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https://www.readbyqxmd.com/read/27910083/radiofrequency-catheter-ablation-of-accessory-pathways-in-patients-with-ebstein-s-anomaly-at-8-years-of-follow-up
#1
Michał Orczykowski, Paweł Derejko, Robert Bodalski, Piotr Urbanek, Joanna Zakrzewska-Koperska, Radosław Sierpiński, Katarzyna Kalin, Andrzej Hasiec, Grzegorz Warmiński, Maria Miszczak-Knecht, Katarzyna Bieganowska, Rafał Baranowski, Maria Bilińska, Elżbieta Biernacka, Piotr Hoffman, Łukasz Szumowski
BACKGROUND: Data regarding long-term follow-up of radiofrequency catheter ablation (RFCA) of accessory pathways (APs) in patients with Ebstein's anomaly (EA) are limited. The procedures are challenging due to multiple or wide APs. METHODS: Analysis was performed on clinical and periprocedural data of patients with EA referred to the centre in order to perform catheter ablation of accessory pathway (AP). The group consisted of 22 patients (female 40.9%, mean age 33...
December 2, 2016: Cardiology Journal
https://www.readbyqxmd.com/read/27909509/junctional-beats-during-cryo-ablation-of-the-slow-pathway-for-the-elimination-of-atrioventricular-nodal-reentrant-tachycardia
#2
Murat Sucu, Vedat Davutoglu, Esra Polat
The patient was a 39-year-old female with recurrent paroxysmal, regular narrow QRS complex tachycardia. Atrioventricular nodal reentrant tachycardia (AVNRT) was induced. The cryo-ablation attempts (-80°C, 240 second) were performed in the inferior-posterior triangle of Koch. We observed several junctional beats during cryo-ablation. After successful cryo-ablation, AVNRT induction was repeatedly checked during a waiting period of 30 minutes without recurrence. In our case we demonstrated that junctional beats can be observed during cryo-ablation...
June 2016: Journal of Atrial Fibrillation
https://www.readbyqxmd.com/read/27909485/supraventricular-tachycardia-with-irregular-ventricular-atrial-intervals-and-ventriculo-atrial-block
#3
Prof Dr Murat Sucu, Prof Dr Vedat Davutoglu, Dr Esra Polat
The patient was a 68-year-old female with recurrent paroxysmal, regular narrow QRS complex tachycardia. We observed complete VA conduction block, during tachycardia in our patient. A characteristic feature of our patient is the noticeable irregular atrial and ventricular rates. We considered that possible mechanism of this tachycardia was atrioventricular nodal reentrant tachycardia (AVNRT) with retrograde complete type block in the upper common pathway.
February 2016: Journal of Atrial Fibrillation
https://www.readbyqxmd.com/read/27784739/long-term-follow-up-after-catheter-ablation-of-atrioventricular-nodal-reentrant-tachycardia-in-children
#4
David Backhoff, Sophia Klehs, Matthias J Müller, Heike E Schneider, Thomas Kriebel, Thomas Paul, Ulrich Krause
BACKGROUND: Catheter ablation of the slow conducting pathway (SP) is treatment of choice for atrioventricular nodal reentrant tachycardia (AVNRT). Although there are abundant data on AVNRT ablation in adult patients, little is known about the long-term results ≥3 years after AVNRT ablation in pediatric patients. METHODS AND RESULTS: Follow-up data from 241 patients aged ≤18 years who had undergone successful AVNRT ablation were analyzed. Median age at ablation had been 12...
November 2016: Circulation. Arrhythmia and Electrophysiology
https://www.readbyqxmd.com/read/27775372/mathematical-model-of-the-atrioventricular-nodal-double-response-tachycardia-and-double-fire-pathology
#5
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
#6
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/27751374/diagnostic-accuracy-of-several-electrocardiographic-criteria-for-the-prediction-of-atrioventricular-nodal-reentrant-tachycardia
#7
Juliana Filgueiras Medeiros, Fábio Martins Nardo-Botelho, Lara Cristina Felix-Bernardes, Lucas Hollanda-Oliveira, Lucas Bassolli de Oliveira-Alves, Ênia Lúcia-Coutinho, Cristiano Dietrich, Adriano Caixeta, Jose Marconi Almeida-de-Sousa, Ântonio Carlos-Carvalho, Cláudio Cirenza, Ângelo Amato Vicenzo-de-Paola
BACKGROUND AND AIMS: Atrioventricular nodal reentrant tachycardia (AVNRT) is the most common form of paroxysmal supraventricular tachycardia (SVT) whose diagnosis can be strongly suspected based on the surface eletrocardiogram alone. The purpose of this study is to determine the diagnostic accuracy of several electrocardiographic (ECG) criteria for the prediction of AVNRT. METHODS: Between November 2010 and January 2014, a total of 256 patients who underwent electrophysiological testing (EP) with regular, paroxysmal and narrow QRS complex tachycardia were prospectively enrolled...
July 2016: Archives of Medical Research
https://www.readbyqxmd.com/read/27738058/cryoablation-of-atrioventricular-nodal-re-entrant-tachycardia-7-year-follow-up-in-515-patients-confirmed-safety-but-very-late-recurrences-occur
#8
Per Insulander, Hamid Bastani, Frieder Braunschweig, Nikola Drca, Göran Kennebäck, Jonas Schwieler, Jari Tapanainen, Mats Jensen-Urstad
AIMS: Cryoablation is an alternative method to radiofrequency ablation for treatment of atrioventricular nodal re-entrant tachycardia (AVNRT). This study investigates the long-term safety and efficacy of cryoablation in AVNRT. METHODS AND RESULTS: We studied 515 consecutive patients (317 women, mean age 50 years, range 13-89 years) undergoing a first cryoablation for AVNRT between 2003 and 2008. Ablations were performed with a 6-mm Freezor Xtra catheter. Six patients were acute failures; 494 out of 509 (97%) primarily successfully ablated patients were followed up for a mean of 7...
October 13, 2016: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/27716977/the-need-for-a-lengthier-cryolesion-can-predict-a-worse-outcome-in-3d-cryoablation-of-av-nodal-slow-pathway-in-children
#9
Fabrizio Drago, Mario Salvatore Russo, Irma Battipaglia, Gino Grifoni, Massimo Stefano Silvetti, Romolo Remoli, Vincenzo Pazzano, Fabio Anselmo Saputo, Michele Ciani
BACKGROUND: Transcatheter cryoablation is a well-established technique for the treatment of atrioventricular nodal reentry tachycardia (AVNRT) in children. Nevertheless, atrioventricular nodal slow-pathway conduction may recur after an acutely successful procedure. The aim of this study was to evaluate the long-term outcome of acutely successful AVNRT cryoablations in pediatric patients in case of focal cryolesion and in case of need for High-Density Linear Lesion (HDLL) cryoablation due to focal failure...
November 2016: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/27625076/disappearance-of-idiopathic-outflow-tract-premature-ventricular-contractions-after-catheter-ablation-of-overt-accessory-pathways
#10
Tamas Szili Torok, Lennart J DE Vries, Emin E Özcan, Can Hasdemir, Zsuzsanna Kis, Attila Kardos, Tamas Géczy, Istvan Kovacs, Imre Benedek, Erik Oosterwerff, Astrid A Hendriks, Muchtiar Khan, Sing-Chien Yap
BACKGROUND: Multiple mechanisms have been proposed for idiopathic premature ventricular contractions (PVCs) originating from the outflow tracts (OTs). Recent observations such as the coexistence of these arrhythmias with atrioventricular nodal reentrant tachycardias and the association between discrete prepotentials and successful ablation sites of ventricular arrhythmias (VAs) from the OTs suggest a common link. OBJECTIVE: In this case series we draw attention to a unique association between accessory pathways (APs) and idiopathic PVCs from the OTs, disappearing after AP ablation...
October 6, 2016: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/27624803/the-ventriculoatrial-relationship-after-atrial-overdrive-pacing-can-help-differentiate-atrioventricular-nodal-reentrant-tachycardia-from-junctional-tachycardia
#11
Lichun Wang, Jingzhou Jiang, Chen Su, Chong Feng, Yili Chen, Jun Liu, Jiangui He, Anli Tang
PURPOSE: Differentiating between atrioventricular nodal reentrant tachycardia (AVNRT) and non-reentrant junctional tachycardia (JT) is difficult but highly necessary for catheter ablation. The purpose of this study was to investigate whether the ventriculoatrial (VA) relationship after atrial overdrive pacing (AOP) could help to distinguish AVNRT from JT. METHODS: Thirty-eight AVNRT and 21 JT patients who were induced by infusion of isoproterenol after successful AVNRT ablation were paced through the high right atrium or coronary sinus until the ventricles were constantly captured...
December 2016: Journal of Interventional Cardiac Electrophysiology: An International Journal of Arrhythmias and Pacing
https://www.readbyqxmd.com/read/27617092/classification-electrophysiological-features-and-therapy-of-atrioventricular-nodal-reentrant-tachycardia
#12
Demosthenes G Katritsis, Mark E Josephson
Atrioventricular nodal reentrant tachycardia (AVNRT) should be classified as typical or atypical. The term 'fast-slow AVNRT' is rather misleading. Retrograde atrial activation during tachycardia should not be relied upon as a diagnostic criterion. Both typical and atypical atrioventricular nodal reentrant tachycardia are compatible with varying retrograde atrial activation patterns. Attempts at establishing the presence of a 'lower common pathway' are probably of no practical significance. When the diagnosis of AVNRT is established, ablation should be only directed towards the anatomic position of the slow pathway...
August 2016: Arrhythmia & Electrophysiology Review
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...
August 19, 2016: Journal of Interventional Cardiac Electrophysiology: An International Journal of Arrhythmias and Pacing
https://www.readbyqxmd.com/read/27488509/patient-s-age-rather-than-severity-of-the-arrhythmia-influences-the-cost-of-medical-treatment-of-atrioventricular-nodal-or-atrioventricular-reciprocating-tachycardia
#14
Michal M Farkowski, Mariusz Pytkowski, Aleksander Maciag, Dominik Golicki, Ilona Kowalik, Marcin Czech, Piotr Rucinski, Hanna Szwed
PURPOSE: Radiofrequency ablation (RFA) is considered the treatment of choice in cases of atrioventricular nodal reciprocating tachycardia (AVNRT) and atrioventricular reciprocating tachycardia (AVRT). Published studies suggest a considerable time gap between the onset of the arrhythmia, correct diagnosis, and RFA which may reach 10-15 years. The cost of medical treatment during that period may be substantial. The aim of the study was to calculate the annual direct medical cost of medical treatment of patients with AVNRT and AVRT and identify potential factors influencing this cost...
November 2016: Journal of Interventional Cardiac Electrophysiology: An International Journal of Arrhythmias and Pacing
https://www.readbyqxmd.com/read/27372051/prediction-of-atrial-fibrillation-in-patients-with-supraventricular-tachyarrhythmias-treated-with-catheter-ablation-or-not-classical-scores-are-not-useful
#15
Béatrice Brembilla-Perrot, Arnaud Olivier, Thibaut Villemin, Julie Vincent, Vladimir Manenti, Daniel Beurrier, Arnaud Terrier de la Chaise, Olivier Selton, Pierre Louis, Christian de Chillou, Jean Marc Sellal
BACKGROUND: Atrial fibrillation (AF) and other supraventricular tachyarrhythmias (SVTA) [atrial flutter (AFL), atrioventricular nodal reentrant tachycardia (AVNRT), atrioventricular reentrant tachycardia (AVRT) and preexcitation syndrome (PS)] are frequently associated. We assessed the AF occurrence frequency and predictors according to the nature of SVTA and completion of SVTA ablation. METHODS AND RESULTS: 4169 patients were referred for SVTA (typical AVNRT: 1338, AVRT over a concealed accessory pathway: 329, atypical AVNRT: 205, AFL: 1321; PS: 976); mean age was 50±20years; electrophysiological study (EPS) was systematic; patients were followed for a mean duration of 3±4...
October 1, 2016: International Journal of Cardiology
https://www.readbyqxmd.com/read/27221714/time-limited-cryomapping-during-tachycardia-improved-long-term-outcomes-for-cryoablation-of-avnrt
#16
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...
May 25, 2016: Journal of Interventional Cardiac Electrophysiology: An International Journal of Arrhythmias and Pacing
https://www.readbyqxmd.com/read/27198877/does-electrode-design-matter-in-ablation-effect-assessments
#17
EDITORIAL
Jacques Billette, Rafik Tadros
No abstract text is available yet for this article.
July 2016: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/27196507/long-postpacing-interval-after-entrainment-of-tachycardia-including-a-slow-conduction-zone-within-the-circuit
#18
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/27174905/catheter-ablation-vs-antiarrhythmic-drug-therapy-in-patients-with-symptomatic-atrioventricular-nodal-re-entrant-tachycardia-a-randomized-controlled-trial
#19
Demosthenes G Katritsis, Theodoros Zografos, George D Katritsis, Eleftherios Giazitzoglou, Vasilios Vachliotis, George Paxinos, Alan John Camm, Mark E Josephson
AIMS: To conduct a randomized trial in order to guide the optimum therapy of symptomatic atrioventricular nodal re-entrant tachycardia (AVNRT). METHODS AND RESULTS: Patients with at least one symptomatic episode of tachycardia per month and an electrophysiologic diagnosis of AVNRT were randomly assigned to catheter ablation or chronic antiarrhythmic drug (AAD) therapy with bisoprolol (5 mg od) and/or diltiazem (120-300 mg od). All patients were properly educated to treat subsequent tachycardia episodes with autonomic manoeuvres or a 'pill in the pocket' approach...
May 12, 2016: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/27134441/an-uncommon-case-of-spontaneous-conversion-from-av-re-entry-tachycardia-to-av-nodal-re-entry-tachycardia-in-a-patient-with-dual-tachycardia
#20
Ivan Zeljković, Ivica Benko, Šime Manola, Vjekoslav Radeljić, Nikola Pavlović
We report the case of a 46-year old patient in whom an electrophysiology study (EP) was performed due to paroxysmal supraventricular tachycardia documented in 12-lead ECG. During the EP study, supraventricular tachycardia was induced easily and it corresponded to orthodromic AV reentry tachycardia (AVRT) using a concealed left free wall accessory pathway. However, during the study AVRT spontaneously and repeatedly converted to the typical slow-fast AV node reentry tachycardia (AVNRT). Both accessory and AV nodal slow pathways were ablated, due to the finding that both AVRT and AVNRT were independently inducible during the EP study...
September 2015: Indian Pacing and Electrophysiology Journal
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