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https://www.readbyqxmd.com/read/28318819/slow-pathway-radiofrequency-ablation-using-magnetic-navigation-a-description-of-technique-and-retrospective-case-analysis
#1
Abhishek Bhaskaran, Maha Albarri, Neil Ross, Sara Al Raisi, Rahul Samantha, Leonette Roode, Fazlur Nadri, Jeanette Ng, Stuart Thomas, Aravinda Thiagalingam, Pramesh Kovoor
BACKGROUND: The Magnetic Navigation System (MNS) catheter was shown to be stable in the presence of significant cardiac wall motion and delivered more effective lesions compared to manual control. This stability could potentially make AV junctional reentrant tachycardia (AVNRT) ablation safer. The aim of this study is to describe the method of mapping and ablation of AVNRT with MNS and 3-D electro-anatomical mapping system (CARTO, Biosense Webster, Diamond bar, CA, USA) anatomical mapping, with a view to improve the safety of ablation...
February 21, 2017: Heart, Lung & Circulation
https://www.readbyqxmd.com/read/28185078/-ablation-of-av-nodal-reentrant-tachycardia-via-combined-access-through-the-medial-cubital-and-axillary-vein
#2
Tobias Schreiber, Philipp Attanasio, Frank Heinzel, Burkert Pieske, Wilhelm Haverkamp, Martin Huemer
If a transfemoral approach for catheter ablation procedures of paroxysmal supraventricular tachycardias is impossible, other access sites have to be considered. We present the case of a 78-year-old woman with an inferior vena cava (IVC) filter with symptomatic episodes of an atrioventricular nodal reentrant tachycardia (AVNRT). We used a combined cubital and axillary vein approach. The tachycardia was successfully ablated within the timeframe needed for conventional ablation.
February 9, 2017: Herzschrittmachertherapie & Elektrophysiologie
https://www.readbyqxmd.com/read/28125405/av-nodal-reentrant-tachycardia-with-a-2-1-right-bundle-branch-block-missed-as-bidirectional-ventricular-tachycardia-in-the-first-superficial-evaluation
#3
Mohammad Ali Akbarzadeh, Isa Khaheshi, Mehdi Memaryan, Mohammad Parsa Mahjoob, Mohammadreza Naderian
A 95-year old woman was admitted to our emergency unit because of acute abdominal pain. After urgent surgery according to the acute abdomen, she was referred to intensive care unit (ICU) of the emergency unit as she was intubated. It was developed a run of new arrhythmia which was diagnosed by cardiology resident as bidirectional ventricular tachycardia due to beat to beat changing the axis of the QRS. However, a second and more precise evaluation of the abnormal ECG suggested a narrow supraventricular tachycardia, most probably AV nodal reentrant tachycardia with a 2:1 right bundle branch block...
January 25, 2017: Romanian Journal of Internal Medicine, Revue Roumaine de Médecine Interne
https://www.readbyqxmd.com/read/28091832/utility-and-safety-of-the-safesept%C3%A2-transseptal-guidewire-for-electrophysiology-studies-with-catheter-ablation-in-pediatric-and-congenital-heart-disease
#4
Joseph J Knadler, Jeffrey B Anderson, Ahmad S Chaouki, Richard J Czosek, Chad Connor, Timothy K Knilans, David S Spar
PURPOSE: The atrial transseptal procedure is used in catheter ablation of left-sided arrhythmias. Studies in adult patients have shown the SafeSept™ transseptal guidewire (SSTG) to be effective in atrial transseptal procedures. We analyzed our 5-year experience with SSTG use in pediatric and congenital heart disease patients undergoing catheter ablation. METHODS: This is a single-center retrospective analysis of patients undergoing catheter ablation from 2009 to 2014...
January 14, 2017: Journal of Interventional Cardiac Electrophysiology: An International Journal of Arrhythmias and Pacing
https://www.readbyqxmd.com/read/28077816/incidence-of-atrial-tachyarrhythmias-in-patients-with-early-repolarization-syndrome
#5
Ki Won Hwang, Gi-Byoung Nam, Junhee Han, Yong Giun Kim, Hyung Oh Choi, Jun Kim, Kee-Joon Choi, You-Ho Kim
Atrial tachyarrhythmias (ATAs) occur in a significant proportion of Brugada syndrome (BrS) patients and are often an important cause of inappropriate shocks. The aim of this retrospective study was to evaluate the incidence of ATAs and ATA-induced inappropriate shocks in early repolarization syndrome (ERS) patients as compared to BrS patients.We analyzed data from 20 consecutive patients who were diagnosed with ERS and compared them with patients diagnosed with BrS (n = 31). Clinical and ICD interrogation data were collected and analyzed for all events with ICD shocks...
February 7, 2017: International Heart Journal
https://www.readbyqxmd.com/read/27958616/the-effect-of-atrial-pacing-site-on-electrophysiological-properties-of-the-atrioventricular-junction-and-induction-of-atrioventricular-nodal-reentry-in-patients-with-typical-atrioventricular-nodal-reentrant-tachycardia
#6
Radosław Marek Kiedrowicz, Jarosław Kaźmierczak, Maciej Wielusiński
BACKGROUND: Clinical studies in humans have shown the site of atrial stimulation to influence atrioventricular (AV) conduction times and refractory periods, the demonstration of dual atrioventricular nodal (AVN) pathways and induction of AVN reentry. These studies often found conflicting results. Moreover among enrolled patients the minority of them were found to have atrioventricular nodal reentrant tachycardia (AVNRT). The purpose of this study was to investigate the effect of the right and left atrial pacing on electrophysiological properties of the AV junction in the typical AVNRT population...
December 13, 2016: Kardiologia Polska
https://www.readbyqxmd.com/read/27943134/cooling-dynamics-a-new-predictor-of-long-term-efficacy-of-atrioventricular-nodal-reentrant-tachycardia-cryoablation
#7
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...
December 10, 2016: Journal of Interventional Cardiac Electrophysiology: An International Journal of Arrhythmias and Pacing
https://www.readbyqxmd.com/read/27920828/detection-of-sequential-activation-of-left-atrium-and-coronary-sinus-musculature-in-the-general-population
#8
Masaki Ota, Yoshiaki Kaneko, Tadashi Nakajima, Tadanobu Irie, Takafumi Iijima, Akihiro Saito, Masahiko Kurabayashi
BACKGROUND: The direction of impulse propagation across the coronary sinus (CS) musculature (CSM) is an important piece of the mechanistic puzzle underlying atrial tachyarrhythmias. We hypothesized that in the general population, the sequence of left atrial (LA) to CSM electrograms recorded in the CS reflects the direction of impulse propagation over the CSM. METHODS: We studied 19 patients with atrioventricular (AV) reentrant tachycardia (RT) utilizing a left-sided accessory pathway (AP) and 21 patients with typical counterclockwise atrial flutter (AFL)...
December 2016: Journal of Arrhythmia
https://www.readbyqxmd.com/read/27878364/-av-reentrant-tachycardia-and-wolff-parkinson-white-syndrome-diagnosis-and-treatment
#9
Frederik Voss, Lars Eckardt, Sonia Busch, Heidi L Estner, Daniel Steven, Philipp Sommer, Christian von Bary, Hans-Ruprecht Neuberger
The AV-reentrant tachycardia (AVRT) is a supraventricular tachycardia with an incidence of 1-3/1000. The pathophysiological basis is an accessory atrioventricular pathway (AP). Patients with AVRT typically present with palpitations, an on-off characteristic, anxiety, dyspnea, and polyuria. This type of tachycardia may often be terminated by vagal maneuvers. Although the clinical presentation of AVRT is quite similar to AV-nodal reentrant tachycardias, the correct diagnosis is often facilitated by analyzing a standard 12-lead ECG at normal heart rate showing ventricular preexcitation...
December 2016: Herzschrittmachertherapie & Elektrophysiologie
https://www.readbyqxmd.com/read/27775372/mathematical-model-of-the-atrioventricular-nodal-double-response-tachycardia-and-double-fire-pathology
#10
Beata Jackowska-Zduniak, Urszula Forys
A proposed model consisting of two coupled models (Hodgkin-Huxley and Yanagihara-Noma-Irisawa model) is considered as a description of the heart's action potential. System of ordinary differential equations is used to recreate pathological behaviour in the conducting heart's system such as double fire and the most common tachycardia: atrioventricular nodal reentrant tachycardia (AVNRT). Part of the population has an abnormal accessory pathways: fast and slow (Fujiki, 2008). These pathways in the atrioventricular node (AV node) are anatomical and functional contributions of supraventricular tachycardia...
December 1, 2016: Mathematical Biosciences and Engineering: MBE
https://www.readbyqxmd.com/read/27754882/catheter-ablation-of-atypical-atrioventricular-nodal-reentrant-tachycardia
#11
Demosthenes G Katritsis, Joseph E Marine, Fernando M Contreras, Akira Fujii, Rakesh Latchamsetty, Konstantinos C Siontis, George D Katritsis, Theodoros Zografos, Roy M John, Lawrence M Epstein, Gregory F Michaud, Elad Anter, Ali Sepahpour, Edward Rowland, Alfred E Buxton, Hugh Calkins, Fred Morady, William G Stevenson, Mark E Josephson
BACKGROUND: Because of its low prevalence, data on atypical atrioventricular nodal reentrant tachycardia (AVNRT) are scarce, and the optimal ablation method has not been established. Our study aimed at assessing the efficacy and safety of conventional slow pathway ablation, as applied for typical cases, in atypical AVNRT. METHODS: We studied 2079 patients with AVNRT subjected to slow pathway ablation. In 113 patients, mean age 48.5±18.1 years, 68 female, atypical AVNRT or coexistent atypical and typical AVNRT without other concomitant arrhythmia was diagnosed...
November 22, 2016: Circulation
https://www.readbyqxmd.com/read/27660579/catheter-ablation-to-treat-supraventricular-arrhythmia-in-children-and-adults-with-congenital-heart-disease-what-we-know-and-where-we-are-going
#12
REVIEW
Patricia E Thomas, Scott L Macicek
BACKGROUND: Catheter ablation has been used to manage supraventricular arrhythmia in children since 1990. This article reviews the history of catheter ablation used to treat arrhythmia in children and discusses new frontiers in the field. We also address ablation in adult patients with a history of congenital heart disease (CHD) that was diagnosed and initially treated in childhood. METHODS: We conducted an evidence-based literature review to gather available data on ablation for supraventricular tachycardia in children and adult patients with CHD...
2016: Ochsner Journal
https://www.readbyqxmd.com/read/27541305/optimal-slow-pathway-ablation-site-for-slow-fast-atrioventricular-nodal-reentrant-tachycardia-with-2-1-atrioventricular-conduction
#13
Jin Iwasawa, Shinsuke Miyazaki, Takamitsu Takagi, Hiroshi Taniguchi, Hiroaki Nakamura, Hitoshi Hachiya, Yoshito Iesaka
BACKGROUND: The exact circuit responsible for the atrioventricular (AV) nodal reentrant tachycardia (AVNRT) is still unknown. We evaluated the optimal slow pathway ablation area in patients with and without 2:1 AV conduction during the slow-fast AVNRT. METHODS: Among 207 consecutive patients with slow-fast AVNRT who underwent slow pathway ablation, 12 (5.8 %) patients who had 2:1 AV conduction during tachycardia (group A) were included. Fifty-nine patients without 2:1 AV conduction during tachycardia or a lower common pathway (group B) were included as a control group...
March 2017: Journal of Interventional Cardiac Electrophysiology: An International Journal of Arrhythmias and Pacing
https://www.readbyqxmd.com/read/27236028/catheter-ablation-of-supraventricular-tachyarrhythmia-after-extracardiac-fontan-surgery
#14
Jeremy P Moore, Kevin M Shannon, Frank A Fish, Stephen P Seslar, Jason M Garnreiter, Ulrich Krause, Ronn E Tanel, Andrew A Papez, Thomas A Pilcher, Seshadri Balaji
BACKGROUND: Extracardiac total cavopulmonary connection (E-TCPC) is widely performed for single ventricle palliation, yet there is little experience with catheter ablation in this population. OBJECTIVES: We hypothesized that atrial tachycardia substrates after primary E-TCPC would be similar to those in other forms of congenital heart disease and that catheter ablation could be performed effectively using a primarily transconduit approach. METHODS: Catheter ablation characteristics of patients with E-TCPC from 9 centers were collected...
September 2016: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/27221714/time-limited-cryomapping-during-tachycardia-improved-long-term-outcomes-for-cryoablation-of-avnrt
#15
Paula L S Eryazici, Mansour Razminia, Oliver D'Silva, Jaime R Chavez, Ferah D Ciftci, Marianne Turner, Theodore Wang, Terry A Zheutlin, Richard F Kehoe
PURPOSE: Cryothermal ablation (CTA) for atrioventricular nodal reentrant tachycardia (AVNRT) is considered safer than radiofrequency ablation (RFA) since it eliminates the risk of inadvertent AV block. However, it has not been widely adopted due to high late recurrence rate (LRR). In an effort to improve LRR, we evaluated a new approach to cryothermal mapping (CTM): "time to tachycardia termination" (TTT). METHODS: This single-center study had 88 consecutive patients who underwent CTA using TTT for AVNRT...
October 2016: Journal of Interventional Cardiac Electrophysiology: An International Journal of Arrhythmias and Pacing
https://www.readbyqxmd.com/read/27196507/long-postpacing-interval-after-entrainment-of-tachycardia-including-a-slow-conduction-zone-within-the-circuit
#16
Takahiko Kinjo, Shingo Sasaki, Masaomi Kimura, Shingen Owada, Daisuke Horiuchi, Kenichi Sasaki, Taihei Itoh, Yuji Ishida, Yoshihiro Shoji, Kimitaka Nishizaki, Yuichi Tsushima, Hirofumi Tomita, Ken Okumura
BACKGROUNDS: Postpacing interval (PPI) measured after entrainment pacing describes the distance between pacing site and reentrant circuit. However, the influential features to PPI remain to be elucidated. METHODS AND RESULTS: This study included 22 cases with slow/fast atrioventricular (AV) nodal reentrant tachycardia (AVNRT), 14 orthodromic AV reciprocating tachycardia (AVRT) using an accessary pathway, 22 typical atrial flutter (AFL), and 18 other macroreentrant atrial tachycardia (atypical AFL)...
August 2016: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/27050909/repetitive-nonreentrant-ventriculoatrial-synchrony-an-underrecognized-cause-of-pacemaker-related-arrhythmia
#17
Parikshit S Sharma, Karoly Kaszala, Alex Y Tan, Jayanthi N Koneru, Richard Shepard, Kenneth A Ellenbogen, Jose F Huizar
Similar to endless loop tachycardia (ELT), repetitive nonreentrant ventriculoatrial synchrony (RNRVAS) is a ventriculoatrial (VA) synchrony pacemaker-mediated arrhythmia. RNRVAS was first described in 1990 and can only occur in the presence of retrograde VA conduction and dual-chamber or cardiac resynchronization devices with tracking (P-synchronous ventricular pacing such as DDD, DDDR) or nontracking pacing modes that allow AV-sequential pacing (DDI, DDIR). RNRVAS is promoted by (1) high lower rate limit or any feature that allows rapid pacing, (2) long AV intervals, or (3) long postventricular atrial refractory period (PVARP)...
August 2016: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/26804568/catheter-ablation-for-atrioventricular-nodal-reentrant-tachycardia-in-patients-with-congenital-heart-disease
#18
Shailendra Upadhyay, Anne Marie Valente, John K Triedman, Edward P Walsh
BACKGROUND: Variability in atrioventricular (AV) node location in congenital heart disease (CHD) can make catheter ablation for atrioventricular nodal reentrant tachycardia (AVNRT) challenging. OBJECTIVE: The purpose of this study was to describe institutional technique and outcomes for slow pathway modification in a cohort with CHD. METHODS: The study consisted of a retrospective review of CHD patients who underwent study from 2001 to 2013 with a diagnosis of AVNRT...
June 2016: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/26766348/narrow-qrs-tachycardia-with-rr-alternans-and-2-1-va-relation
#19
Krishna Kumar Mohanan Nair, Narayanan Namboodiri, Anees Thajudeen, Nilesh Patel, Ajitkumar Valaparambil, Jaganmohan Tharakan
No abstract text is available yet for this article.
July 2016: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/26558907/-av-nodal-reentrant-tachycardia-diagnosis-and-therapy
#20
REVIEW
Christian von Bary, Lars Eckardt, Daniel Steven, Hans-Ruprecht Neuberger, Roland Richard Tilz, Hendrik Bonnemeier, Dierck Thomas, Thomas Deneke, Heidi L Estner, Malte Kuniss, Armin Luik, Philipp Sommer, Frederik Voss, Christian Meyer, D I Shin, Charalampos Kriatselis
The AV nodal reentrant tachycardia (AVNRT) is one of the most common arrhythmias encountered in clinical practice. It is characterized by a constant heart rate and an on/off phenomenon. The clinical symptoms may include palpitations, anxiety, polyuria, and dyspnea. Typically, tachycardia may be disrupted by vagal maneuvers in many patients. First-line treatment of symptomatic AVNRT is radiofrequency ablation. The present article deals with the characteristics, differential diagnosis and treatment of AVNRT in the EP lab...
December 2015: Herzschrittmachertherapie & Elektrophysiologie
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