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https://www.readbyqxmd.com/read/29783282/sustained-conduction-of-vasomotor-responses-in-rat-mesenteric-arteries-in-a-two-compartment-in-vitro-setup
#1
Teresa Palao, Angela van Weert, Anne de Leeuw, Judith de Vos, Erik N T P Bakker, Ed van Bavel
AIM: Conduction of vasomotor responses may contribute to long-term regulation of resistance artery function and structure. Most previous studies have addressed conduction of vasoactivity only during very brief stimulations. We developed a novel setup that allows the local pharmacological stimulation of arteries in vitro for extended periods of time, and studied the conduction of vasomotor responses in rat mesenteric arteries under those conditions. METHODS: The new in vitro set up was based on the pressure myograph...
May 21, 2018: Acta Physiologica
https://www.readbyqxmd.com/read/29756401/alpha-1-adrenergic-stimulation-selectively-enhances-endothelium-mediated-vasodilation-in-rat-cremaster-arteries
#2
Ramesh C Mishra, Mohammad M Rahman, Michael J Davis, Heike Wulff, Michael A Hill, Andrew P Braun
We have systematically investigated how vascular smooth muscle α1 -adrenoceptor activation impacts endothelium-mediated vasodilation in isolated, myogenically active, rat cremaster muscle 1A arteries. Cannulated cremaster arteries were pressurized intraluminally to 70 mmHg to induce myogenic tone, and exposed to vasoactive agents via bath superfusion at 34°C. Smooth muscle membrane potential was measured via sharp microelectrode recordings in pressurized, myogenic arteries. The α1 -adrenergic agonist phenylephrine (25-100 nmol/L) produced further constriction of myogenic arteries, but did not alter the vasorelaxant responses to acetylcholine (0...
May 2018: Physiological Reports
https://www.readbyqxmd.com/read/29750814/one-year-mortality-after-recovery-from-critical-illness-a-retrospective-cohort-study
#3
Sharukh Lokhandwala, Ned McCague, Abdullah Chahin, Braiam Escobar, Mengling Feng, Mohammad M Ghassemi, David J Stone, Leo Anthony Celi
RATIONALE: Factors associated with one-year mortality after recovery from critical illness are not well understood. Clinicians generally lack information regarding post-hospital discharge outcomes of patients from the intensive care unit, which may be important when counseling patients and families. OBJECTIVE: We sought to determine which factors among patients who survived for at least 30 days post-ICU admission are associated with one-year mortality. METHODS: Single-center, longitudinal retrospective cohort study of all ICU patients admitted to a tertiary-care academic medical center from 2001-2012 who survived ≥30 days from ICU admission...
2018: PloS One
https://www.readbyqxmd.com/read/29734754/polarised-vegfa-signalling-at-vascular-blood%C3%A2-neural-barriers
#4
REVIEW
Silvia Dragoni, Patric Turowski
At blood⁻neural barriers, endothelial VEGFA signalling is highly polarised, with entirely different responses being triggered by luminal or abluminal stimulation. These recent findings were made in a field which is still in its mechanistic infancy. For a long time, endothelial polarity has intuitively been presumed, and likened to that of epithelial cells, but rarely demonstrated. In the cerebral and the retinal microvasculature, the uneven distribution of VEGF receptors 1 and 2, with the former predominant on the luminal and the latter on the abluminal face of the endothelium, leads to a completely polarised signalling response to VEGFA...
May 5, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29730991/feasibility-of-cardiovascular-magnetic-resonance-to-detect-oxygenation-deficits-in-patients-with-multi-vessel-coronary-artery-disease-triggered-by-breathing-maneuvers
#5
Kady Fischer, Kyohei Yamaji, Silvia Luescher, Yasushi Ueki, Bernd Jung, Hendrik von Tengg-Kobligk, Stephan Windecker, Matthias G Friedrich, Balthasar Eberle, Dominik P Guensch
BACKGROUND: Hyperventilation with a subsequent breath-hold has been successfully used as a non-pharmacological vasoactive stimulus to induce changes in myocardial oxygenation. The purpose of this pilot study was to assess if this maneuver is feasible in patients with multi-vessel coronary artery disease (CAD), and if it is effective at detecting coronary artery stenosis > 50% determined by quantitative coronary angiography (QCA). METHODS: Twenty-six patients with coronary artery stenosis (QCA > 50% diameter stenosis) underwent a contrast-free cardiovascular magnetic resonance (CMR) exam in the time interval between their primary coronary angiography and a subsequent percutaneous coronary intervention (PCI, n = 24) or coronary artery bypass (CABG, n = 2) revascularization procedure...
May 7, 2018: Journal of Cardiovascular Magnetic Resonance
https://www.readbyqxmd.com/read/29727218/activated-no-pathway-in-uterine-arteries-during-pregnancy-in-iugr-rat-model
#6
Emilie Bigonnesse, Benoit Sicotte, Michele Brochu
Insufficient development of the utero-placental circulation may contribute to the development of intrauterine growth restriction (IUGR). We developed a rat model of IUGR by administering a low-sodium diet. This diet reduces maternal blood volume expansion and uteroplacental perfusion. We hypothesized that an impaired endothelial function in radial arteries decreases vasorelaxation and lowers placental perfusion in this IUGR model. The objective was to assess radial uterine artery responses to vasoactive agents in the IUGR model, versus controls...
May 4, 2018: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/29703040/electro-acupuncture-attenuates-inflammatory-responses-and-intraabdominal-pressure-in-septic-patients-a-randomized-controlled-trial
#7
Jian-Biao Meng, Yan-Na Jiao, Xiu-Juan Xu, Zhi-Zhen Lai, Geng Zhang, Chun-Lian Ji, Ma-Hong Hu
BACKGROUND: A pathological increase in intraabdominal pressure (IAP) and inflammatory responses have negative effects on splanchnic, respiratory, cardiovascular, renal, and neurological function in septic patients with intestinal dysfunction. Electro-acupuncture (EA) has been evidenced to have a bidirectional neuron-endocrine-immune system regulating effect in patients with intestinal dysfunction. The purpose of current study was to evaluate the effects of EA at "Zusanli" (ST36) and "Shangjuxu" (ST37) on inflammatory responses and IAP in septic patients with intestinal dysfunction manifested syndrome of obstruction of the bowels Qi...
April 2018: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29693466/isoprostane-in-systemic-sclerosis-a-systematic-review-and-meta-analysis
#8
Paul Rj Ames, Mira Merashli, Tommaso Bucci, Jaffar Norouz-Zadeh
OBJECTIVES: to further the knowledge of oxidative stress in systemic sclerosis (SSc) we performed a systematic review and meta-analysis on studies measuring isoprostane, a vasoactive agent deriving from arachidonic acid and implicated in the vasculopathy of SSc. METHODS: systematic search following the PRISMA guidelines in PubMed and EMBASE between January-1990/December-2017 using the terms: oxidative stress, isoprostane, systemic sclerosis, scleroderma. RESULTS: After the screening process 8 studies including 240 SSc patients and 192 controls were included in the systematic review and meta-analysis, 6 investigating urinary and 2 serum isoprostane: random effect meta-analysis revealed isoprostane overgeneration in SSc (p < 0...
April 25, 2018: Modern Rheumatology
https://www.readbyqxmd.com/read/29685512/causes-and-outcomes-of-finger-ischemia-in-hospitalized-patients-in-the-intensive-care-unit
#9
Gregory J Landry, Courtney J Mostul, Daniel S Ahn, Bryant J McLafferty, Timothy K Liem, Erica L Mitchell, Enjae Jung, Cherrie Z Abraham, Amir F Azarbal, Robert B McLafferty, Gregory L Moneta
OBJECTIVE: Vascular surgeons may be consulted to evaluate hospitalized patients with finger ischemia. We sought to characterize causes and outcomes of finger ischemia in intensive care unit (ICU) patients. METHODS: All ICU patients who underwent evaluation for finger ischemia from 2008 to 2015 were reviewed. All were evaluated with finger photoplethysmography. The patients' demographics, comorbidities, ICU care (ventilator status, arterial lines, use of vasoactive medications), finger amputations, and survival were also recorded...
April 20, 2018: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/29669783/vasoactive-intestinal-peptide-ameliorates-acute-myocarditis-and-atherosclerosis-by-regulating-inflammatory-and-autoimmune-responses
#10
Raquel Benitez, Virginia Delgado-Maroto, Marta Caro, Irene Forte-Lago, Mario Duran-Prado, Francisco O'Valle, Andrew H Lichtman, Elena Gonzalez-Rey, Mario Delgado
Vasoactive intestinal peptide (VIP) is a neuropeptide that exerts various vascular and cardioprotective functions and regulates immune function and inflammatory response at multiple levels. However, its role in inflammatory cardiovascular disorders is largely unknown. Myocarditis and atherosclerosis are two inflammatory and autoimmune cardiovascular diseases that cause important adverse circulatory events. In this study, we investigate the therapeutic effects of VIP in various well-established preclinical models of experimental autoimmune myocarditis and atherosclerosis...
April 18, 2018: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/29664811/assessment-of-endothelium-independent-vasodilation-from-methodology-to-clinical-perspectives
#11
Tatsuya Maruhashi, Yasuki Kihara, Yukihito Higashi
: Vascular response to exogenously administered nitroglycerine, an index of endothelium-independent vasodilation, has been used as a control test for the assessment of endothelium-dependent vasodilation (endothelial function) in humans. However, evidence has been accumulating that not only endothelium-dependent vasodilation but also endothelium-independent vasodilation per se is impaired in individuals with cardiovascular risk factors and cardiovascular disease. Impaired endothelium-independent vasodilation is associated with structural vascular alterations and alterations in vascular smooth muscle cells...
April 16, 2018: Journal of Hypertension
https://www.readbyqxmd.com/read/29660924/vasopressor-support-vs-liberal-fluid-administration-in-deep-inferior-epigastric-perforator-diep-free-flap-breast-reconstruction-a-randomized-controlled-trial
#12
A M Anker, L Prantl, C Strauss, V Brébant, N Heine, P Lamby, S Geis, F Schenkhoff, M Pawlik, S M Klein
BACKGROUND: Perioperatively, patients' hemodynamics are modulated predominantly by intravenous fluid administration and vasoactive pharmacological support. Vasopressor agents are suspected to be detrimental on free flap survival by the cause of vasoconstriction of the pedicle with consecutive reduced overall flap perfusion and by aggravation of flap dissection. OBJECTIVE: A novel, standardized fluid restrictive perioperative hemodynamic management was assessed for its feasibility in clinical practice in free flap patients undergoing breast reconstruction...
April 7, 2018: Clinical Hemorheology and Microcirculation
https://www.readbyqxmd.com/read/29627071/ultrasound-versus-anatomical-landmarks-immediate-complications-in-the-central-venous-catheterization-in-children-under-18-years-of-age
#13
D Rivera-Tocancipá, E Díaz-Sánchez, C A Montalvo-Arce
INTRODUCTION: The insertion of a central venous line in children and adolescents is technically more difficult, due to the smaller size of the structures. This can lead to an increase in immediate complications, which can be reduced when using ultrasound. In our institution, the percentage of these complications and the use of ultrasound are unknown. OBJECTIVE: To describe the frequency of immediate complications of central venous catheterisation guided by the ultrasound in a general university hospital, compared to the anatomical landmarks technique in children less than 18years of age...
April 4, 2018: Revista Española de Anestesiología y Reanimación
https://www.readbyqxmd.com/read/29624533/profound-intraoperative-hypotension-associated-with-transfusion-via-the-belmont-fluid-management-system
#14
Joanna Miller, Sang Kim, Dieter Adelmann, Bryan Hill, Nicolette Schlichting, Natalie Smith, Samuel DeMaria, Jeron Zerillo
This retrospective observational case series conducted at 2 large academic centers over a 4-year period consists of 15 cases of profound hypotension in surgical patients immediately after initiation of the Belmont Fluid Management System for rapid transfusion of blood products. Halting the infusion and administering vasoactive agents led to resolution of hypotension. Repeat transfusion with the Belmont system resulted in repeat hypotension unless counteracted with vasopressors. No etiology was elucidated. This represents the largest documented association of acute hypotensive transfusion reaction with any rapid infusion system in surgical patients...
April 5, 2018: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/29621027/cardiac-output-monitoring-how-to-choose-the-optimal-method-for-the-individual-patient
#15
Bernd Saugel, Jean-Louis Vincent
PURPOSE OF REVIEW: To review the different methods available for the assessment of cardiac output (CO) and describe their specific indications in intensive care and perioperative medicine. RECENT FINDINGS: In critically ill patients, persistent circulatory shock after initial resuscitation is an indication for the assessment of CO to monitor the response to fluids and vasoactive agents. In patients with circulatory shock associated with right ventricular dysfunction, pulmonary artery hypertension, or acute respiratory distress syndrome, invasive CO monitoring using indicator dilution methods is indicated...
June 2018: Current Opinion in Critical Care
https://www.readbyqxmd.com/read/29607780/brain-death-in-intensive-care-units-problems-differences-in-methods-of-diagnosis-and-donor-care
#16
Aykut Sarıtaş, Burcu Acar Çinleti, Çiler Zincircioğlu, Uğur Uzun, Işıl Köse, Nimet Şenoğlu
OBJECTIVES: Our aim was to investigate the most common problems in diagnosing brain death, the care of the organ donor, and organ donation after death. MATERIALS AND METHODS: A survey was sent randomly to clinicians working in national intensive care units in Turkey. The survey, which consisted of 17 questions for clinicians, had 163 responders. RESULTS: The most common cause of brain death was traumatic brain injury. Although 22% of clinicians found the apnea test necessary for brain death diagnosis, 78% stated that it could be used as an optional confirmatory test...
April 2, 2018: Experimental and Clinical Transplantation
https://www.readbyqxmd.com/read/29587461/the-impact-of-t-2-toxin-on-vasoactive-intestinal-polypeptide-like-immunoreactive-vip-li-nerve-structures-in-the-wall-of-the-porcine-stomach-and-duodenum
#17
Krystyna Makowska, Kazimierz Obremski, Slawomir Gonkowski
T-2 toxin is a secondary metabolite of some Fusarium species. It is well-known that this substance can harmfully impact living organisms. Among others, thanks to the ability of crossing the blood-brain barrier, T-2 toxin can affect the central nervous system. Mycotoxins mostly get into the organism through the digestive tract; therefore, first of all they have to break the intestinal barrier, wherein the important component is the enteric nervous system (ENS). However, knowledge about the impact of T-2 toxin on the ENS is rather scant...
March 26, 2018: Toxins
https://www.readbyqxmd.com/read/29582666/a-blast-from-the-past-revival-of-angiotensin-ii-for-vasodilatory-shock
#18
Brittany D Bissell, Kelsey Browder, Matt McKenzie, Alexander H Flannery
OBJECTIVE: To review and summarize data on angiotensin II (AT-II), approved by the Food and Drug Administration (FDA) in December 2017 to increase blood pressure in adults with septic or other distributive shock. DATA SOURCES: A PubMed/MEDLINE search was conducted using the following terms: (angiotensin ii OR angiotensin 2) AND (shock) from 1966 to February 2018. STUDY SELECTION AND DATA EXTRACTION: A total of 691 citations were reviewed with only relevant clinical data extracted...
March 1, 2018: Annals of Pharmacotherapy
https://www.readbyqxmd.com/read/29569130/correlation-of-noninvasive-blood-pressure-and-invasive-intra-arterial-blood-pressure-in-patients-treated-with-vasoactive-medications-in-a-neurocritical-care-unit
#19
Ali A Saherwala, Sonja E Stutzman, Mohamed Osman, Junaid Kalia, Stephen A Figueroa, DaiWai M Olson, Venkatesh Aiyagari
BACKGROUND: The correlation between noninvasive (oscillometric) blood pressure (NBP) and intra-arterial blood pressure (IAP) in critically ill patients receiving vasoactive medications in a Neurocritical Care Unit has not been systematically studied. The purpose of this study is to examine the relationship between simultaneously measured NBP and IAP recordings in these patients. METHODS: Prospective observational study of patients (N = 70) admitted to a neurocritical care unit receiving continuous vasopressor or antihypertensive infusions...
March 22, 2018: Neurocritical Care
https://www.readbyqxmd.com/read/29566700/review-of-14-drowning-publications-based-on-the-utstein-style-for-drowning
#20
REVIEW
Allart M Venema, Anthony R Absalom, Ahamed H Idris, Joost J L M Bierens
BACKGROUND: The Utstein style for drowning (USFD) was published in 2003 with the aim of improving drowning research. To support a revision of the USFD, the current study aimed to generate an inventory of the use of the USFD parameters and compare the findings of the publications that have used the USFD. METHODS: A search in Pubmed, Embase, the Cochrane Library, Web of Science and Scopus was performed to identify studies that used the USFD and were published between 01-10-2003 and 22-03-2015...
March 22, 2018: Scandinavian Journal of Trauma, Resuscitation and Emergency Medicine
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