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Atrial Fibrillation and Radiation

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https://www.readbyqxmd.com/read/28901573/validation-of-a-novel-cartoseg%C3%A2-segmentation-module-software-for-contrast-enhanced-computed-tomography-guided-radiofrequency-ablation-in-patients-with-atrial-fibrillation
#1
EDITORIAL
Hasan Imanli, Shaun Bhatty, Jean Jeudy, Yousra Ghzally, Kiddy Ume, Rama Vunnam, Refael Itah, Mati Amit, John Duell, Vincent See, Stephen Shorofsky, Timm M Dickfeld
INTRODUCTION: Visualization of left atrial (LA) anatomy using image integration modules has been associated with decreased radiation exposure and improved procedural outcome when used for guidance of pulmonary vein isolation (PVI) in atrial fibrillation (AF) ablation. We evaluated the CARTOSEG™ CT Segmentation Module (Biosense Webster, Inc.) that offers a new CT-specific semi-automatic reconstruction of the atrial endocardium. METHODS: The CARTOSEG™ CT Segmentation Module software was assessed prospectively in 80 patients undergoing AF ablation...
September 13, 2017: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/28882497/pulmonary-vein-isolation-for-atrial-fibrillation-can-be-achieved-with-low-radiation-exposure
#2
Alex L Huang, Nadeem Mughal, Ferdinand Tabas, Natalie L Patterson, Wen Kai Wong, David Whalley, Logan Kanagaratnam
BACKGROUND: Atrial fibrillation is common and management by pharmacotherapy is limited by modest efficacy and significant toxicities. Pulmonary vein isolation (PVI) is a safe and effective alternative in select patients with atrial fibrillation. However, prolonged procedure time raises concerns of health risks from radiation exposure. This study aims to determine the significance of radiation exposure from PVI. METHODS: In this study, we retrospectively reviewed patient demographics, fluoroscopy time, entrance skin dose and dose area product in 80 cases of PVI, radiofrequency ablation for atrial flutter and diagnostic coronary angiogram performed in our institution...
August 8, 2017: Heart, Lung & Circulation
https://www.readbyqxmd.com/read/28752279/ablative-radiotherapy-as-a-noninvasive-alternative-to-catheter-ablation-for-cardiac-arrhythmias
#3
REVIEW
Paul C Zei, Scott Soltys
PURPOSE OF REVIEW: Stereotactic radioablation is a commonly utilized technology to noninvasively treat solid tumors with precision and efficacy. Using a robotic arm mounted delivery system, multiple low-dose ionizing radiation beams are delivered from multiple angles, concentrating ablative energy at the target tissue. Recently, this technology has been evaluated for treatment of cardiac arrhythmias. This review will present the basic underlying principles, proof-of-principle studies, and clinical experience with stereotactic arrhythmia radioablation...
September 2017: Current Cardiology Reports
https://www.readbyqxmd.com/read/28718039/a%C3%A2-decade-of-atrial-fibrillation-ablation-shifts-in-patient-characteristics-and-procedural-outcomes
#4
C Teunissen, N Clappers, R J Hassink, J F van der Heijden, F H Wittkampf, P Loh
BACKGROUND: Over the past decade, radiofrequency catheter ablation (RFCA) of atrial fibrillation (AF) has evolved into a frequently performed procedure. The aim of this study was to monitor changes in patient characteristics, procedural characteristics, outcomes and complications over the past 10 years. METHODS: All consecutive patients who underwent primary RFCA treatment of AF in the University Medical Center Utrecht from 2005-2015 were included. In all patients, the primary ablation strategy was pulmonary vein (PV) antrum isolation without additional substrate modification...
July 17, 2017: Netherlands Heart Journal
https://www.readbyqxmd.com/read/28706863/non-functional-tricuspid-valve-disease
#5
REVIEW
Dale S Adler
Only 75% of severe tricuspid regurgitation is classified as functional, or related primarily to pulmonary hypertension, right ventricular dysfunction, or a combination of both. Non-functional tricuspid regurgitation occurs when there is damage to the tricuspid leaflets, chordae, papillary muscles, or annulus, independent of right ventricular dysfunction or pulmonary hypertension. The entities that cause non-functional tricuspid regurgitation include rheumatic and myxomatous disease, acquired and genetic connective tissue disorders, endocarditis, sarcoid, pacing, RV biopsy, blunt trauma, radiation, carcinoid, ergot alkaloids, dopamine agonists, fenfluramine, cardiac tumors, atrial fibrillation, and congenital malformations...
May 2017: Annals of Cardiothoracic Surgery
https://www.readbyqxmd.com/read/28662717/nonenhanced-mr-angiography-of-the-pulmonary-arteries-using-single-shot-radial-quiescent-interval-slice-selective-qiss-a-technical-feasibility-study
#6
Robert R Edelman, Robert I Silvers, Kiran H Thakrar, Mark D Metzl, Jose Nazari, Shivraman Giri, Ioannis Koktzoglou
BACKGROUND: For evaluation of the pulmonary arteries in patients suspected of pulmonary embolism, CT angiography (CTA) is the first-line imaging test with contrast-enhanced MR angiography (CEMRA) a potential alternative. Disadvantages of CTA include exposure to ionizing radiation and an iodinated contrast agent, while CEMRA is sensitive to respiratory motion and requires a gadolinium-based contrast agent. The primary goal of our technical feasibility study was to evaluate pulmonary arterial conspicuity using breath-hold and free-breathing implementations of a recently-developed nonenhanced approach, single-shot radial quiescent-interval slice-selective (QISS) MRA...
June 30, 2017: Journal of Cardiovascular Magnetic Resonance
https://www.readbyqxmd.com/read/28639400/motion-estimation-for-cardiac-functional-analysis-using-two-x-ray-computed-tomography-scans
#7
George S K Fung, Luisa Ciuffo, Hiroshi Ashikaga, Katsuyuki Taguchi
PURPOSE: This work concerns computed tomography (CT)-based cardiac functional analysis (CFA) with a reduced radiation dose. As CT-CFA requires images over the entire heartbeat, the scans are often performed at 10-20% of the tube current settings that are typically used for coronary CT angiography. A large image noise then degrades the accuracy of motion estimation. Moreover, even if the scan was performed during the sinus rhythm, the cardiac motion observed in CT images may not be cyclic with patients with atrial fibrillation...
September 2017: Medical Physics
https://www.readbyqxmd.com/read/28636511/feasibility-of-low-dose-coronary-computed-tomographic-angiography-used-in-atrial-fibrillation-patients
#8
Chenglin Zhao, Mengxi Jiang, Jianxin Liu, Li Gao, Xiaoying Wang
OBJECTIVE: The diagnosis of coronary artery disease (CAD) in atrial fibrillation (AF) patients using coronary computed tomography angiography (CCTA) requires a large exposure dosage or repeated examinations. This study evaluates the feasibility of using low-dose CCTA in the double prospectively ECG-triggered high-pitch spiral acquisition mode (Double Flash Spiral mode). METHODS: Twenty-eight AF patients with suspected CAD were recruited. Double Flash Spiral mode (tube voltage 100 kVp) and iterative reconstruction was used for CCTA examination...
March 21, 2017: Acta Cardiologica
https://www.readbyqxmd.com/read/28631212/erratum-to-use-of-three-dimensional-computed-tomography-overlay-for-real-time-cryoballoon-ablation-in-atrial-fibrillation-reduces-radiation-dose-and-contrast-dye
#9
B Oude Velthuis, M M D Molenaar, H G Reinhart Dorman, J Y Stevenhagen, M F Scholten, J van der Palen, J M van Opstal
No abstract text is available yet for this article.
July 2017: Netherlands Heart Journal
https://www.readbyqxmd.com/read/28614264/extremely-low-frame-rate-digital-fluoroscopy-in-catheter-ablation-of-atrial-fibrillation-a-comparison-of-2-versus-4-frame-rate
#10
COMPARATIVE STUDY
Ji Hyun Lee, Jun Kim, Minsu Kim, Jongmin Hwang, You Mi Hwang, Joon-Won Kang, Gi-Byoung Nam, Kee-Joon Choi, You-Ho Kim
Despite the technological advance in 3-dimensional (3D) mapping, radiation exposure during catheter ablation of atrial fibrillation (AF) continues to be a major concern in both patients and physicians. Previous studies reported substantial radiation exposure (7369-8690 cGy cm) during AF catheter ablation with fluoroscopic settings of 7.5 frames per second (FPS) under 3D mapping system guidance. We evaluated the efficacy and safety of a low-frame-rate fluoroscopy protocol for catheter ablation for AF.Retrospective analysis of data on 133 patients who underwent AF catheter ablation with 3-D electro-anatomic mapping at our institute from January 2014 to May 2015 was performed...
June 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28607610/remote-magnetic-catheter-navigation-versus-conventional-ablation-in-atrial-fibrillation-ablation-fluoroscopy-reduction
#11
Paul Chun Yih Lim, Joseph Jia Hong Toh, Julian Kenrick Xing Yuan Loh, Edward Chun Yi Lee, Daniel Thuan Tee Chong, Boon Yew Tan, Kah Leng Ho, Chi Keong Ching, Wee Siong Teo
BACKGROUND: Percutaneous transcatheter radiofrequency ablation of atrial fibrillation with remote controlled magnetic navigation (RMN) has been shown to reduce radiation exposure to patients and physicians compared with conventional manual (MAN) ablation techniques. METHODS: Catheter ablation for atrial fibrillation was performed utilizing RMN in 214 consecutive patients and MAN ablation techniques in 229 patients. We compared the fluoroscopy and procedural times between RMN and MAN catheter ablation of atrial fibrillation...
June 2017: Journal of Arrhythmia
https://www.readbyqxmd.com/read/28590042/changes-in-arrhythmogenic-properties-and-five-year-prognosis-after-carbon-ion-radiotherapy-in-patients-with-mediastinum-cancer
#12
Mari Amino, Koichiro Yoshioka, Makiyoshi Shima, Tohru Okada, Mio Nakajima, Yoshiya Furusawa, Shigetaka Kanda, Sadaki Inokuchi, Teruhisa Tanabe, Yuji Ikari, Tadashi Kamada
INTRODUCTION: Carbon-ion irradiation of rabbit hearts has improved left ventricular conduction abnormalities through upregulation of gap junctions. However, to date, there has been no investigation on the effect of carbon-ion irradiation on electrophysiological properties in human. We investigated this effect in patients with mediastinum extra-cardiac cancer treated with carbon-ion radiotherapy that included irradiating the heart. METHODS AND RESULTS: In April-December 2009, eight patients were prospectively enrolled (including two male, aged 72...
June 7, 2017: Annals of Noninvasive Electrocardiology
https://www.readbyqxmd.com/read/28538401/atrial-fibrillation-was-changed-into-sinus-bradycardia-in-a-ros1-positive-advanced-lung-adenocarcinoma-patient-who-achieved-durable-response-to-crizotinib-a-case-report-and-literature-review
#13
REVIEW
Lan Liu, Jing Wu, Wei Zhao, Mei-Juan Huang
RATIONAL: The c-ros oncogene 1 receptor tyrosine kinase (ROS1)-rearrangements represent a new and rare genetic subtype of non-small-cell lung cancer. In recent years, the use of crizotinib in ROS1-rearranged lung cancer exhibits significant clinical efficacy. Crizotinib is generally well tolerated and the most frequent adverse events include visual disorders, gastrointestinal disturbances, cardiac, and endocrine abnormalities. From a cardiac perspective, crizotinib is associated with 2 main cardiac effects, QT interval prolongation and bradycardia...
May 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28513211/image-quality-of-low-radiation-dose-left-atrial-ct-using-filtered-back-projection-and-an-iterative-reconstruction-algorithm-intra-individual-comparison-in-unselected-patients-undergoing-pulmonary-vein-isolation
#14
Ute Lina Fahlenkamp, Ivan Diaz Ramirez, Moritz Wagner, Carsten Schwenke, Alexander Huppertz, Bernd Hamm, Alexander Lembcke
Background Computed tomography (CT) of the left atrium (LA) is performed prior to pulmonary vein isolation (PVI) to improve success of circumferential ablation for atrial fibrillation. The ablation procedure itself exposes patients to substantial radiation doses, therefore radiation dose reduction in pre-ablational imaging is of concern. Purpose To assess and compare diagnostic performance of low-radiation dose preprocedural CT in patients scheduled for PVI using two types of reconstruction algorithms. Material and Methods Forty-six patients (61 ± 10 years) scheduled for PVI were enrolled in this study irrespective of body-mass-index or cardiac rhythm at examination...
January 1, 2017: Acta Radiologica
https://www.readbyqxmd.com/read/28491756/radiation-associated-plasmacytoma-following-catheter-ablation-for-atrial-fibrillation
#15
Justin Chow, Theresa Trotter, Peter Duggan, Stephen B Wilton
No abstract text is available yet for this article.
January 2017: HeartRhythm Case Reports
https://www.readbyqxmd.com/read/28448411/image-quality-and-radiation-exposure-comparison-of-a-double-high-pitch-acquisition-for-coronary-computed-tomography-angiography-versus-standard-retrospective-spiral-acquisition-in-patients-with-atrial-fibrillation
#16
Carlos Eduardo Elias Dos Prazeres, Tiago Augusto Magalhães, Adriano Camargo de Castro Carneiro, Roberto Caldeira Cury, Valéria de Melo Moreira, Juliana Hiromi Silva Matsumoto Bello, Carlos Eduardo Rochitte
OBJECTIVE: The aim of this study was to compare image quality and radiation dose of coronary computed tomography (CT) angiography performed with dual-source CT scanner using 2 different protocols in patients with atrial fibrillation. METHODS: Forty-seven patients with AF underwent 2 different acquisition protocols: double high-pitch (DHP) spiral acquisition and retrospective spiral acquisition. The image quality was ranked according to a qualitative score by 2 experts: 1, no evident motion; 2, minimal motion not influencing coronary artery luminal evaluation; and 3, motion with impaired luminal evaluation...
April 26, 2017: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/28445682/atrial-fibrillation-diagnostic-accuracy-of-coronary-ct-angiography-performed-with-a-whole-heart-230-%C3%A2%C2%B5m-spatial-resolution-ct-scanner
#17
Daniele Andreini, Gianluca Pontone, Saima Mushtaq, Edoardo Conte, Marco Perchinunno, Marco Guglielmo, Valentina Volpato, Andrea Annoni, Andrea Baggiano, Alberto Formenti, Maria Elisabetta Mancini, Virginia Beltrama, Valentina Ditali, Alessandro Campari, Cesare Fiorentini, Antonio L Bartorelli, Mauro Pepi
Purpose To assess image quality, interpretability, diagnostic accuracy, and radiation exposure of a computed tomography (CT) scanner with 16-cm coverage and 230-µm spatial resolution at coronary artery evaluation in patients with atrial fibrillation (AF) by using invasive coronary angiography (ICA) as the reference method and to compare the results with those obtained in patients with sinus rhythm (SR). Materials and Methods Written informed consent and institutional ethics committee approval were obtained...
September 2017: Radiology
https://www.readbyqxmd.com/read/28398484/significant-reduction-of-radiation-exposure-in-cryoballoon-based-pulmonary-vein-isolation
#18
Bruno Reissmann, Tilman Maurer, Peter Wohlmuth, Matthias Krüger, Christian Heeger, Christine Lemes, Thomas Fink, Johannes Riedl, Francesco Santoro, Shibu Mathew, Christian Sohns, Karl-Heinz Kuck, Feifan Ouyang, Andreas Metzner
Aims: Procedure times and left atrial dwell times of cryoballoon (CB)-based ablation strategies for atrial fibrillation (AF) are shorter as compared to radiofrequency ablation, yet fluoroscopy times are longer and result in a higher radiation exposure. The objective of this study is to evaluate a modified fluoroscopy protocol aiming at reduction of radiation exposure in CB ablation. Methods: A total of 120 patients with symptomatic AF underwent pulmonary vein isolation (PVI) using the second generation CB and an ablation strategy considering the individual time-to-isolation...
April 7, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/28374072/outcomes-following-cryoballoon-ablation-for-atrial-fibrillation-guided-by-pressure-waveform-monitoring-without-the-routine-use-of-pulmonary-venography
#19
Akshit Sharma, Jashdeep Dhoot, Jingyan Wang, Philip Jones, Sanjaya Gupta, Alan P Wimmer
PURPOSE: Pressure waveform analysis has the potential for facilitated assessment of pulmonary vein occlusion during cryoballoon ablation for atrial fibrillation. Data on clinical outcomes using this method are lacking. We sought to validate through clinical outcomes the use of pressure waveform analysis as the primary method of determining pulmonary vein occlusion during cryoballoon ablation. METHODS: A study was performed of 122 consecutive patients with atrial fibrillation (85% paroxysmal) undergoing cryoballoon ablation from May 2014 through July 2015 at a single institution using pressure waveform analysis as the primary method of assessing pulmonary vein occlusion...
June 2017: Journal of Interventional Cardiac Electrophysiology: An International Journal of Arrhythmias and Pacing
https://www.readbyqxmd.com/read/28315567/a-practical-guide-for-building-a-highway-between-atria-during-transseptal-puncture-without-radiation
#20
Yuan Yuan, Deyong Long, Caihua Sang, Ling Tao, Jianzeng Dong, Changsheng Ma
OBJECTIVE: To investigate whether switching the ablation catheter between the right and left atria through transseptal puncture site can be accurately performed without fluoroscopy. METHODS: Forty patients with persistent atrial fibrillation (mean age, 60.2±7.4 years; 65% males) got "2C3L" approach were randomized in a 1:1 ratio to undergo either crossing interatrial septum guided by fluoroscopy (trackless group) or crossing septum guided by track image that was mapped by Carto3 system (track group)...
June 2017: Anatolian Journal of Cardiology
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