemodynamics, arterial stiffness and microcirculatory reactivity in young women with rheumatoid arthritis. METHODS: Sixty-five women aged 41-52 years, with rheumatoid arthritis, were screened for the absence of common cardiovascular risk factors. They underwent laser Doppler study on the hand at rest and after ischaemia, endothelium-dependent dilation with colour Doppler ultrasound and pulsewave velocity (PWV)...
June 2007: Journal of Hypertension
Anette S Fjeldstad, Cecilie Fjeldstad, Luke S Acree, Kevin J Nickel, Polly S Montgomery, Philip C Comp, Thomas L Whitsett, Andrew W Gardner
The purpose of this study was to examine the effects of metabolic syndrome (MS) features on arterial elasticity of the large and small arteries in apparently healthy adults, to examine the effect of clustered features of MS, and to determine which features are most predictive of large and small artery elasticity. The subjects for this study consisted of 126 men and women, age 45 years and older. The subjects rested supine while pulse contour analysis was measured from the radial artery by using an HDI/Pulsewave CR-2000 instrument (Hypertension Diagnostic, Inc) to assess arterial elasticity in the large and small arteries...
February 2007: Angiology
J Y A Foo, S J Wilson
Understanding arterial distensibility has shown to be important in the pathogenesis of cardiovascular abnormalities like hypertension. It is also known that arterial pulse wave velocity (PWV) is a measure of the elasticity or stiffness of peripheral arterial blood vessels. However, it generally requires complex instrumentations to have an accurate measurement and not suited for continual monitoring. In this paper, it describes a simple and non-intrusive method to detect the cardiovascular pulse from a human wrist above the radial artery and a fingertip...
2005: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
Richard J Woodman, Bronwyn A Kingwell, Lawrence J Beilin, Sarah E Hamilton, Anthony M Dart, Gerald F Watts
BACKGROUND: Several new techniques exist for measuring arterial stiffness, but their association with central pulse wave velocity (PWV), an established measure of central arterial stiffness, has not been compared in the same study. The aim of this study was to compare the agreement of the new techniques with central PWV. METHODS: Fifteen men with coronary artery disease (59 +/- 2 years of age) and 15 healthy men (28 +/- 1 years of age) were recruited. The following measures were performed in a random sequence and repeated after 1 week: central and distal pulse wave velocity (PWV), large and small artery compliance (C1 and C2, respectively), and stroke volume/pulse pressure (SV/PP) (measured by HDI/PulseWave CR-2000), augmentation index (AIx) and central pulse pressure (CPR) (Sphygmocor), stiffness index (SI) (Micro Medical Pulse Trace), systemic arterial compliance (SAC) (area method), and brachial PP (Dinamap)...
February 2005: American Journal of Hypertension
Moutasim H Al-Shaer, Geetha Raghuveer, Roger Browning, Christine A Sinkey, Catherine Chenard, Phyllis Stumbo, William G Haynes
Homocysteine may contribute to systolic hypertension and cardiac events by decreasing conduit artery compliance and inducing endothelial dysfunction. The effects of the experimental induction of hyperhomocysteinemia on systemic arterial compliance and pulsewave velocity are unclear, with contradictory results from previous studies. The investigators tested whether oral methionine impairs brachial artery compliance in addition to endothelial function.
February 1, 2005: American Journal of Cardiology
Stavros Loukogeorgakis, Rex Dawson, Nirree Phillips, Christopher N Martyn, Stephen E Greenwald
We aimed to validate a new method for measuring arterial pulsewave transit time and pulsewave velocity (a measure of arterial elasticity), based on the principle of photoplethysmography (PPG), and to compare transcutaneous values with those obtained by intra-arterial measurements. Three validation experiments are described. (a) PPG pulse wave delay times (defined as the time interval between the ECG R wave and the foot of the arterial pulse wave measured at the wrist or ankle) were compared to values obtained simultaneously from an established methodology (Doppler ultrasound)...
August 2002: Physiological Measurement
S Vogt, D Troitzsch, B Kusch, R Moosdorf
Pulsewave velocity analysis is an option for the noninvasive determination of cardiac output and the evaluation of additional haemodynamic parameters. An algorithm we developed ourselves has been established as a method for the measurement of cardiac output in rabbits. The effectiveness of this program was investigated by monitoring controlled hypoxia-induced alterations in the circulatory system. Calculated values were compared with direct measurements of cardiac output with a Doppler flow probe placed in the ascending aorta...
May 2001: Biomedizinische Technik. Biomedical Engineering
B D Bolster, J M Serfaty, E Atalar
A one-dimensional intravascular MR (IVMR) technique for the measurement of pulsewave velocity in a single cardiac cycle is presented. The technique was used to measure pulsewave velocity in vivo in the intact rabbit model, where its sensitivity to different hemodynamic states was demonstrated using a pharmacological intervention with phenylephrine and nitroprusside. IVMR measurements of pulsewave velocity were found to increase with mean arterial pressure, as expected. Further, IVMR-based pulsewave velocity estimates were in agreement with those measured by pressure catheters and direct distensibility measurement...
January 2001: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
M Moser, M Lehofer, R Hoehn-Saric, D R McLeod, G Hildebrandt, B Steinbrenner, M Voica, P Liebmann, H G Zapotoczky
A clinical study was conducted to examine the effects of depression on cardiac autonomic control. Cardiac autonomic control was measured in 26 nonmedicated patients (19 females) suffering from Major Depression, melancholic type, and in 26 age- and sex-matched normal controls. We measured heart rate and high frequency heart rate variability (respiratory sinus arrhythmia), pulsewave velocity and blood pressure, during 10 min of supine rest under controlled conditions. Using a log transformed time domain measure of respiratory sinus arrhythmia (logRSA), we found an inverse linear dependence between cardiac vagal tone and age in the healthy subjects as well as the depressed patients...
March 1998: Journal of Affective Disorders
M Bock, L R Schad, E Müller, W J Lorenz
A new, one-dimensional method for the measurement of pulsewave velocities using real-time magnetic resonance (MR) imaging is presented. The measurement sequence is essentially of a RACE-type (Real Time Acquisition and Evaluation) with interleaved acquisition in two not necessarily parallel slices. In each slice the blood flow velocity perpendicular to the slice orientation was monitored. From the relative time difference of blood flow activity and the slice distance, pulsewave velocities were calculated. With a time resolution of 13 ms an overall acquisition time of 3...
1995: Magnetic Resonance Imaging
K H Wesseling, B de Wit, J E Beneken
No abstract text is available yet for this article.
November 1973: Medical & Biological Engineering
J Alexander, D Burkhoff, J Schipke, K Sagawa
The present investigation sought to determine the extent to which primary changes in mean arterial pressure (MAP) might influence the calculated aortic impedance. In seven open-chest, anesthetized, autonomically blocked dogs, we measured aortic impedance using white-noise analysis at various levels of MAP achieved by adjusting the height of a left atrial reservoir rather than by pharmacological intervention. Impedance spectra so obtained were parameterized according to best-fit wind-kessel models (Ra, Rc, Ca) and three parameters to characterize wave reflections: the frequency at which the phase of the impedance approached or crossed through 0 degree (phi 0), the frequency of the first minimum of the impedance modulus (fmin), and the amplitude of the first oscillation of the impedance modulus (a 1)...
September 1989: American Journal of Physiology
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