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Kenny Damien - - 2010
BACKGROUND: Increased arterial stiffness is linked to hypertension in adults after surgical repair for coarctation of the aorta. We evaluated the influence of surgical approaches, namely, subclavian flap repair (SFR) and end-to-end anastomosis (EEA), on arterial stiffness, blood pressure, cardiac output, and cardiac baroreceptor function in a cohort of young ...
Punj Jyotsna - - 2010
We present a case of ischemic changes after application of an adult pulse oximeter probe in an infant for a short period of only 10 min. To understand the physiology behind this mishap, we studied pressure exerted by the adult pulse oximeter probe on simulated fingers (fluid-filled pouches), which were ...
Mannelli Lorenzo - - 2010
OBJECTIVE: The purpose of this article is to establish the range of normal splenic stiffness in healthy volunteers using MR elastography (MRE) and to investigate any correlation with physiologic parameters and driver position. SUBJECTS AND METHODS: Sixteen volunteers (mean [+/- SD] age, 37 +/- 9 years) with no history of ...
Safar Michel E - - 2010
Arterial aging can be attributed to two different pathophysiological changes--increase in arterial stiffness and disturbed wave reflections. The capacity of the aorta to absorb the force exerted by the left ventricular ejection and dampen pulsatile flow becomes diminished with advancing age, owing to the progressive hardening of the arterial wall. ...
Vitarelli Antonio - - 2010
Aortic stiffness may be associated with an increased incidence of cardiovascular events and has been reported to be related to arterial wall motion velocities as measured by tissue Doppler imaging. To investigate the potential clinical application of tissue Doppler imaging (TDI) for assessment of aortic function parameters in healthy and ...
Figueroa Arturo - - 2011
Oral L-citrulline is efficiently converted to L-arginine, the precursor for endothelial nitric oxide (NO) synthesis. Oral L-arginine supplementation reduces brachial blood pressure (BP). We evaluated the effects of watermelon supplementation on aortic BP and arterial function in individuals with prehypertension. Heart rate (HR), brachial systolic BP (bSBP), brachial pulse pressure ...
Löcsey L - - 2010
Arterial stiffness is an independent cardiovascular risk factor, along with aging, hypertension, and cardiovascular disease. The augmentation index (AIx) and pulse wave velocity (PWV) are early markers of atherosclerotic vascular changes. Arteriography was used to determine systolic and diastolic blood pressure, pulse pressure (PP), AIx, and PWV in 82 male ...
Philips J-C - - 2010
We assessed changes in pulse pressure and heart rate during a squatting test, as indirect markers of arterial stiffness and cardiovascular autonomic neuropathy, respectively, according to age and sex in patients with Type 1 diabetes mellitus. We evaluated 160 diabetic patients, divided into four groups of 20 men and 20 ...
Pizov Reuven - - 2010
BACKGROUND: Respiratory-induced arterial and plethysmographic (pulse oximetry) waveform changes were shown to be good predictors of cardiac output response to increased preload. The aim of this study was to evaluate the reliability of arterial and plethysmographic waveform variables in patients with mild hypovolemia. METHODS: Patients undergoing autologous hemodilution were studied. ...
Madrid Mary M - - 2010
The purpose of this pilot study was to determine whether Therapeutic Touch (TT) can be effectively used in the operative setting and whether it could produce positive outcomes in the period from cerebral angiography to discharge. The specific outcomes to be assessed were blood pressure, pulse, and respirations. TT is ...
Olson Storrs L - - 2010
During the last half million years, pulses of gigantism in the anagenetic lineage of land snails of the subgenus Poecilozonites on Bermuda were correlated with glacial periods when lower sea level resulted in an island nearly an order of magnitude larger than at present. During those periods, the island was ...
Kumar Ajit - - 2010
We studied the effect of pressure variation on intrapulse Raman scattering for a single-cycle and few-cycle pulses in a gas cell of a given length filled with gaseous deuterium, in the framework of a new model equation that goes beyond the slowly varying envelope approximation. We show that, for a ...
McEniery Carmel M CM Clinical Pharmacology Unit, University of Cambridge, Addenbrooke's Hospital, Box 110, Cambridge CB2 0QQ, UK. - - 2010
Arterial stiffness is an important determinant of cardiovascular risk. The precise risk factors for arterial stiffening remain unclear. We aimed to identify potential risk factors using prospective exposure data from the Caerphilly Prospective Study. Aortic pulse wave velocity and augmentation index were measured in 825 men and related to current ...
Olsson Erik - - 2010
We studied photoacoustic waves using pulsed digital holography. The acoustic waves were generated in a reindeer blood target by absorption of an IR laser pulse, lambda=1064 nm and pulse length=12 ns. The acoustic pressure waves were then imaged in water using a second collimated laser pulse at lambda=532 nm 2 ...
Lee Chih-Hsin - - 2010
BACKGROUND: Pulse contour-derived cardiac output for continuous hemodynamic monitoring is becoming popular in critical care. However, the data regarding its reliability during acute hemodynamic instability are inconsistent. This study was conducted to determine whether pulse contour-derived cardiac output truly reflects rapid hemodynamic changes. METHODS: Hemorrhagic shock was created in seven ...
Archer Thomas L - - 2010
A 23 year-old woman with chronic hypertension, focal segmental glomerular sclerosis with chronic renal insufficiency, and superimposed severe preeclampsia, required cesarean delivery. The patient's course was also complicated by severe hyperkalemia and hypermagnesemia. "PulseCO" pulse contour analysis of a directly measured radial artery pressure tracing, without lithium calibration, enabled her ...
Tsiachris Dimitris - - 2010
OBJECTIVES: We sought to investigate the plausible interrelationship of exaggerated blood pressure response during exercise (EBPR) with ambulatory arterial stiffness index (AASI) in never-treated patients with uncomplicated essential hypertension. METHODS: Ninety-nine never-treated hypertensive patients (aged 50.7 years, 61 male) underwent 24 h ambulatory blood pressure (BP) recording, complete echocardiographic study ...
Moon Jeonggeun - - 2010
BACKGROUND: Some aortic aneurysm (AA) or aortic dissection (AD) patients can be observed to detect disease progression if optimal blood pressure is achieved. However, in another group of patients, disease progression occurs despite well-controlled blood pressure. The aim of this study was to determine the prognostic value of central aortic ...
Hahn Jin-Oh - - 2010
This paper presents a novel method to estimate the aortic-to-peripheral pulse transit time (PTT) using the blood pressure waveforms measured at two diametric peripheral locations, for instance, one on an upper extremity and the other on a lower extremity. The method is based on a computational relationship between the two ...
Hemalatha K - - 2010
A comprehensive model, which has the advantages of both lumped parameter and distributed parameter, has been developed with the objective of investigating the respiratory influences in radial artery pressure pulse as in photoplethysmography (PPG). It integrates lumped parameter cardiopulmonary (CP) model and transmission line arterial tree model from aorta to ...
Vlachopoulos Charalambos - - 2010
Regular aerobic exercise has beneficial effects on the cardiovascular system. Marathon running is an aerobic and extremely vigorous exercise. Arterial stiffness and wave reflections are independent predictors of cardiovascular risk. We investigated the acute effect of marathon race on aortic stiffness and wave reflections, as well as possible chronic alterations ...
Wagner Daniel R - - 2010
Pulse transit time (PTT), the interval between ventricular electrical activity and arrival of the peripheral pulse wave, has been used to detect changes in autonomic tone during sleep and anesthesia. The purpose of this study was to evaluate PTT in patients with chronic heart failure (HF). Pulse transit time was ...
Cannesson Maxime - - 2010
INTRODUCTION: R-wave obtained from the electrocardiogram depends on ventricular stroke volume. We assessed the relationship between respiratory variations in R-wave (DeltaRDII) and in pulse pressure (DeltaPP) during general anesthesia. METHOD: R-wave amplitude was measured from standard lead II (RDII). Maximal RDII (RDIImax) and minimal RDII (RDIImin) were determined over one ...
Goertz David E - - 2010
Ultrasound-stimulated microbubbles are currently under investigation as a means of transiently disrupting the blood-brain barrier (BBB) and it has been shown that the strength of this effect is highly dependent on ultrasound exposure conditions. The objective of this study was to investigate the potential for contrast agent destruction in the ...
Javed Fahad - - 2010
Increase in pulse pressure has been shown to be predisposing factor for Coronary Artery Disease (CAD) in diverse patient populations but its relationship with the severity of CAD, particularly in the South Asians immigrant population of United States has not been demonstrated. We performed a single-center, cross-sectional study. Pulse pressure ...
Adamopoulos Dionysios - - 2010
BACKGROUND: Arterial stiffness and wave reflection alterations may be implicated in the association between cardiovascular mortality, meteorological variables and ambient particulate matter air pollution. The present study explored the cross-sectional relations between ambient environmental parameters, arterial stiffness, peripheral and central hemodynamics in a large-scale cohort of hypertensive patients and normotensive ...
Swierblewska Ewa - - 2010
OBJECTIVE: Carotid-femoral pulse wave velocity (PWV) has been shown to be a powerful predictor of cardiovascular morbidity and mortality. Sympathetic neural mechanisms may have a stiffening influence on arterial mechanical properties. The relationship between direct measures of sympathetic traffic and PWV in healthy humans has not been previously studied. We, ...
Nelson Matthew R MR Division of Preventive, Occupational and Aerospace Medicine, Mayo Clinic, 13400 E Shea Blvd, Scottsdale, AZ 85259, - - 2010
The arterial pulse has historically been an essential source of information in the clinical assessment of health. With current sphygmomanometric and oscillometric devices, only the peak and trough of the peripheral arterial pulse waveform are clinically used. Several limitations exist with peripheral blood pressure. First, central aortic pressure is a ...
Morioka Norikatsu - - 2010
Augmentation index (AI), brachial-ankle pulse wave velocity (baPWV) and cardio-ankle vascular index (CAVI) are available for the assessment of arterial stiffness in clinical practices. However, influences of meal intake on these indices are still poorly understood. The aim of this study is to elucidate the effects of daily meal intake ...
Rodilla Enrique - - 2010
BACKGROUND AND OBJECTIVES: The purpose of the present study was to assess the relationship of arterial stiffness with other markers of target organ damage, and the clinical factors related to it. PATIENTS AND METHODS: Cross-sectional study that included 208 (115 men) never treated hypertensive, non-diabetic patients (mean age, 49+/-12 years). ...
Lieber Ari - - 2010
Augmentation index (AIx), a marker of the number of aortic wave reflections (AWRs), is influenced not only by the magnitude of incident and reflected pressure waves but also by the time of return. A new triangulation method has been developed, enabling us to better quantify AWRs and to determine their ...
Donsì Giorgio - - 2010
The use of pulsed high hydrostatic pressure was investigated as a possible approach to stabilize foodstuffs. The objective of this article was to investigate the effect of the main processing variables (pressure [150 to 300 MPa], temperature levels [25 to 50 degrees C], and pulse number [1 to 10]) on ...
Weber Thomas - - 2010
Pulse waveform characteristics (Augmentation Index--AIx and pulse wave transit time) are measures of the timing and extent of arterial wave reflections. Although previous studies reported an independent association with cardiovascular morbidity, it remains to be established that waveform characteristics, derived from noninvasive pulse waveform analysis, predict cardiovascular outcomes independent of ...
Chung Jin Wook - - 2010
Arterial stiffness is a precursor to premature cardiovascular disease. The augmentation index (AI) and pulse pressure (PP) are cardiovascular risk factors. The aim of this study was to define the diagnostic values of the AI and PP from the peripheral arterial and central aortic waveforms in healthy subjects. We recruited ...
Cheng Hao-Min - - 2010
Current noninvasive techniques for assessing central aortic pressure require the recording of an arterial pressure wave using a high-fidelity applanation tonometer. We therefore developed and validated a novel method to estimate the central aortic systolic pressure using an oscillometric blood pressure monitor alone. Invasive high-fidelity right brachial and central aortic ...
Wassertheurer S - - 2010
In the European Society of Cardiology-European Society of Hypertension guidelines of the year 2007, the consequences of arterial stiffness and wave reflection on cardiovascular mortality have a major role. But the investigators claimed the poor availability of devices/methods providing easy and widely suitable measuring of arterial wall stiffness or their ...
Mulè Giuseppe - - 2010
The aim of our study was to assess the independent relationships of urinary albumin excretion rate (AER), of creatinine clearance (CrCl) and of their interaction with aortic stiffness in hypertensive patients without overt renal insufficiency. We studied 222 untreated nondiabetic essential hypertensives. In patients with reliable 24-h urine collections, AER ...
Bauner Kerstin - - 2010
To assess diastolic function in patients with constrictive pericarditis (CP) by using velocity-encoded flow measurements at the atrioventricular valves and to evaluate whether conclusions regarding increased ventricular pressure can be drawn. Twenty-two patients with CP and 20 healthy subjects were examined on a 1.5-T MR system. In addition to evaluation ...
Brody Stuart - - 2010
INTRODUCTION: A growing literature links aspects of sexual and cardiovascular function. Recent research revealed that pulse pressure (systolic minus diastolic) was associated with poorer erectile function (and hypogonadism) in male patients with erectile dysfunction. It is unclear to what degree pulse pressure (and body mass index) would be associated with ...
Turner Joseph A - - 2010
The interaction of blast waves with the human head is complicated by many factors including the geometry, material nonlinearities, and skull microstructure. In particular, the flat bones of the skull are comprised of the outer and inner tables (cortical bone) and the diploe (trabecular bone) on the interior. This microstructure ...
Raff Ulrike - - 2010
OBJECTIVE: We examined the value of renal resistive index (RRI) for prevalence of cardiovascular target organ damage in therapy-resistant hypertension in comparison to low-grade albuminuria. METHODS: Eighty-four patients with therapy-resistant hypertension (age 59.7 +/- 8.1 years) were screened for cardiovascular target organ damage with coronary computed tomography, cardiac magnetic resonance ...
Smulyan Harold - - 2010
BACKGROUND: Central aortic systolic blood pressures (SBPs) differ from and are preferable to cuff pressures when calculating cardiac work, left ventricular wall stress, and rate-pressure product. Despite the widespread use of dobutamine, differences between aortic and brachial SBP (pulse amplification) and pulse transmission during dobutamine infusion have not been previously ...
Smith Nathan - - 2010
The third-generation electromagnetic (EM) shock wave lithotripters often have narrow focal width and high-peak pressure compared to the original HM-3. In addition, the pressure waveform produced by a typical EM lithotripter has a secondary compressive wave that suppresses lithotripter pulse induced cavitation, which is an important mechanism for stone comminution. ...
Petrák Ondrej - - 2010
The aim of the study was to evaluate arterial stiffness and its modulating factors measured by carotid-femoral pulse wave velocity (PWV) and central augmentation index (AI) in patients with pheochromocytoma (PHEO) before and after surgery. Forty-five patients with PHEO and 45 healthy controls were investigated using an applanation tonometer (SphygmoCor, ...
Soltner Christophe - - 2010
OBJECTIVE: The amplitude of R-wave in DII lead (RDII) has been shown to correlate to central blood volume in animal and healthy volunteers. The aim of this study was to assess if change in RDII (DeltaRDII) after passive leg rise (PLR) and fluid loading would allow detecting preload dependence in ...
Trachet B - - 2010
Recently a new method has been proposed as a tool to measure arterial pulse wave velocity (PWV), a measure of the stiffness of the large arteries and an emerging parameter used as indicator of clinical cardiovascular risk. The method is based on measurement of brachial blood pressure during supra-systolic pressure ...
Cay Serkan - - 2010
BACKGROUND: Almost the same pathophysiological mechanism has been suggested for both atherosclerosis and calcific aortic stenosis (AS). In this study, we examined any association between ascending aortic pressure-derived indices and hemodynamic characteristics of calcific AS. METHODS: A total of 90 patients were studied (26 males, 64 females; mean age: 64.4 ...
Ayer Julian G - - 2010
OBJECTIVES: Central arterial pulse wave augmentation, quantified by the augmentation index (AIx), is a key marker of arterial health, an important contributor to cardiac afterload and is significantly greater in older women than men. We measured carotid AIx in 8-year-old children to examine the influences of sex, height and arterial ...
McGrath Susan P - - 2011
The primary objective of this study was to determine whether alterations in the pulse oximeter waveform characteristics would track progressive reductions in central blood volume. We also assessed whether changes in the pulse oximeter waveform provide an indication of blood loss in the hemorrhaging patient before changes in standard vital ...
Mitchell Gary F GF Cardiovascular Engineering, Inc, 1 Edgewater Dr, Suite 201A, Norwood, MA 02062, USA. - - 2010
Various measures of arterial stiffness and wave reflection have been proposed as cardiovascular risk markers. Prior studies have not assessed relations of a comprehensive panel of stiffness measures to prognosis in the community. We used proportional hazards models to analyze first-onset major cardiovascular disease events (myocardial infarction, unstable angina, heart ...
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