Read by QxMD icon Read

Catheter ablation

Enrico Franco, Mike Ristic, Marc Rea, Wladyslaw M W Gedroyc
PURPOSE: Percutaneous ablation under MRI-guidance allows treating otherwise inoperable liver tumors locally using a catheter probe. However, manually placing the probe is an error-prone and time consuming task that requires a considerable amount of training. The aim of this paper was to present a pneumatically actuated robotic instrument that can assist clinicians in MRI-guided percutaneous intervention of the liver and to assess its functionality in a clinical setting. The robot positions a needle-guide inside the MRI scanner bore and assists manual needle insertions outside the bore...
October 2016: Medical Physics
Aditya J Ullal, Daniel W Kaiser, Jun Fan, Susan Schmitt, Claire T Than, Wolfgang C Winkelmayer, Paul A Heidenreich, Jonathon P Piccini, Marco V Perez, Paul J Wang, Mintu P Turakhia
INTRODUCTION: Data regarding catheter ablation of atrial fibrillation (AF) in patients with chronic kidney disease (CKD) is limited. We therefore assessed the association of CKD with common safety and clinical outcomes in a nationwide sample of ablation recipients. METHODS: Using MarketScan(®) Commercial Claims and Medicare Supplemental Databases, we evaluated 30-day safety and 1-year clinical outcomes in patients who underwent a first AF ablation procedure between 2007-2011...
October 26, 2016: Journal of Cardiovascular Electrophysiology
Saurabh Kumar, Akira Fujii, Sunil Kapur, Jorge Romero, Nishaki K Mehta, Shinichi Tanigawa, Laurence M Epstein, Bruce A Koplan, Gregory F Michaud, Roy M John, William G Stevenson, Usha B Tedrow
AIMS: Catheter ablation can be lifesaving in ventricular tachycardia (VT) storm, but the underlying substrate in patients with storm is not well characterized. We sought to compare the clinical factors, substrate and outcomes differences in patients with sustained monomorphic VT who present for catheter ablation with VT storm versus those with a non-storm presentation. METHODS: Consecutive ischemic (ICM; n = 554) or non-ischemic cardiomyopathy patients (NICM; n = 369) with a storm vs...
October 26, 2016: Journal of Cardiovascular Electrophysiology
Pawel Kuklik, Benjamin Schäffer, Boris A Hoffmann, Anand N Ganesan, Doreen Schreiber, Julia M Moser, Ruken Ö Akbulak, Arian Sultan, Daniel Steven, Bart Maesen, Ulrich Schotten, Christian Meyer, Stephan Willems
BACKGROUND: Electrogram-based identification of the regions maintaining persistent Atrial Fibrillation (AF) is a subject of ongoing debate. Here, we explore the concept of local electrical dyssynchrony to identify AF drivers. METHODS AND RESULTS: Local electrical dyssynchrony was calculated using mean phase coherence. High-density epicardial mapping along with mathematical model were used to explore the link between local dyssynchrony and properties of wave conduction...
2016: PloS One
Ying-Chieh Liao, Jo-Nan Liao, Li-Wei Lo, Yenn-Jiang Lin, Shih-Lin Chang, Yu-Feng Hu, Tze-Fan Chao, Fa-Po Chung, Ta-Chuan Tuan, Abigail Louise D Te, Rohit Walia, Shinya Yamada, Chung-Hsing Lin, Chin-Yu Lin, Yao-Ting Chang, Suresh Allamsetty, Y U Wen-Chung, Jing-Long Huang, Tsu-Juey Wu, Shih-Ann Chen
INTRODUCTION: Although rare, some paroxysmal atrial fibrillations (AF) still progress despite radiofrequency (RF) ablation. In the study, we evaluated the long-term efficacy of RF ablation and the predictors of AF progression. METHODS: A total of 589 paroxysmal AF patients (404 men and 185 women; aged 54 ± 12 years) who received three-dimensional mapping and ablation were enrolled. Their clinical parameters and electrophysiological characteristics were collected...
October 25, 2016: Journal of Cardiovascular Electrophysiology
Jaroslav Meluzin, Zdenek Starek, Tomas Kulik, Jiri Jez, Frantisek Lehar, Josef Tomandl, Ladislav Dusek, Jiri Wolf, Pavel Leinveber, Miroslav Novak
BACKGROUND: Noninvasive diagnosis of exercise-induced elevation of left ventricular filling pressure is difficult and remains unsatisfactory. The aim of this study was to assess the accuracy of the ratio of early diastolic transmitral (E) to mitral annular (e') velocity and to determine new parameters or parameter combinations with the ability to predict exercise-induced left atrial pressure (LAP) elevation. METHODS AND RESULTS: Eighty patients with paroxysmal atrial fibrillation (AF) referred for catheter AF ablation underwent simultaneous exercise echocardiography and direct invasive LAP measurements, as well as a resting and postexercise biomarker analysis...
October 25, 2016: Echocardiography
Nilesh Mathuria
No abstract text is available yet for this article.
October 2016: Texas Heart Institute Journal
Martin Eisenberger, Alan Bulava, Josef Kautzner, Petr Neuzil, Ales Mokracek, Jiri Hanis, Ladislav Dusek
BACKGROUND: Atrial fibrillation is common in patients with structural heart disease who are undergoing cardiac surgery. Surgical CryoMaze has been shown to be an effective treatment in several trials, but success rates have varied considerably, between 47-95 %. The sequential hybrid approach, combining surgical CryoMaze followed by radiofrequency catheter ablation, can achieve high freedom from atrial arrhythmias, even when rigorous methods to detect arrhythmias after the procedure are used...
October 24, 2016: Trials
R-C Zhao, W Han, J Han, J Yu, J Guo, J-L Fu, Z Li, R-Z Zhao
OBJECTIVE: To study the efficacy and safety of radiofrequency catheter ablation (RFCA) in patients with different forms of atrial fibrillation. PATIENTS AND METHODS: By retrospective analysis, we summarize 720 cases, where patients diagnosed with atrial fibrillation in our hospital were treated with RFCA from February 2010 to October 2014. Among the cases, 425 were diagnosed with paroxysmal atrial fibrillation and 295 with non-paroxysmal atrial fibrillation (including persistent atrial fibrillation and permanent atrial fibrillation)...
October 2016: European Review for Medical and Pharmacological Sciences
Abhijeet B Shelke, Rajeev Menon, Anuj Kapadiya, Sachin Yalagudri, Daljeet Saggu, Sandeep Nair, C Narasimhan
OBJECTIVE: Alcohol septal ablation (ASA) is a therapeutic alternative to surgical myectomy in patients with hypertrophic obstructive cardiomyopathy (HOCM). However, the anatomical variability of the septal branch, risk of complete heart block, and late onset ventricular arrhythmias are limitations to its therapeutic usage. There is recent interest in the use of radiofrequency catheter ablation (RFCA) as a therapeutic option in HOCM. We aimed to assess the safety and efficacy of RFCA in the treatment of symptomatic HOCM...
September 2016: Indian Heart Journal
Yuki Kuroda, Kenji Minakata, Kazuhiro Yamazaki, Hisashi Sakaguchi, Kyokun Uehara, Ryuzo Sakata
No abstract text is available yet for this article.
November 2016: Annals of Thoracic Surgery
Anene Ukaigwe, Pragya Shrestha, Paras Karmacharya, Sarah K Hussain, Soraya Samii, Mario D Gonzalez, Deborah Wolbrette, Gerald V Naccarrelli
BACKGROUND: Apixaban is a Factor Xa inhibitor increasingly being used for stroke prevention in atrial fibrillation (AF). Although several studies have been done, the efficacy and safety of apixaban during the peri-procedural period of AF ablation remains unclear. We sought to systematically review pooled data from these various studies to evaluate thromboembolic and bleeding risks in patients undergoing catheter ablation for AF who are treated with apixaban (interrupted and uninterrupted)...
October 22, 2016: Journal of Interventional Cardiac Electrophysiology: An International Journal of Arrhythmias and Pacing
Amee M Bigelow, Brandon S Arnold, Gregory C Padrutt, John M Clark
In current practice, children with anatomically normal hearts routinely undergo fluoroscopy-free ablations. Infants and children with congenital heart disease (CHD) represent the most difficult population to perform catheter ablation without fluoroscopy. We report two neonatal patients with CHD in whom cardiac ablations were performed without fluoroscopy. The first infant had pulmonary atresia with intact ventricular septum with refractory supraventricular tachycardia, and the second infant presented with Ebstein's anomaly of the tricuspid valve along with persistent supraventricular tachycardia...
October 21, 2016: Cardiology in the Young
Stefan Georg Spitzer, László Károlyi, Carola Rämmler, Frank Scharfe, Thomas Weinmann, Mirko Zieschank, Anke Langbein
INTRODUCTION: A patient-tailored ablation approach focused on the elimination of both pulmonary vein triggers as well as substrate drivers may result in favourable outcomes with recurrent persistent AF patients. OBJECTIVE: We evaluated the long-term outcomes of rotor ablation combined with conventional pulmonary vein isolation (PVI) in patients with recurrent non-paroxysmal AF. METHODS: 58 consecutive patients underwent FIRM-guided rotor ablation followed by conventional PVI for the treatment of recurrent non-paroxysmal AF...
October 21, 2016: Journal of Cardiovascular Electrophysiology
Marek Sramko, Dan Wichterle, Josef Kautzner
This study evaluated hemodynamic feasibility and reproducibility of a new method for in vivo simulation of human atrial fibrillation (AF). The method was tested during sinus rhythm in 10 patients undergoing catheter ablation for AF. A simple electronic device was assembled that allowed triggering a cardiac stimulator by predefined series of RR intervals. Irregular RR interval sequences with a mean heart rate of 90/min and 130/min were obtained from ECG recordings of another patients with AF. Simultaneous atrioventricular pacing was delivered by catheters placed inside the coronary sinus and at the His bundle region...
2016: PloS One
Payam Safavi-Naeini, Dreema Zafar-Awan, Hongjian Zhu, Gerardo Zablah, Anand V Ganapathy, Abdi Rasekh, Mohammad Saeed, Joanna Esther Molina Razavi, Mehdi Razavi
INTRODUCTION: Current methods for measuring voltage during radiofrequency (RF) ablation (RFA) necessitate turning off the ablation catheter. If voltage could be accurately read without signal attenuation during RFA, turning off the catheter would be unnecessary, allowing continuous ablation. We evaluated the accuracy of the Thermocool SMARTTOUCH catheter for measuring voltage while RF traverses the catheter. METHODS AND RESULTS: We studied 26 patients undergoing RFA for arrhythmias...
October 20, 2016: Journal of Cardiovascular Electrophysiology
Artur Baszko, Wojciech Telec, Piotr Kałmucki, Piotr Iwachów, Karol Kochman, Radosław Szymański, Jan Kłopocki, Stefan Ożegowski, Andrzej Szyszka, Tomasz Siminiak
Bipolar radiofrequency (RF) ablation is effective in treatment of ventricular tachycardia originating from thick interventricular septum. The RF generator and CARTO system can be used to precisely and safely perform ablation. Standard ablation catheter can be used with indifferent ablation electrode connected to the electrode receptacle in RF generator with custom-made cable.
October 2016: Clinical Case Reports
Nobuyuki Murakoshi, Kazutaka Aonuma
Drug treatment and/or implantable cardioverter defibrillator (ICD) implantation are the most widely accepted first-line therapies for channelopathic patients who have recurrent syncope, sustained ventricular tachycardia (VT), or documented ventricular fibrillation (VF), or are survivors of cardiac arrest. In recent years, there have been significant advances in mapping techniques and ablation technology, coupled with better understanding of the mechanisms of ventricular tachyarrhythmia in channelopathies. Catheter ablation has provided important insights into the role of the Purkinje network and the right ventricular outflow tract in the initiation and perpetuation of VT/VF, and has evolved as a promising treatment modality for ventricular tachyarrhythmia even in channelopathies...
October 2016: Journal of Arrhythmia
Naokata Sumitomo
Catecholaminergic polymorphic ventricular tachycardia (CPVT) is induced by emotions or exercise in patients without organic heart disease and may be polymorphic or bidirectional in nature. The prognosis of CPVT is not good, and therefore prevention of sudden death is of utmost importance. Genetic variants of CPVT include RyR2, CASQ2, CALM2, TRD, and possibly KCNJ2 and ANK2 gene mutations. Hypotheses that suggest the causes of CPVT include weakened binding of FKBP12.6 and RyR2, a store overload-induced Ca(2+) release (SOICR), unzipping of intramolecular domain interactions in RyR2, and molecular and functional abnormalities caused by mutations in the CASQ2 gene...
October 2016: Journal of Arrhythmia
Ivo Roca, Nuria Rivas, Jaume Francisco, Jordi Perez, Gabriel Acosta, Gerard Oristrell, Maria Terricabres, David Garcia-Dorado, Angel Moya
BACKGROUND: Ablation in aortic cusps could be necessary in up to 15% of the patients, especially in para-Hisian atrial tachycardia and ventricular arrhythmias arising from outflow tracts. Risk of coronary damage has led to recommendation of systematic coronary angiography (CA) during the procedure. Other image tests as intravascular (ICE) or transesophageal echocardiography (TEE) have been proposed. Both methods have limitations: additional vascular access for ICE and needing for additional CA in some patients in case of TEE...
October 19, 2016: Journal of Cardiovascular Electrophysiology
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"