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Heart Surg Forum 2020 03 11;23(2):E114-E117. Epub 2020 Mar 11.

Department of Paediatrics, Renmin Hospital of Wuhan University, Wuhan, China.

Background: We aimed to evaluate the acute and long-term efficacy and safety of radiofrequency catheter ablation (RFCA) in Chinese pediatric patients with arrhythmias.

Methods: We gathered clinical data from pediatric patients who underwent RFCA in several large medical centers in China between 2000 and 2019.

Results: A total of 4,622 different substrates in 4,622 patients were ablated, with the majority consisting of supraventricular tachycardia (N = 3,831, 82. Read More

J Cardiovasc Electrophysiol 2020 Jun 24;31(6):1420-1429. Epub 2020 Apr 24.

Department of Cardiovascular Medicine, Gunma University Graduate School of Medicine, Maebashi, Gunma, Japan.

Introduction: Electrophysiological properties of reentry circuits of fast-slow atrioventricular nodal reentrant tachycardia (F/S-AVNRT) may contribute to cyclic variability after atrial induction.

Methods: In 156 atrial inductions of 33 patients with F/S-AVNRT, we measured the atrio-His (AH) and His-atrial (HA) intervals in the first cycle after the induction (AH[1] and HA[1], respectively), those in the second cycle (AH [2] and HA [2], respectively), and those during tachycardia that maintained a stable cycle length AH[T] and HA[T], respectively), and calculated the value of AH(1) minus AH(T) [ΔAH] and the value of HA(1) minus HA(T) [ΔHA] in each induction. According to the sum of ΔAH and ΔHA, tachycardia variability was classified as incremental (<-20), balanced (-20 to 20), or decremental (>20). Read More

HeartRhythm Case Rep 2020 Jan 30;6(1):8-10. Epub 2019 Sep 30.

Paediatric Cardiology and Cardiac Arrhythmias/Syncope Unit, Bambino Gesu Children's Hospital and Research Institute, Rome, Italy.

Int Heart J 2020 Mar 26;61(2):380-383. Epub 2019 Dec 26.

Department of Cardiovascular Medicine, Gunma University Graduate School of Medicine.

We report a case of atypical slow-slow atrioventricular nodal reentrant tachycardia (AVNRT) utilizing a superior slow pathway as a retrograde limb. The standard electrophysiological criteria confirm the diagnosis of this AVNRT by successfully excluding a diagnosis of atrial tachycardia and atrioventricular reentrant tachycardia. The earliest atrial activation during tachycardia was found at the interatrial septum 17. Read More

Indian Pacing Electrophysiol J 2020 Mar - Apr;20(2):70-72. Epub 2019 Dec 16.

Cardiology and Electrophysiology, Jacobi Medical Center, Montefiore Medical Center, United States. Electronic address:

We report a rare case of spontaneous initiation of Atrioventricular nodal reentry tachycardia (AVNRT) via 2 for 1 phenomenon, into a 2:1 AV block due to lower common pathway block and finally transition to 1:1 tachycardia. The premature atrial p wave traverses down both the fast and slow pathway simultaneously during 2 for 1 initiation and is met with subsequent typical AVNRT with 2:1 block. Infranodal location of the block is confirmed on electrophysiologic testing and is also cured by intervention. Read More

J Interv Card Electrophysiol 2019 Dec 9. Epub 2019 Dec 9.

Gill Heart Institute and VAMC, Cardiology, University of Kentucky, Lexington, KY, USA.

Introduction: Ventriculoatrial (VA) conduction is a critical component in many arrhythmias, has a diagnostic value in electrophysiology study (EPS), and is implicated in pacemaker-mediated arrhythmias. This study sought to characterize retrograde conduction during EPS and to utilize it as a diagnostic tool in patients without AV block.

Methods And Results: Patients with intact AV conduction undergoing EPS were included in this study to systematically evaluate baseline VA conduction. Read More

J Cardiovasc Electrophysiol 2020 Jan 1;31(1):137-143. Epub 2019 Dec 1.

Department of Cardiovascular Medicine, Mayo Clinic, Rochester, Minnesota.

Background: Limited data are available regarding the demographics, disease associations, and long-term prognosis of patients with inappropriate sinus tachycardia (IST).

Objective: To establish epidemiologic data for patients with IST, including symptom onset, comorbid disease, and long-term outcomes.

Methods: We retrospectively reviewed all patients with an IST diagnosis at the Mayo Clinic (Rochester, MN) during a 20-year period (1998-2018). Read More

Herzschrittmacherther Elektrophysiol 2019 Dec 11;30(4):336-342. Epub 2019 Nov 11.

II. Med. Klinik, Klinik für Kardiologie, Angiologie, Pneumologie, Klinikum Coburg, Ketschendorfer Str. 33, 96450, Coburg, Deutschland.

Supraventricular tachycardias (SVT) are common, with atrioventricular nodal reentry tachycardias (AVNRT) being the most common paroxysmal supraventricular tachycardia. The pathophysiological understanding and the catheter ablation of SVTs have developed steadily in recent years. For example, dividing AVNRT into "typical" and "atypical" depending on the HA-, VA-interval and AH/HA ratio is recommended. Read More

Medicine (Baltimore) 2019 Oct;98(41):e17333

El-Medica, EP-Network, Kielce.

Patients with structural heart disease (SHD) are more difficult to ablate than those with a structurally healthy heart. The reason may be technical problems. We compared periprocedural data in unselected patients (including SHD group) recruited for zero-fluoroscopy catheter ablation (ZF-CA) of supraventricular arrhythmias (SVTs). Read More

Clin Cardiol 2019 Nov 3;42(11):1121-1125. Epub 2019 Sep 3.

Department for Cardiology II: Electrophysiology, University Hospital Münster, Münster, Germany.

Background: Sarcoidosis is a multisystem granulomatous disease of not sufficiently understood origin. Some patients develop cardiac involvement in course of the disease which is mostly responsible for adverse outcome. In addition to complications like high degree atrioventricular (AV) block or ventricular tachyarrhythmias, there is a certain percentage of patients developing atrial tachyarrhythmias. Read More

J Atr Fibrillation 2019 Apr 30;11(6):2142. Epub 2019 Apr 30.

Heart Centre, King Faisal Specialist Hospital and Research Centre (KFSH&RC).

Cardiac electrophysiology study (EPS) and catheter ablation procedure are established diagnostic and therapeutic procedures for cardiac arrhythmias. Pulmonary embolism (PE) is a relatively rare but potentially fatal complication of Cardiac electrophysiology study (EPS). The paradoxical embolism (PDE) occurs due to an intracardiac defect with a right to left shunt with patent foramen ovale (PFO) being the most common cause. Read More

Cardiovasc Ultrasound 2019 Jun 11;17(1):12. Epub 2019 Jun 11.

Department of Internal Medicine, Division of Cardiology and Angiology, Magdeburg University, Leipzigerstr. 44, 39120, Magdeburg, Germany.

Background: A new zero-fluoroscopy technique for electrophysiology catheter navigation relying on intracardiac echocardiography (ICE) has been recently reported (Ice&ICE trial). We investigated potential differences in efficacy, safety or procedural performance between conventional fluoroscopy- and ICE-guided cryothermal ablation (CA) in symptomatic AVNRT patients.

Methods: Clinical and electrophysiological data of AVNRT patients included in the Ice&ICE trial (22 patients, 16 females; =zero-fluoroscopy group) were compared to those of consecutive AVNRT patients, who underwent fluoroscopy-guided CA (25 patients, 17 females; = fluoroscopy group) during the last 2 years in our institution. Read More

Pacing Clin Electrophysiol 2019 07 10;42(7):937-941. Epub 2019 Jun 10.

Division of Cardiovascular Medicine, and Veterans Administration Medical Center, Gill Heart & Vascular Institute, University of Kentucky, Lexington, Kentucky.

Background: Atrioventricular nodal reentrant tachycardia (AVNRT) is the most common type of supraventricular tachycardia (SVT). Similar to other cardiac tests and interventions, gender bias may influence clinical decision making in providing appropriate care for AVNRT patients. We assessed for gender differences in the diagnosis and management of AVNRT patients who underwent catheter ablation. Read More

Int Heart J 2019 May 17;60(3):756-760. Epub 2019 May 17.

Department of Cardiovascular Medicine, Gunma University Graduate School of Medicine.

We report a case of atypical fast-slow atrioventricular nodal reentrant tachycardia (AVNRT) using a slow pathway variant extending to the superoanterior right atrium. The AVNRT diagnosis was confirmed by using standard electrophysiological criteria that exclude a diagnosis of atrial tachycardia and atrioventricular reentrant tachycardia. The earliest atrial activation during tachycardia was found in the superoanterior right atrium adjacent to the tricuspid annulus, where the first delivery of radiofrequency energy terminated and eliminated the inducibility of the tachycardia. Read More

Int Heart J 2019 May 17;60(3):761-767. Epub 2019 May 17.

Cardiovascular Center, Sakurabashi-Watanabe Hospital.

A 70-year-old woman was admitted for treatment of supraventricular tachycardia. Ventriculoatrial conduction was revealed through programmed ventricular stimulation; the coronary sinus ostium (CSos) was the earliest atrial activation site. The fast-slow forms of atrioventricular nodal reentrant tachycardia (AVNRT) were induced by ventricular extra-stimuli. Read More

Indian Pacing Electrophysiol J 2019 Sep - Oct;19(5):178-182. Epub 2019 Apr 26.

Electrophysiology Department of the Instituto de Cardiologia do Rio Grande do Sul / Fundação Universitária de Cardiologia, Porto Alegre, Rio Grande do Sul, Brazil.

Introduction: Common clinical teaching, for invasive electrophysiology, is that if the first year fellow cannulates the coronary sinus (CS) in his first attempt, the arrhythmia is more likely to be atrioventricular nodal reentry tachycardia (AVNRT). This general perception has not yet been clinically tested. We evaluated this theory in prospective patients undergoing an electrophysiological study (EPS) for paroxysmal supraventricular tachycardia (PSVT). Read More

Rev Port Cardiol 2019 03 9;38(3):187-192. Epub 2019 Apr 9.

Hospital da Luz, Centro do Ritmo, Lisboa, Portugal.

Introduction And Aims: Remote magnetic navigation systems have demonstrated benefits in the ablation of difficult substrates. Their role in the ablation of atrioventricular nodal reentrant tachycardia (AVNRT), however, has only been studied in small patient series. The aim of this study was to compare the results of AVNRT ablation using magnetic navigation, in a center where every procedure is performed with this system, with manual ablation. Read More

Acta Cardiol Sin 2019 Mar;35(2):134-143

Department of Pediatrics, National Taiwan University Hospital, Taipei.

Background: Cryoablation is an alternative treatment for atrioventricular nodal reentrant tachycardia (AVNRT) and right anteroseptal and midseptal accessory pathways (APs) with a low complication rate. A high recurrence rate is still a concern in pediatric patients.

Methods: From February 2015 to March 2017, all consecutive patients who underwent cryoablation for supraventricular tachycardia were included in this study. Read More

Heart Rhythm 2019 08 28;16(8):1182-1188. Epub 2019 Feb 28.

Heart Centre, Department of Public Health and Clinical Medicine, Umeå University, Umeå, Sweden.

Background: Catheter ablation of the slow pathway is the standard treatment of atrioventricular nodal reentry tachycardia (AVNRT) with a well described low risk of periprocedural atrioventricular block. Less is known about the risk of pacemaker implantation late after ablation.

Objective: We aimed to quantify the risk of late pacemaker implantation in a countrywide cohort undergoing first-time ablation for AVNRT. Read More

JACC Clin Electrophysiol 2019 01 28;5(1):113-119. Epub 2018 Nov 28.

Heart and Vascular Center, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts.

Objectives: This study sought to investigate markers of success following slow pathway ablation for atrioventricular nodal re-entrant tachycardia (AVNRT).

Background: Published data are conflicting.

Methods: The authors studied 1,007 patients with typical AVNRT and 77 patients with atypical AVNRT. Read More

Eur J Radiol 2019 Jan 20;110:105-111. Epub 2018 Nov 20.

Medical University of Innsbruck, University Clinic of Internal Medicine III / Cardiology and Angiology, Innsbruck, Austria. Electronic address:

Background: Exposure to high doses of radiation during cardiac interventional procedures is associated with increased rates of cataract and cancer in patients and staff members. Thus, reduction of radiation is recommended by international medical societies. The aim of this study was to evaluate, if the lowest reasonable fluoroscopic acquisition setting for electrophysiological procedures using a novel X-ray detector operated at a minimum detector entrance dose per fluoroscopy pulse is feasible and safe. Read More

Scand Cardiovasc J 2018 Dec 25;52(6):362-366. Epub 2019 Jan 25.

a Department of Cardiology , Haukeland University Hospital , Bergen , Norway.

Objectives: Catheter ablation is regarded as first-line therapy for symptomatic atrioventricular nodal reentry tachycardia (AVNRT). Ablation induces intended myocardial damage and the extent of myocardial damage may differ between ablation methods. The objective of this MAGMA AVNRT(NCT00875914) substudy was to compare high-sensitive cardiac troponin T (hs-cTnT) levels as a surrogate marker for myocardial damage after manually guided (MAN) AVNRT ablation versus AVNRT ablation using remote magnetic navigation (RMN). Read More

Pacing Clin Electrophysiol 2019 02 8;42(2):267-274. Epub 2019 Jan 8.

Cardiovascular Center, Tsuchiura Kyodo Hospital, Ibaraki, Japan.

Purpose: Low-dose adenosine triphosphate (LD-ATP) is useful for diagnosing ATP-sensitive atrial tachycardia. However, the clinical implications of the sensitivity of LD-ATP in atrioventricular nodal reentrant tachycardia (AVNRT) still remain unknown. This study aimed to evaluate the mechanism of LD-ATP sensitivity in slow-fast AVNRT. Read More

J Electrocardiol 2018 Nov - Dec;51(6):1045-1051. Epub 2018 Aug 18.

Department of Cardiology, University of Health Sciences - Adana Health Practice and Research Center, Adana, Turkey. Electronic address:

Aim: A combined aVR criterion is described as the presence of a pseudo r' wave in aVR during tachycardia in patients without r' wave in aVR in sinus rhythm and/or a ≥50% increase in r' wave amplitude compared to sinus rhythm in patients with r' wave in the basal aVR lead. We aimed to investigate the use of combined aVR criterion in differential diagnosis of atrioventricular nodal reentrant tachycardia (AVNRT) and atrioventricular reciprocating tachycardia (AVRT).

Methods: In this prospective study, 480 patients with inducible narrow QRS supraventricular tachycardia (SVT) were included. Read More

J Electrocardiol 2019 Jan - Feb;52:63-65. Epub 2018 Nov 6.

Department of Cardiology, Gifu University, Graduate School of Medicine, 1-1 Yanagido, Gifu 501-1194, Japan.

The role of left AV nodal (SVN) connections in the genesis of "left-variant" atypical atrioventricular nodal reentrant tachycardia (AVNRT) and those with multiple retrograde pathways remain unclear. We describe an unusual case of "left-variant" atypical AVNRT, where change in the retrograde earliest atrial activation site (REAAS) at the coronary sinus (CS) following radiofrequency catheter ablation (RFCA) was observed. Our observation suggests that the REAAS, that is, the left AVN connections, could participate in the formation of the reentrant circuit of "left-variant" atypical AVNRT. Read More

Am J Emerg Med 2019 02 12;37(2):379.e5-379.e7. Epub 2018 Nov 12.

McGovern Medical School, University of Texas Health Science Center at Houston, (UTHealth), Department of Emergency Medicine, United States of America.

Regular, narrow complex tachycardia with a ventricular rate around 150 can be challenging. The differential includes sinus tachycardia, atrioventricular nodal reentrant tachycardia (AVNRT), atrioventricular reentrant tachycardia (AVRT), and atrial tachycardia (focal or macro re-entrant - i.e. Read More

Scand Cardiovasc J 2018 Oct 9;52(5):268-274. Epub 2019 Jan 9.

a Department of Cardiovascular Sciences , University of Leuven , Leuven , Belgium.

Aim: 3D Rotational angiography (3DRA) allows for detailed reconstruction of atrial anatomy and is often used to facilitate pulmonary vein isolation. This study aimed to reappraise the anatomy of the right atrium (RA) using 3DRA, specifically looking at Koch's triangle and the cavotricuspid isthmus (CTI) in atrio-ventricular reentrant tachycardia (AVNRT) and atrial flutter (AFl) ablation.

Methods And Results: 3DRA was performed in 97 patients: AVNRT = 51 and AFl = 46. Read More

Circ Arrhythm Electrophysiol 2018 09;11(9):e006631

Heart Rhythm Institute, University of Oklahoma Health Sciences Center (S.S., W.M.J., D.L., H.N., K.B., K.E., S.S.P.).

Background We describe a technique to localize the ablation target in patients with an unusual variant of slow/fast atrioventricular nodal reentrant tachycardia (AVNRT) using a slow pathway connecting to the basal inferolateral left atrium. Methods Consecutive patients with slow/fast AVNRT were included. During stable slow/fast AVNRT, a single late atrial extrastimulus (AES) was delivered at the inferolateral left atrium near the mitral annulus. Read More

J Interv Card Electrophysiol 2018 Dec 6;53(3):365-371. Epub 2018 Oct 6.

Department of Medicine, Section of Cardiology, Center for Arrhythmia Care, Heart and Vascular Center, University of Chicago Medicine Pritzker School of Medicine, 5841 S. Maryland Avenue, MC 6092, Chicago, IL, 60637, USA.

Purpose: This study aimed to determine the incidence, prevalence, and predictors of atrial arrhythmias (AAs) in patients with symptomatic sinus node dysfunction (SND) who required permanent pacemaker implantation. Also, we evaluated the impact of atrial pacing (AP) on AAs.

Methods: All consecutive patients who underwent pacemaker implantation from 2005 to 2011 were included. Read More

Turk J Emerg Med 2018 Sep 13;18(3):131-133. Epub 2018 Apr 13.

Sisli Hamidiye Etfal Education and Research Hospital, Department of Emergency Medicine, Istanbul, Turkey.

Atrioventricular nodal reentrant tachycardia (AVNRT) is the most common type of reentrant paroxysmal supraventricular tachycardia that occurs in the presence of dual AV nodal physiology. Wolff-Parkinson-White (WPW) syndrome is another type of supraventricular tachycardia characterized by short PR intervals, delta waves and wide QRS complexes on the surface electrocardiogram (ECG), reflecting atrioventricular pre-excitation. Uncommonly, AV nodal reentry and accessory pathways can coexist. Read More

Zhonghua Er Ke Za Zhi 2018 Sep;56(9):674-679

Pediatric Cardiologic Department of Tsinghua University First Hospital, Beijing 100016, China.

To investigate the clinical features and evaluate the efficacy of radiofrequency catheter ablation (RFCA) guided by 3D electronic-anatomy mapping system (CARTO3 System) in children with atrioventricular nodal reentrant tachycardia (AVNRT). This was a retrospective case-controlled study. Data were collected from 95 children with AVNRT who underwent RFCA using CARTO3 System in the first hospital of Tsinghua University from January 2014 to December 2017. Read More

Pacing Clin Electrophysiol 2018 12 29;41(12):1684-1686. Epub 2018 Aug 29.

Cardiology Division, Department of Medicine, New York Medical College, Westchester Medical Center, Valhalla, New York.

Background: Atrioventricular nodal reentrant tachycardia (AVNRT) after orthotropic heart transplant (OHT) is rare, in absence of rejection.

Case: We report a case of a 51-year-old male who underwent simultaneous kidney and heart transplant. Three months after implantation he developed episodes of dyspnea, dizziness, and palpitations. Read More

J Interv Card Electrophysiol 2019 Apr 21;54(3):277-281. Epub 2018 Jul 21.

Division of Pediatric Cardiology, University of Nebraska Medical Center/Children's Hospital & Medical Center, 8200 Dodge Street, 4th Floor SPC: Cardiology, Omaha, NE, 68114, USA.

Purpose: Patients with atrioventricular nodal reentry tachycardia (AVNRT) often are managed successfully by ablation of the slow pathway with success rates reported as high as 99%. Low voltage bridges (LVBs) have been demonstrated to be helpful in guiding AVNRT ablation. Patients may present to the electrophysiology lab without evidence of inducible arrhythmia. Read More

JACC Clin Electrophysiol 2018 07 28;4(7):872-880. Epub 2018 Mar 28.

Section of Cardiac Electrophysiology, Division of Cardiology, University of California, San Francisco, San Francisco, California.

Objectives: This study hypothesized that early coupled ventricular extrastimuli (V) stimulation might yield a more robust differentiation between atrioventricular nodal re-entrant tachycardia (AVNRT) and atrioventricular re-entrant tachycardia (AVRT).

Background: Programmed V during supraventricular tachycardia are useful to differentiate AVNRT from AVRT by subtracting the ventriculoatrial (VA) interval from the stimulus to atrial depolarization (stimulus atrial [SA]) interval, but all such maneuvers have limitations.

Methods: Patients with either AVNRT or AVRT were investigated. Read More

G Ital Cardiol (Rome) 2018 Apr;19(4):222-231

Reparto di Cardiologia, Città di Lecce Hospital, GVM Care&Research, Lecce.

The atrioventricular (AV) node is an anatomically well-defined structure, conveniently housed in the triangle of Koch. There are two distinct atrial impulse approaches to the AV node, one of which (in the anterior portion of triangle of Koch) has a faster conduction, while the other one (in the posterior portion) has a slower conduction. However, it is not said that such a conductive duality translates into any arrhythmic phenomena. Read More

J Interv Card Electrophysiol 2018 Aug 16;52(3):271-279. Epub 2018 Jun 16.

Department of Medicine, Division of Cardiology, Weill Cornell Medical Center, 525 East 68th Street, New York, NY, 10065, USA.

In delaying transmission of the cardiac impulse from the atria to the ventricles, the atrioventricular (AV) node serves a critical function in augmenting ventricular filling during diastole and limiting the ventricular response during atrial tachyarrhythmias. The complex structure of the nodal region, however, also provides the substrate for reentrant rhythms. Recent discoveries have elucidated the cellular basis and anatomical determinants of slow conduction in the node. Read More

Pacing Clin Electrophysiol 2018 09 26;41(9):1232-1234. Epub 2018 Jul 26.

Department of Cardiology, Liverpool Heart and Chest Hospital, Liverpool, UK.

Card Electrophysiol Clin 2018 06;10(2):277-297

Heart and Vessels Department, University of Florence, Largo Brambilla, 3, Florence 50134, Italy; IRCCS Multimedica, Cardiology Department, Via Milanese, 300, 20099 Sesto San Giovanni, Italy.

Atrioventricular node reentrant tachycardia (AVNRT) is a supraventricular arrhythmia easily diagnosed by 12-lead electrocardiogram. What is far more challenging, is the understanding of the reentrant circuit in its typical and atypical presentations. The function of the atrioventricular node is still incomplete and this knowledge gap is reflected in the reconstruction of the pathways used by AVNRT in its multiform presentations. Read More

J Interv Card Electrophysiol 2018 Nov 15;53(2):267-277. Epub 2018 May 15.

Department of Electrophysiology, Electrophysiology Center Bremen, Senator-Weßling-Str. 1, 28277, Bremen, Germany.

Purpose: Radiofrequency current energy (RFC) ablation is still considered as the gold standard for atrioventricular nodal reentrant tachycardia (AVNRT). Success-rates for AVNRT ablation vary irrespective of the ablation technology and strategy. This study aimed to access safety, efficacy, and long-term outcome of RFC catheter ablation for the treatment of AVNRT in children and adolescents aged < 19 years with special focus on modulation versus ablation of the AV nodal slow pathway (SP). Read More

J Cardiovasc Electrophysiol 2018 08 24;29(8):1096-1103. Epub 2018 May 24.

Heart Rhythm Center and Division of Cardiology, Department of Medicine, Taipei Veterans General Hospital, Taipei, Taiwan.

Background: Coexistence of idiopathic left fascicular ventricular tachycardia (ILFVT) and atrioventricular nodal reentrant tachycardia (AVNRT) has been rarely reported.

Objectives: The study aimed at elucidating the prevalence of coexisted AVNRT in patients with ILFVT during longitudinal follow-up. The electrophysiological properties and clinical predictors of coexisted ILFVT and AVNRT were investigated. Read More

J Cardiovasc Electrophysiol 2018 08 18;29(8):1167-1168. Epub 2018 May 18.

Arrhythmia & EP Research Center, IRCCS Humanitas Research & University Hospital, Rozzano, Milan, Italy.

J Cardiovasc Electrophysiol 2018 08 7;29(8):1177-1180. Epub 2018 May 7.

Department of Cardiology, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Thiruvananthapuram, Kerala, India.

Cardiol J 2019 3;26(3):226-232. Epub 2018 Apr 3.

Arrhythmia and Electrophysiology, Department of Cardiology, University Heart Center, University Hospital Zurich, Switzerland.

Background: Awareness of risks associated with radiation exposure to patients and medical staff has significantly increased. It has been reported before that the use of advanced three-dimensional electroanatomical mapping (EAM) system significantly reduces fluoroscopy time, however this study aimed for zero or near zero fluoroscopy ablation to assess its feasibility and safety in ablation of atrial fibrillation (AF) and other tachyarrhythmias in a "real world" experience of a single tertiary care center.

Methods: This was a single-center study where ablation procedures were attempted without fluoroscopy in 34 consecutive patients with different tachyarrhythmias under the support of EAM system. Read More

J Interv Card Electrophysiol 2018 Jul 19;52(2):157-161. Epub 2018 Mar 19.

Division of Clinical and Experimental Electrophysiology, Department of Cardiovascular Medicine, University Hospital Münster, Münster, Germany.

Purpose: Slow pathway modulation is the treatment of choice in patients with atrioventricular nodal reentrant tachycardia (AVNRT). No comparative data on ablation strategies exist. Therefore, we sought to compare two common ablation approaches. Read More

Circ Arrhythm Electrophysiol 2018 03;11(3):e005907

From the Hygeia Hospital, Athens, Greece (D.G.K., T.Z.); Brigham and Women's Hospital, Harvard Medical School, Boston, MA (R.M.J., R.G.M., W.G.S.); University of Michigan Health System, Ann Arbor (R.L., F.M.); Imperial University Hospitals NHS Trust, London, United Kingdom (G.D.K.); and Biomedical Engineering, The George Washington University, Washington, DC (I.R.E.).

Background: Immunohistochemistry studies suggest that the anatomic substrate of the slow pathway in atrioventricular nodal reentrant tachycardia (AVNRT) is the left inferior nodal extension. We hypothesized that slow pathway ablation from the left septum is an effective alternative to right-sided ablation.

Methods And Results: We analyzed our databases of AVNRT in search of cases that had used slow pathway ablation from the left septum because of failure of right septal ablation, and then prospectively subjected consenting patients to a left septal-only procedure. Read More

J Electrocardiol 2018 May - Jun;51(3):467-469. Epub 2018 Feb 3.

Department of Cardiology and Clinical Examination, Oita University Faculty of Medicine, Oita, Japan.

Atrioventricular reciprocating tachycardia (AVRT) and atrioventricular nodal re-entrant tachycardia (AVNRT) can coexist and present unidirectional transition (from AVRT to AVNRT, or from AVNRT to AVRT) in a single patient. Actually, such cases have already been reported previously. However, a case with spontaneous bidirectional transition of both tachycardias during supraventricular tachycardia has never been reported. Read More

Clin Res Cardiol 2018 Jul 23;107(7):578-585. Epub 2018 Feb 23.

Heart and Vascular Centre, Mater Private Hospital, 72 Eccles Street, Dublin 7, Ireland.

Aims: Zero- and near-zero-fluoroscopic ablation techniques reduce the harmful effects of ionizing radiation during invasive electrophysiology procedures. We aimed to test the feasibility and safety of a zero-fluoroscopic strategy using a novel integrated magnetic and impedance-based electroanatomical mapping system for radiofrequency ablation (RFA) of supraventricular tachycardias (SVTs).

Methods: We retrospectively studied 92 consecutive patients undergoing electrophysiology studies with/without RFA for supraventricular tachycardia (SVT) performed by a single operator at a single center. Read More

Adv Med Sci 2018 Sep 10;63(2):249-256. Epub 2018 Feb 10.

Elmedica, EP-Network, Kielce, Poland; Chair of Electroradiology, Faculty of Medicine, University of Rzeszow, Rzeszow, Poland; Podkarpackie Center for Cardiovascular Intervention, G.V.M. Carint, Sanok, Poland.

Purpose: During incremental atrial pacing in patients with atrioventricular nodal reentrant tachycardia, the PR interval often exceeds the RR interval (PR > RR) during stable 1:1 AV conduction. However, the PR/RR ratio has never been evaluated in a large group of patients with pacing from the proximal coronary sinus and after isoproterenol challenge. Our study validates new site of pacing and easier method of identification of PR > RR. Read More