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https://www.readbyqxmd.com/read/28429537/preliminary-findings-on-the-safety-of-1-5-and-3-tesla-magnetic-resonance-imaging-in-cardiac-pacemaker-patients
#1
V F van Dijk, P P H M Delnoy, J J J Smit, R A Ramdat Misier, A Elvan, H W van Es, B J W M Rensing, G Raciti, L V A Boersma
INTRODUCTION: Modern pacemakers are designed to allow patients to undergo Magnetic Resonance Imaging(MRI) under a set of specific conditions. Aim of this study is to provide confirmatory evidence of safety and performance of a new pacing system (ImageReady™, Boston Scientific) in patients undergoing 1.5 and 3 Tesla(T) MRI. METHODS AND RESULTS: Two prospective, non-randomized, single-arm studies were designed to provide confirmatory data of no impact of MRI on device function, lead parameters and patient conditions in subjects implanted with the system undergoing a clinically non-indicated 1...
April 21, 2017: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/28409845/procedural-success-and-intra-hospital-outcome-related-to-left-atrial-appendage-morphology-in-patients-that-receive-an-interventional-left-atrial-appendage-closure
#2
Christian Fastner, Michael Behnes, Benjamin Sartorius, Annika Wenke, Ibrahim El-Battrawy, Uzair Ansari, Ishar-Singh Gill, Martin Borggrefe, Ibrahim Akin
BACKGROUND: The interventional left atrial appendage (LAA) closure represents an emerging alternative to oral anticoagulation for stroke prevention in certain atrial fibrillation patients. Preliminary results have suggested high procedural success rates and fewer peri-interventional complications; however, there persists an insufficient understanding of the role of many underlying confounding variables (e.g., anatomical characteristics). HYPOTHESIS: It was investigated whether varying LAA morphologies influence procedural success as well as in-hospital outcome...
April 13, 2017: Clinical Cardiology
https://www.readbyqxmd.com/read/28404541/making-air-pollution-visible-a-tool-for-promoting-environmental-health-literacy
#3
Ekaterina Galkina Cleary, Allison P Patton, Hsin-Ching Wu, Alan Xie, Joseph Stubblefield, William Mass, Georges Grinstein, Susan Koch-Weser, Doug Brugge, Carolyn Wong
BACKGROUND: Digital maps are instrumental in conveying information about environmental hazards geographically. For laypersons, computer-based maps can serve as tools to promote environmental health literacy about invisible traffic-related air pollution and ultrafine particles. Concentrations of these pollutants are higher near major roadways and increasingly linked to adverse health effects. Interactive computer maps provide visualizations that can allow users to build mental models of the spatial distribution of ultrafine particles in a community and learn about the risk of exposure in a geographic context...
April 12, 2017: JMIR Public Health and Surveillance
https://www.readbyqxmd.com/read/28390284/well-balanced-system-for-coronary-calcium-detection-and-volume-measurement-in-a-low-resolution-intravascular-ultrasound-videos
#4
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/28385356/the-promus-premier-everolimus-eluting-platinum-chromium-stent-with-durable-polymer-evaluated-in-a-real-world-all-comer-population-in-rotterdam-cardiology-hospital-the-p-search-registry
#5
Miguel E Lemmert, Nicolas M van Mieghem, Robert-Jan van Geuns, Roberto Diletti, Rutger J van Bommel, Ron T van Domburg, Peter P de Jaegere, Evelyn Regar, Felix Zijlstra, Eric Boersma, Joost Daemen
BACKGROUND: A new-generation everolimus eluting platinum-chromium stent (EePCS), offering improved radial strength, radiopacity and conformability compared to everolimus-eluting cobalt-chromium stents (EeCCS), was evaluated with regard to safety and efficacy in an all-comer cohort. METHODS: A total of 1000 consecutive all-comer patients (including acute coronary syndrome, multivessel disease, calcified lesions) treated with an EePCS (Promus Premier™, Boston Scientific, Natick, Massachusetts) from May 2013 to October 2014 were compared to 1000 consecutive patients treated with an EeCCS (Xience Prime™, Abbott Vascular, Santa Clara, California) from April 2012 to May 2013...
March 20, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28349045/safety-profile-of-liver-fibroscan-in-patients-with-cardiac-pacemakers-or-implantable-cardioverter-defibrillators
#6
Yin Chan, Stephanie Pranke, Farid Rashidi, Shravan Nosib, Lawrence Worobetz
Background. Emerging evidence suggests that nonalcoholic fatty liver disease (NAFLD) is associated with coronary artery diseases and arrhythmias. The FibroScan (Echosens, France), a widely available, noninvasive device, is able to detect liver fibrosis and steatosis within this patient population. However, the FibroScan is currently contraindicated in patients with cardiac pacemakers (PM) or implantable cardioverter-defibrillators (ICD). Objective. To determine the safety profile of FibroScan testing in patients with PM or ICD...
2017: Canadian Journal of Gastroenterology & Hepatology
https://www.readbyqxmd.com/read/28337482/efficacy-and-safety-of-novel-digital-single-operator-peroral-cholangioscopy-guided-laser-lithotripsy-for-complicated-biliary-stones
#7
John Ct Wong, Raymond Sy Tang, Anthony Yb Teoh, Joseph Jy Sung, James Yw Lau
Background/study aims Laser lithotripsy can effectively fragment complicated biliary stones, but current cholangioscopes are limited by fragility, restricted mobility or moderate visual resolution. The efficacy and safety of a new digital single-operator peroral cholangioscope to guide laser lithotripsy were evaluated. Patients and methods In this prospective single-center series, consecutive patients with complicated biliary stones, defined as impacted stones > 1.5 cm in size and wider than the more distal common bile duct, or stones that failed extraction by basket mechanical lithotripsy, underwent ERCP and SpyGlass DS peroral cholangioscope (Boston Scientific, Marlborough, United States)-guided laser lithotripsy...
January 2017: Endoscopy International Open
https://www.readbyqxmd.com/read/28296239/stent-placement-in-the-superficial-femoral-and-proximal-popliteal-arteries-with-the-innova-self-expanding-bare-metal-stent-system
#8
Richard J Powell, Michael R Jaff, Herman Schroë, Andrew Benko, Juan Diaz-Cartelle, Stefan Müller-Hülsbeck
OBJECTIVES: The SuperNOVA trial was designed to evaluate performance of the Innova Vascular Self-Expanding Stent System (Boston Scientific, Marlborough, MA) for treating lesions in the femoropopliteal arteries. METHODS: Patients with chronic lower limb peripheral artery disease (Rutherford category 2, 3, or 4) and atherosclerotic lesions in the native superficial femoral and/or proximal popliteal artery (lengths 30-190 mm) were enrolled in this single-arm, multinational study...
March 15, 2017: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/28283867/postoperative-neuroimaging-analysis-of-drt-deep-brain-stimulation-revision-surgery-for-complicated-essential-tremor
#9
Volker Arnd Coenen, Balint Varkuti, Yaroslav Parpaley, Sabine Skodda, Thomas Prokop, Horst Urbach, Meng Li, Peter Christoph Reinacher
BACKGROUND: We report a patient who received conventional bilateral deep brain stimulation of the ventral intermediate nucleus of thalamus (Vim) for the treatment of medication refractory essential tremor (ET). After initial beneficial effects, therapeutic efficacy was lost due to a loss of control of his proximal trunkal and extremity tremor. The patient received successful diffusion tensor magnetic resonance imaging fiber tractographic (DTI FT)-assisted DBS revision surgery targeting the dentato-rubro-thalamic tract (DRT) in the subthalamic region (STR)...
May 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/28268306/in-silico-pre-clinical-trials-for-implantable-cardioverter-defibrillators
#10
Zhihao Jiang, Houssam Abbas, Kuk Jin Jang, Marco Beccani, Jackson Liang, Sanjay Dixit, Rahul Mangharam
Regulatory authorities require that the safety and efficacy of a new high-risk medical device be proven in a Clinical Trial (CT), in which the effects of the device on a group of patients are compared to the effects of the current standard of care. Phase III trials can run for several years, cost millions of dollars, and expose patients to an unproven device. In this paper, we demonstrate how to use a large group of synthetic patients based on computer modeling to improve the planning of a CT so as to increase the chances of a successful trial for implantable cardioverter defibrillators (ICDs)...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28264591/lubriglide-sequential-ureteral-dilators-%C3%A2-a-safe-and-effective-method-of-ureteral-dilation
#11
Christopher Mitchell, Joseph Kuebker, Benjamin McCormick, Tracy Marien, S Duke Herrell, Nicole L Miller
INTRODUCTION: During ureteroscopy (URS), ureteral dilation may be required to increase the likelihood of accessing the ureter to complete the procedure. Thus, we sought to assess the safety and efficacy of using Lubriglide sequential ureteral dilators(®) (Boston Scientific) to promote primary URS, without need for prestenting. PATIENTS AND METHODS: Retrospective review was performed of a consecutive series of patients undergoing primary URS by a single surgeon (N...
April 4, 2017: Journal of Endourology
https://www.readbyqxmd.com/read/28258051/transcatheter-heart-valve-selection-and-permanent-pacemaker-implantation-in-patients-with-pre-existent-right-bundle-branch-block
#12
Lennart van Gils, Didier Tchetche, Thibault Lhermusier, Masieh Abawi, Nicolas Dumonteil, Ramón Rodriguez Olivares, Javier Molina-Martin de Nicolas, Pieter R Stella, Didier Carrié, Peter P De Jaegere, Nicolas M Van Mieghem
BACKGROUND: Right bundle branch block is an established predictor for new conduction disturbances and need for a permanent pacemaker (PPM) after transcatheter aortic valve replacement. The aim of the study was to evaluate the absolute rates of transcatheter aortic valve replacement related PPM implantations in patients with pre-existent right bundle branch block and categorize for different transcatheter heart valves. METHODS AND RESULTS: We pooled data on 306 transcatheter aortic valve replacement patients from 4 high-volume centers in Europe and selected those with right bundle branch block at baseline without a previously implanted PPM...
March 3, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/28258018/left-sided-varicocele-as-a-rare-presentation-of-may-thurner-syndrome
#13
J R Stern, V I Patel, D E Cafasso, N B Gentile, A J Meltzer
INTRODUCTION: May-Thurner syndrome (MTS), the clinical sequelae of left iliac vein compression between the right iliac artery and the spine, is an accepted cause of lower extremity edema and venous thromboembolism. It is more prevalent in younger women, and typically presents with left lower extremity symptoms. Atypical presentations such as right-sided symptoms, chronic pelvic pain, and even fatal venous rupture have been reported. Here we describe iliac vein compression presenting as a chronic left-sided testicular varicocele...
February 28, 2017: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/28256020/left-atrial-anatomy-and-patient-related-factors-associated-with-adverse-outcomes-with-the-watchman-device-a-real-world-experience
#14
Shishir Murarka, Mohamad Lazkani, Soundos Moualla, Divya Ratan Verma, Ashish Pershad
OBJECTIVE: This study sought to identify patient and left atrial morphology specific factors associated with early complications for left atrial appendage occlusion with the Watchman™ (Boston Scientific, Natick, MA) device. BACKGROUND: Oral anticoagulation (OAC) is recommended for patients with atrial fibrillation, however, long-term OAC compliance is poor. In randomized control trials, the Watchman™ device has demonstrated superiority over OAC with warfarin for all cause and cardiovascular mortality and hemorrhagic stroke...
April 2017: Journal of Interventional Cardiology
https://www.readbyqxmd.com/read/28237561/evolution-of-endoscopic-treatment-of-sleeve-gastrectomy-leaks-from-partially-covered-to-long-fully-covered-stents
#15
Fabio Garofalo, Maxime Noreau-Nguyen, Ronald Denis, Henri Atlas, Pierre Garneau, Radu Pescarus
BACKGROUND: Laparoscopic sleeve gastrectomy (SG) has become a widely accepted option in the treatment of morbid obesity. Gastric leaks after SG occur in .9%-2.2% of the patients, mostly at the gastroesophageal junction. The current treatment algorithm includes drainage, antibiotics, nutritional support, and endoluminal control. OBJECTIVES: Our hypothesis is that long, fully covered stents represent a safe, effective solution for SG leaks. SETTING: University hospital...
December 26, 2016: Surgery for Obesity and related Diseases: Official Journal of the American Society for Bariatric Surgery
https://www.readbyqxmd.com/read/28226465/in-silico-pre-clinical-trials-for-implantable-cardioverter-defibrillators
#16
Zhihao Jiang, Houssam Abbas, Kuk Jin Jang, Marco Beccani, Jackson Liang, Sanjay Dixit, Rahul Mangharam, Zhihao Jiang, Houssam Abbas, Kuk Jin Jang, Marco Beccani, Jackson Liang, Sanjay Dixit, Rahul Mangharam, Jackson Liang, Marco Beccani, Sanjay Dixit, Rahul Mangharam, Houssam Abbas, Zhihao Jiang, Kuk Jin Jang
Regulatory authorities require that the safety and efficacy of a new high-risk medical device be proven in a Clinical Trial (CT), in which the effects of the device on a group of patients are compared to the effects of the current standard of care. Phase III trials can run for several years, cost millions of dollars, and expose patients to an unproven device. In this paper, we demonstrate how to use a large group of synthetic patients based on computer modeling to improve the planning of a CT so as to increase the chances of a successful trial for implantable cardioverter defibrillators (ICDs)...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28223056/transcatheter-aortic-valve-in-valve-implantation-using-lotus-valve-for-failed%C3%A2-surgical-bioprostheses
#17
Fausto Castriota, Roberto Nerla, Antonio Micari, Caterina Cavazza, Francesco Bedogni, Luca Testa, Matteo Montorfano, Mauro Del Giglio, Alberto Cremonesi
BACKGROUND: Patients with failed bioprostheses are an increasing population at high risk for redo surgery. Valve-in-valve transcatheter aortic valve implantation is a promising alternative but a limited number of first-generation devices have proven efficacy in all cases. METHODS: Patients with degenerated bioprostheses at high risk for redo surgery were included in the registry after being assigned to valve-in-valve intervention by a local heart team. Main basal and follow-up data (at 1 month and 6 months) of patients undergoing valve-in-valve transcatheter aortic valve implantation with the Lotus valve system (Boston Scientific, Natick, MA) in three high-volume Italian centers were entered in the registry...
February 18, 2017: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/28217223/long-term-reliability-of-sweet-tip-type-screw-in-leads
#18
Asuka Takano, Gaku Sekita, Minako Watanabe, Hiroshi Mukaida, Sayaka Komatsu, Haruna Tabuchi, Hidemori Hayashi, Takashi Tokano, Masataka Sumiyoshi, Yuji Nakazato, Hiroyuki Daida
BACKGROUND: Active fixation leads have provided stable atrial and ventricular pacing; however, long-term follow-up data have not been satisfactory. The purpose of this study was to investigate the long-term reliability of active fixation leads and their electrical characteristic stability. METHODS: A total of 1196 pacing leads were implanted in 830 patients consecutively between 2002 and 2013. In this retrospective study, we were able to trace 1092 leads in 750 patients to investigate the prognosis of implanted leads...
February 2017: Journal of Arrhythmia
https://www.readbyqxmd.com/read/28191713/tissue-characterization-and-phenotype-classification-in-patients-presenting-with-acute-myocardial-infarction-insights-from-the-iwonder-study
#19
Cristiano F Souza, Akiko Maehara, Gary S Mintz, Mitsuaki Matsumura, Claudia M R Alves, Antonio Carlos Carvalho, Adriano Caixeta
OBJECTIVES: We sought to assess a new modality of radiofrequency intravascular ultrasound (IVUS) called iMAP-IVUS (Boston Scientific, Santa Clara, California) during the evaluation of patients presenting with high-risk acute coronary syndromes. BACKGROUND: There are limited data on plaque tissue characterization and phenotype classification using iMAP-IVUS. METHODS: In the iWonder study patients presenting with ST-elevation myocardial infarction (STEMI) or non-STEMI underwent three-vessel grayscale IVUS and iMAP-IVUS tissue characterization prior to percutaneous intervention...
February 13, 2017: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/28153614/internal-maxillary-artery-preoperative-embolization-using-nbca-and-pushable-coils-for-temporomandibular-joint-ankylosis-surgery-technical-note
#20
Yazan J Alderazi, Darshan Shastri, John Wessel, Melvin Mathew, Tareq Kass-Hout, Shahid R Aziz, Charles J Prestigiacomo, Chirag D Gandhi
INTRODUCTION: Temporomandibular joint (TMJ) ankylosis causes disability through impaired digestion, mastication, speech and appearance. Surgical treatment increases range of motion with resultant functional improvement. However, substantial perioperative blood loss can occur, up to three liters, if the internal maxillary artery (IMAX) is injured as it traverses the ankylotic mass. Achieving hemostasis is difficult due to limited proximal IMAX access and poor visualization. Our aim is to investigate the technical feasibility and preliminary safety of preoperative IMAX embolization in patients undergoing TMJ ankylosis surgery...
January 30, 2017: World Neurosurgery
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