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heart cryoablation

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https://www.readbyqxmd.com/read/29774073/polypyrrole-chitosan-conductive-biomaterial-synchronizes-cardiomyocyte-contraction-and-improves-myocardial-electrical-impulse-propagation
#1
Zhi Cui, Nathan C Ni, Jun Wu, Guo-Qing Du, Sheng He, Terrence M Yau, Richard D Weisel, Hsing-Wen Sung, Ren-Ke Li
Background: The post-myocardial infarction (MI) scar interrupts electrical impulse propagation and delays regional contraction, which contributes to ventricular dysfunction. We investigated the potential of an injectable conductive biomaterial to restore scar tissue conductivity and re-establish synchronous ventricular contraction. Methods: A conductive biomaterial was generated by conjugating conductive polypyrrole (PPY) onto chitosan (CHI) backbones. Trypan blue staining of neonatal rat cardiomyocytes (CMs) cultured on biomaterials was used to evaluate the biocompatibility of the conductive biomaterials...
2018: Theranostics
https://www.readbyqxmd.com/read/29770216/assessment-of-a-novel-cryoablation-device-for-the-endovascular-treatment-of-cardiac-tachyarrhythmias
#2
John M Baust, Anthony Robilotto, Peter Guerra, Kristi K Snyder, Robert G Van Buskirk, Marc Dubuc, John G Baust
Objectives: Cryoablation is an effective alternative treatment for cardiac arrhythmias offering shortened recovery and reduced side effects. As the use of cryoablation increases, the need for new devices and procedures has emerged. This has been driven by technological limitations including lengthy periods to generate a single lesion (3-5 min), uncertain transmurality, and differential efficacy. Furthermore, due to limited ablation capacity under high heat loads, cryo has had limited success in the treatment of ventricular arrhythmias...
2018: SAGE Open Medicine
https://www.readbyqxmd.com/read/29730348/epicardial-intraoperative-3-d-mapping-of-wolff-parkinson-white-in-a-child-with-ebstein-s-anomaly
#3
James C Perry, Andras Bratincsak, Suzanne Shepard, Matthew R Williams, Joseph Loslo, Raghav Murthy, John J Lamberti
Catheter ablation of arrhythmias in small patients has inherent significant risk due to patient, catheter, and lesion size. Heart block, perforation and coronary damage may occur. This report shows adaptation of a 3-D electroanatomic mapping system for intraoperative use in a small patient with Ebstein's anomaly undergoing Cone procedure and bidirectional Glenn. Use of this technique gave clear identification of the epicardial insertion points of two accessory pathways causing Wolff-Parkinson-White and resistant episodes of supraventricular tachycardia...
May 3, 2018: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/29721116/ventricular-tachycardia-storm-originating-from-interventricular-septum-successfully-treated-with-surgical-cryoablation-with-electroanatomic-and-electrophysiological-mapping-before-dual-valve-replacement
#4
Iwanari Kawamura, Seiji Fukamizu, Satoshi Miyazawa, Rintaro Hojo, Fusahiko Ito, Masazumi Watanabe, Mitsuhiro Nishizaki, Harumizu Sakurada, Masayasu Hiraoka
A 58-year-old man with dilated cardiomyopathy was admitted with heart failure. He had a history of two catheter ablation procedures for ventricular tachycardia (VT) originating from the intraventricular septum (IVS). Before dual valve replacement (DVR), he suffered a VT storm. An electrophysiological study revealed an extended low-voltage area at the IVS with the exit of the induced VT at the anterior side. Radiofrequency application was performed at the VT exit as a landmark for surgical cryoablation (SA)...
February 2018: Journal of Arrhythmia
https://www.readbyqxmd.com/read/29701425/analgesia-management-for-mitral-valve-repair-via-minithoracotomy-a-case-report
#5
Andreia Fernandes, Clara Gaio Lima, Nelson Paulo, Catarina Celestino, Ana Fonte Boa, Fátima Lima, Manuela Vieira
INTRODUCTION: Minimally invasive cardiac surgery (MICS), via minithoracotomy, is thought to be a fast track to extubation and recovery after surgery. Chronic pain, due to intercostal nerve injury, develops in up to 50% of postthoracotomy patients.A number of regional anaesthesia and analgesia techniques may be employed, and the anaesthesiologists play a key role in facilitating optimal outcomes after surgery. METHODS: We report a case of postoperative pain management with a local anesthetic infiltration for MICS...
July 2017: Revista Portuguesa de Cirurgia Cardio-torácica e Vascular
https://www.readbyqxmd.com/read/29618477/characteristics-of-ice-impedance-recorded-from-a-ring-electrode-placed-at-the-anterior-surface-of-the-cryoballoon-novel-approach-to-define-ice-formation-and-pulmonary-vein-isolation
#6
Boaz Avitall, Arthur Kalinski, G Stephen Kocheril, Ken S Lizama, Nicolas Coulombe, Timothy Laske
BACKGROUND: The success of cryoablation of the pulmonary vein isolation (PVI) is dependent on transmural and circumferential ice formation. We hypothesize that rising impedance recorded from a ring electrode placed 2 mm from the cryoballoon signifies ice formation covering the balloon surface and indicates ice expansion. The impedance level enables titration of the cryoapplication time to avoid extracardiac damage while ensuring PVI. METHODS AND RESULTS: In 12 canines, a total of 57 pulmonary veins were targeted for isolation...
April 2018: Circulation. Arrhythmia and Electrophysiology
https://www.readbyqxmd.com/read/29601309/anatomical-and-procedural-predictors-of-pulmonary-vein-stenosis-in-the-setting-of-second-generation-cryoballoon-ablation
#7
Hugo-Enrique Coutiño, Ken Takarada, Juan Sieira, Juan-Pablo Abugattas, Francesca Salghetti, Valentina De Regibus, Erwin Ströker, Pedro Brugada, Saverio Iacopino, Carlo de Asmundis, Gian-Battista Chierchia
AIMS: Pulmonary vein stenosis (PVS) is a well recognized complication as a consequence of pulmonary vein isolation. In the current study, we sought to analyze potential anatomical and intraprocedural predictors of PVS during second-generation cryoballoon ablation, particularly focusing on the impact of freeze duration and number of cryoapplications. METHODS: Fifty-four patients who underwent cryoballoon ablation for atrial fibrillation were included retrospectively in this study...
March 29, 2018: Journal of Cardiovascular Medicine
https://www.readbyqxmd.com/read/29482981/pediatric-catheter-ablation-characteristics-and-results-of-a-series-in-a-tertiary-referral-hospital
#8
Andrés Alonso-García, Felipe Atienza, Pablo Ávila, Clara Ugueto, Miriam Centeno, Reyes Álvarez, Tomás Datino, Esteban González-Torrecilla, Evaristo Castellanos, Gerard Loughlin, Constancio Medrano, Ángel Arenal, Francisco Fernández-Avilés
INTRODUCTION AND OBJECTIVES: Catheter ablation has become the treatment of choice in an increasing number of arrhythmias in children and adolescents. There is still limited evidence of its use at a national level in Spain. The aim was to describe the characteristics and results of a modern monocentric series form a referral tertiary care centre. METHODS: Retrospective register of invasive procedures between 2004 and 2016 performed in patients under 17 years and recorded clinical characteristic, ablation methodology and acute and chronic results of the procedure...
February 23, 2018: Revista Española de Cardiología
https://www.readbyqxmd.com/read/29365077/programmed-electrical-stimulation-guided-encircling-cryoablation-concomitant-to-surgical-ventricular-reconstruction-for-primary-prevention-of-ventricular-arrhythmias
#9
Carine F van Huls van Taxis, Adrianus P Wijnmaalen, Patrick Klein, Olaf M Dekkers, Jerry Braun, Harriette F Verwey, Martin J Schalij, Robert J Klautz, Katja Zeppenfeld
OBJECTIVES: Surgical ventricular reconstruction (SVR) is an effective treatment to improve left ventricular (LV) function in patients with ischaemic heart failure and an LV anterior-apical aneurysm. Ventricular arrhythmia (VA) is an important cause for morbidity and mortality in these patients. Therefore, encircling cryoablation targeting the VA substrate may be required. Programmed electrical stimulation (PES) can identify patients at risk for VA. The objective of this study was to evaluate the incidence and type of VA during long-term follow-up after PES-guided encircling cryoablation concomitant to SVR for primary prevention of VA...
January 22, 2018: European Journal of Cardio-thoracic Surgery
https://www.readbyqxmd.com/read/29211301/outcome-in-patients-with-left-common-pulmonary-vein-after-cryoablation-with-second-generation-cryoballoon
#10
Thomas Beiert, Pia C Lodde, Lutz P T Linneborn, Jessica Werner, Lisa Prinz, Florian Stöckigt, Markus Linhart, Lars Lickfett, Georg Nickenig, Jan W Schrickel, René P Andrié
BACKGROUND: Pulmonary vein isolation (PVI) has become a widely accepted therapy in patients suffering from symptomatic atrial fibrillation (AF). HYPOTHESIS: AF-free survival differs in patients with left common pulmonary vein (LCPV) after PVI with second-generation cryoballoon. METHODS: We included patients scheduled for first PVI for paroxysmal or persistent AF. Symptomatic and/or documented arrhythmia episodes (>30 seconds) were defined as AF recurrence, excluding a 3-month blanking period...
January 2018: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/29067915/pseudo-cryomapping-for-ablation-of-atrioventricular-nodal-reentry-tachycardia-a-single-center-north-american-experience
#11
Vaibhav K Moondra, Mark L Greenberg, Barbara R Gerling, Peter T Holzberger, Steven N Weindling, Rajbir S Sangha
BACKGROUND: Most literature for cryoablation of atrioventricular nodal reentry tachycardia (AVNRT) is based on -30 degree celsius cryomapping with 4 & 6 mm distal electrode catheters. The cryomapping mode is not available on the 6 mm cryocatheter in the United States. We describe a technique for 'pseudo' mapping at -80° using a 6 mm cryocatheter and report on short and long term outcomes. METHODS: A retrospective analysis of all index cases (n = 253) of cryoablation of AVNRT at a single North American institution during the period of 2003-2010 was performed...
July 2017: Indian Pacing and Electrophysiology Journal
https://www.readbyqxmd.com/read/28832094/initial-experience-of-catheter-ablation-for-cardiac-arrhythmias-in-children-and-adolescents-at-a-newly-built-ablation-centre
#12
Radosław Pietrzak, Piotr Lodziński, Tomasz Książczyk, Paweł Balsam, Monika Gawałko, Grzegorz Opolski, Bożena Werner
BACKGROUND: Catheter ablation (CA) therapy is the first-choice treatment in adults with heart rhythm disturbances. Arrhythmias in adults are mainly conditioned by coronary artery disease. Aetiology of arrhythmias in children is mostly associated with inherited heart disorders. According to the current guidelines, CA is widely used in children, indicating the need to make it more achievable in the paediatric population. AIM: To assess the efficacy and safety of CA in children with different types of arrhythmias on the initial learning curve at a newly built Ablation Centre in the Independent Paediatric Hospital of the Medical University of Warsaw, Poland...
2018: Kardiologia Polska
https://www.readbyqxmd.com/read/28818088/assessment-of-the-effect-of-left-atrial-cryoablation-enhanced-by-ganglionated-plexi-ablation-in-the-treatment-of-atrial-fibrillation-in-patients-undergoing-open-heart-surgery
#13
Jiří Bárta, Radim Brát
BACKGROUND: The aim of our study was to investigate, whether enhancement of left atrial cryoablation by ablation of the autonomic nervous system of left atrium leads to influencing the outcomes of surgical treatment of atrial fibrillation in patients with structural heart disease undergoing open-heart surgery. METHODS: The observed patient file consisted of 100 patients, who have undergone a combined open-heart surgery at our department between July 2012 and December 2014...
August 17, 2017: Journal of Cardiothoracic Surgery
https://www.readbyqxmd.com/read/28803547/cryoablation-of-cardiophrenic-angle-lymph-node-metastases-a-case-report
#14
Xiaomei Luo, Weibing He, Xinan Long, Gang Fang, Zhonghai Li, Rongrong Li, Kecheng Xu, Lizhi Niu
BACKGROUND: Cardiophrenic angle lymph node metastases are relatively rare. Surgical resection is the main treatment for cardiophrenic angle lymph node metastasis, but it is not always possible. CASE PRESENTATION: Here, we report our initial experience with cryoablation of a cardiophrenic angle lymph node metastasis from liver cancer. As the cardiophrenic angle lymph node metastasis was located close to the heart, about 200 mL of 0.9% saline was injected into the pericardium to separate the heart from the target area...
August 14, 2017: Journal of Medical Case Reports
https://www.readbyqxmd.com/read/28687669/atrioventricular-nodal-reentrant-tachycardia-in-patients-with-congenital-heart-disease-outcome-after-catheter-ablation
#15
MULTICENTER STUDY
John Papagiannis, Daniel Joseph Beissel, Ulrich Krause, Michel Cabrera, Marta Telishevska, Stephen Seslar, Christopher Johnsrude, Charles Anderson, Svjetlana Tisma-Dupanovic, Diana Connelly, Dimosthenis Avramidis, Christopher Carter, Laszlo Kornyei, Ian Law, Nicholas Von Bergen, Jan Janusek, Jennifer Silva, Eric Rosenthal, Mark Willcox, Peter Kubus, Gabriele Hessling, Thomas Paul
BACKGROUND: The relationship of atrioventricular nodal reentrant tachycardia to congenital heart disease (CHD) and the outcome of catheter ablation in this population have not been studied adequately. METHODS AND RESULTS: A multicenter retrospective study was performed on patients with CHD who had atrioventricular nodal reentrant tachycardia and were treated with catheter ablation. There were 109 patients (61 women), aged 22.1±13.4 years. The majority, 86 of 109 (79%), had CHD resulting in right heart pressure or volume overload...
July 2017: Circulation. Arrhythmia and Electrophysiology
https://www.readbyqxmd.com/read/28506919/novel-dyeless-and-fluoro-less-approach-to-cryoballoon-pulmonary-vein-occlusion-assessment
#16
Boaz Avitall, Arthur Kalinski, G Stephen Kocheril, Timothy G Laske, Nicolas Coulombe
BACKGROUND: Pulmonary vein (PV) occlusion is essential for PV isolation (PVI) using the cryoballoon. Currently occlusion is arbitrarily determined using fluoroscopy and contrast media. This study aimed to create an objective measure without utilizing excessive fluoroscopy and using no contrast media. OBJECTIVE: To ensure PV occlusion without fluoroscopy and contrast dye. METHODS: In 4 in vivo hearts 113 PV occlusions were tested with a 50% cold dye saline mix at 4°C...
May 13, 2017: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/28449531/ablation-of-atrial-fibrillation-single-shot-techniques-poised-to-dominate-rhythm-control-strategies-the-future-is-here
#17
EDITORIAL
Antonis S Manolis
Over the recent years, the advent of single-shot techniques, such as circular catheter and cryoballoon ablation, has ushered in a new era in the catheter ablation approach and rhythm control strategies of patients with atrial fibrillation (AF). These techniques make it easier to navigate the heart and have the potential to decrease the threshold for, expand the access to, and increase patient and physician acceptance of rhythm-control therapies, that may lead to reduction of the AF disease burden and its socioeconomic impact...
March 2017: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/28165525/cryoablation-for-treatment-of-cardiac-arrhythmias-results-of-the-european-heart-rhythm-association-survey
#18
Jian Chen, Radoslaw Lenarczyk, Serge Boveda, Roland Richard Tilz, Antonio Hernandez-Madrid, Pawel Ptaszynski, Janis Pudulis, Nikolaos Dagres
The purpose of this survey was to assess the current practice in Europe regarding cryoablation for treatment of different cardiac arrhythmias. The data are based on an electronic questionnaire sent to members of the European Heart Rhythm Association Research Network. Responses were received from 49 centres in 18 countries. The results show that cryoablation for supraventricular tachycardia in European centres is an alternative to radiofrequency ablation, which is in accordance with guidelines. There is reasonable consensus regarding clinical results and complications of cryoablation procedure...
February 1, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/28078383/effects-of-triple-cryoenergy-application-on-lesion-formation-and-coronary-arteries-in-the-developing-myocardium
#19
Ulrich Krause, Filipe D Abreu da Cunha, David Backhoff, Claudius Jacobshagen, Sophia Klehs, Heike E Schneider, Thomas Paul
To improve long-term outcome after cryoablation of substrates of supraventricular tachycardia, application of two and three consecutive freeze-thaw cycles has been performed. The effect of triple freeze-thaw cycles on lesion formation within developing myocardium and coronary arteries, however, has not been studied yet. In eight piglets (mean age 15 weeks, weight 15-20 kg), 30 cryolesions (three consecutive freeze-thaw cycles) were applied to the atrial aspect of both AV valve annuli (n = 18) as well as to ventricular myocardium below the valves (n = 12)...
April 2017: Pediatric Cardiology
https://www.readbyqxmd.com/read/27943134/cooling-dynamics-a-new-predictor-of-long-term-efficacy-of-atrioventricular-nodal-reentrant-tachycardia-cryoablation
#20
Mario Matta, Matteo Anselmino, Marco Scaglione, Marco Vitolo, Federico Ferraris, Paolo Di Donna, Domenico Caponi, Davide Castagno, Fiorenzo Gaita
PURPOSE: Catheter ablation of the slow pathway is the most effective treatment for atrioventricular nodal reentrant tachycardia (AVNRT). Cryoenergy, compared to radiofrequency, relates to lower heart block risk but higher incidence of AVNRT recurrences. The aims of this study are to confirm the safety and efficacy of AVNRT cryoablation and to identify predictors of long-term recurrences. METHODS: Among 241 patients undergoing AVNRT cryoablation, 239 (99.2%) experienced acute effective cryoablation of the slow pathway, and no procedure-related complications were reported...
April 2017: Journal of Interventional Cardiac Electrophysiology: An International Journal of Arrhythmias and Pacing
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