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Intravascular ultrasound

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https://www.readbyqxmd.com/read/28444433/boundaries-of-the-thoracic-paravertebral-space-potential-risks-and-benefits-of-the-thoracic-paravertebral-block-from-an-anatomical-perspective
#1
Esther A C Bouman, Judith M Sieben, Andrea J R Balthasar, Elbert A Joosten, Hans-Fritz Gramke, Maarten van Kleef, Arno Lataster
PURPOSE: Thoracic paravertebral block (TPVB) may be an alternative to thoracic epidural analgesia. A detailed knowledge of the anatomy of the TPV-space (TPVS), content and adnexa is essential in understanding the clinical consequences of TPVB. The exploration of the posterior TPVS accessibility in this study allows (1) determination of the anatomical boundaries, content and adnexa, (2) description of an ultrasound-guided spread of low and high viscous liquid. METHODS: In two formalin-fixed specimens, stratification of the several layers and the 3D-architecture of the TPVS were dissected, observed and photographed...
April 25, 2017: Surgical and Radiologic Anatomy: SRA
https://www.readbyqxmd.com/read/28441172/intravascular-ultrasound-and-outcomes-after-drug-eluting-stent-implantation
#2
Gary S Mintz
There have been nine published randomized trials and 30 registry studies comparing intravascular ultrasound (IVUS)-guided drug-eluting stent implantation versus conventional angiographic guidance. These trials and registries have been evaluated and summarized in (i) eight meta-analyses that included from nine to 18 registries and from one to seven randomized trials and (ii) four meta-analyses that included from three to eight randomized trials. Although with one exception no two meta-analyses have included the same trials or studies, in each meta-analysis, IVUS guidance was associated with a reduction in major adverse cardiac events as well as secondary hard endpoints of death (primarily cardiovascular mortality), myocardial infarction, and stent thrombosis, especially in randomized trial meta-analyses...
June 2017: Coronary Artery Disease
https://www.readbyqxmd.com/read/28440041/ultrasound-assisted-versus-conventional-catheter-directed-thrombolysis-for-acute-ilio-femoral-deep-vein-thrombosis-one-year-follow-up-data-of-a-randomized-controlled-trial
#3
Rolf P Engelberger, Anna Stuck, David Spirk, Torsten Willenberg, Axel Haine, Daniel Périard, Iris Baumgartner, Nils Kucher
BACKGROUND: In patients with acute ilio-femoral deep vein thrombosis (IFDVT), catheter-directed thrombolysis (CDT) aims to prevent the post-thrombotic syndrome (PTS). Adding intravascular high-frequency, low-power ultrasound energy to CDT does not seem to improve the immediate thrombolysis results but its impact on clinical outcomes at 12 months is not known. PATIENTS/METHODS: In this randomized-controlled trial, 48 patients (mean age 50±21 years, 52% women) with acute IFDVT were randomized to conventional CDT (n=24) or ultrasound-assisted CDT (USAT; n=24)...
April 25, 2017: Journal of Thrombosis and Haemostasis: JTH
https://www.readbyqxmd.com/read/28435502/inferior-vena-cava-measurement-with-ultrasound-what-is-the-best-view-and-best-mode
#4
Nathan M Finnerty, Ashish R Panchal, Creagh Boulger, Amar Vira, Jason J Bischof, Christopher Amick, David P Way, David P Bahner
INTRODUCTION: Intravascular volume status is an important clinical consideration in the management of the critically ill. Point-of-care ultrasonography (POCUS) has gained popularity as a non-invasive means of intravascular volume assessment via examination of the inferior vena cava (IVC). However, there are limited data comparing different acquisition techniques for IVC measurement by POCUS. The goal of this evaluation was to determine the reliability of three IVC acquisition techniques for volume assessment: sub-xiphoid transabdominal long axis (LA), transabdominal short axis (SA), and right lateral transabdominal coronal long axis (CLA) (aka "rescue view")...
April 2017: Western Journal of Emergency Medicine
https://www.readbyqxmd.com/read/28427600/carotid-artery-stenting-investigation-of-plaque-protrusion-incidence-and-prognosis
#5
Masashi Kotsugi, Katsutoshi Takayama, Kaoru Myouchin, Takeshi Wada, Ichiro Nakagawa, Hiroyuki Nakagawa, Toshiaki Taoka, Shinichiro Kurokawa, Hiroyuki Nakase, Kimihiko Kichikawa
OBJECTIVES: This study sought to clarify the incidence and prognosis of PP in carotid artery stenting (CAS). BACKGROUND: Projections thought to be plaque may be observed inside the stent on angiography or intravascular ultrasound (IVUS) during CAS. Known as plaque protrusion (PP), the incidence and prognosis of this complication are unclear. METHODS: A total of 354 consecutive carotid atherosclerotic stenoses in 328 patients (285 men, 43 women; age range 51 to 97 years [mean age 73...
April 24, 2017: JACC. Cardiovascular Interventions
https://www.readbyqxmd.com/read/28413112/the-effect-of-negative-remodeling-on-fractional-flow-reserve-after-cardiac-transplantation
#6
William F Fearon, Robert Felix, Atsushi Hirohata, Ryota Sakurai, Powell O Jose, Masao Yamasaki, Mamoo Nakamura, Peter J Fitzgerald, Hannah A Valantine, Paul G Yock, Alan C Yeung
BACKGROUND: Negative remodeling is a common occurrence early after cardiac transplantation. Its impact on the development of myocardial ischemia is not well documented. The aim of this study is to investigate the impact of negative remodeling on fractional flow reserve after cardiac transplantation. METHODS: Thirty-four cardiac transplant recipients underwent intravascular ultrasound (IVUS) and fractional flow reserve (FFR) assessment soon after transplantation and one year later...
April 8, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28411703/a-novel-duplex-finding-of-superficial-epigastric-vein-flow-reversal-to-diagnose-iliocaval-occlusion
#7
Raghu Kolluri, Brian Fowler, Gary Ansel, Mitchell Silver
OBJECTIVE: Although duplex ultrasound (DUS) imaging is the current gold standard in the diagnosis of femoropopliteal deep venous thrombosis, it is not an optimal diagnostic modality to diagnose iliocaval occlusion. Screening for iliocaval occlusion thus remains a challenge for clinicians because of the lack of a reliable noninvasive technique. This challenge results in most patients undergoing computed tomography venography or magnetic resonance venography or invasive venography and intravascular ultrasound imaging...
May 2017: Journal of Vascular Surgery. Venous and Lymphatic Disorders
https://www.readbyqxmd.com/read/28406801/ultrasound-guided-s1-transforaminal-epidural-injection-using-the-in-plane-approach-and-color-doppler-imaging
#8
Donghwi Park
Recently, several studies have investigated the effectiveness of the ultrasound-guided lumbosacral transforaminal epidural injection. However, the ultrasound-guided S1 transforaminal epidural injection using an out-of-plane approach, which was previously reported, may cause an intestinal injury or intravascular injection because the needle tip tends to be invisible in the out-of-plane approach. In this study, therefore, we report a new method of ultrasound-guided S1 transforaminal epidural injection using the in-plane approach and color Doppler...
April 13, 2017: American Journal of Physical Medicine & Rehabilitation
https://www.readbyqxmd.com/read/28398396/-bioresorbable-vascular-scaffolds-clinical-experience-of-the-emilia-romagna-region-italy
#9
Alberto Menozzi, Gianluca Calogero Campo, Vincenzo Guiducci, Gianni Dall'Ara, Andrea Santarelli, Paolo Sbarzaglia, Marco Balducelli, Paolo Magnavacchi, Fabio Sgura, Luciano Losi, Luigi Vignali, Gianni Casella, Luigi Steffanon, Fabio Tarantino, Francesco Saia
BACKGROUND: The bioresorbable vascular scaffold (BRS) technology constitutes the new revolution of the coronary artery disease interventional treatment. Currently, three distinct types of BRSs are available but only one, the Absorb BVS, was on the market in 2013 when the Regional Commission for Medical Devices and the Cardiology and Cardiac Surgery Commission of the Emilia-Romagna Region drew up a technical and scientific essay to provide guidance for the introduction of BRS in public and affiliated health facilities...
February 2017: Giornale Italiano di Cardiologia
https://www.readbyqxmd.com/read/28397443/an-evaluation-of-dual-source-computed-tomography-used-with-the-de-weert-classification-to-detect-vulnerable-plaque-using-ivus-virtual-histology-as-a-standard-of-reference
#10
Bartosz Dołęga-Kozierowski, Piotr Klimeczek, Michał Lis, Róża Krycińska, Anna Chrapusta, Urszula Zaleska-Dorobisz, Jerzy Garcarek, Wojciech Witkiewicz
BACKGROUND: One of the main risk factors for cerebral ischemic events is atherosclerotic disease of the internal carotid artery (ICA). Nowadays, increasing attention is being paid to the relationship between the morphological features of atherosclerotic plaque and the occurrence of stroke. Several studies have demonstrated that the presence of specific vulnerable plaque types, with a large lipid core and thin fibrous cap, can be used as an independent risk predictor of cerebral ischemic events...
January 2017: Advances in Clinical and Experimental Medicine: Official Organ Wroclaw Medical University
https://www.readbyqxmd.com/read/28395970/dynamic-contrast-enhanced-mri-detects-changes-in-vascular-transport-rate-constants-following-treatment-with-thermally-sensitive-liposomal-doxorubicin
#11
Brett Z Fite, Azadeh Kheirolomoom, Josquin L Foiret, Jai W Seo, Lisa M Mahakian, Elizabeth S Ingham, Sarah M Tam, Alexander D Borowsky, Fitz-Roy E Curry, Katherine W Ferrara
Temperature-sensitive liposomal formulations of chemotherapeutics, such as doxorubicin, can achieve locally high drug concentrations within a tumor and tumor vasculature while maintaining low systemic toxicity. Further, doxorubicin delivery by temperature-sensitive liposomes can reliably cure local cancer in mouse models. Histological sections of treated tumors have detected red cell extravasation within tumors treated with temperature-sensitive doxorubicin and ultrasound. We hypothesize that the local release of drug into the tumor vasculature and resulting high drug concentration can alter vascular transport rate constants along with having direct tumoricidal effects...
April 7, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/28390769/vascular-applications-of-contrast-enhanced-ultrasound-imaging
#12
REVIEW
Kunal S Mehta, Jake J Lee, Ashraf A Taha, Efthymios Avgerinos, Rabih A Chaer
OBJECTIVE: Contrast-enhanced ultrasound (CEUS) imaging is a powerful noninvasive modality offering numerous potential diagnostic and therapeutic applications in vascular medicine. CEUS imaging uses microbubble contrast agents composed of an encapsulating shell surrounding a gaseous core. These microbubbles act as nearly perfect intravascular reflectors of ultrasound energy and may be used to enhance the overall contrast and quality of ultrasound images. The purpose of this narrative review is to survey the current literature regarding CEUS imaging and discuss its diagnostic and therapeutic roles in current vascular and selected nonvascular applications...
April 5, 2017: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/28390284/well-balanced-system-for-coronary-calcium-detection-and-volume-measurement-in-a-low-resolution-intravascular-ultrasound-videos
#13
Sumit K Banchhor, Narendra D Londhe, Tadashi Araki, Luca Saba, Petia Radeva, John R Laird, Jasjit S Suri
BACKGROUND: Accurate and fast quantitative assessment of calcium volume is required during the planning of percutaneous coronary interventions procedures. Low resolution in intravascular ultrasound (IVUS) coronary videos poses a threat to calcium detection causing over-estimation in volume measurement. We introduce a correction block that counter-balances the bias introduced during the calcium detection process. METHOD: Nineteen patients image dataset (around 40,090 frames), IRB approved, were collected using 40MHz IVUS catheter (Atlantis® SR Pro, Boston Scientific®, pullback speed of 0...
March 30, 2017: Computers in Biology and Medicine
https://www.readbyqxmd.com/read/28389294/comparison-of-aspire-mechanical-thrombectomy-versus-angiojet-thrombectomy-system-in-a-porcine-iliac-vein-thrombosis-model
#14
Roy J Weinberg, Tamuru Okada, Aaron Chen, Walter Kim, Changyi Chen, Peter H Lin
PURPOSE: To compare the efficacy and safety profile of the AngioJet thrombectomy device and ASPIRE thrombectomy system in a porcine venous thrombosis model. MATERIALS AND METHODS: Twelve adult pigs underwent bilateral iliac venous thrombosis created by using a stent-graft thrombosis model, and subsequently underwent either AngioJet (n = 6) or ASPIRE mechanical thrombectomy (n = 6) one week later. Intravascular ultrasound (IVUS) was used to assess thrombectomy efficacy, and computed tomography was used to evaluate pulmonary embolism (PE)...
April 4, 2017: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/28386054/acute-myocardial-infarction-due-to-coronary-artery-embolism-in-a-22-year-old-woman-with-mitral-stenosis-with-atrial-fibrillation-under-warfarinization-successful-management-with-anticoagulation
#15
Santosh Kumar Sinha, Mukesh Jitendra Jha, Mahmadula Razi, Vikash Chaturvedi, Yatish Besthenahalli Erappa, Shravan Singh, Vikas Mishra, Dibbendhu Khanra, Karandeep Singh
BACKGROUND Coronary artery embolization is an exceedingly rare cause of myocardial infarction, but a few cases in association with prosthetic mechanical valves have been reported. We report a case of embolic myocardial infarction caused by a thrombus in the left atrium with deranged coagulation profile in a patient with critical mitral stenosis under warfarinization. CASE REPORT A 22-year-old woman was taken to the catheterization lab for early coronary intervention in lieu of non-ST elevation myocardial infarction...
April 7, 2017: American Journal of Case Reports
https://www.readbyqxmd.com/read/28385401/vascular-access-site-and-outcomes-among-26-807-chronic-total-coronary-occlusion-angioplasty-cases-from-the-british-cardiovascular-interventions-society-national-database
#16
Tim Kinnaird, Richard Anderson, Nick Ossei-Gerning, Sean Gallagher, Adrian Large, Julian Strange, Peter Ludman, Mark de Belder, James Nolan, David Hildick-Smith, Mamas Mamas
OBJECTIVES: The aim of this study was to assess, using a national percutaneous coronary intervention (PCI) database, access-site choice and outcomes after chronic total occlusion (CTO) PCI. BACKGROUND: Given the influence of access site on outcomes, the use of radial access in CTO PCI warrants further investigation. METHODS: Data were analyzed from the British Cardiovascular Intervention Society dataset of 26,807 elective CTO PCI procedures performed in England and Wales between 2006 and 2013...
April 10, 2017: JACC. Cardiovascular Interventions
https://www.readbyqxmd.com/read/28383307/the-thrombolytic-effect-of-diagnostic-ultrasound-induced-microbubble-cavitation-in-acute-carotid-thromboembolism
#17
Thomas R Porter, Feng Xie, John Lof, Jeffry Powers, Francois Vignon, William Shi, Matthew White
BACKGROUND: Acute ischemic stroke is often due to thromboembolism forming over ruptured atherosclerotic plaque in the carotid artery (CA). The presence of intraluminal CA thrombus is associated with a high risk of thromboembolic cerebral ischemic events. The cavitation induced by diagnostic ultrasound high mechanical index (MI) impulses applied locally during a commercially available intravenous microbubble infusion has dissolved intravascular thrombi, especially when using longer pulse durations...
April 5, 2017: Investigative Radiology
https://www.readbyqxmd.com/read/28373785/chronic-total-coronary-occlusion-recanalization-current-techniques-and-new-devices
#18
REVIEW
Jan-Erik Gülker, Lars Bansemir, Heinrich G Klues, Alexander Bufe
Percutaneous coronary intervention (PCI) of total chronic coronary occlusion (CTO) still remains a major challenge. The prevalence of a CTO has been reported to be up to 30% among patients with a clinical indication for coronary angiography. Progress has been made with further advanced interventional techniques and continuously sophisticated interventional tools. Nevertheless the number of interventions carried out to recanalize a CTO is less than 10% of all procedures. Benefits of a successful CTO recanalization include relief of angina pectoris and ischemia-related dyspnea, substantial improvement in left ventricular function and, avoidance of surgery treatment...
April 2017: Journal of the Saudi Heart Association
https://www.readbyqxmd.com/read/28372789/automatic-media-adventitia-ivus-image-segmentation-based-on-sparse-representation-framework-and-dynamic-directional-active-contour-model
#19
Fahimeh Sadat Zakeri, Seyed Kamaledin Setarehdan, Somayye Norouzi
Segmentation of the arterial wall boundaries from intravascular ultrasound images is an important image processing task in order to quantify arterial wall characteristics such as shape, area, thickness and eccentricity. Since manual segmentation of these boundaries is a laborious and time consuming procedure, many researchers attempted to develop (semi-) automatic segmentation techniques as a powerful tool for educational and clinical purposes in the past but as yet there is no any clinically approved method in the market...
March 25, 2017: Computers in Biology and Medicine
https://www.readbyqxmd.com/read/28366306/the-largpad-trial-phase-iia-evaluation-of-l-arginine-infusion-in-patients-with-peripheral-arterial-disease
#20
Vikram S Kashyap, Ryan O Lakin, Patricia Campos, Matthew Allemang, Ann Kim, Timur P Sarac, Alfred Hausladen, Jonathan S Stamler
OBJECTIVE: Endothelial function is improved by l-arginine (l-arg) supplementation in preclinical and clinical studies of mildly diseased vasculature; however, endothelial function and responsiveness to l-arg in severely diseased arteries is not known. Our objective was to evaluate the acute effects of catheter-directed l-arg delivery in patients with chronic lower extremity ischemia secondary to peripheral arterial disease. METHODS: The study enrolled 22 patients (45% male) with peripheral arterial disease (mean age, 62 years) requiring lower extremity angiography...
March 30, 2017: Journal of Vascular Surgery
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