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Hemodynamic monitoring response

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https://www.readbyqxmd.com/read/27907091/real-time-fluorescence-measurements-of-ros-and-ca2-in-ischemic-reperfused-rat-hearts-detectable-increases-occur-only-after-mitochondrial-pore-opening-and-are-attenuated-by-ischemic-preconditioning
#1
Tatyana Andrienko, Philippe Pasdois, Andreas Rossbach, Andrew P Halestrap
Mitochondrial permeability transition pore (mPTP) opening is critical for ischemia / reperfusion (I/R) injury and is associated with increased [Ca2+] and reactive oxygen species (ROS). Here we employ surface fluorescence to establish the temporal sequence of these events in beating perfused hearts subject to global I/R. A bespoke fluorimeter was used to synchronously monitor surface fluorescence and reflectance of Langendorff-perfused rat hearts at multiple wavelengths, with simultaneous measurements of hemodynamic function...
2016: PloS One
https://www.readbyqxmd.com/read/27886191/hemodynamic-and-metabolic-effects-of-a-new-pediatric-dobutamine-formulation-in-hypoxic-newborn-pigs
#2
Victoria E Mielgo, Adolf Valls-I-Soler, Juan M Lopez de Heredia, Heike Rabe, Carmen Rey-Santano
BACKGROUND: The aim of our study was to measure drug-related changes in hemodynamics and oxygen metabolism in response to different doses of an age-appropriate dobutamine formulation in hypoxic pigs. A secondary aim was to validate superior vena cava flow (SVCF) as a marker of cardiac index (CI) for subsequent clinical trials of this formulation in humans. METHODS: Newborn pigs (n=18) were exposed to 2h-hypoxia (10-15% oxygen) followed by reoxygenation (21-30% oxygen 4h)...
November 25, 2016: Pediatric Research
https://www.readbyqxmd.com/read/27871575/dose-requirements-of-alfentanil-to-eliminate-autonomic-responses-during-rapid-sequence-induction-with-thiopental-4-mg-kg-and-rocuronium-0-6-mg-kg
#3
Mohammad H Abou-Arab, Morten Rostrup, Tom Heier
STUDY OBJECTIVE: Opioids are integral part of anesthesia induction, but information on optimal dosing is limited. We aimed to determine doses of alfentanil needed to eliminate increases in 5 autonomic response variables (plasma concentrations of epinephrine, norepinephrine and vasopressin, arterial blood pressure [ABP], and heart rate) during rapid-sequence induction of anesthesia with thiopental 4 mg/kg and rocuronium 0.6 mg/kg. DESIGN: Prospective, randomized, observer-blinded, interventional clinical study...
December 2016: Journal of Clinical Anesthesia
https://www.readbyqxmd.com/read/27859989/effects-of-high-resolution-esophageal-manometry-on-oxygen-saturation-and-hemodynamic-function
#4
Vicente Ortiz, Esteban Sáez-González, Michel Blé, Francia Carolina Díaz-Jaime, Carmen Vinaixa, Vicente Garrigues
The effect of high-resolution esophageal manometry (HRM) on oxygen saturation (SaO2 ) and hemodynamic function has not been previously evaluated. This was a prospective study of consecutive patients referred for HRM. Demographic and clinical data were collected on all patients. The study variables included SaO2 , heart rate (HR) and blood pressure (BP). SaO2 and HR were measured at baseline, during intubation, during and 5 min after HRM. BP was measured at baseline, during and after HRM. 158 (56% women) patients with a mean age of 56 (SD 15) years were included...
November 9, 2016: Diseases of the Esophagus: Official Journal of the International Society for Diseases of the Esophagus
https://www.readbyqxmd.com/read/27849259/reduced-systolic-volume-main-pathophysiological-mechanism-in-patients-with-orthostatic-intolerance
#5
Maria Zildany P Távora-Mehta, Niraj Mehta, Adriano Magajevski, Larissa de Oliveira, Débora Lee Smith Maluf, Letícia Concato, Eduardo Doubrawa, Márcio Rogério Ortiz, Cláudio L Pereira da Cunha
BACKGROUND: Orthostatic intolerance patients' pathophysiological mechanism is still obscure, contributing to the difficulty in their clinical management. OBJECTIVE: To investigate hemodynamic changes during tilt test in individuals with orthostatic intolerance symptoms, including syncope or near syncope. METHODS: Sixty-one patients who underwent tilt test at - 70° in the phase without vasodilators were divided into two groups. For data analysis, only the first 20 minutes of tilting were considered...
October 2016: Arquivos Brasileiros de Cardiologia
https://www.readbyqxmd.com/read/27815151/right-atrial-pressure-in-the-critically-ill-how-to-measure-what-is-the-value-what-are-the-limitations
#6
REVIEW
Sheldon Magder
Right atrial pressure (Pra) is determined by the interaction of the function of the heart as a pump, called cardiac function, and the factors that determine the return of blood to heart, called return function. Thus, monitoring Pra or its surrogate, central venous pressure (CVP), can give important insights into mechanisms behind changes in hemodynamic status, responses to interventions, and the likelihood of diagnoses. Examination of the components of the Pra tracing, especially during the ventilator cycle, also can give information about right heart diastolic function, status of the tricuspid valve, volume responsiveness and the cardiac rhythm...
November 1, 2016: Chest
https://www.readbyqxmd.com/read/27803982/magnesium-in-obstetric-anesthesia-and-intensive-care
#7
REVIEW
Marija S Kutlesic, Ranko M Kutlesic, Tatjana Mostic-Ilic
Magnesium, one of the essential elements in the human body, has numerous favorable effects that offer a variety of possibilities for its use in obstetric anesthesia and intensive care. Administered as a single intravenous bolus dose or a bolus followed by continuous infusion during surgery, magnesium attenuates stress response to endotracheal intubation, and reduces intraoperative anesthetic and postoperative analgesic requirements, while at the same time preserving favorable hemodynamics. Applied as part of an intrathecal or epidural anesthetic mixture, magnesium prolongs the duration of anesthesia and diminishes total postoperative analgesic consumption with no adverse maternal or neonatal effects...
November 1, 2016: Journal of Anesthesia
https://www.readbyqxmd.com/read/27788791/intraoperative-pleth-variability-index-is-linked-to-delayed-graft-function-after-kidney-transplantation
#8
O Collange, L Jazaerli, A Lejay, C Biermann, S Caillard, B Moulin, N Chakfe, F Severac, M Schaeffer, P-M Mertes, A Steib
BACKGROUND: Delayed graft function (DGF) is an early postoperative complication of kidney transplantation (KT) predisposing to acute rejection and lower graft survival. Intraoperative arterial hypotension and hypovolemia are associated with DGF. Central venous pressure (CVP) is used to estimate volemia but its reliability has been criticized. Pleth variability index (PVI) is a hemodynamic parameter predicting fluid responsiveness. The aim of this study was to examine the relationship between intraoperative PVI and CVP values and the occurrence of DGF...
October 2016: Transplantation Proceedings
https://www.readbyqxmd.com/read/27774825/optimum-treatment-of-vasopressor-dependent-distributive-shock
#9
Jean-Louis Vincent, Marc Leone
Distributive shock is associated with decreased systemic vascular resistance and altered oxygen extraction. Septic shock is the most frequent form of distributive shock. In shock states, duration of hypotension is associated with poor outcomes. The speed at which treatment to restore adequate perfusion pressure is initiated is, therefore, important to improve survival. Areas covered: This review presents an overview of the literature related to the management of vasopressor-dependent distributive shock, and in particular the relationship between arterial pressure and organ perfusion and function...
November 7, 2016: Expert Review of Anti-infective Therapy
https://www.readbyqxmd.com/read/27752520/probe-hosted-silicon-photomultipliers-for-time-domain-functional-near-infrared-spectroscopy-phantom-and-in-vivo-tests
#10
Rebecca Re, Edoardo Martinenghi, Alberto Dalla Mora, Davide Contini, Antonio Pifferi, Alessandro Torricelli
We report the development of a compact probe for time-domain (TD) functional near-infrared spectroscopy (fNIRS) based on a fast silicon photomultiplier (SiPM) that can be put directly in contact with the sample without the need of optical fibers for light collection. We directly integrated an avalanche signal amplification stage close to the SiPM, thus reducing the size of the detection channel and optimizing the signal immunity to electromagnetic interferences. The whole detection electronics was placed in a plastic screw holder compatible with the electroencephalography standard cap for measurement on brain or with custom probe holders...
October 2016: Neurophotonics
https://www.readbyqxmd.com/read/27747447/cardioprotective-effects-of-mitochondria-targeted-peptide-sbt-20-in-two-different-models-of-rat-ischemia-reperfusion
#11
Wangde Dai, Elissa Cheung, Rick J Alleman, Justin B Perry, Mitchell E Allen, David A Brown, Robert A Kloner
PURPOSE: Dysfunctional mitochondria are considered to be the major source of intracellular reactive oxygen species and play a central role in the pathophysiology of myocardial ischemia/reperfusion. This study sought to determine effects of mitochondria-targeted cytoprotective peptide SBT-20 on myocardial infarct size in two different models of ischemia/reperfusion. METHODS: For in vivo studies, anesthetized Sprague Dawley rats were subjected to 30 min of coronary artery occlusion followed by 3 h of reperfusion...
October 17, 2016: Cardiovascular Drugs and Therapy
https://www.readbyqxmd.com/read/27736042/lung-and-cardiac-ultrasound-for-hemodynamic-monitoring-of-patients-with-severe-pre-eclampsia
#12
J Ambrozic, G Brzan Simenc, K Prokselj, N Tul, M Cvijic, M Lucovnik
OBJECTIVE: To evaluate lung and cardiac ultrasound for the assessment of fluid tolerance and fluid responsiveness before and after delivery in pregnant women with severe pre-eclampsia (PE). METHODS: This was a prospective observational study of singleton pregnant women with severe PE and healthy term controls. Lung ultrasound echo comet score (ECS), which denotes the amount of extravascular lung water, was obtained using the 28-rib interspaces technique. The echocardiographic E/e' ratio, measured by pulsed-wave and tissue Doppler, was used as a marker of diastolic left ventricular function...
October 13, 2016: Ultrasound in Obstetrics & Gynecology
https://www.readbyqxmd.com/read/27730703/subthalamic-nucleus-deep-brain-stimulation-alters-prefrontal-correlates-of-emotion-induction
#13
Sarah K B Bick, Bradley S Folley, Jutta S Mayer, Sohee Park, P David Charles, Corrie R Camalier, Srivatsan Pallavaram, Peter E Konrad, Joseph S Neimat
OBJECTIVES: Deep brain stimulation (DBS) of the subthalamic nucleus (STN) improves motor symptoms in advanced Parkinson's disease. STN DBS may also affect emotion, possibly by impacting a parallel limbic cortico-striatal circuit. The objective of this study was to investigate changes in prefrontal cortical activity related to DBS during an emotion induction task. MATERIALS AND METHODS: We used near infrared spectroscopy to monitor prefrontal cortex hemodynamic changes during an emotion induction task...
October 12, 2016: Neuromodulation: Journal of the International Neuromodulation Society
https://www.readbyqxmd.com/read/27724845/bmp-smad-signalling-output-is-highly-regionalized-in-cardiovascular-and-lymphatic-endothelial-networks
#14
Karen Beets, Michael W Staring, Nathan Criem, Elke Maas, Niels Schellinx, Susana M Chuva de Sousa Lopes, Lieve Umans, An Zwijsen
BACKGROUND: Bone morphogenetic protein (BMP) signalling has emerged as a fundamental pathway in endothelial cell biology and deregulation of this pathway is implicated in several vascular disorders. BMP signalling output in endothelial cells is highly context- and dose-dependent. Phosphorylation of the BMP intracellular effectors, SMAD1/5/9, is routinely used to monitor BMP signalling activity. To better understand the in vivo context-dependency of BMP-SMAD signalling, we investigated differences in BMP-SMAD transcriptional activity in different vascular beds during mouse embryonic and postnatal stages...
October 10, 2016: BMC Developmental Biology
https://www.readbyqxmd.com/read/27699105/imaging-hemodynamic-response-after-ischemic-stroke-in-mouse-cortex-using-visible-light-optical-coherence-tomography
#15
Siyu Chen, Qi Liu, Xiao Shu, Brian Soetikno, Shanbao Tong, Hao F Zhang
Visible-light optical coherence tomography (Vis-OCT) is an emerging technology that can image hemodynamic response in microvasculature. Vis-OCT can retrieve blood oxygen saturation (sO2) mapping using intrinsic optical absorption contrast while providing high-resolution anatomical vascular structures at the same time. To improve the accuracy of Vis-OCT oximetry on vessels embedded in highly scattering medium, i.e., brain cortex, we developed and formulated a novel dual-depth sampling and normalization strategy that allowed us to minimize the detrimental effect of ubiquitous tissue scattering...
September 1, 2016: Biomedical Optics Express
https://www.readbyqxmd.com/read/27693031/initial-in%C3%A2-vitro-and-in%C3%A2-vivo-evaluation-of-a-self-monitoring-prosthetic-bypass-graft
#16
Richard F Neville, Samit K Gupta, David J Kuraguntla
OBJECTIVE: Prosthetic grafts used for lower extremity revascularization and dialysis access fail because of hyperplastic stenosis and thrombosis. Graft surveillance is advocated to monitor function; however, graft failure can occur between episodic examinations. An innovative sensor with wireless, microchip technology allows automated surveillance with assessment of graft function using a "cloud"-based algorithm. We performed proof-of-concept experiments with in vitro and in vivo models to assess the feasibility such a real-time graft surveillance system...
September 29, 2016: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/27670600/risk-and-predictors-of-variceal-bleeding-in-cirrhosis-patients-receiving-primary-prophylaxis-with-non-selective-beta-blockers
#17
Richa Shukla, Jennifer Kramer, Yumei Cao, Jun Ying, Aylin Tansel, Annette Walder, Shailesh Advani, Hashem B El-Serag, Fasiha Kanwal
OBJECTIVES: Prior studies have demonstrated the efficacy of non-selective beta-blockers (NSBB) in preventing first variceal bleeding in patients with cirrhosis. However, little is known about the overall effectiveness of NSBB in routine clinical care. METHODS: We conducted a retrospective cohort study of cirrhotic patients without prior bleeding who initiated a NSBB (propranolol, nadolol) at any Veterans Administration facility between 2008 and 2013. The primary outcome was variceal bleeding within 12 months...
September 27, 2016: American Journal of Gastroenterology
https://www.readbyqxmd.com/read/27666779/exploring-spinal-cord-protection-by-remote-ischemic-preconditioning-an-experimental-study
#18
Johanna Herajärvi, Tuomas Anttila, Henna Sarja, Caius Mustonen, Henri Haapanen, Tuomas Mäkelä, Fredrik Yannopoulos, Tuomo Starck, Mika Kallio, Hannu Tuominen, Ulla Puistola, Peeter Karihtala, Kai Kiviluoma, Vesa Anttila, Tatu Juvonen
BACKGROUND: Paraplegia is one of the most severe complications occurring after the repair of thoracic and thoracoabdominal aortic aneurysms. Remote ischemic preconditioning (RIPC) has been shown to mitigate neurologic damage, and this study assessed its efficacy in preventing spinal cord ischemia. METHODS: The study randomized 16 female pigs into an RIPC group (n = 8) and a control group (n = 8). The RIPC group underwent four cycles of 5-minute ischemia-reperfusion episodes by intermittent occlusion of the left iliac artery...
September 22, 2016: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/27659110/acute-hyperglycemia-suppresses-left-ventricular-diastolic-function-and-inhibits-autophagic-flux-in-mice-under-prohypertrophic-stimulation
#19
Jiahe Xie, Kai Cui, Huixin Hao, Yingxue Zhang, Hairuo Lin, Zhenhuan Chen, Xiaobo Huang, Shiping Cao, Wangjun Liao, Jianping Bin, Masafumi Kitakaze, Yulin Liao
BACKGROUND: Left ventricular (LV) dysfunction is closely associated with LV hypertrophy or diabetes, as well as insufficient autophagic flux. Acute or chronic hyperglycemia is a prognostic factor for patients with myocardial infarction. However, the effect of acute hyperglycemia on LV dysfunction of the hypertrophic heart and the mechanisms involved are still unclear. This study aimed to confirm our hypothesis that either acute or chronic hyperglycemia suppresses LV diastolic function and autophagic flux...
September 22, 2016: Cardiovascular Diabetology
https://www.readbyqxmd.com/read/27613151/treatment-for-unstable-slipped-capital-femoral-epiphysis-current-status-and-future-challenge-in-japan
#20
Takuya Otani, Tohru Futami, Atsushi Kita, Toshio Kitano, Takashi Saisu, Shinichi Satsuma, Yasuhiko Kawaguchi
BACKGROUND: Treatment for unstable slipped capital femoral epiphysis (SCFE) is challenging and controversial. For many years, the debate centered around closed treatments and especially the pros and cons of manual reduction and its concrete procedure. However, recent studies reported on open treatments such as open reduction through an anterior approach and modified Dunn procedure. Being in a period of such transition, we investigated the current status and future challenge of treatment for unstable SCFE...
September 6, 2016: Journal of Orthopaedic Science: Official Journal of the Japanese Orthopaedic Association
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