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Xiang X - - 2013
Past studies have shown that catheter diameter is one of the device-dependent problems which influence the manometric results in the conventional water perfusion esophageal manometry. High-resolution solid-state manometry which abandons water perfusion is thought as an improved manometry method benefited from more pressure sensors, and it is gradually widely used ...
Verloop W L - - 2013
Hypertension is one of the most prevalent cardiovascular risk factors. Despite this high prevalence and a broad availability of effective pharmaceutical agents, a significant proportion of patients do not reach treatment goals. Partly this can be explained by secondary causes of hypertension or non-compliance of patients. Nevertheless, a subgroup of ...
Addington W Robert - - 2013
Introduction: The functions of the lower esophageal sphincter (LES) and internal urethral sphincter (IUS) have not been reported during voluntary and involuntary respiratory maneuvers. Methods: In this study we performed a prospective barium videofluoroscopy study (BSV) of the LES on 4 healthy adult men during voluntary cough (VC), laryngeal expiration ...
Tandon Teena - - 2013
BackgroundShorter delivered dialysis times are associated with increased all-cause mortality. Whether shorter delivered dialysis times also associate with an increase in blood pressure (BP) and reduce the ability of probing dry weight to lower BP is unclear.MethodsAmong patients participating in the Dry-Weight Reduction in Hypertensive Hemodialysis Patients (DRIP) trial, interdialytic ...
Lim Kyungjoon - - 2013
Feeding a high-fat diet (HFD) to rabbits results in increased blood pressure and renal sympathetic nerve activity (RSNA) and marked increases in plasma leptin and insulin. We determined the contribution of insulin and leptin signaling in the central nervous system to the increased blood pressure and RSNA during a HFD ...
Cheng Hao-Min - - 2013
BACKGROUND The superiority of prognostic value of blood pressure (BP) measured at central aorta (CBP) over conventional brachial BP measured by cuff-based BP monitors has reignited the development of new noninvasive techniques for estimating CBP. The present study validated the accuracy of CBP measured by a newly developed stand-alone CBP ...
Honarvar Mehrdad - - 2013
Hypertension (HTN) treatment has remained insufficient. New modalities such as "Symplicity method" for the treatment of HTN are a priority, especially in patients with resistant hypertension. In this study, we describe our first experience with a novel percutaneous treatment modality, without using Symplicity catheter. 30 Patients who were resistant to ...
Gundeti Manohar S - - 2013
Basti is one of the five procedures of panchakarma in Ayurveda. Classically, it is advocated in the diseases of vata. It is mainly of two types viz. asthapana and anuvasana. According to the classical texts basti administration is done with the help of animal bladder (bastiputaka) and specially prepared metal/wooden ...
Hatipoglu Emine - - 2013
Hypertension is a common disease associated with important cardiovascular complications. Persistent blood pressure of 140/90 or higher despite combined use of a reninangiotensin system blocker, calcium channel blocker and a diuretic at highest tolerated doses constitutes resistant hypertension. Excess sympathetic activity plays an important pathogenic role in resistant hypertension in ...
Warchoł-Celińska Ewa E Institute of Cardiology, Warsaw, - - 2013
Clinical trials have demonstrated that catheter-based renal denervation (RDN) reduces blood pressure and improves blood pressure control in patients with resistant hypertension. The follow-up data indicate that the blood pressure lowering effect of the procedure may last for up to 36 months. Despite the fact that RDN is a growing ...
Miller Larry S - - 2012
To explore whether patients with a defective ileocecal valve (ICV)/cecal distension reflex have small intestinal bacterial overgrowth. Using a colonoscope, under conscious sedation, the ICV was intubated and the colonoscope was placed within the terminal ileum (TI). A manometry catheter with 4 pressure channels, spaced 1 cm apart, was passed ...
Susantitaphong Paweena - - 2013
Chronic volume overload resulting from interdialytic weight gain and inadequate fluid removal plays a significant role in poorly controlled high blood pressure. Although bioimpedance has been introduced as an accurate method for assessing hydration status, the instrument is not available in general hemodialysis (HEMO) centers. This study was conducted to ...
Sharma Tushar - - 2013
We demonstrate the design of thin flexible pressure sensors based on piezoelectric PVDF-TrFE (polyvinyledenedifluoride-tetrafluoroethylene) co-polymer film, which can be integrated onto a catheter, where the compact inner lumen space limit the dimensions of the pressure sensors. Previously, we demonstrated that the thin-film sensors of one micrometer thickness were shown to ...
Ding Feng-Hua - - 2012
BACKGROUND:: We previously tested the accuracy of the SphygmoCor and Omron HEM-9000AI devices in the estimation of central blood pressure. In the present study, we investigated these two devices in the estimation of central-to-brachial pressure amplification against the invasive catheter measurement. METHODS:: In 33 individuals undergoing cardiac catheterization, we measured ...
Correa-Martín L - - 2012
OBJECTIVE: To study the effects on the renal system in a porcine model of intraabdominal hypertension, and to determine the indirect technique of choice for determination of the intraabdominal pressure. MATERIAL AND METHODS: 30 pigs were used divided in two groups according with increased intraabdominal pressure values (20mmHg and 30mmHg). ...
Ruilope Luis M - - 2012
Resistant hypertension is a frequent form of arterial hypertension that, with the exception of malignant hypertension, constitutes the most dangerous stage of arterial hypertension. Recently we have improved the detection, diagnosis, and therapy of resistant hypertensives. The technique of renal denervation with a catheter has improved the control of blood ...
Soltani Azita A R&D Department, EKOS Corporation, 11911 N Creek Parkway S, Bothell, WA 98011, USA. - - 2013
High frequency, low intensity ultrasound has the potential to accelerate the clearance of thrombotic occlusion in the absence of cavitation. At high frequency ultrasound, high acoustic pressures, >5.2MPa, are required to generate cavitation in thrombus. The focus of this study was to reduce the cavitation threshold by applying materials with ...
VAN DE Hoef Tim P - - 2012
Background : Myocardial reperfusion is frequently suboptimal after ST-segment elevation myocardial infarction (STEMI) treated by primary percutaneous coronary intervention (PCI). Using a balloon-tipped catheter positioned in the coronary sinus (CS), pressure-controlled intermittent coronary sinus occlusion (PICSO) results in an intermittent obstruction of coronary venous outflow of the left anterior descending artery ...
Cuculi Florim - - 2012
Catheter-based treatment of pulmonary embolism (PE) has been demonstrated to be successful in case reports and small series. The investigators report the results of a novel, pharmacomechanical approach with prolonged infusion of urokinase in the occluded pulmonary arteries (PAs). Manual aspiration of thrombus using guide catheters was followed by introduction ...
Lee Byung Kook - - 2012
PURPOSE: Endovascular cooling using the femoral cooling catheter is widely practiced. Central venous pressure (CVP) monitoring in patients undergoing femoral endovascular cooling may require the placement of another catheter near the right atrium (RA). We sought to estimate the agreement between the CVP recorded from catheters placed in the superior ...
Plumhans Cédric - - 2012
Completely implantable access ports for high pressure contrast media injection have been in use in clinical routine for a relatively short time. The purpose of our study was to compare a high pressure port system with a standard port system with regard to implantation and complications. In 94 oncological patients ...
Vidal Denham Lori - - 2012
Properties of a piezoelectric polymeric angioplasty balloon that may decrease the problems of acute closure and restenosis are evaluated in this study. Polyvinylidene difluoride (PVDF), a piezoelectric and pyroelectric polymer, has sufficient strength to serve as a standard angioplasty balloon as well as functioning as an ultrasonic transmitter and/or receiver. ...
Hussain Syed Aqeel - - 2012
To observe the safety of trans-jugular pressure-monitoring catheter insertion at a tertiary care teaching hospital in Rawalpindi, Pakistan. The observational study was carried out at the Armed Forces Institute of Cardiology/National Institute of Heart Diseases, Rawalpindi, from January 1, 2004 to March 31, 2010. All patients electively scheduled to undergo ...
Mueller Martin M - - 2012
Measurements of maximum urethral closure pressure (MUCP) are a part of urodynamic investigations preceding an incontinence surgery and a part of urethral function tests. The aim of the study was to compare maximum urethral closure pressure determined by a microtip catheter with those measured by an air-charged catheter. A prospective ...
Colah S - - 2012
We describe a cost-effective, reproducible circuit in a porcine, ex vivo, continuous warm-blood, bi-ventricular, working heart model that has future possibilities for pre-transplant assessment of marginal hearts donated from brain stem dead donors and hearts donated after circulatory determination of death (DCDD).In five consecutive experiments over five days, pressure volume ...
Shingu Yasushige - - 2012
Background: Total stroke work (TSW) is used for the estimation of cardiac efficiency in mitral regurgitation (MR). We should be cautious about the interpretation of this parameter, especially when it is assessed by non-invasive methods such as echocardiography. Methods and Results: For the calculation of regurgitant stroke work, regurgitant volume ...
Parker Kim H - - 2012
This study is based on the hypothesis that the pressure within the arterial network can be usefully decomposed as the sum of a reservoir pressure and an excess pressure. The reservoir pressure waveform is defined to be the same in each vessel but delayed by the wave travel time from ...
Kelly A - - 2012
Reduced cardiac contractility has been associated with disrupted myocardial Ca(2+) signalling. The 1,4 benzothiazepine K201 (JTV-519) acts on several Ca(2+) handling proteins and improves cardiac contractility in vivo in a variety of animal models of myocardial dysfunction. However, it is unclear whether this improvement depends on the systemic effects of ...
Zamir M - - 2012
In a premature ventricular contraction (PVC), a systolic blood pressure peak is missing during the affected cardiac cycle, leading to a prolonged reduction in blood pressure which is then followed by a large burst of sympathetic outflow. In a normal ventricular contraction, it is generally believed that peak carotid and ...
Sawatsky Andrew - - 2012
BACKGROUND: Patellofemoral joint pain is a common knee disorder, but its underlying causes remain unknown. One proposed mechanism is an imbalance in force in the knee extensor muscles. Specifically, the vastus medialis and vastus lateralis are thought to play a crucial role in proper patellar tracking, and weakness in vastus ...
Zeqiri Nexhmi - - 2012
Biochemical and physiological mechanisms by which lead affects the cardiovascular system by increasing blood pressure are still unknown. But it is believed that the increased arterial pressure disturbance is caused as a result of the concentration of intracellular calcium ions (Ca). The study had the purposes of analyzing the effect ...
Reems Miryam M - - 2012
Central venous pressure (CVP), an estimate of right atrial pressure, has been used to assess cardiac preload and volume status in critically ill patients, assist in the diagnosis of right-sided heart failure, and guide fluid resuscitation. It is determined by the interaction between cardiac function and venous return. CVP measurements ...
Frohlich Edward D - - 2012
This review discusses cardiac consequences of pressure overload. In response to elevated pressure, the ventricular hypertrophy compensates for the increased wall stress. However, the ventricular hypertrophy involves numerous structural adaptations that may lead to ventricular dysfunction and, eventually, heart failure. Particular emphasis is placed on molecular mechanisms that govern the ...
Lee Wai - - 2012
A 9-year-old girl had hypertension (systolic blood pressure of 125 mm Hg) noted at an annual well child visit. An ultrasound study demonstrated a large right renal cystic mass. A partial nephrectomy was performed. The surgical specimen was 9.7 × 9.4 × 6.4 cm and weighed 413.2 g. The tumor ...
Fujita Masashi - - 2012
In the two-cell stage embryos of Caenorhabditis elegans, the contact surface of the two blastomeres forms a curve that bulges from the AB blastomere to the P₁ blastomere. This curve is a consequence of the high intracellular hydrostatic pressure of AB compared with that of P₁. However, the higher pressure ...
Wölkart G - - 2012
Adipose triglyceride lipase (ATGL) has been identified as a rate-limiting enzyme of mammalian triglyceride catabolism. Deletion of the ATGL gene in mice results in severe lipid accumulation in a variety of tissues including the heart. In the present study we investigated cardiac function in ATGL-deficient mice and the potential therapeutic ...
Hannawi Bashar - - 2012
Chronic mesenteric ischemia is a rare disorder in the United States. Frequently, its symptoms correlate poorly with the angiographically apparent degree of mesenteric artery stenosis. Measuring the pressure gradient with a small-caliber catheter is an established means of determining whether a particular stenosis is flow-limiting, thus guiding the interventional decision ...
Rood Kara M KM Bridgeport Hospital, Yale New Haven Health System, Bridgeport, CT 06610, - - 2012
Insertion of intrauterine pressure catheters is a routine procedure performed in labor and delivery departments, with few associated complications. There are several reports of maternal and neonatal morbidity associated with the use of intrauterine pressure catheters and their rare adverse outcomes. We report an unusual case of uterine hypertonicity resulting ...
Jones James P JP Division of Nephrology, Department of Medicine, St. Luke's-Roosevelt Hospital Center, Columbia University College of Physicians and Surgeons, New York, NY 10025, USA. - - 2012
Although prior studies have shown that frequent hemodialysis (HD) can lead to improved control of dry weight in end-stage renal disease patients, there are no clinical studies examining whether this can improve blood pressure (BP) control and can also shorten the dialysis time needed to achieve satisfactory removal of small ...
Matthesen Solveig K - - 2011
Background. Potassium is the main intracellular cation, which contributes to keeping the intracellular membrane potential slightly negative and elicits contraction of smooth, skeletal and cardiac muscle. A change in potassium intake modifies both cardiovascular and renal tubular function. The purpose of the trial was to investigate the effect of dietary ...
Brugts J J - - 2011
Abstract  We present a case of acute respiratory insufficiency with right-to-left atrial shunting under normal intracardiac pressures discovered several days after aortic surgery for aortic dissection. We discuss the possible mechanisms and management of right-to-left atrial shunting through an atrial septum defect with normal intracardiac pressures following cardiac surgery. (J ...
Bishu Kalkidan - - 2011
In vitro studies suggest that phosphorylation of titin reduces myocyte/myofiber stiffness. Titin can be phosphorylated by cGMP-activated protein kinase. Intracellular cGMP production is stimulated by B-type natriuretic peptide (BNP) and degraded by phosphodiesterases, including phosphodiesterase-5A. We hypothesized that a phosphodiesterase-5A inhibitor (sildenafil) alone or in combination with BNP would increase ...
Guadagnoli Jutta A - - 2011
In hearts of higher invertebrates as well as vertebrates, the work performed by the ventricle is a function of both rate and contractility. Decapod crustaceans experience a hypoxia-induced bradycardia that is thought to result in an overall reduction in cardiac work; however, this hypothesis has not yet been tested and ...
Maruvada S - - 2011
Tissue-mimicking materials (TMMs) can provide a convenient, stable, and reproducible means for testing high intensity focused ultrasound (HIFU) devices. When TMMs containing thermal sensors are used to measure ultrasound-induced temperature rise, it is important that measurement results reasonably represent those that occur in biological tissue. Therefore the aim of this ...
Chan Gregory S H - - 2012
Assessment of spontaneous slow waves in the peripheral blood volume using the photoplethysmogram (PPG) has shown potential clinical value, but the physiological correlates of these fluctuations have not been fully elucidated. This study addressed the contribution of arterial pressure and muscle sympathetic nerve activity (MSNA) in beat-to-beat PPG variability in ...
Kwiatek Monika A - - 2012
This study aimed to apply novel high-resolution manometry with eight-sector radial pressure resolution (3D-HRM technology) to resolve the deglutitive pressure morphology at the esophagogastric junction (EGJ) before, during, and after bolus transit. A hybrid HRM assembly, including a 9-cm-long 3D-HRM array, was used to record EGJ pressure morphology in 15 ...
Choi Hyun-Min - - 2011
This study determined whether an elevated muscle metaboreflex contributes to the excessive blood pressure response to exercise in postmenopausal women. Thirty healthy female volunteers were studied (15 postmenopausal and 15 premenopausal). Stroke volume, heart rate, cardiac output (CO), systolic blood pressure, diastolic blood pressure, and total vascular conductance (TVC) were ...
Maybauer Marc O - - 2011
ABSTRACT: This experimental animal study investigates the effects of combined recombinant human activated protein C (rhAPC) and ceftazidime on cardio-pulmonary function in acute lung injury and severe sepsis. Twenty-one sheep (37±2 kg) were operatively prepared and randomly allocated to either the sham, control, or treatment group (n=7 each). Single treatments ...
Cheng Guangmao - - 2012
Formation of a dense microtubule network that impedes cardiac contraction and intracellular transport occurs in severe pressure overload hypertrophy. This process is highly dynamic, since microtubule depolymerization causes striking improvement in contractile function. A molecular etiology for this cytoskeletal alteration has been defined in terms of type 1 and type ...
Krediet C T Paul - - 2011
We assessed the timing of vagal and sympathetic factors that mediate hypotension during CSM (carotid sinus massage) in patients with carotid sinus hypersensitivity. We hypothesized that a fall in cardiac output would precede vasodepression, and that vasodepression would be exaggerated by head-up tilt. We performed pulse contour analyses on blood ...
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