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Catheter van der walls

Sophinese Iskander-Rizk, Pieter Kruizinga, Antonius F W van der Steen, Gijs van Soest
Catheter-based radiofrequency ablation for atrial fibrillation has long-term success in 60-70% of cases. A better assessment of lesion quality, depth, and continuity could improve the procedure's outcome. We investigate here photoacoustic contrast between ablated and healthy atrial-wall tissue in vitro in wavelengths spanning from 410 nm to 1000 nm. We studied single- and multi-wavelength imaging of ablation lesions and we demonstrate that a two-wavelength technique yields precise detection of lesions, achieving a diagnostic accuracy of 97%...
March 1, 2018: Biomedical Optics Express
Stephanie Phillips, Jasmina Dedic-Hagan, d'Arcy Ferris Baxter, H Van der Wall, G L Falk
BACKGROUND: Excellent analgesia following oesophagectomy facilitates patient comfort, early extubation, physiotherapy and mobilisation, reduces post-operative complications and should enhance recovery. Thoracic epidural analgesia (TEA), the gold standard analgesic regimen for this procedure, is often associated with systemic hypotension treated with inotropes or fluid. This may compromise enhanced recovery and be complicated by anastomotic ischaemia or tissue oedema. METHODS: We report a novel analgesic regimen to reduce post-operative inotrope usage...
November 21, 2017: World Journal of Surgery
Diederik E van der Feen, Michel Weij, Annemieke Smit-van Oosten, Lysanne M Jorna, Quint A J Hagdorn, Beatrijs Bartelds, Rolf M F Berger
In this protocol, PAH is induced by combining a 60 mg/kg monocrotalin (MCT) injection with increased pulmonary blood flow through an aorto-caval shunt (MCT+Flow). The shunt is created by inserting an 18-G needle from the abdominal aorta into the adjacent caval vein. Increased pulmonary flow has been demonstrated as an essential trigger for a severe form of PAH with distinct phases of disease progression, characterized by early medial hypertrophy followed by neointimal lesions and the progressive occlusion of the small pulmonary vessels...
February 11, 2017: Journal of Visualized Experiments: JoVE
Bradley R Pieters, Elzbieta van der Steen-Banasik, Geert A Smits, Marisol De Brabandere, Alberto Bossi, Erik Van Limbergen
The standard treatment for muscle-invasive bladder cancer (MIBC) is a radical cystectomy with pelvic lymph node dissection with or without neoadjuvant chemotherapy. In selected cases a bladder sparing approach is possible, for example a limited surgical excision combined with external beam radiotherapy and brachytherapy. To perform brachytherapy flexible catheters have to be implanted in the bladder wall. The implantation is done either by the open retropubic approach or the endoscopic surgical approach. The largest experience for brachytherapy is with low-dose rate and pulsed-dose rate, although some short-term experience with high-dose rate is also reported...
March 2017: Radiotherapy and Oncology: Journal of the European Society for Therapeutic Radiology and Oncology
S J van der Wall, F A Klok, P L den Exter, D Barrios, R Morillo, S C Cannegieter, D Jimenez, M V Huisman
Essentials Low-molecular-weight heparin (LMWH) injections for venous thromboembolism (VTE) may be burdensome. Patients with active cancer and confirmed VTE were included to evaluate LMWH continuation. The cumulative incidence of discontinuation was 21% after a median period of 90 days. One out of five patients discontinued LMWH injections because of side effects. SUMMARY: Background Current guidelines recommend low-molecular-weight heparin (LMWH) monotherapy for 3-6 months as the first-line treatment for cancer-associated venous thromboembolism (VTE)...
January 2017: Journal of Thrombosis and Haemostasis: JTH
Jochem Bremmer, Tristan P C van Doormaal, Bon H Verweij, Albert van der Zwan, Cornelius A F Tulleken, Rudolf Verdaasdonk
The excimer laser assisted non-occlusive anastomosis (ELANA) technique is used to make anastomoses on intracerebral arteries. This end-to-side anastomosis is created without temporary occlusion of the recipient artery using a 308-nm excimer laser with a ring-shaped multi-fiber catheter to punch an opening in the arterial wall. Over 500 patients have received an ELANA bypass. However, the vessel wall perforation mechanism of the laser catheter is not known exactly and not 100 % successful. In this study, we aimed to understand the mechanism of ELANA vessel perforation using specialized imaging techniques to ultimately improve its effectiveness...
August 2016: Lasers in Medical Science
Tianshi Wang, Tom Pfeiffer, Evelyn Regar, Wolfgang Wieser, Heleen van Beusekom, Charles T Lancee, Geert Springeling, Ilona Krabbendam, Antonius F W van der Steen, Robert Huber, Gijs van Soest
Cardiac motion artifacts, non-uniform rotational distortion and undersampling affect the image quality and the diagnostic impact of intravascular optical coherence tomography (IV-OCT). In this study we demonstrate how these limitations of IV-OCT can be addressed by using an imaging system that we called "Heartbeat OCT", combining a fast Fourier Domain Mode Locked laser, fast pullback, and a micromotor actuated catheter, designed to examine a coronary vessel in less than one cardiac cycle. We acquired in vivo data sets of two coronary arteries in a porcine heart with both Heartbeat OCT, working at 2...
December 1, 2015: Biomedical Optics Express
Antonios Karanasos, Nicolas Van Mieghem, Martin W Bergmann, Eline Hartman, Jurgen Ligthart, Elco van der Heide, Christian-H Heeger, Mohamed Ouhlous, Felix Zijlstra, Evelyn Regar, Joost Daemen
BACKGROUND: Renal denervation is a new treatment considered for several possible indications. As new systems are introduced, the incidence of acute renal artery wall injury with relation to the denervation method is unknown. We investigated the acute repercussion of renal denervation on the renal arteries of patients treated with balloon-based and nonballoon-based denervation systems by quantitative angiography, intravascular ultrasound, and optical coherence tomography (OCT). METHODS AND RESULTS: Twenty-five patients (50 renal arteries) underwent bilateral renal denervation with 5 different systems, 3 of which balloon-based (Paradise [n=5], Oneshot [n=6], and Vessix V2 [n=5)]) and 2 nonballoon-based (Symplicity [n=6] and EnligHTN [n=3])...
July 2015: Circulation. Cardiovascular Interventions
Philippe J van Rosendael, Vasileios Kamperidis, Frank van der Kley, Spyridon Katsanos, Ibtihal Al Amri, Madelien V Regeer, Martin J Schalij, Arend de Weger, Nina Ajmone Marsan, Jeroen J Bax, Victoria Delgado
BACKGROUND: Atheroembolic renal disease, due to dislodgement of cholesterol crystals during maneuvering of a large catheter across the aorta and deployment of the transcatheter prosthesis within a calcified aortic valve, may be one of the pathophysiological mechanisms of acute kidney injury (AKI) complicating transcatheter aortic valve implantation (TAVI). OBJECTIVE: To investigate the association between the atherosclerotic burden and plaque characteristics of the aortic valve and thoracic aorta, evaluated with multidetector CT (MDCT), and the occurrence of AKI after TAVI...
March 2015: Journal of Cardiovascular Computed Tomography
Marjolein K Sechterberger, Peter H J van der Voort, Paul J Strasma, J Hans DeVries
BACKGROUND: The GluCath® intra-arterial continuous glucose monitoring (IA-CGM) system uses a novel quenched chemical fluorescence sensing mechanism to optically measure blood glucose when deployed in the radial artery. The aim of this study was to compare the accuracy of the IA-CGM and the FreeStyle Navigator® subcutaneous continuous glucose monitoring (SC-CGM) system with standard care. METHODS: After admission to the intensive care unit (ICU), the IA-CGM was inserted via a 20 gauge radial arterial study catheter and the SC-CGM was placed at the abdominal wall of postoperative cardiac surgery patients with an expected ICU length of stay > 24 hours...
May 2015: Journal of Diabetes Science and Technology
K van der Marel, M Gounis, R King, A Wakhloo, A Puri
INTRODUCTION: Intracranial placement of flow-diverter (FD) stents provides a safe and effective treatment for aneurysms.(1) However, long-term angiographic follow-up is indicated, since in-stent stenosis and late thrombosis as a consequence of poor vessel wall apposition increase the risks of stroke-related complications.(1,2) In addition to conventional angiography, high-resolution contrast-enhanced cone-beam CT (VasoCT) may provide improved three-dimensional visualization of stent deployment and apposition...
July 2014: Journal of Neurointerventional Surgery
W S J Malskat, M A L Stokbroekx, C W M van der Geld, T E C Nijsten, R R van den Bos
Endovenous thermal ablation (EVTA) techniques are very effective for the treatment of varicose veins, but their exact working mechanism is still not well documented. The lack of knowledge of mechanistic properties has led to a variety of EVTA protocols and a commercially driven dissemination of new or modified techniques without robust scientific evidence. The aim of this study is to compare temperature profiles of 980-and 1,470-nm endovenous laser ablation (EVLA), segmental radiofrequency ablation (RFA), and endovenous steam ablation (EVSA)...
March 2014: Lasers in Medical Science
Anneline S J M Te Riele, Cynthia A James, Binu Philips, Neda Rastegar, Aditya Bhonsale, Judith A Groeneweg, Brittney Murray, Crystal Tichnell, Daniel P Judge, Jeroen F Van Der Heijden, Maarten J M Cramer, Birgitta K Velthuis, David A Bluemke, Stefan L Zimmerman, Ihab R Kamel, Richard N W Hauer, Hugh Calkins, Harikrishna Tandri
INTRODUCTION: The traditional description of the Triangle of Dysplasia in Arrhythmogenic Right Ventricular Dysplasia/Cardiomyopathy (ARVD/C) predates genetic testing and excludes biventricular phenotypes. METHODS AND RESULTS: We analyzed Cardiac Magnetic Resonance (CMR) studies of 74 mutation-positive ARVD/C patients for regional abnormalities on a 5-segment RV and 17-segment LV model. The location of electroanatomic endo- and epicardial scar and site of successful VT ablation was recorded in 11 ARVD/C subjects...
December 2013: Journal of Cardiovascular Electrophysiology
Chris L de Korte, Hendrik H G Hansen, Anton F W van der Steen
Cardiovascular disease is a leading cause of death in the Western world. Therefore, detection and quantification of atherosclerotic disease is of paramount importance to monitor treatment and possible prevention of acute events. Vascular ultrasound is an excellent technique to assess the geometry of vessel walls and plaques. The high temporal as well as spatial resolution allows quantification of luminal area and plaque size and volume. While carotid arteries can be imaged non-invasively, scanning of coronary arteries requires invasive intravascular catheters...
August 6, 2011: Interface Focus
Guillermo J Tearney, Evelyn Regar, Takashi Akasaka, Tom Adriaenssens, Peter Barlis, Hiram G Bezerra, Brett Bouma, Nico Bruining, Jin-man Cho, Saqib Chowdhary, Marco A Costa, Ranil de Silva, Jouke Dijkstra, Carlo Di Mario, Darius Dudek, Darius Dudeck, Erling Falk, Erlin Falk, Marc D Feldman, Peter Fitzgerald, Hector M Garcia-Garcia, Hector Garcia, Nieves Gonzalo, Juan F Granada, Giulio Guagliumi, Niels R Holm, Yasuhiro Honda, Fumiaki Ikeno, Masanori Kawasaki, Janusz Kochman, Lukasz Koltowski, Takashi Kubo, Teruyoshi Kume, Hiroyuki Kyono, Cheung Chi Simon Lam, Guy Lamouche, David P Lee, Martin B Leon, Akiko Maehara, Olivia Manfrini, Gary S Mintz, Kyiouchi Mizuno, Marie-angéle Morel, Seemantini Nadkarni, Hiroyuki Okura, Hiromasa Otake, Arkadiusz Pietrasik, Francesco Prati, Lorenz Räber, Maria D Radu, Johannes Rieber, Maria Riga, Andrew Rollins, Mireille Rosenberg, Vasile Sirbu, Patrick W J C Serruys, Kenei Shimada, Toshiro Shinke, Junya Shite, Eliot Siegel, Shinjo Sonoda, Shinjo Sonada, Melissa Suter, Shigeho Takarada, Atsushi Tanaka, Mitsuyasu Terashima, Troels Thim, Thim Troels, Shiro Uemura, Giovanni J Ughi, Heleen M M van Beusekom, Antonius F W van der Steen, Gerrit-Anne van Es, Gerrit-Ann van Es, Gijs van Soest, Renu Virmani, Sergio Waxman, Neil J Weissman, Giora Weisz
OBJECTIVES: The purpose of this document is to make the output of the International Working Group for Intravascular Optical Coherence Tomography (IWG-IVOCT) Standardization and Validation available to medical and scientific communities, through a peer-reviewed publication, in the interest of improving the diagnosis and treatment of patients with atherosclerosis, including coronary artery disease. BACKGROUND: Intravascular optical coherence tomography (IVOCT) is a catheter-based modality that acquires images at a resolution of ~10 μm, enabling visualization of blood vessel wall microstructure in vivo at an unprecedented level of detail...
March 20, 2012: Journal of the American College of Cardiology
Ellen A ten Brinke, Robert J Klautz, Sven A Tulner, Harriette F Verwey, Jeroen J Bax, Victoria Delgado, Eduard R Holman, Martin J Schalij, Ernst E van der Wall, Jerry Braun, Michel I Versteegh, Robert A Dion, Paul Steendijk
BACKGROUND: Restrictive mitral annuloplasty (RMA) is increasingly applied to treat functional mitral regurgitation in heart failure patients. Previous studies indicated beneficial clinical effects with low recurrence rates. However, the underlying pathophysiology is complex and outcome in terms of left ventricular function is not well known. We investigated chronic effects of RMA on ventricular function in relation to clinical outcome. METHODS: Heart failure patients (n = 11) with severe mitral regurgitation scheduled for RMA were analyzed at baseline (presurgery) and midterm follow-up by invasive pressure-volume loops, using conductance catheters...
December 2010: Annals of Thoracic Surgery
Tristan P C van Doormaal, Albert van der Zwan, Ingeborg van der Tweel, Rudolf Verdaasdonk, Bon H Verweij, Luca Regli, Cornelius A F Tulleken
BACKGROUND AND OBJECTIVES: A key element in the Excimer Laser Assisted Non-occlusive Anastomosis (ELANA) technique is the retrieval of a disc ("flap") of artery wall from the anastomosis by the laser catheter tip. We assessed if the flap retrieval rate could be optimized. METHODS: We used a specially designed in vitro model using rabbit aortas. We tested three essential elements of the technique: (1) laser energy (10, 13, 15, or 18 mJ), (2) pressure on the catheter (0, 0...
July 2010: Lasers in Surgery and Medicine
Ellen A ten Brinke, Robert J Klautz, Sven A Tulner, Harriette F Verwey, Jeroen J Bax, Martin J Schalij, Ernst E van der Wall, Michel I Versteegh, Robert A Dion, Paul Steendijk
OBJECTIVES: Previous studies demonstrated beneficial short-term effects of surgical ventricular restoration on mechanical dyssynchrony and left ventricular function and improved midterm and long-term clinical parameters. However, long-term effects on systolic and diastolic left ventricular function are still largely unknown. METHODS: We studied 9 patients with ischemic dilated cardiomyopathy who underwent surgical ventricular restoration with additional restrictive mitral annuloplasty and/or coronary artery bypass grafting...
December 2010: Journal of Thoracic and Cardiovascular Surgery
Willem-Maarten P F Bosman, Tim J van der Steenhoven, Jan-Willem Hinnen, Bart L Kaptein, Alexander C de Vries, Hans L F Brom, Michael J Jacobs, Jaap F Hamming
PURPOSE: Aortic Customize is a new concept for endovascular aortic aneurysm repair in which a non polymerized elastomer is injected to fill the aneurysm sac around a balloon catheter. The aim of this in vitro study was to investigate the extent of aneurysm wall stress reduction by the presence of a noncompliant elastomer cuff. METHODS: A thin-walled latex aneurysm (inner radius sac 18 mm, inner radius neck 8 mm), equipped with 12 tantalum markers, was attached to an in vitro circulation model...
May 2010: Journal of Vascular Surgery
Ellen A Ten Brinke, Daniel Burkhoff, Robert J Klautz, Carsten Tschöpe, Martin J Schalij, Jeroen J Bax, Ernst E van der Wall, Robert A Dion, Paul Steendijk
AIMS: To test a method to predict the end-diastolic pressure-volume relationship (EDPVR) from a single beat in patients with heart failure. METHODS AND RESULTS: Patients (New York Heart Association class III-IV) scheduled for mitral annuloplasty (n=9) or ventricular restoration (n=10) and patients with normal left ventricular function undergoing coronary artery bypass grafting (n=12) were instrumented with pressure-conductance catheters to measure pressure-volume loops before and after surgery...
February 2010: Heart: Official Journal of the British Cardiac Society
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