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Cardiac output; haemodynamic;

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https://www.readbyqxmd.com/read/28424627/blood-pressure-increase-during-oxygen-supplementation-in-chronic-kidney-disease-patients-is-mediated-by-vasoconstriction-independent-of-baroreflex-function
#1
René van der Bel, Müşerref Çalişkan, Robert A van Hulst, Johannes J van Lieshout, Erik S G Stroes, C T Paul Krediet
Renal hypoxia is thought to be an important pathophysiological factor in the progression of chronic kidney disease (CKD) and the associated hypertension. In a previous study among CKD patients, supplementation with 100% oxygen reduced sympathetic nerve activity (SNA) and lowered blood pressure (BP). We aimed to assess the underlying haemodynamic modulation and hypothesized a decreased systemic vascular resistance (SVR). To that end, 19 CKD patients were studied during 15-min intervals of increasing partial oxygen pressure (ppO2) from room air (0...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28419552/feasibility-and-utility-of-portable-ultrasound-during-retrieval-of-sick-preterm-infants
#2
Kathryn Browning Carmo, Tracey Lutz, Mark Greenhalgh, Andrew Berry, Martin Kluckow, Nick Evans
AIM: Document the incidence of haemodynamic pathology in critically ill preterm newborns requiring transport. METHOD: A transport neonatologist performed cardiac and cerebral ultrasound before and after transportation of infants born ≤ 30 weeks gestation. RESULTS: 44 newborns were studied 2008 - 2015, 21 transported by road, 19 by helicopter and 4 by fixed wing. Median birth weight 1130g (680-1960g), median gestation 27 weeks (23-30) and 30/44 were male...
April 17, 2017: Acta Paediatrica
https://www.readbyqxmd.com/read/28407148/effects-of-closed-loop-stimulation-vs-ddd-pacing-on-haemodynamic-variations-and-occurrence-of-syncope-induced-by-head-up-tilt-test-in-older-patients-with-refrac-tory-cardioinhibitory-vasovagal-syncope-the-tilt-test-induced-response-in-closed-loop-stimulation
#3
Pietro Palmisano, Gabriele Dell'Era, Vincenzo Russo, Maria Zaccaria, Rolando Mangia, Miriam Bortnik, Federica De Vecchi, Ailia Giubertoni, Fabiana Patti, Andrea Magnani, Gerardo Nigro, Anna Rago, Eraldo Occhetta, Michele Accogli
Aims: Closed-loop stimulation (CLS) seemed promising in preventing the recurrence of vasovagal syncope (VVS) in patients with a cardioinhibitory response to head-up tilt test (HUTT) compared with conventional pacing. We hypothesized that the better results of this algorithm are due to its quick reaction in high-rate pacing delivered in the early phase of vasovagal reflex, which increase the cardiac output and the blood pressure preventing loss of consciousness. Methods and results: This prospective, randomized, single-blind, multicentre study was designed as an intra-patient comparison and enrolled 30 patients (age 62...
April 12, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/28404439/haemodynamic-changes-during-labour-continuous-minimally-invasive-monitoring-in-20-healthy-parturients
#4
J C Kuhn, R Sørum Falk, E Langesæter
BACKGROUND: There are few studies on maternal haemodynamic changes during labour. None have used continuous cardiac output monitoring during all labour stages. In this observational study, we monitored haemodynamic variables continuously during the entire course of labour in healthy parturients. METHODS: Continuous haemodynamic monitoring with the LiDCOplus technique was performed in 20 healthy parturients during spontaneous labour, vaginal delivery and for 15minutes postpartum...
March 10, 2017: International Journal of Obstetric Anesthesia
https://www.readbyqxmd.com/read/28402021/validation-of-non-invasive-haemodynamic-methods-in-patients-with-liver-disease-the-finometer-and-the-task-force-monitor
#5
Jane M Brittain, Troels M Busk, Søren Møller
Patients with advanced cirrhosis often present a hyperdynamic circulation characterized by a decrease in systolic and diastolic blood pressure (SBP and DBP), and an increase in heart rate (HR) and cardiac output (CO). Accurate assessment of the altered circulation can be performed invasively; however, due to the disadvantages of this approach, non-invasive methods are warranted. The purpose of this study was to compare continuous non-invasive measurements of haemodynamic variables by the Finometer and the Task Force Monitor with simultaneous invasive measurements...
April 12, 2017: Clinical Physiology and Functional Imaging
https://www.readbyqxmd.com/read/28376950/impact-of-the-location-of-the-fenestration-on-fontan-circulation-haemodynamics-a-three-dimensional-computational-model-study
#6
Koichi Sughimoto, Yuta Asakura, Christian P Brizard, Fuyou Liang, Takashi Fujiwara, Kagami Miyaji, Hao Liu
OBJECTIVES: There is no consensus or theoretical explanation regarding the optimal location for the fenestration during the Fontan operation. We investigated the impact of the location of the fenestration on Fontan haemodynamics using a three-dimensional Fontan model in various physiological conditions. METHODS: A three-dimensional Fontan model was constructed on the basis of CT images, and a 4-mm-diameter fenestration was located between the extracardiac Fontan conduit and the right atrium at three positions: superior, middle, and inferior part of the conduit...
April 5, 2017: Cardiology in the Young
https://www.readbyqxmd.com/read/28371908/acute-right-ventricular-resynchronization-improves-haemodynamics-in-children-after-surgical-repair-of-tetralogy-of-fallot
#7
Pavel Vojtovic, Filip Kucera, Peter Kubuš, Roman Gebauer, Tomáš Matejka, Tomáš Tláskal, Miroslav Ložek, Jan Kovanda, Jan Janoušek
Aims: Right bundle branch block is associated with right ventricular (RV) electromechanical dyssynchrony, which may contribute to acute haemodynamic impairment after repair of tetralogy of Fallot (ToF). We sought to evaluate the effects of RV resynchronization on haemodynamics and tissue oxygenation during the first 24 h after surgery. Methods and results: Arterial pressures, cardiac output, and tissue oxygenation were measured in 28 consecutive patients (median age 10...
March 23, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/28333321/preconception-and-early-pregnancy-maternal-haemodynamic-changes-in-healthy-women-in-relation-to-pregnancy-viability
#8
F L Foo, A Collins, C M McEniery, P R Bennett, I B Wilkinson, C C Lees
STUDY QUESTION: Are there differences in preconception cardiovascular function between women who have a viable pregnancy and those who have a first trimester miscarriage? SUMMARY ANSWER: Preconception cardiovascular function of central haemodynamics and arterial function are similar between women who have a viable pregnancy and those who have a first trimester miscarriage. WHAT IS KNOWN ALREADY: Miscarriages have been associated with increased long-term cardiovascular disease risk, and arterial and cardiovascular dysfunction has been hypothesised as the common link...
May 1, 2017: Human Reproduction
https://www.readbyqxmd.com/read/28329138/small-intestinal-submucosa-tricuspid-valve-tube-graft-shows-growth-potential-remodelling-and-physiological-valve-function-in-a-porcine-model%C3%A2
#9
Diana M Ropcke, Christine Ilkjaer, Marcell J Tjornild, Soren N Skov, Steffen Ringgaard, Vibeke E Hjortdal, Sten L Nielsen
OBJECTIVES: Tricuspid valve reconstruction using small intestinal submucosal extracellular matrix (ECM) designed as a tube graft is possible in severe valve pathology. Using cardiac magnetic resonance imaging (MRI) and digital photograph imaging, valves were evaluated after 6 months in a porcine model. METHODS: Ten 60 kg pigs received a tricuspid valve tube graft. A baseline MRI was performed after 2 weeks ( n  = 8). A follow-up MRI was performed in three of five 6 months' survivors to assess function and haemodynamics of the tricuspid tube graft...
February 27, 2017: Interactive Cardiovascular and Thoracic Surgery
https://www.readbyqxmd.com/read/28320068/thoracic-electrical-bioimpedance-versus-suprasternal-doppler-in-emergency-care
#10
Mohammed H Elwan, Jeremy Hue, Samira J Green, Salah M Eltahan, Mark R Sims, Timothy J Coats
OBJECTIVE: There are a number of cardiac output (CO) monitors that could potentially be used in the ED. Two of the most promising methods, thoracic electrical bioimpedance and suprasternal Doppler, have not been directly compared. The aim of this study was to investigate the feasibility of CO monitoring using suprasternal Doppler and bioimpedance in emergency care and compare haemodynamic data obtained from both monitors. METHODS: Haemodynamic measurements were made on the same group of patients using bioimpedance (Niccomo, Medis, Germany) and suprasternal Doppler (USCOM, Sydney, Australia)...
March 20, 2017: Emergency Medicine Australasia: EMA
https://www.readbyqxmd.com/read/28303789/flatness-based-control-approach-to-drug-infusion-for-cardiac-function-regulation
#11
Gerasimos Rigatos, Nikolaos Zervos, Alexey Melkikh
A new control method based on differential flatness theory is developed in this study, aiming at solving the problem of regulation of haemodynamic parameters. Actually control of the cardiac output (volume of blood pumped out by heart per unit of time) and of the arterial blood pressure is achieved through the administered infusion of cardiovascular drugs such as dopamine and sodium nitroprusside. Time delays between the control inputs and the system's outputs are taken into account. Using the principle of dynamic extension, which means that by considering certain control inputs and their derivatives as additional state variables, a state-space description for the heart's function is obtained...
February 2017: IET Systems Biology
https://www.readbyqxmd.com/read/28295749/nitric-oxide-no-donors-and-haemodynamic-changes-in-fetal-growth-restriction
#12
G M Tiralongo, I Pisani, B Vasapollo, A Khalil, B Thilaganathan, H Valensise
OBJECTIVE: To evaluate maternal cardiovascular effects of nitric oxide (NO) donors in pregnancies complicated by fetal growth restriction (FGR) METHODS: 26 women with a diagnosis of FGR were treated with transdermal patches of NO donors and plasma volume expansion. We compared the treated group to a control historical FGR untreated group of patients evaluated longitudinally. We obtained haemodynamic indices using UltraSonic Cardiac Output Monitor system. RESULTS: At enrolment, the two groups were similar in terms of maternal and haemodynamic characteristics...
March 10, 2017: Ultrasound in Obstetrics & Gynecology
https://www.readbyqxmd.com/read/28291665/cardiac-arrest-in-acute-myocardial-infarction-concept-of-circulatory-support-with-mechanical-chest-compression-and-impella-to-facilitate-percutaneous-coronary-intervention
#13
Kaleab N Asrress, Maciej Marciniak, Natalia Briceno, Divaka Perera
Cardiogenic shock in the context of acute ST-elevation myocardial infarction (STEMI) remains a challenge to manage and results in significant mortality and morbidity, cardiac arrest in this setting even more so. The increase in myocardial oxygen demand and consumption with the use of inotropes is recognised as increasing mortality. Alternatives include the intra-aortic balloon pump (IABP), which has yet to be shown to improve outcomes, and extracorporeal membrane oxygenation (ECMO), which requires super-specialised techniques not widely available...
February 28, 2017: Heart, Lung & Circulation
https://www.readbyqxmd.com/read/28256104/haemodynamic-influences-of-bisoprolol-in-hypertensive-middle-aged%C3%A2-men-a%C3%A2-double-blind-randomized-placebo-controlled-cross-over-study
#14
Lauri Suojanen, Antti Haring, Antti Tikkakoski, Jenni K Koskela, Anna M Tahvanainen, Heini Huhtala, Mika Kähönen, Kalle Sipilä, Arttu Eräranta, Jukka T Mustonen, Kari Kivistö, Ilkka H Pörsti
Treatment with beta-blockers appears to show inferior reduction of central versus peripheral blood pressure. We aimed to examine simultaneous changes in central and peripheral blood pressure, vascular resistance, cardiac function and arterial stiffness during beta-blockade. Haemodynamics were investigated after 3 weeks of bisoprolol treatment (5 mg/d) in a double-blind, randomized, placebo-controlled cross-over trial in never-treated 16 Caucasian males with grade I-II primary hypertension using continuous tonometric pulse wave analysis and whole-body impedance cardiography...
March 2, 2017: Basic & Clinical Pharmacology & Toxicology
https://www.readbyqxmd.com/read/28255448/effects-of-different-early-rehabilitation-techniques-on-haemodynamic-and-metabolic-parameters-in-sedated-patients-protocol-for-a-randomised-single-bind-cross-over-trial
#15
Clément Medrinal, Yann Combret, Guillaume Prieur, Aurora Robledo Quesada, Tristan Bonnevie, Francis Edouard Gravier, Éric Frenoy, Olivier Contal, Bouchra Lamia
INTRODUCTION: Early rehabilitation has become widespread practice for patients in intensive care; however, the prevalence of intensive care unit-acquired weakness remains high and the majority of physiotherapy is carried out in bed. Several inbed rehabilitation methods exist, but we hypothesise that techniques that provoke muscle contractions are more effective than passive techniques. METHODS: A randomised, controlled cross-over study will be carried out to evaluate and compare the effectiveness of early rehabilitation techniques on cardiac output (CO) in sedated patients in intensive care...
2017: BMJ Open Respiratory Research
https://www.readbyqxmd.com/read/28236342/maternal-cardiac-output-in-early-labour-a-possible-link-with-obstetrics-risks
#16
Herbert Valensise, Grazia Maria Tiralongo, Ilaria Pisani, Daniele Farsetti, Damiano Lo Presti, Giulia Gagliardi, Ripalta Marica Basile, Gian Paolo Novelli, Barbara Vasapollo
OBJECTIVE: to verify if the hemodynamic assessment of "low risk" pregnant women at term can improve the identification of patients with a maternal or foetal-neonatal complication during labour MATERIALS AND METHODS: a prospective observational study was conducted on 77 pregnant women at term with diagnosis of initial labour. We obtained haemodynamic indices using the USCOM(®) system. Patients were followed until the end of labour to check for foetal-neonatal and maternal outcomes. RESULTS: Eleven patients (14...
February 25, 2017: Ultrasound in Obstetrics & Gynecology
https://www.readbyqxmd.com/read/28125301/the-influence-of-rapid-growth-in-broilers-on-florfenicol-pharmacokinetics-allometric-modelling-of-the-pharmacokinetic-and-haemodynamic-parameters
#17
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...
April 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
#18
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
#19
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
#20
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
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