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https://www.readbyqxmd.com/read/29785667/cerebral-autoregulation-in-stroke
#1
REVIEW
Pedro Castro, Elsa Azevedo, Farzaneh Sorond
PURPOSE OF REVIEW: Cerebral autoregulation (CA) is a mechanism that maintains cerebral blood flow constant despite fluctuations in systemic arterial blood pressure. This review will focus on recent studies that measured CA non-invasively in acute cerebrovascular events, a feature unique to the transcranial Doppler ultrasound. We will summarize the rationale for CA assessment in acute cerebrovascular disorders and specifically evaluate the existing data on the value of CA measures in relation to clinical severity, guiding management decisions, and prognostication...
May 21, 2018: Current Atherosclerosis Reports
https://www.readbyqxmd.com/read/29783255/management-of-the-patients-with-blunt-renal-trauma-20-years-of-clinical-experience
#2
Leonid P Sarychev, Yaroslav V Sarychev, Hanna L Pustovoyt, Sergiy A Sukhomlin, Sergiy M Suprunenko
OBJECTIVE: Introduction: Blunt renal trauma (BRT) is a dangerous medical condition. The aim: Analysis of effectiveness of conservative and expectant treatment tactics under ultrasound and CT monitoring in patients with blunt renal trauma (BRT). PATIENTS AND METHODS: Materials and methods: The results of treatment of 81 patients with BRT during 20 years (1998-2017) were analyzed. Amount of men was 58 (71.6%), women - 23 (28.4%). Grade I trauma was seen in 37.0% of cases, grade II - in 25...
2018: Wiadomości Lekarskie: Organ Polskiego Towarzystwa Lekarskiego
https://www.readbyqxmd.com/read/29781836/relationship-between-left-main-coronary-artery-plaque-burden-and-nonleft-main-coronary-atherosclerosis-results-from-the-prospect-study
#3
Takehisa Shimizu, Gary S Mintz, Bernard De Bruyne, Naim Z Farhat, Shinji Inaba, Yang Cao, Steven P Marso, Giora Weisz, Patrick W Serruys, Gregg W Stone, Akiko Maehara
OBJECTIVES: Whether the severity of left main coronary artery (LMCA) disease reflects LMCA and overall coronary atherosclerotic burden is not known. We aimed to assess nonculprit LMCA disease characteristics and the relationship with atherosclerosis in the rest of the coronary arteries as well as patient outcomes. PATIENTS AND METHODS: In the PROSPECT study, 697 patients with acute coronary syndromes underwent three-vessel gray-scale and radiofrequency intravascular ultrasound after percutaneous coronary intervention...
May 17, 2018: Coronary Artery Disease
https://www.readbyqxmd.com/read/29781047/a-survey-on-coronary-atherosclerotic-plaque-tissue-characterization-in-intravascular-optical-coherence-tomography
#4
REVIEW
Alberto Boi, Ankush D Jamthikar, Luca Saba, Deep Gupta, Aditya Sharma, Bruno Loi, John R Laird, Narendra N Khanna, Jasjit S Suri
PURPOSE OF REVIEW: Atherosclerotic plaque deposition within the coronary vessel wall leads to arterial stenosis and severe catastrophic events over time. Identification of these atherosclerotic plaque components is essential to pre-estimate the risk of cardiovascular disease (CVD) and stratify them as a high or low risk. The characterization and quantification of coronary plaque components are not only vital but also a challenging task which can be possible using high-resolution imaging techniques...
May 21, 2018: Current Atherosclerosis Reports
https://www.readbyqxmd.com/read/29775982/the-supraclavicular-artery-perforator-flap-a-comparative-study-of-imaging-techniques-used-in-preoperative-mapping
#5
Hemin Oathman Sheriff, Kawa Abdullah Mahmood, Nzar Hamawandi, Aram Jamal Mirza, Jawad Hawas, Esther Granell Moreno, Juan Antonio Clavero, Christopher Hankins, Jaume Masia
BACKGROUND:  The supraclavicular artery flap is an excellent flap for head and neck reconstruction. The aim of this study is to assess imaging techniques to define the precise vascular boundaries of this flap. METHODS:  Six imaging techniques were used for supraclavicular artery mapping in 65 cases; handheld Doppler, triplex ultrasound, computed tomography angiography, magnetic resonance angiography, digital subtraction angiography, and indocyanine green angiography...
May 18, 2018: Journal of Reconstructive Microsurgery
https://www.readbyqxmd.com/read/29774986/everolimus-drug-eluting-stent-performance-in-patients-with-long-coronary-lesions-the-multicenter-longprime-registry
#6
José Francisco Díaz Fernández, Santiago Jesús Camacho Freire, Juan Carlos Fernández Guerrero, Nicolas Delarche, Christophe Bretelle, Javier Zueco Gil, Ramón López Palop, Bruno García Del Blanco, Vicente Mainar Tello, Franck Albert
OBJECTIVES: To assess the efficacy and safety of the Xience Prime everolimus-eluting stent (EES) in long coronary lesions in a real-world population. BACKGROUND: Long lesions are considered difficult technically and in terms of achieving successful clinical outcomes. With first generation DES, MACE can be as high as 10% at a short-medium term follow-up. There are a few data available in this subset regarding the use of second generation DES METHODS: A prospective, multicenter registry of consecutive patients (aged 64...
May 18, 2018: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/29774822/partial-nephrectomy-in-central-renal-tumors
#7
Sohrab Arora, Craig Rogers
Nephron-sparing surgery, especially through a minimally invasive approach, is increasingly being performed for incidentally detected renal masses with excellent outcomes. Tumors in central location remain a surgical challenge during nephron-sparing surgery. In this chapter, we discuss the minimally invasive management of these tumors, which include complex hilar tumors and endophytic central tumors, with a focus on surgical technique. The key to management of these tumors is to maintain good preoperative hydration, achieving adequate exposure of tumor, and the use of intraoperative ultrasound to plan the resection plane...
May 2018: Journal of Endourology
https://www.readbyqxmd.com/read/29771701/dynamic-contrast-enhanced-ultrasound-identifies-microcirculatory-alterations-in-sepsis-induced-acute-kidney-injury
#8
Alexandre Lima, Tom van Rooij, Bulent Ergin, Michele Sorelli, Yasin Ince, Patricia A C Specht, Egbert G Mik, Leonardo Bocchi, Klazina Kooiman, Nico de Jong, Can Ince
OBJECTIVES: We developed quantitative methods to analyze microbubble kinetics based on renal contrast-enhanced ultrasound imaging combined with measurements of sublingual microcirculation on a fixed area to quantify early microvascular alterations in sepsis-induced acute kidney injury. DESIGN: Prospective controlled animal experiment study. SETTING: Hospital-affiliated animal research institution. SUBJECTS: Fifteen female pigs...
May 15, 2018: Critical Care Medicine
https://www.readbyqxmd.com/read/29766604/sodium-nitroglycerin-induces-middle-cerebral-artery-vasodilation-in-young-healthy-adults
#9
Jenna M Schulz, Baraa K Al-Khazraji, J Kevin Shoemaker
Recent evidence indicates that basal cerebral conduit vessels dilate with hypercapnia, with a nitric oxide (NO) mechanism explaining one way in which parenchymal cerebral arterioles dilate. However, whether NO affects basal cerebral artery dilation remains unknown. This study quantified the effect of an exogenous NO donor [sodium nitroglycerin (NTG); 0.4 mg sublingual spray] on the right middle cerebral artery (rMCA) cross-sectional area (CSA), blood velocity and overall blood flow. Measures of vessel CSA (7 Tesla magnetic resonance imaging) and MCA blood velocity (transcranial Doppler ultrasound) were made at baseline (BL), and following exogenous NTG or placebo (PLO) administration in young, healthy individuals (n = 10, 2 males, age range 20-23 years)...
May 15, 2018: Experimental Physiology
https://www.readbyqxmd.com/read/29765694/development-of-an-intravascular-ultrasound-elastography-based-on-a-dual-element-transducer
#10
Cho-Chiang Shih, Pei-Yu Chen, Teng Ma, Qifa Zhou, K Kirk Shung, Chih-Chung Huang
The ability to measure the elastic properties of plaques and vessels would be useful in clinical diagnoses, particularly for detecting a vulnerable plaque. This study demonstrates the feasibility of the combination of intravascular ultrasound (IVUS) and acoustic radiation force elasticity imaging for detecting the distribution of stiffness within atherosclerotic arteries ex vivo . A dual-frequency IVUS transducer with two elements was used to induce the propagation of the shear wave (by the 8.5 MHz pushing element) which could be simultaneously monitored by the 31 MHz imaging element...
April 2018: Royal Society Open Science
https://www.readbyqxmd.com/read/29764827/not-so-mass-effect-finding-of-a-remarkable-incidentaloma-in-a-teenager-with-neurofibromatosis
#11
Daniel John Keen, Hannah Norman-Bruce, Salah Mansy
A 13-year-old boy with neurofibromatosis type 1 presented to the emergency department twice in a fortnight with moderate intermittent abdominal pain, radiating to the back and associated with nausea and vomiting. He examined as a well child with a soft abdomen and minimal tenderness. A history of constipation was identified but he failed to respond to a trial of laxatives. Subsequent ultrasound abdomen demonstrated a large mass surrounding the porta hepatis. MRI further characterised a focal, non-aggressive lesion extending from his liver, encapsulating his pancreas, portal vessels and laterally displacing his spleen and left kidney...
May 14, 2018: BMJ Case Reports
https://www.readbyqxmd.com/read/29763966/quantitative-analysis-of-thyroid-tumors-vascularity-a-comparison-between-3-d-contrast-enhanced-ultrasound-and-3-d-power-doppler-on-benign-and-malignant-thyroid-nodules
#12
Cristina Caresio, Marco Caballo, Maurilio Deandrea, Roberto Garberoglio, Alberto Mormile, Ruth Rossetto, Paolo Limone, Filippo Molinari
PURPOSE: To perform a comparative quantitative analysis of Power Doppler ultrasound (PDUS) and Contrast-Enhancement ultrasound (CEUS) for the quantification of thyroid nodules vascularity patterns, with the goal of identifying biomarkers correlated to the malignancy of the nodule with both imaging techniques. METHODS: We propose a novel method to reconstruct the vascular architecture from 3-D PDUS and CEUS images of thyroid nodules, and to automatically extract seven quantitative features related to the morphology and distribution of vascular network...
May 15, 2018: Medical Physics
https://www.readbyqxmd.com/read/29761764/case-report-filaria-or-megasperm-a-cause-of-an-ultrasonographic-filarial-dance-sign
#13
J Brad Wiggers, Hyun-Jung Jang, Jay S Keystone
Bancroftian filariasis can cause genital abnormalities related to chronic inflammation and obstruction of the afferent lymphatic vessels, and may demonstrate a "filarial dance sign" on scrotal ultrasound with mobile echogenic particles observed. We present a patient with a positive "filarial dance sign," travel within Latin America and negative filarial serology.
May 14, 2018: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/29758453/estimation-and-tracking-of-ap-diameter-of-the-inferior-vena-cava-in-ultrasound-images-using-a-novel-active-circle-algorithm
#14
Ebrahim Karami, Mohamed S Shehata, Andrew Smith
Medical research suggests that the anterior-posterior (AP)-diameter of the inferior vena cava (IVC) and its associated temporal variation as imaged by bedside ultrasound is useful in guiding fluid resuscitation of the critically-ill patient. Unfortunately, indistinct edges and gaps in vessel walls are frequently present which impede accurate estimation of the IVC AP-diameter for both human operators and segmentation algorithms. The majority of research involving use of the IVC to guide fluid resuscitation involves manual measurement of the maximum and minimum AP-diameter as it varies over time...
May 4, 2018: Computers in Biology and Medicine
https://www.readbyqxmd.com/read/29756705/ultrasound-guided-vascular-cannulation-experience-in-critically-ill-pediatric-patients
#15
José M López Álvarez, Olivia Pérez Quevedo, Teresa Ramírez Lorenzo, José M Limiñana Cañal, Juan F Loro Ferrer
INTRODUCTION: Central vascular cannulation in children is a highly complex technique and poses many difficulties. Vascular ultrasound can make this procedure easier. OBJECTIVE: To describe the characteristics of ultrasound-guided vascular cannulation in critically-ill pediatric patients. POPULATION AND METHODS: Outcome measures prospectively recorded were vessels most frequently cannulated, their localization, the measurement of their diameter/depth, the success rate and complications developed, among others...
June 1, 2018: Archivos Argentinos de Pediatría
https://www.readbyqxmd.com/read/29753957/brainstem-blood-brain-barrier-disruption-using-focused-ultrasound-a-demonstration-of-feasibility-and-enhanced-doxorubicin-delivery
#16
Saira Alli, Carlyn A Figueiredo, Brian Golbourn, Nesrin Sabha, Megan Yijun Wu, Andrew Bondoc, Amanda Luck, Daniel Coluccia, Colin Maslink, Christian Smith, Heiko Wurdak, Kullervo Hynynen, Meaghan O'Reilly, James T Rutka
Magnetic Resonance Image-guided Focused Ultrasound (MRgFUS) has been used to achieve transient BBB opening without tissue injury. Delivery of a targeted ultrasonic wave causes an interaction between administered microbubbles and the capillary bed resulting in enhanced vessel permeability. The use of MRgFUS in the brainstem has not previously been shown but could provide value in the treatment of tumours such as Diffuse Intrinsic Pontine Glioma (DIPG) where the intact BBB has contributed to the limited success of chemotherapy...
May 10, 2018: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/29753425/-the-contribution-of-systematic-implementation-of-cardiovascular-explorations-for-the-detection-of-cardiac-sources-of-embolism-in-patients-with-stroke-about-230-patients
#17
A Hadi, L Bendriss, A Khatouri
OBJECTIVES: Ischemic stroke are estimated at 80% of all strokes. Embolism of cardiac origin accounts for around 20% of them. The aim of our study is to report the contribution of cardiovascular investigations performed as a routine during the evaluation of patients with ischemic stroke. PATIENTS AND METHODS: This is a retrospective study of ischemic stroke cases collated in Cardiology department of the military hospital of Marrakech between January 2010 and December 2014...
May 9, 2018: Annales de Cardiologie et D'angéiologie
https://www.readbyqxmd.com/read/29747829/local-low-shear-stress-and-endothelial-dysfunction-in-patients-with-nonobstructive-coronary-atherosclerosis
#18
Gerasimos Siasos, Jaskanwal D Sara, Marina Zaromytidou, Kyoung H Park, Ahmet Umit Coskun, Lilach O Lerman, Evangelos Oikonomou, Charles C Maynard, Dimitris Fotiadis, Kostas Stefanou, Michail Papafaklis, Lampros Michalis, Charles Feldman, Amir Lerman, Peter H Stone
BACKGROUND: Local hemodynamic factors are important determinants of atherosclerotic plaque development and progression. OBJECTIVES: The goal of this study was to determine the association between low endothelial shear stress (ESS) and microvascular and epicardial endothelial dysfunction in patients with early atherosclerosis. METHODS: Sixty-five patients (mean age 52 ± 11 years) with nonobstructive coronary atherosclerosis (luminal diameter stenosis <30%) were included...
May 15, 2018: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/29743525/design-characterization-and-in-vivo-performance-of-synthetic-2-mm-diameter-vessel-grafts-made-of-pva-gelatin-blends
#19
M Atlan, T Simon-Yarza, J M Ino, V Hunsinger, L Corté, P Ou, R Aid-Launais, M Chaouat, D Letourneur
Since the development of the first vascular grafts, fabrication of vessel replacements with diameters smaller than 6 mm remains a challenge. The present work aimed to develop PVA (poly (vinyl alcohol))-gelatin hybrids as tubes suitable for replacement of very small vessels and to evaluate their performance using a rat abdominal aorta interposition model. PVA-gelatin hybrid tubes with internal and external diameters of 1.4 mm and 1.8 mm, respectively, composed of 4 different gelatin ratios were prepared using a one-step strategy with both chemical and physical crosslinking...
May 9, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29742984/maternal-serum-endocan-concentration-in-pregnancies-complicated-by-intrauterine-growth-restriction
#20
Agata Szpera-Gozdziewicz, Katarzyna Kosicka, Tomasz Gozdziewicz, Mariola Krzyscin, Przemyslaw Wirstlein, Anna Siemiatkowska, Franciszek Glowka, Ewa Wender-Ozegowska, Grzegorz H Breborowicz
OBJECTIVES: Endocan plays a role in the development of vascular tissue in health and disease and is an indicator of endothelial cells activation and angiogenesis. Therefore, this study aimed to investigate the relationship between maternal endocan serum level and intrauterine growth restriction (IUGR) as well as ultrasound Doppler flow measurements indicating placental insufficiency. METHODS: This study included a group of women with IUGR (n = 37) and a group of healthy pregnant women (controls, n = 37)...
January 1, 2018: Reproductive Sciences
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