keyword
MENU ▼
Read by QxMD icon Read
search

mean systemic filling pressure

keyword
https://www.readbyqxmd.com/read/28629628/left-ventricular-outflow-tract-obstruction-and-its-impact-on-systolic-ventricular-function-and-exercise-capacity-in-adults-with-a-subaortic-right-ventricle
#1
Annina Stauber, Céline Wey, Matthias Greutmann, Daniel Tobler, Kerstin Wustmann, Andreas Wahl, Emanuela R Valsangiacomo Buechel, Matthias Wilhelm, Markus Schwerzmann
BACKGROUND: In biventricular hearts the filling and contractility of one ventricle affects the performance of the other. In this study, we compared right ventricular systolic function and exercise capacity in patients with a subaortic right ventricle (RV) in relation to the presence of a left ventricular outflow tract obstruction (LVOTO). METHODS: Retrospective chart review of adults with congenitally corrected transposition of the great arteries (ccTGA) or with a previous atrial switch procedure for complete TGA (D-TGA)...
June 15, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28611883/altitude-related-change-in-endotracheal-tube-cuff-pressures-in-helicopter-ems
#2
Stacy N Weisberg, Jonathan C McCall, Joseph Tennyson
INTRODUCTION: Over-inflation of endotracheal tube (ETT) cuffs has the potential to lead to scarring and stenosis of the trachea.1, 2,3, 4 The air inside an ETT cuff is subject to expansion as atmospheric pressure decreases, as happens with an increase in altitude. Emergency medical services helicopters are not pressurized, thereby providing a good environment for studying the effects of altitude changes ETT cuff pressures. This study aims to explore the relationship between altitude and ETT cuff pressures in a helicopter air-medical transport program...
June 2017: Western Journal of Emergency Medicine
https://www.readbyqxmd.com/read/28550170/right-atrial-pressure-and-venous-return-during-cardiopulmonary-bypass
#3
Per Werner Moller, Berhard Winkler, Samuel Hurni, Paul Philipp Heinisch, Andreas Martin Bloch, Soren Sondergaard, Stephan M Matthias Jakob, Jukka Takala, David Christian Berger
The relevance of right atrial pressure (RAP) as the back-pressure for venous return (QVR) and mean systemic filling pressure (MSFP) as up-stream pressure is controversial during dynamic changes of circulation. To examine the immediate response of QVR (sum of caval vein flows) to changes in RAP and pump function we used a closed chest, central cannulation, heart bypass porcine preparation (n=10) with veno-arterial extracorporeal membrane oxygenation (ECMO). MSFP was determined by clamping ECMO tubing with open or closed arterio-venous shunt at Euvolemia, Volume Expansion (9...
May 26, 2017: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/28479464/embo-evar-a-technique-to-prevent-type-ii-endoleak-a-single-centre-experience
#4
Massimiliano Natrella, Federico Navarretta, Alessandro Rapellino, Gianluca Job, Massimo Cristoferi, Matteo Castagnola, Gianmarco Lunardi, Luca Duc, Gianluca Fanelli, Andrea Peruzzo Cornetto, Teodoro Meloni, Flavio Peinetti
OBJECTIVES: To evaluate the role of intraprocedural aneurysm sac embolisation (embo-EVAR) during endovascular abdominal aneurysm repair (EVAR) using coils and fibrin glue for preventing type II endoleak (EII). MATERIALS AND METHODS: A retrospective clinical case analysis of 72 patients who underwent EVAR during the period 2011-2014. Two groups were compared at 6 and 12 months follow-up with MDCT scan and Contrast-enhanced ultrasound (CEUS) imaging: consecutively, 36 patients (group A) treated with classic EVAR and 36 patients (group B) treated with embo-EVAR...
May 4, 2017: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/28393776/serial-semi-invasive-hemodynamic-assessment-following-pericardiectomy-for-chronic-constrictive-pericarditis
#5
Ujjwal Kumar Chowdhury, Poonam Malhotra Kapoor, Adil Rizvi, Vishwas Malik, Sandeep Seth, Rajiv Narang, Mani Kalaivani, Sarvesh Pal Singh, Sathiya Selvam
OBJECTIVES: This study was designed to prospectively investigate the effects of pericardiectomy via median sternotomy on intra- and postoperative hemodynamics by a new semi-invasive device (Flotrac/VigileoTM monitor) using arterial pressure waveform analysis. PATIENTS AND METHODS: Thirty consecutive patients aged 15 to 55 years (mean+SD, 31.73 + 13.53 years), who had undergone total pericardiectomy via median sternotomy underwent serial hemodynamic evaluation. FlotracTM Sensor - derived stroke volume, stroke volume variation, systemic vascular resistance index (SVRI), cardiac index and right atrial pressure were measured just before and after pericardiectomy, at 12 hours, 24 hours, 48 hours, 72 hours and at discharge postoperatively...
April 2017: Annals of Cardiac Anaesthesia
https://www.readbyqxmd.com/read/28390451/a-comparative-volumetric-evaluation-of-four-obturating-techniques-in-primary-teeth-using-cone-beam-computed-tomography
#6
Aparna Singh, Nidhi Gupta, Nidhi Agarwal, Dipanshu Kumar, Ashish Anand
PURPOSE: To compare the volume of root canals of primary teeth filled by four different obturating techniques: (1) lentulospiral (LS); (2) insulin syringe (IS); (3) endodontic pressure syringe (EPS); and (4) the NaviTip system (NS) using cone beam computed tomography (CBCT). METHODS: 76 root canals of primary posterior teeth were selected and divided into four groups, according to the obturation technique. Biomechanical preparation of each root canal was completed with a number 30 K-file, and the volumes of the canals were then measured using CBCT...
March 15, 2017: Pediatric Dentistry
https://www.readbyqxmd.com/read/28360123/impact-of-positive-pressure-ventilation-on-mean-systemic-filling-pressure-in-critically-ill-patients-after-death
#7
Xavier Repessé, Cyril Charron, Guillaume Geri, Alix Aubry, Alexis Paternot, Julien Maizel, Michel Slama, Antoine Vieillard-Baron
Introduction Mean systemic filling pressure (Pms) defines the pressure measured in the venous-arterial system when the cardiac output is nil. Its estimation has been proposed in patients with beating hearts by building the venous return curve, using different pairs of right atrial pressure/cardiac output during mechanical ventilation. We raised the hypothesis according to which the Pms is altered by tidal ventilation and PEEP, which would challenge this extrapolation method based on cardiopulmonary interactions...
March 30, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28353026/effect-of-milrinone-infusion-on-pulmonary-vasculature-and-stroke-work-indices-a-single-center-retrospective-analysis-in-69-patients-awaiting-cardiac-transplantation
#8
Dmitry Abramov, Nicholas A Haglund, Thomas G Di Salvo
BACKGROUND: Although milrinone infusion is reported to benefit left ventricular function in chronic left heart failure, few insights exist regarding its effects on pulmonary circulation and right ventricular function. METHODS: We retrospectively reviewed right heart catheterization data at baseline and during continuous infusion of milrinone in 69 patients with advanced heart failure and analyzed the effects on ventricular stroke work indices, pulmonary vascular resistance and pulmonary arterial compliance...
March 28, 2017: American Journal of Cardiovascular Drugs: Drugs, Devices, and Other Interventions
https://www.readbyqxmd.com/read/28291960/trabeculectomy-with-ologen-versus-mitomycin-c-in-juvenile-open-angle-glaucoma-a-1-year-study
#9
RANDOMIZED CONTROLLED TRIAL
Fathi El-Sayyad, Heba Magdy Ahmed El-Saied, Mohamad Amr Salah Eddin Abdelhakim
BACKGROUND: We assessed bleb morphology and the intraocular pressure (IOP)-lowering effect of trabeculectomy with ologen compared to mitomycin C (MMC) in juvenile open-angle glaucoma (JOAG). METHODS: This is a prospective interventional comparative study conducted on 40 eyes (20 patients) with medically uncontrolled JOAG, randomly operating one eye for trabeculectomy with ologen (group A: 20 eyes) and the other with MMC (group B: 20 eyes). IOP measurement, SITA standard perimetry, and spectral domain optical coherence tomography (OCT) for retinal nerve fiber layer (RNFL) thickness were all done pre- and postoperatively...
2017: Ophthalmic Research
https://www.readbyqxmd.com/read/28240344/a-novel-model-based-control-strategy-for-aerobic-filamentous-fungal-fed-batch-fermentation-processes
#10
Lisa Mears, Stuart M Stocks, Mads O Albaek, Benny Cassells, Gürkan Sin, Krist V Gernaey
A novel model-based control strategy has been developed for filamentous fungal fed-batch fermentation processes. The system of interest is a pilot scale (550 L) filamentous fungus process operating at Novozymes A/S. In such processes, it is desirable to maximize the total product achieved in a batch in a defined process time. In order to achieve this goal, it is important to maximize both the product concentration, and also the total final mass in the fed-batch system. To this end, we describe the development of a control strategy which aims to achieve maximum tank fill, while avoiding oxygen limited conditions...
July 2017: Biotechnology and Bioengineering
https://www.readbyqxmd.com/read/28210935/the-effect-of-fluid-resuscitation-on-the-effective-circulating-volume-in-patients-undergoing-liver-surgery-a-post-hoc-analysis-of-a-randomized-controlled-trial
#11
Jaap Jan Vos, A F Kalmar, H G D Hendriks, J Bakker, T W L Scheeren
To assess the significance of an analogue of the mean systemic filling pressure (Pmsa) and its derived variables, in providing a physiology based discrimination between responders and non-responders to fluid resuscitation during liver surgery. A post-hoc analysis of data from 30 patients undergoing major hepatic surgery was performed. Patients received 15 ml kg(-1) fluid in 30 min. Fluid responsiveness (FR) was defined as an increase of 20% or greater in cardiac index, measured by FloTrac-Vigileo(®). Dynamic preload variables (pulse pressure variation and stroke volume variation: PPV, SVV) were recorded additionally...
February 16, 2017: Journal of Clinical Monitoring and Computing
https://www.readbyqxmd.com/read/28179257/interplay-between-renal-endothelin-and-purinergic-signaling-systems
#12
Eman Y Gohar, Malgorzata Kasztan, David M Pollock
Alterations in extracellular fluid volume regulation and sodium balance may result in the development and maintenance of salt-dependent hypertension, a major risk factor for cardiovascular disease. Numerous pathways contribute to the regulation of sodium excretion and blood pressure, including endothelin and purinergic signaling. Increasing evidence suggests a link between purinergic receptor activation and endothelin production within the renal collecting duct as a means of promoting natriuresis. A better understanding of the relationship between these two systems, especially in regard to sodium homeostasis, will fill a significant knowledge gap and may provide novel antihypertensive treatment options...
February 8, 2017: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/28043677/pressure-volume-loop-derived-cardiac-indices-during-dobutamine-stress-a-step-towards-understanding-limitations-in-cardiac-output-in-children-with-hypoplastic-left-heart-syndrome
#13
James Wong, Kuberan Pushparajah, Adelaide de Vecchi, Bram Ruijsink, Gerald F Greil, Tarique Hussain, Reza Razavi
BACKGROUND: Children with a single systemic right ventricle, such as in hypoplastic left heart syndrome (HLHS), frequently experience reduced exercise capacity. Elucidating the causes could help with optimising treatment strategies. METHODS: Prospective data from 10 consecutive symptomatic patients with HLHS undergoing clinical cardiac magnetic resonance with catheterisation (XMR) were analysed. Mean age 8.6years (range 3.5-11.6years), mean time since Fontan completion 5...
March 1, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28024557/acute-right-ventricle-failure-in-the-intensive-care-unit-assessment-and-management
#14
REVIEW
Carmen Hrymak, Johann Strumpher, Eric Jacobsohn
Caring for the critically ill patient with acute right ventricle (RV) failure is a diagnostic and management challenge. A thorough understanding of normal RV anatomy and physiology is essential to manage RV failure. Despite the fact that the RV is essentially a volume chamber that ejects into a low-pressure system, the left ventricle contributes significantly to RV function through maintenance of the transseptal gradient (TSG). Preserving systemic mean arterial pressure maintains the TSG and RV perfusion. Various pathological states cause acute RV failure by decreasing the TSG and RV perfusion and/or increasing pulmonary vascular resistance...
January 2017: Canadian Journal of Cardiology
https://www.readbyqxmd.com/read/27989060/acute-invasive-hemodynamic-effects-of-transcatheter-aortic-valve-replacement
#15
Michael Chrissoheris, Antonis Ziakas, Antonis Chalapas, Stavros Chadjimiltiades, Ioannis Styliades, Charalambos Karvounis, Ioulia Nikolaou, Konstantinos Spargias
BACKGROUND: Aortic stenosis imposes a chronic pressure overload on the left ventricle, with attendant adaptations in hemodynamics, muscle mass and performance. The hemodynamic changes that occur during the initial 24 h following abrupt removal of the impediment to left ventricular outflow have not been previously examined. METHODS: A total of 52 patients with right heart catheterization was evaluated before, within 6 h and at 24 h after successful transcatheter aortic valve replacement (TAVR)...
March 2016: Journal of Heart Valve Disease
https://www.readbyqxmd.com/read/27979984/haemodynamic-response-to-muscle-reflex-is-abnormal-in-patients-with-heart-failure-with-preserved-ejection-fraction
#16
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/27923944/membrane-oxygenator-use-with-biventricular-assist-device-facilitation-of-support-and-lung-recovery
#17
Kristen Nelson-McMillan, William J Ravekes, William R Thompson, Kristen M Brown, Larry Wolff, Rajeev S Wadia, LeAnn M McNamara, Donald H Shaffner, Ivor D Berkowitz, Marshall L Jacobs, Luca A Vricella
We present the use of a low-resistance membrane oxygenator (Quadrox D, Maquet) in series with a pulsatile right ventricular assist device (Berlin Heart EXCOR, Berlin Heart) in a patient with biventricular support who required high-frequency oscillatory ventilation (HFOV), due to refractory acute respiratory distress syndrome associated with Cytomegalovirus pneumonia. The high mean airway pressure associated with the use of HFOV resulted in a significant negative impact on left ventricular assist device (LVAD) filling that led to a combined respiratory and metabolic acidosis and the need for vasopressor support...
December 6, 2016: World Journal for Pediatric & Congenital Heart Surgery
https://www.readbyqxmd.com/read/27890833/pulse-wave-analysis-after-treatment-of-abdominal-aortic-aneurysms-with-the-ovation-device
#18
Efstratios Georgakarakos, Christos Argyriou, George S Georgiadis, Miltos K Lazarides
BACKGROUND: Ovation aortic stent-graft system is a new device for the endovascular treatment of Abdominal Aortic Aneurysms achieving fixation via a 35-mm long, rigid anchored suprarenal stent and sealing stent at the infrarenal level by a means of a polymer-filling pair of inflatable O-rings, which cause narrowing of flow lumen and regional stenosis. Thus, concerns have been raised regarding hemodynamic consequences associated with this new design. Our preliminary report showed no significant increase of aortic pulse wave velocity (aPWV) immediately after implantation of the ovation in 3 patients...
April 2017: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/27783382/short-term-effects-of-neuromuscular-blockade-on-global-and-regional-lung-mechanics-oxygenation-and-ventilation-in-pediatric-acute-hypoxemic-respiratory-failure
#19
Marlon E F Wilsterman, Pauline de Jager, Robert Blokpoel, Inez Frerichs, Sandra K Dijkstra, Marcel J I J Albers, Johannes G M Burgerhof, Dick G Markhorst, Martin C J Kneyber
BACKGROUND: Neuromuscular blockade (NMB) has been shown to improve outcome in acute respiratory distress syndrome (ARDS) in adults, challenging maintaining spontaneous breathing when there is severe lung injury. We tested in a prospective physiological study the hypothesis that continuous administration of NMB agents in mechanically ventilated children with severe acute hypoxemic respiratory failure (AHRF) improves the oxygenation index without a redistribution of tidal volume V T toward non-dependent lung zones...
December 2016: Annals of Intensive Care
https://www.readbyqxmd.com/read/27768204/in-vitro-performance-investigation-of-syncardia%C3%A2-freedom%C3%A2-driver-via-patient-simulator-mock-loop
#20
Riccardo Toninato, Silvia Scuri, Vincenzo Tarzia, Gino Gerosa, Francesca M Susin
PURPOSE: The gold standard therapy for patients with advanced heart failure is heart transplant. The gap between donors and patients in waiting lists promoted the development of circulatory support devices, such as the total artificial heart (TAH). Focusing on in vitro tests performed with CardioWest™ TAH (CW) driven by the SynCardia Freedom® portable driver (FD) the present study goals are: i) prove the reliability of a hydraulic circuit used as patient simulator to replicate a quasi-physiological scenario for various hydrodynamic conditions, ii) investigate the hydrodynamic performance of the CW FD, iii) help clinicians in possible interpretation of clinical cases outcomes...
November 29, 2016: International Journal of Artificial Organs
keyword
keyword
80836
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"