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Vascular doppler

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https://www.readbyqxmd.com/read/28820399/repetitive-muscle-compression-reduces-vascular-mechano-sensitivity-and-the-hyperemic-response-to-muscle-contraction
#1
A Messere, M Turturici, G Millo, S Roatta
Animal studies have shown that the rapid hyperemic response to external muscle compression undergoes inactivation upon repetitive stimulation, but this phenomenon has never been observed in humans. The aim of the present study was to determine whether 1) the vascular mechano-sensitivity underlying muscle compression-induced hyperemia is inactivated in an inter-stimulus interval (ISI)-dependent fashion upon repetitive stimulation, as suggested by animal studies, and 2) whether such inactivation also attenuates contraction-induced hyperemia...
June 2017: Journal of Physiology and Pharmacology: An Official Journal of the Polish Physiological Society
https://www.readbyqxmd.com/read/28819497/-volvulus-of-the-small-intestine-caused-by-mesenteric-lipoma
#2
Papa Alassane Mbaye, Aime Lakh Faye, Aloise Sagna, Ndeye Aby Ndoye, Ndeye Fatou Seck, Oumar Ndour, Gabriel Ngom
We report the case of a 7-year old girl presenting with sub-occlusive syndrome associated with acute paroxysmal abdominal pain at the level of the upper abdomen, vomiting and no evacuation of faeces. Physical examination showed discomfort with palpation of the upper abdomen. Abdominal ultrasound showed poorly limited intraperitoneal tissue formation without vascular features on doppler, exercising a mass effect on the neighborhood structures; mesenteric vessels were in their normal position. This mass on CT scan scorresponded to a well limited lipomatous formation exercising a mass effect on the caecum associated with volvulus of the small intestine...
2017: Pan African Medical Journal
https://www.readbyqxmd.com/read/28817509/high-intensity-exercise-enhances-conduit-artery-vascular-function-in-older-adults
#3
Erika Iwamoto, Josh M Bock, Darren P Casey
PURPOSE: Modulation of vascular function follows an exercise intensity-dependent pattern in young adults. This study aimed to investigate the potential intensity-dependent effects of an acute bout of exercise on conduit and resistance artery function in healthy older adults. METHODS: Eleven healthy older adults (5 males/6 females, 66±1 years) completed 30 minutes of recumbent cycling at 50-55% (low-intensity) and 75-80% (high-intensity) of their age-predicted maximal heart rate on two separate study visits...
August 16, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28817218/bmi-nephroangiosclerosis-and-glomerulonephritis-is-there-any-meeting-point
#4
Antonietta Gigante, Konstantinos Giannakakis, Francesca Di Mario, Biagio Barbano, Edoardo Rosato, Riccardo Pofi, Marcello Di Paolo, Anna Rachele Rocca, Rosario Cianci
BACKGROUND: Overweight has been related to renal arteriolosclerosis and is able to modify intrarenal hemodynamics. Increasing evidences suggest an association between weight excess and primary glomerulonephritis (GN). The aim of this study was to evaluate the relationship between nutritional status and intrarenal arterial stiffness in primary GN associated to arteriolosclerosis. We have considered the glomerular diameter (GD) as morphological parameter in overweight and obese patients...
August 17, 2017: Nephrology
https://www.readbyqxmd.com/read/28816352/pulmonary-artery-wave-propagation-and-reservoir-function-in-conscious-man-impact-of-pulmonary-vascular-disease-respiration-and-dynamic-stress-tests
#5
Junjing Su, Charlotte Manisty, Ulf Simonsen, Luke S Howard, Kim H Parker, Alun D Hughes
Detailed hemodynamic analysis may provide novel insights into the pulmonary circulation. Therefore, wave intensity and reservoir-excess pressure analyses were applied in the pulmonary artery to characterise changes in wave propagation and reservoir function during spontaneous respiration and dynamic stress tests. Right heart catheterisation was performed using a pressure and Doppler flow sensor tipped guidewire to obtain simultaneous pressure and flow velocity measurements in the pulmonary artery in control subjects and patients with pulmonary arterial hypertension (PAH) at rest...
August 17, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/28810992/two-new-effective-tourniquets-for-potential-use-in-the-military-environment-a-serving-soldier-study
#6
Alastair Beaven, Rob Briard, Mark Ballard, Paul Parker
BACKGROUND: Limb tourniquets have been used extensively during modern Middle Eastern conflicts. Despite its undeniable successes, the combat applied tourniquet (C-A-T) has some shortfalls, principally its inability to reliably control lower limb bleeding when applied to the mid-thigh. We tested two tourniquets which may represent an improvement to the combat applied tourniquet; the tactical mechanical tourniquet and the tactical pneumatic tourniquet. METHODS: We recruited 12 healthy service personnel and applied the tactical mechanical tourniquet and tactical pneumatic tourniquet to both lower limbs in a randomly generated sequence...
July 2017: Military Medicine
https://www.readbyqxmd.com/read/28810961/resuscitation-of-hypotensive-traumatic-brain-injured-animals-with-spray-dried-plasma-does-not-adversely-alter-physiology-and-improves-blood-brain-barrier-function
#7
Steven McDaniel, Stephanie Golla, Anthony N Moore, Joe DaCorta, Arthur Bode, Shibani Pati, Pramod K Dash, Jing Zhao
INTRODUCTION: According to the Defense and Veterans Brain Injury Center and the Armed Forces Health Surveillance Center, the number of soldiers who have sustained a traumatic brain injury (TBI) has risen dramatically over the past decade. Studies have shown that brain damage can be exacerbated if blood loss occurs (often occurring in polytrauma). As blood supply is critical for brain function and survival, TBI patients must be properly resuscitated to maintain blood volume, blood pressure, and cerebral perfusion...
July 2017: Military Medicine
https://www.readbyqxmd.com/read/28807722/coronary-microvascular-dysfunction-is-not-associated-with-a-history-of-reproductive-risk-factors-in-women-with-angina-pectoris-an-ipower-substudy
#8
Hannah Elena Suhrs, Anna Meta Kristensen, Anna Bay Rask, Marie Mide Michelsen, Daria Frestad, Naja Dam Mygind, Kira Bové, Eva Prescott
BACKGROUND: Reproductive risk factors such as preeclampsia and recurrent miscarriages have been associated with adverse cardiovascular (CV) events. Underlying coronary microvascular dysfunction (CMD) may be a common denominator. PURPOSE: We investigated whether a history of reproductive risk factors was associated with CMD in women with angina pectoris and no obstructive coronary artery disease (CAD). METHODS: Participants from the iPOWER study, including women with angina pectoris and no obstructive CAD (<50% stenosis), were invited to complete an electronic survey regarding reproductive risk factors: recurrent miscarriages, gestational diabetes, preeclampsia, rhesus immunity, polycystic ovary syndrome and menopausal status as well as migraine and Raynaud phenomenon...
August 11, 2017: Maturitas
https://www.readbyqxmd.com/read/28807201/overexpression-of-thioredoxin1-enhances-functional-recovery-in-a-mouse-model-of-hind-limb-ischemia
#9
Inam A Shaikh, Muhammad Tipu Rishi, Mark Youssef, Vaithinathan Selvaraju, Mahesh Thirunavukkarasu, Gopi Ukani, Rajesh Lakshmanan, J Alexander Palesty, Nilanjana Maulik
BACKGROUND: There is keen interest in finding nonsurgical treatments for peripheral vascular disease (PVD). Previously, we demonstrated that selective activation of Thioredoxin1 (Trx1), a 12-kDa cytosolic protein, initiates redox-dependent signaling and promotes neovascularization after ischemic heart disease. Therefore, Trx1 might possess immense potential to not only treat murine hind limb ischemia (HLI) through effective angiogenesis but also provide PVD patients with nonsurgical therapy to enhance neovascularization and improve blood perfusion...
August 2017: Journal of Surgical Research
https://www.readbyqxmd.com/read/28805949/the-reversible-p2y12-antagonist-act-246475-causes-significantly-less-blood-loss-than-ticagrelor-at-equivalent-antithrombotic-efficacy-in-rat
#10
Markus Rey, Markus Kramberg, Patrick Hess, Keith Morrison, Roland Ernst, Franck Haag, Edgar Weber, Martine Clozel, Martine Baumann, Eva Caroff, Francis Hubler, Markus A Riederer, Beat Steiner
The P2Y12 receptor is a validated target for prevention of major adverse cardiovascular events in patients with acute coronary syndrome. The aim of this study was to compare two direct-acting, reversible P2Y12 antagonists, ACT-246475 and ticagrelor, in a rat thrombosis model by simultaneous quantification of their antithrombotic efficacy and surgery-induced blood loss. Blood flow velocity was assessed in the carotid artery after FeCl3 -induced thrombus formation using a Doppler flow probe. At the same time, blood loss after surgical wounding of the spleen was quantified...
October 2017: Pharmacology Research & Perspectives
https://www.readbyqxmd.com/read/28804248/effect-of-chronic-hepatitis-c-virus-treatment-by-combination-therapy-on-cardiovascular-system
#11
Reda Biomy, Mohamed Abdelshafy, Ahmed Abdelmonem, Hesham Abu-Elenin, George Ghaly
BACKGROUND: The prevalence of hepatitis C virus (HCV) in Egypt is quite high, and the combined oral direct-acting antiviral agents (DAAs) may have impressive results. OBJECTIVE: To assess the cardiovascular effects of DAAs in patients with HCV. METHODS: A total of 170 patients with HCV were divided into 2 groups: first group (100 patients) received triple combination therapy (pegylated interferon alfa, sofosbuvir, and ribavirin, whereas the second group (70 patients) received dual combination therapy (sofosbuvir and simeprevir)...
2017: Clinical Medicine Insights. Cardiology
https://www.readbyqxmd.com/read/28803687/predictors-of-asymptomatic-radiation-induced-abdominal-atherosclerosis
#12
L Cella, R Liuzzi, P Romanelli, M Conson, V D'Avino, M Ottaviano, V Damiano, G Palmieri, R Pacelli, M Mancini
AIMS: To identify predictors of asymptomatic radiation-induced abdominal atherosclerosis in patients treated with radiotherapy and evaluated by abdominal vascular ultrasonography. MATERIALS AND METHODS: Forty-two testicular classic seminoma patients (median age 34 years, range 16-56) undergoing radical inguinal orchiectomy were analysed. Twenty-six patients underwent post-surgery radiotherapy (median total dose 25 Gy, range 25-43), two of them also received chemotherapy (CHT) and 16 patients were treated with surgery alone or by surgery followed by CHT (control group)...
August 10, 2017: Clinical Oncology: a Journal of the Royal College of Radiologists
https://www.readbyqxmd.com/read/28803174/intraoperative-vascular-neuromonitoring-in-patients-with-subarachnoid-hemorrhage-a-pilot-study-using-combined-laser-doppler-spectrophotometry
#13
Emilija Schmitz, Barbara Bischoff, Dennis Wolf, Hubert Schmitt, Ilker Y Eyupoglu, Karl Roessler, Michael Buchfelder, Björn Sommer
OBJECTIVE: Intraoperative monitoring of cerebral microcirculation in patients with subarachnoid hemorrhage (SAH) may predict the postoperative neurological outcome. In this pilot study, we examined the value of a novel non-invasive real-time measurement technique to detect changes in local microcirculation. METHODS: We used the laser-Doppler spectrophotometry system "Oxygen-to-see(O2C)" in 14 patients with SAH Hunt & Hess grade 2 to 5, who underwent microsurgical clipping of cerebral aneurysms...
August 9, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28801985/between-day-reliability-of-local-thermal-hyperaemia-in-the-forearm-and-index-finger-using-single-point-laser-doppler-flowmetry
#14
Gregory W McGarr, Gary J Hodges, Stephen S Cheung
OBJECTIVE: To assess between-day reliability for local thermal hyperaemia (LTH) in glabrous and non-glabrous index finger skin and non-glabrous forearm skin, with single point laser-Doppler flowmetry. METHODS: Part-1: In healthy, habitually active males (n=10), LTH was examined twice (~7-10 d apart) for both skin types on the index finger. Part-2: Identical testing was performed on the volar forearm. Local heating (33-42°C at 1°C·20 s(-1) +20 min at 44°C) was performed at all skin sites and baseline, initial peak, and plateau phases were identified...
August 12, 2017: Microcirculation: the Official Journal of the Microcirculatory Society, Inc
https://www.readbyqxmd.com/read/28792613/peripheral-perfusion-and-oxygenation-in-areas-of-risk-of-skin-integrity-impairment-exposed-to-pressure-patterns-a-phase-i-trial-poter-study
#15
Silvia Garcia-Mayor, Juan Carlos Morilla-Herrera, Inmaculada Lupiáñez-Pérez, Shakira Kaknani Uttumchandani, Álvaro Leon Campos, Marta Aranda-Gallardo, Ana Belén Moya-Suárez, José Miguel Morales-Asencio
AIM: To analyse the changes in peripheral oxygenation and microvascular flow in tissues subjected to different pressure regimes in healthy subjects and in hospitalised patients. BACKGROUND: The presence of pressure ulcers in hospitalised patients is a common complication that has a negative impact on health and often prolongs hospital stay and increases health care costs. DESIGN: Experimental non-controlled, non-randomised study in two phases: preclinical and clinical...
August 9, 2017: Journal of Advanced Nursing
https://www.readbyqxmd.com/read/28791883/dermatofibroma-sonographic-findings-and-pathologic-correlation
#16
Kyu Yeoun Won, So Young Park, Wook Jin, Bark-Lynn Lew
Background Ultrasound has been increasingly used for the evaluation of superficial soft tissue lesions. Dermatofibroma is one of the most common dermal lesions. Experiences in ultrasound examinations of dermatofibromas have been accumulated. Purpose To evaluate sonographic findings of dermatofibroma and to correlate them with pathologic findings. Material and Methods A total of 18 dermatofibromas in 15 patients were included. Sonographic findings were assessed for location, depth, size, shape, margin, spiculation, echogenicity, internal hyperechoic dots, change in echogenicity of adjacent soft tissue, and vascularity, by two musculoskeletal radiologists in consensus...
January 1, 2017: Acta Radiologica
https://www.readbyqxmd.com/read/28791532/diameter-changes-of-retinal-vessels-in-diabetic-retinopathy
#17
REVIEW
Toke Bek
PURPOSE OF REVIEW: The diameter of retinal vessels is an important source of information about retinal blood flow and metabolism. The purpose of the present study is to review how diameter changes of retinal vessels contribute to the development of diabetic retinopathy and may be a marker of the prognosis of the disease. RECENT FINDINGS: The early stages of diabetic retinopathy are accompanied with dilatation of the diameter of retinal vessels and reduced autoregulation...
August 8, 2017: Current Diabetes Reports
https://www.readbyqxmd.com/read/28782913/screening-with-doppler-ultrasound-for-carotid-artery-stenosis-in-patients-with-stroke-or-transient-ischaemic-attack
#18
Tatiana Kristensen, Peter Hovind, Helle K Iversen, Ulrik B Andersen
INTRODUCTION: Carotid endarterectomy of symptomatic internal carotid artery stenosis in patients with stroke or transient ischaemic attack reduces the risk of recurrent stroke, particularly if performed within 2 weeks from the first event. We evaluated the efficiency of a screening programme based on Doppler ultrasound in patients hospitalized with stroke or transient ischaemic attack in the stroke centre at Rigshospitalet, Glostrup, Denmark, concerning timeliness of referral to the vascular surgeon and performance of carotid endarterectomy according to national recommendations...
August 7, 2017: Clinical Physiology and Functional Imaging
https://www.readbyqxmd.com/read/28782410/non-invasive-methods-for-measuring-vascular-changes-in-neurovascular-headaches
#19
Henrik W Schytz, Faisal M Amin, Juliette Selb, David A Boas
Vascular changes during spontaneous headache attacks have been studied over the last 30 years. The interest in cerebral vessels in headache research was initially due to the hypothesis of cerebral vessels as the pain source. Here, we review the knowledge gained by measuring the cerebral vasculature during spontaneous primary headache attacks with the use of single photon emission tomography (SPECT), positron emission tomography (PET), magnetic resonance imaging (MRA) and transcranial Doppler (TCD). Furthermore, the use of near-infrared spectroscopy in headache research is reviewed...
January 1, 2017: Journal of Cerebral Blood Flow and Metabolism
https://www.readbyqxmd.com/read/28781862/acute-arterial-occlusion-after-total-knee-arthroplasty-a-case-report
#20
Kei Inomata, Ichiro Sekiya, Koji Otabe, Tomomasa Nakamura, Masafumi Horie, Hideyuki Koga, Toshifumi Watanabe, Takeshi Muneta
Popliteal artery occlusion after total knee arthroplasty is rare (0.03-0.17%) but can lead to amputation if overlooked. We should carefully assess vascular patency by Doppler ultrasound and ankle brachial pressure index (ABPI) measurement before and after total knee arthroplasty (TKA) operation.
August 2017: Clinical Case Reports
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