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Cardiac output; haemodynamic;

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https://www.readbyqxmd.com/read/29121915/clinical-monitoring-of-cardiac-output-assessed-by-transoesophageal-echocardiography-in-anaesthetised-dogs-a-comparison-with-the-thermodilution-technique
#1
Matheus M Mantovani, Denise T Fantoni, André M Gimenes, Jacqueline R de Castro, Patrícia B Flor, Keila K Ida, Denise S Schwartz
BACKGROUND: Cardiac output (CO) is an important haemodynamic parameter to monitor in patients during surgery. However, the majority of the techniques for measuring CO have a limited application in veterinary practice due to their invasive approach and associated complexity and risks. Transoesophageal echocardiography (TEE) is a technique used to monitor cardiac function in human patients during surgical procedures and allows CO to be measured non-invasively. This prospective clinical study aimed to compare the transoesophageal echocardiography using a transgastric view of the left ventricular outflow tract (LVOT) and the thermodilution (TD) technique for the assessment of CO during mean arterial pressure of 65-80 mmHg (normotension) and <65 mmHg (hypotension) in dogs undergoing elective surgery...
November 9, 2017: BMC Veterinary Research
https://www.readbyqxmd.com/read/29074483/transjugular-intrahepatic-portosystemic-shunt-impact-on-systemic-haemodynamics-and-renal-and-cardiac-function-in-patients-with-cirrhosis
#2
Troels Malte Busk, Flemming Bendtsen, Jørgen Hjelm Poulsen, Jens Otto Clemmesen, Fin Stolze Larsen, Jens Peter Goetze, Jens Schmidt Iversen, Magnus Thorsten Jensen, Rasmus Møgelvang, Erling Bjerregaard Pedersen, Jesper Noergaard Bech, Søren Møller
BACKGROUND AND AIMS: Transjugular intrahepatic portosystemic shunt (TIPS) alleviates portal hypertension and possibly increases central blood volume (CBV). Moreover, renal function often improves; however, its effects on cardiac function are unclear. The aims of our study were to examine the effects of TIPS on hemodynamics and renal and cardiac function in patients with cirrhosis. METHODS: In 25 cirrhotic patients, we analyzed systemic, cardiac, and splanchnic hemodynamics by catheterization of the liver veins and right heart chambers before and 1 week after TIPS...
October 26, 2017: American Journal of Physiology. Gastrointestinal and Liver Physiology
https://www.readbyqxmd.com/read/29062560/use-of-a-minimally-invasive-cardiac-output-monitor-to-optimise-haemodynamics-in-a-patient-with-mitral-valve-disease-undergoing-cerebrovascular-surgery
#3
Ali M Al-Mashani, Niranjan D Waje, Neeraj Salhotra, Samaresh Das, Neelam Suri, Rashid A Al-Sheheimi, Nilay Chatterjee
Patients with mitral valve disease undergoing cerebrovascular surgery face increased inherent risks due to their associated cardiac comorbidities. As such, the anaesthetic management of such patients is distinctly challenging. Simultaneous consideration of both the cerebrovascular and underlying cardiac conditions determines key anaesthetic issues, as fluids and vasopressors or inotropes need to be titrated according to haemodynamic variables in order to optimise cerebral blood flow without compromising cardiac function...
August 2017: Sultan Qaboos University Medical Journal
https://www.readbyqxmd.com/read/29049537/bilateral-bidirectional-glenn-outcome-of-off-pump-technique
#4
Ashraf A H El Midany, Ezzeldin A Mostafa, Sherif A Mansour, Mohammed Saffan, Mahmoud Zalat, Ismail N El-Sokkary, Ahmed M E Aletreby
OBJECTIVES: Off-pump bilateral bidirectional Glenn (b-BDG) poses a surgical challenge and may add complexity to the postoperative outcome especially regarding uniformity of the anastomosis and central pulmonary artery growth. Herein, we report early- and mid-term outcomes after off-pump b-BDG without using superior vena cava decompression techniques. METHODS: Ninety-seven consecutive patients, between 2009 and 2014, were included in this prospective study. All patients had complete pre- and postoperative clinical and detailed neurological assessments...
November 1, 2017: Interactive Cardiovascular and Thoracic Surgery
https://www.readbyqxmd.com/read/29045747/extracorporeal-membrane-oxygenation-support-for-right-ventricular-failure-after-left-ventricular-assist-device-implantation
#5
Julia Riebandt, Thomas Haberl, Dominik Wiedemann, R Moayedifar, Thomas Schloeglhofer, Stéphane Mahr, Kamen Dimitrov, Philipp Angleitner, Guenther Laufer, Daniel Zimpfer
OBJECTIVES: Right ventricular (RV) failure complicating left ventricular assist device implantation is associated with increased mortality. Despite a lack of supporting evidence, venoarterial extracorporeal membrane oxygenation (ECMO) support is increasingly being used as an alternative to traditional temporary RV support. We report our institutional experience with ECMO-facilitated RV support after left ventricular assist device implantation. METHODS: We retrospectively reviewed the concept of temporary ECMO support for perioperative RV failure in 32 consecutive left ventricular assist device (mean age 52 ± 14 years; male 84...
October 16, 2017: European Journal of Cardio-thoracic Surgery
https://www.readbyqxmd.com/read/29040402/is-postspinal-hypotension-a-sign-of-impaired-cardiac-performance-in-the-elderly-an-observational-mechanistic-study
#6
J Jakobsson, S H Kalman, M Lindeberg-Lindvet, E Bartha
Background: We have previously reported that stroke volume is reduced in a majority of elderly patients undergoing surgical repair of hip fracture before and after intrathecal injection of anaesthetic. We aimed to investigate these observations further in a prospective study of elderly patients undergoing elective hip or knee arthroplasty under spinal anaesthesia. Methods: Patients ≥65 yr undergoing elective arthroplasty were monitored with LiDCOplus™ preoperatively (baseline), before and continuously for 45 min after spinal anaesthesia...
October 10, 2017: British Journal of Anaesthesia
https://www.readbyqxmd.com/read/29036370/estimation-of-the-effects-of-multipoint-pacing-on-battery-longevity-in-routine-clinical-practice
#7
Finn Akerström, Irene Narváez, Alberto Puchol, Marta Pachón, Cristina Martín-Sierra, Moisés Rodríguez-Mañero, Luis Rodríguez-Padial, Miguel A Arias
Aims: Multipoint pacing (MPP) permits simultaneous multisite pacing of the left ventricle (LV); initial studies suggest haemodynamic and clinical benefits over conventional (single LV site) cardiac resynchronization therapy (CRT). The aim of this study was to estimate the impact of MPP activation on battery longevity in routine clinical practice. Methods and results: Patient (n = 46) and device data were collected from two centres at least 3 months after MPP-CRT device implantation...
September 23, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/29029934/ability-of-pulse-wave-transit-time-to-detect-changes-in-stroke-volume-and-to-estimate-cardiac-output-compared-to-thermodilution-technique-in-isoflurane-anaesthetised-dogs
#8
H Sano, J P Chambers
OBJECTIVE: To evaluate the ability of pulse wave transit time (PWTT) to detect changes in stroke volume (SV) and to estimate cardiac output (CO) compared with the thermodilution technique in isoflurane-anaesthetized dogs. STUDY DESIGN: Prospective, experimental study. ANIMALS: Eight adult laboratory dogs. METHODS: The dogs were anaesthetized with isoflurane and mechanically ventilated. Reference CO (TDCO) was measured via a pulmonary artery catheter using the thermodilution technique and reference SV (TDSV) was calculated...
April 26, 2017: Veterinary Anaesthesia and Analgesia
https://www.readbyqxmd.com/read/29019615/haemodynamic-profiles-of-children-with-end-stage-heart-failure
#9
Sharon Chen, John C Dykes, Doff B McElhinney, Robert J Gajarski, Andrew Y Shin, Seth A Hollander, Melanie E Everitt, Jack F Price, Ravi R Thiagarajan, Steven J Kindel, Joseph W Rossano, Beth D Kaufman, Lindsay J May, Elizabeth Pruitt, David N Rosenthal, Christopher S Almond
Aims: To evaluate associations between haemodynamic profiles and symptoms, end-organ function and outcome in children listed for heart transplantation. Methods and results: Children <18 years listed for heart transplant between 1993 and 2013 with cardiac catheterization data [pulmonary capillary wedge pressure (PCWP), right atrial pressure (RAP), and cardiac index (CI)] in the Pediatric Heart Transplant Study database were included. Outcomes were New York Heart Association (NYHA)/Ross classification, renal and hepatic dysfunction, and death or clinical deterioration while on waitlist...
October 7, 2017: European Heart Journal
https://www.readbyqxmd.com/read/28981519/pulmonary-hypertension-subtypes-associated-with-hereditary-haemorrhagic-telangiectasia-haemodynamic-profiles-and-survival-probability
#10
Sabine Revuz, Evelyne Decullier, Isabelle Ginon, Nicolas Lamblin, Pierre-Yves Hatron, Pierre Kaminsky, Marie-France Carette, Pascal Lacombe, Anne-Claire Simon, Sophie Rivière, Jean-Robert Harlé, Alain Fraisse, Christian Lavigne, Vanessa Leguy-Seguin, Ari Chaouat, Chahera Khouatra, Sophie Dupuis-Girod, Eric Hachulla
BACKGROUND: Different pulmonary hypertension (PH) mechanisms are associated with hereditary haemorrhagic telangiectasia (HHT). METHODS AND RESULTS: We conducted a retrospective study of all suspected cases of PH (echocardiographically estimated systolic pulmonary artery pressure [sPAP] ≥ 40 mmHg) in patients with definite HHT recorded in the French National Reference Centre for HHT database. When right heart catheterization (RHC) was performed, PH cases were confirmed and classified among the PH groups according to the European guidelines...
2017: PloS One
https://www.readbyqxmd.com/read/28970630/valvular-heart-disease-and-anaesthesia
#11
REVIEW
Abhijit Paul, Sucharita Das
Valvular heart disease presents as mixed spectrum lesion in healthcare settings in the third-world and developing countries. Rheumatic heart disease still forms the bulk of the aetiopathology of valve lesions. Mitral and aortic valve lesions top the list of valvular pathology. A thorough understanding of the pathophysiology of valvular heart disease is essential while planning anaesthesia and perioperative care for such patients. Meticulous use of optimal fluids, close monitoring of the changing haemodynamics and avoidance of situations that can cause major reduction of cardiac output and fluid shifts are mandatory to achieve good clinical outcome...
September 2017: Indian Journal of Anaesthesia
https://www.readbyqxmd.com/read/28911286/the-effect-of-a-surgery-specific-cardiac-output-guided-haemodynamic-algorithm-on-outcomes-in-patients-undergoing-pancreaticoduodenectomy-in-a-high-volume-centre-a-retrospective-comparative-study
#12
L Weinberg, J Banting, L Churilov, R L McLeod, K Fernandes, I Chao, T Ho, D Ianno, V Liang, V Muralidharan, C Christophi, M Nikfarjam
In this retrospective observational study performed in a high-volume hepatobiliary-pancreatic unit, we evaluated the effect of a surgery-specific goal-directed therapy (GDT) physiologic algorithm on complications and length of hospital stay. We compared patients who underwent pancreaticoduodenectomy with either a standardised Enhanced Recovery After Surgery program (usual care group), or a standardised Enhanced Recovery After Surgery program in combination with a surgery-specific cardiac output-guided algorithm (GDT group)...
September 2017: Anaesthesia and Intensive Care
https://www.readbyqxmd.com/read/28895094/fluid-loading-and-norepinephrine-infusion-mask-the-left-ventricular-preload-decrease-induced-by-pleural-effusion
#13
Kristian Borup Wemmelund, Viktor Kromann Ringgård, Simon Tilma Vistisen, Janus Adler Hyldebrandt, Erik Sloth, Peter Juhl-Olsen
BACKGROUND: Pleural effusion (PLE) may lead to low blood pressure and reduced cardiac output. Low blood pressure and reduced cardiac output are often treated with fluid loading and vasopressors. This study aimed to determine the impact of fluid loading and norepinephrine infusion on physiologic determinants of cardiac function obtained by ultrasonography during PLE. METHODS: In this randomised, blinded, controlled laboratory study, 30 piglets (21.9 ± 1.3 kg) had bilateral PLE (75 mL/kg) induced...
September 11, 2017: Intensive Care Medicine Experimental
https://www.readbyqxmd.com/read/28892884/effect-of-metaboreflex-on-cardiovascular-system-in-subjects-of-metabolic-syndrome
#14
Pramita Dubey, Sunita Tiwari, Manish Bajpai, Kalpana Singh, Praveen Jha
INTRODUCTION: Metaboreflex is a reflex in which muscle receptors send signals regarding metabolic (metabolites accumulation like lactic acid, potassium, adenosine) conditions of the muscles to nucleus tractus solitarius via afferent III and IV fibres to cause haemodynamic adjustments in order to regulate blood flow on the basis of the status of contracting muscle. Dysregulation in its mechanism in metabolic syndrome is demonstrated. AIM: To study the effect of metaboreflex by both isometric and rhythmic handgrip exercise on CVS parameters {Blood Pressure (BP), Cardiac Output (CO) and Systemic Vascular Resistance (SVR)} in subjects of metabolic syndrome...
July 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28880931/restrictive-intraoperative-fluid-optimisation-algorithm-improves-outcomes-in-patients-undergoing-pancreaticoduodenectomy-a-prospective-multicentre-randomized-controlled-trial
#15
RANDOMIZED CONTROLLED TRIAL
Laurence Weinberg, Damian Ianno, Leonid Churilov, Ian Chao, Nick Scurrah, Clive Rachbuch, Jonathan Banting, Vijaragavan Muralidharan, David Story, Rinaldo Bellomo, Chris Christophi, Mehrdad Nikfarjam
We aimed to evaluate perioperative outcomes in patients undergoing pancreaticoduodenectomy with or without a cardiac output goal directed therapy (GDT) algorithm. We conducted a multicentre randomised controlled trial in four high volume hepatobiliary-pancreatic surgery centres. We evaluated whether the additional impact of a intraoperative fluid optimisation algorithm would influence the amount of fluid delivered, reduce fluid related complications, and improve length of hospital stay. Fifty-two consecutive adult patients were recruited...
2017: PloS One
https://www.readbyqxmd.com/read/28878952/pathophysiology-of-exercise-intolerance-in-chronic-diseases-the-role-of-diminished-cardiac-performance-in-mitochondrial-and-heart-failure-patients
#16
Jodi McCoy, Matthew Bates, Christopher Eggett, Mario Siervo, Sophie Cassidy, Jane Newman, Sarah A Moore, Grainne Gorman, Michael I Trenell, Lazar Velicki, Petar M Seferovic, John G F Cleland, Guy A MacGowan, Doug M Turnbull, Djordje G Jakovljevic
OBJECTIVE: Exercise intolerance is a clinical hallmark of chronic conditions. The present study determined pathophysiological mechanisms of exercise intolerance in cardiovascular, neuromuscular, and metabolic disorders. METHODS: In a prospective cross-sectional observational study 152 patients (heart failure reduced ejection fraction, n=32; stroke, n=34; mitochondrial disease, n=28; type two diabetes, n=28; and healthy controls, n=30) performed cardiopulmonary exercise testing with metabolic and haemodynamic measurements...
2017: Open Heart
https://www.readbyqxmd.com/read/28874243/central-regional-anaesthesia-in-patients-with-aortic-stenosis-a-systematic-review
#17
Sofia Johansson, Morten Nikolaj Lind
INTRODUCTION: Aortic stenosis is a valvular lesion that poses several haemodynamic challenges for the anaesthesiologist. The use of central regional anaesthesia is traditionally regarded as contraindicated in patients with severe aortic stenosis due to its sympatholytic effect, potentially causing loss of vascular tone and ultimately diminished cardiac output. The aim of this paper was to review current literature to find evidence for or against the use of neuroaxial blockade in patients with aortic stenosis...
September 2017: Danish Medical Journal
https://www.readbyqxmd.com/read/28866972/comparison-of-continous-wave-doppler-ultrasound-monitor-and-echocardiography-to-assess-cardiac-output-in-intensive-care-patients
#18
COMPARATIVE STUDY
Ahmad Elgendy, Ian M Seppelt, Andrew S Lane
BACKGROUND: Continuous-wave Doppler (CWD) ultrasound through the left ventricular outflow tract is one modality used for non-invasive cardiac output measurement. The ultrasonic cardiac output monitor (USCOM) is a relatively new monitor which uses a small, transcutaneous ultrasound probe to measure cardiac output with CWD via the suprasternal window. It is faster and less complex to train new users than conventional echocardiography. In addition to stroke volume (SV), the USCOM can calculate stroke volume variation (SVV) and the Smith-Madigan inotropy index (SMII), which is an estimate of the pre-load independent contractility of the myocardium...
September 2017: Critical Care and Resuscitation: Journal of the Australasian Academy of Critical Care Medicine
https://www.readbyqxmd.com/read/28855727/noninvasive-oscillometric-cardiac-output-determination-in-the-intensive-care-unit-comparison-with-invasive-transpulmonary-thermodilution
#19
Alexander Reshetnik, Friederike Compton, Anna Schölzel, Markus Tölle, Walter Zidek, Markus van der Giet
Assessment of the cardiac output (CO) is usually performed with invasive techniques requiring specialized equipment in the intensive care unit (ICU). With TEL-O-GRAPH (TG), CO can be derived from the oscillometrically obtained brachial pulse wave during the measurement of brachial blood pressure. CO and stroke volume (SV) determinations with TG were compared with transpulmonary thermodilution measurements with the PICCO system (PICCO) in 38 haemodynamically unstable ICU patients with a total of 84 comparison measurements performed...
August 30, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28836157/relevance-of-haemodynamics-in-treating-pre-eclampsia
#20
REVIEW
Christoph Lees, Enrico Ferrazzi
Blood pressure is a way of describing the end result of changes in cardiac output, intravascular volume and peripheral resistance. It has certain advantages in that it is a reproducible and easily measured parameter, but in itself, it offers only a limited understanding of the underlying haemodynamics. In pregnancy, profound haemodynamic changes occur and in hypertensive diseases of pregnancy defining a condition by blood pressure alone risks missing the underlying cause. Partly, this has been a problem of ascribing the cause of hypertensive syndromes to the placenta which has inhibited rigorous research into other possible causes of haemodynamic dysfunction...
August 23, 2017: Current Hypertension Reports
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