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Cardiac output; haemodynamic;

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https://www.readbyqxmd.com/read/28125301/the-influence-of-rapid-growth-in-broilers-on-florfenicol-pharmacokinetics-allometric-modelling-of-the-pharmacokinetic-and-haemodynamic-parameters
#1
B Poźniak, P Pawłowski, U Pasławska, T Grabowski, A Suszko, M Lis, M Świtała
1. The aim of this study was to determine if the pharmacokinetics (PK) of florfenicol (FF) undergo age-dependent changes in broilers. Since drug elimination depends on cardiovascular functions, a haemodynamic study was performed in parallel. 2. Broilers of 0.68, 1.27, 2.45 and 5.13 kg were administered FF in a single intravenous dose of 30 mg/kg body weight. Plasma drug concentrations were determined using high-performance liquid chromatography and PK parameters were calculated using a non-compartmental model...
January 26, 2017: British Poultry Science
https://www.readbyqxmd.com/read/28103829/a-comparison-of-the-effects-of-oral-vs-intravenous-hydration-on-subclinical-acute-kidney-injury-in-living-kidney-donors-a-protocol-of-a-randomised-controlled-trial
#2
Shona Mackinnon, Emma Aitken, Ryan Ghita, Marc Clancy
BACKGROUND: Optimal treatment for established renal failure is living donor kidney transplantation. However this pathway exposes healthy individuals to significant reduction in nephron mass via major surgical procedure. Laparoscopic donor nephrectomy is now the most common method for live donor transplantation, reducing both donor post-operative pain and recovery time. However this procedure exposes kidneys to additional haemodynamic stresses. It has been suggested that donor hydration-particularly the use of preoperative intravenous fluids-may counteract these stresses, reducing subclinical acute kidney injury and ultimately improving long-term renal function...
January 19, 2017: BMC Nephrology
https://www.readbyqxmd.com/read/28070330/the-approximated-cardiovascular-reserve-index-complies-with-haemorrhage-related-hemodynamic-deterioration-pattern-a-swine-exsanguination-model
#3
Roy Nadler, Elon Glassberg, Itay E Gabbay, Linn Wagnert-Avraham, Gal Yaniv, David Kushnir, Arik Eisenkraft, Ben-Zion Bobrovsky, Uri Gabbay
BACKGROUND: To estimate the cardiovascular reserve we formulated the Cardiovascular Reserve Index (CVRI) based on physiological measurements. The aim of this study was to evaluate the pattern of CVRI in haemorrhage-related haemodynamic deterioration in an animal model simulating combat injury. METHODS: Data were collected retrospectively from a research database of swine exsanguination model in which serial physiological measurements were made under anesthesia in 12 swine of haemorrhagic injury and 5 controls...
February 2017: Annals of Medicine and Surgery
https://www.readbyqxmd.com/read/28025231/cardiac-resynchronization-therapy-by-multipoint-pacing-improves-response-of-left-ventricular-mechanics-and-fluid-dynamics-a-three-dimensional-and-particle-image-velocimetry-echo-study
#4
Mariachiara Siciliano, Federico Migliore, Luigi Badano, Emanuele Bertaglia, Gianni Pedrizzetti, Stefano Cavedon, Alessandro Zorzi, Domenico Corrado, Sabino Iliceto, Denisa Muraru
AIMS: To characterize the effect of multipoint pacing (MPP) compared to biventricular pacing (BiV) on left ventricle (LV) mechanics and intraventricular fluid dynamics by three-dimensional echocardiography (3DE) and echocardiographic particle imaging velocimetry (Echo-PIV). METHODS AND RESULTS: In 11 consecutive patients [8 men; median age 65 years (57-75)] receiving cardiac resynchronization therapy (CRT) with a quadripolar LV lead (Quartet,St.Jude Medical,Inc...
December 26, 2016: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/28017278/three-dimensional-transoesophageal-echocardiography-for-cardiac-output-in-critically-ill-patients-a-pilot-study-of-ultrasound-versus-the-thermodilution-method
#5
COMPARATIVE STUDY
Nadjib Hammoudi, Guillaume Hékimian, Florent Laveau, Marc Achkar, Richard Isnard, Alain Combes
BACKGROUND: Three-dimensional transoesophageal echocardiography (3D-TOE) is a new noninvasive tool for quantitative assessment of left ventricular (LV) volumes and ejection fraction. AIM: The objective of this pilot study was to evaluate the feasibility and accuracy of 3D-TOE for the estimation of cardiac output (CO), using transpulmonary thermodilution with the Pulse index Contour Continuous Cardiac Output (PiCCO) system as the reference method, in intensive care unit (ICU) patients...
January 2017: Archives of Cardiovascular Diseases
https://www.readbyqxmd.com/read/28002069/assessment-of-a-smartphone-app-capstesia-for-measuring-pulse-pressure-variation-agreement-between-two-methods-a-cross-sectional-study
#6
Borja Barrachina, Raquel Cobos, Noemi Mardones, Angel Castañeda, Cristina Vinuesa
BACKGROUND: Less invasive and noninvasive methods are emerging for haemodynamic monitoring. Among them is Capstesia, a smartphone app that, from photographs of a patient monitor showing invasive arterial pressure, estimates advanced haemodynamic variables after digitising and analysing the pressure curves. OBJECTIVE: The aim of this study was to compare the level of agreement between the analysis of the signals obtained from the patient monitor and a photograph of the same images using the Capstesia app...
February 2017: European Journal of Anaesthesiology
https://www.readbyqxmd.com/read/27979984/haemodynamic-response-to-muscle-reflex-is-abnormal-in-patients-with-heart-failure-with-preserved-ejection-fraction
#7
Silvana Roberto, Gabriele Mulliri, Raffaele Milia, Roberto Solinas, Virginia Pinna, Gianmarco Sainas, Massimo F Piepoli, Antonio Crisafulli
The aim of the present investigation was to assess the role of cardiac diastole on the hemodynamic response to metaboreflex activation. We wanted to determine whether patients with diastolic function impairment showed a different hemodynamic response as compared to normal subjects during this reflex. Hemodynamics during the metaboreflex activation obtained by post-exercise muscle ischemia (PEMI) was assessed in 10 patients with diagnosed heart failure with preserved ejection fraction (HFpEF) and in 12 age-matched healthy controls (CTL)...
December 15, 2016: Journal of Applied Physiology
https://www.readbyqxmd.com/read/27931651/effects-of-vasodilators-on-haemodynamic-coherence
#8
REVIEW
Christian Fuchs, Christian Ertmer, Sebastian Rehberg
Vasodilators are a potential therapeutic option for patients with persisting microcirculatory disorders despite adequate cardiac output and mean arterial pressure due to conventional haemodynamic stabilization. Venous vasodilation may decrease post-capillary venular pressure and thus increase capillary flow resulting in reduced extravasation and oedema formation. Arteriolar vasodilation may increase microvascular flow by 'opening' the microcirculation. In particular, inodilators that combine vasodilation with positive inotropy may be promising...
December 2016: Best Practice & Research. Clinical Anaesthesiology
https://www.readbyqxmd.com/read/27931645/haemodynamic-coherence%C3%A2-%C3%A2-the-relevance-of-fluid-therapy
#9
REVIEW
Philip Arnemann, Laura Seidel, Christian Ertmer
The ultimate goal of fluid therapy is to improve the oxygenation of cells by improving the cardiac output, thus improving microcirculation by optimizing macrocirculation. This haemodynamic coherence is often altered in patients with haemorrhagic shock and sepsis. The loss of haemodynamic coherence is associated with adverse outcomes. It may be influenced by the mechanisms of the underlying disease and properties of different fluids used for resuscitation in these critically ill patients. Monitoring microcirculation and haemodynamic coherence may be an additional tool to predict the response to fluid administration...
December 2016: Best Practice & Research. Clinical Anaesthesiology
https://www.readbyqxmd.com/read/27931643/microvascular-monitoring-do-global-markers-help
#10
REVIEW
Jean-Louis Vincent, Fabio Silvio Taccone
The microcirculation is altered in sepsis, and the degree and persistence of these alterations are associated with outcome. When there are significant alterations of the systemic circulation, as in shock, the microcirculation is always altered. However, sometimes global variables can be restored to normal while the microcirculation remains altered. Monitoring the microcirculation has, therefore, been proposed as a more precise means of assessing the effects of therapy. In this review, we will discuss the limitations of global haemodynamic variables such as mean arterial pressure, cardiac output and mixed venous oxygen saturation as markers of microcirculatory abnormalities...
December 2016: Best Practice & Research. Clinical Anaesthesiology
https://www.readbyqxmd.com/read/27891584/an-observational-study-of-the-macro-and-micro-haemodynamic-implications-of-epidural-anaesthesia-in-children
#11
L Triffterer, P Marhofer, G Lechner, T C Marksz, O Kimberger, W Schmid, D Marhofer
The haemodynamic implications of epidural anaesthesia in children are poorly documented. We report macro- and micro-haemodynamic data from an observational study of 25 children ranging from neonates to six-years old, who underwent surgery conducted with a specific combination of monitoring systems. We analysed 90 min of study-related monitoring after epidural catheterisation, with skin incision taking place after around 30 min. We recorded macrohaemodynamic parameters (monitored using LiDCOrapid) including heart rate, mean arterial pressure, cardiac output, stroke volume, systemic vascular resistance and stroke volume variation...
November 28, 2016: Anaesthesia
https://www.readbyqxmd.com/read/27854379/longitudinal-maternal-haemodynamics-in-fetal-growth-restriction-in-pregnancies-at-high-risk-for-placental-insufficiency
#12
Daniel Stott, Papastefanou I, Daniela Paraschiv, Katherine Clark, Nikos A Kametas
OBJECTIVE: Fetal growth restriction is a powerful determinant of poor perinatal outcomes. Our previous work in pregnancies at high risk for the development of hypertension found that early in pregnancy maternal haemodynamics show impaired cardiovascular adaptation in gestations destined to deliver growth-restricted infants. In this study, we serially monitored maternal haemodynamics from the first through to the third trimester in a similar high-risk cohort, in order to determine if, in pregnancies complicated by growth-restriction, these distinct haemodynamic profiles found at presentation persisted throughout pregnancy...
October 31, 2016: Ultrasound in Obstetrics & Gynecology
https://www.readbyqxmd.com/read/27849677/use-of-a-short-acting-%C3%AE-1-blocker-during-endotoxemia-may-reduce-cerebral-tissue-oxygenation-if-haemodynamics-are-depressed-by-a-decrease-in-heart-rate
#13
Tadayoshi Kurita, Shingo Kawashima, Koji Morita, Yoshiki Nakajima
BACKGROUND: A decrease in heart rate (HR) using a short-acting β blocker has potential benefits in sepsis; however, depression of haemodynamics and reduction of cerebral oxygenation may also occur in endotoxemia. METHODS: Seventeen swine were allocated to landiolol or control groups. In the landiolol group, the dose was sequentially changed from 0 to 40 to 200 μg kg min, and stopped. Haemodynamics, blood variables and the cerebral tissue oxygenation index (TOI) were recorded by near infrared spectroscopy at each dose...
November 15, 2016: Shock
https://www.readbyqxmd.com/read/27843047/a-prospective-study-on-the-impact-of-heart-rate-control-achieved-with-metoprolol-on-cardiac-performance-motor-function-and-quality-of-life-in-chinese-chronic-heart-failure-patients
#14
Yong Meng, Xuelu Liu, Juan Liu, Xianliang Cheng
BACKGROUND: To prospectively evaluate the impact of metoprolol achieved heart rate (HR) on cardiac-motor function and quality of life (QoL) in chronic heart failure (CHF) patients. METHODS AND RESULTS: Between February 2013 to April 2016, association of HR reduction with haemodynamic indices, motor function and QoL in CHF patients with HR>80bpm receiving metoprolol 23.75mg or 47.5mgq.d was studied. Overall, 154 patients (median age, 66.39years; males, n=101; females, n=53) were enrolled, whose average resting HR decreased significantly from baseline value of 82...
January 15, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/27826705/feasibility-and-accuracy-of-cardiac-right-to-left-shunt-detection-in-children-by-new-transpulmonary-ultrasound-dilution-method
#15
Martin Boehne, Mathias Baustert, Verena Paetzel, Dietmar Boethig, Harald Köditz, Nils Dennhardt, Philipp Beerbaum, Harald Bertram
Transpulmonary ultrasound dilution (TPUD) method, a novel indicator dilution (ID) technique for cardiac output measurement, detects and quantifies shunts, both in children and adults. However, its accuracy and reproducibility in cardiac right-to-left-shunt (RLS) detection have not been investigated. In a prospective observational study, we assessed the validity of TPUD algorithm for RLS detection in children with congenital heart disease (CHD) and proven RLS in comparison with controls without shunts between February 2010 and October 2011...
January 2017: Pediatric Cardiology
https://www.readbyqxmd.com/read/27824602/exercise-pulmonary-haemodynamics-predict-outcome-in-patients-with-systemic-sclerosis
#16
Adriana Stamm, Stéphanie Saxer, Mona Lichtblau, Elisabeth D Hasler, Suzana Jordan, Lars C Huber, Konrad E Bloch, Oliver Distler, Silvia Ulrich
The aim of the present study was to investigate the prognostic value of exercise haemodynamics measured during right heart catheterisation (RHC) in patients with systemic sclerosis (SSc) referred for evaluation of pulmonary hypertension.SSc patients undergoing RHC at rest and during maximal supine incremental cycle exercise were grouped into resting precapillary pulmonary hypertension (PHrest) (mean pulmonary artery pressure (mPAP) ≥25 mmHg, pulmonary artery wedge pressure <15 mmHg), exercise-induced pulmonary hypertension (PHex) (mPAP ≥30 mmHg and mPAP/cardiac output >3 mmHg·L(-1)·min(-1) at maximal exercise), and without pulmonary hypertension (PHnone)...
December 2016: European Respiratory Journal: Official Journal of the European Society for Clinical Respiratory Physiology
https://www.readbyqxmd.com/read/27800645/serial-hemodynamic-monitoring-to-guide-treatment-of-maternal-hypertension-leads-to-reduction-in-severe-hypertension
#17
D Stott, I Papastefanou, D Paraschiv, K Clark, N A Kametas
OBJECTIVES: To examine whether treatment for hypertension in pregnancy that is guided by serial monitoring of maternal central hemodynamics leads to a reduction in the rate of severe hypertension, defined as blood pressure ≥ 160/110 mmHg; and to assess the distinct longitudinal hemodynamic profiles associated with beta-blocker monotherapy, vasodilator monotherapy and dual agent therapy, and their relationships with outcomes, including fetal growth restriction. METHODS: This was a prospective observational study at a dedicated antenatal hypertension clinic in a tertiary UK hospital...
January 2017: Ultrasound in Obstetrics & Gynecology
https://www.readbyqxmd.com/read/27777261/heart-rate-acceleration-with-glp-1-receptor-agonists-in-type-2-diabetes-patients-an-acute-and-12-week-randomised-double-blind-placebo-controlled-trial
#18
RANDOMIZED CONTROLLED TRIAL
Mark M Smits, Lennart Tonneijck, Marcel H A Muskiet, Trynke Hoekstra, Mark H H Kramer, Michaela Diamant, Daniël H van Raalte
OBJECTIVE: To examine mechanisms underlying resting heart rate (RHR) increments of GLP-1 receptor agonists in type 2 diabetes patients. DESIGN: Acute and 12-week randomised, placebo-controlled, double-blind, single-centre, parallel-group trial. METHODS: In total, 57 type 2 diabetes patients (mean ± s.d. age: 62.8 ± 6.9 years; BMI: 31.8 ± 4.1 kg/m(2); HbA1c: 7.3 ± 0.6%), treated with metformin and/or sulfonylureas, were included between July 2013 and August 2015...
January 2017: European Journal of Endocrinology
https://www.readbyqxmd.com/read/27762457/longitudinal-hemodynamics-in-acute-phase-of-treatment-with-labetalol-in-hypertensive-pregnant-women-to-predict-need-for-vasodilatory-therapy
#19
D Stott, M Bolten, D Paraschiv, I Papastefanou, J B Chambers, N A Kametas
OBJECTIVE: Hypertensive pregnant women who do not respond to treatment with labetalol to control blood pressure (BP), but require vasodilatory therapy, progress rapidly to severe hypertension. This could be delayed by early recognition and individualized treatment. In this study, we sought to create prediction models from data at presentation and at 1 h and 24 h after commencement of treatment to identify patients who will not have a sustained response to labetalol and therefore need vasodilatory therapy...
January 2017: Ultrasound in Obstetrics & Gynecology
https://www.readbyqxmd.com/read/27746615/non-invasive-diagnosis-of-oesophageal-varices-using-systemic-haemodynamic-measurements-by-finometry-comparison-with-other-non-invasive-predictive-scores
#20
Kara Rye, Gerri Mortimore, Andrew Austin, Jan Freeman
BACKGROUND/AIMS: Cirrhosis and portal hypertension are characterised by a hyperdynamic circulation, which is independently associated with variceal size. Non-invasive techniques for measurement of systemic haemodynamics are now available. The aim of the study was to prospectively assess the accuracy of systemic haemodynamics measured non-invasively for the detection of oesophageal varices in cirrhotic patients as compared to other currently available non-invasive methods. METHODS: In a study of 29 cirrhotic patients, systemic haemodynamics were studied non-invasively using the Finometer(®) (mean arterial pressure (MAP), cardiac output (CO)/index, heart rate (HR), peripheral vascular resistance) and portal pressure was assessed by hepatic venous pressure gradient...
September 2016: Journal of Clinical and Experimental Hepatology
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