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Atrial tachycardia

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https://www.readbyqxmd.com/read/29781518/an-interesting-case-of-wide-qrs-tachycardia-with-right-bundle-branch-block-morphology-what-is-the-mechanism
#1
Krishna Kumar Mohanan Nair, Narayanan Namboodiri, Hiren Kevadiya, Ajitkumar Valaparambil
A 30 year old gentleman with no structural heart disease has been evaluated for paroxysmal palpitation with documented regular wide QRS tachycardia that has not responded to IV adenosine. Surface electrocardiogram has not shown any pre-excitation. He has been taken for an EP study after informed consent. Diagnostic catheters were placed at coronary sinus (CS), His bundle region and right ventricle (RV). During catheter manipulation a regular wide QRS tachycardia with right bundle branch block morphology (RBBB) with a tachycardia cycle length (TCL) of 400 ms and normal QRS axis similar to the clinical tachycardia got induced (Fig:1)...
May 21, 2018: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/29779523/reentrant-atrial-tachycardia-originating-from-the-sinus-venosa-region
#2
Ryo Sasaki, Hisashi Yokoshiki, Yuki Chiba, Motoki Maeno, Hirofumi Mitsuyama, Masaya Watanabe, Taro Tenma, Rui Kamada, Masayuki Takahashi, Minoru Ota
A 78-year old woman with palpitation exhibited an atrial tachycardia (AT) of variable cycle lengths resembling atrial fibrillation (AF). Vague centrifugal activation was noted at the sinus venosa region where overdrive pacing demonstrated entrainment with concealed fusion and the stimulus to P wave approximated the electrogram to the P wave interval of 125ms. Application of radiofrequency energy to this site resulted in termination of the AT as well as formation of a fixed block line manifested by the presence of discrete double potentials...
May 2018: Journal of Electrocardiology
https://www.readbyqxmd.com/read/29779522/sinus-tachycardia-presenting-as-a-wide-and-narrow-complex-tachyarrhythmia-what-is-the-link
#3
Chenni S Sriram, Mario D Gonzalez
We describe a neonate that developed alternating wide and narrow complex tachycardias following heart surgery for congenital heart defect. Although the etiology was sinus tachycardia, a premature atrial complex initiated aberrancy due to phase 3 block that was perpetuated due to 'linking' at similar or even slower heart rates. Similarly, there was abrupt transition from wide to narrow complex tachycardia following a premature ventricular complex without a change in subsequent heart rate. This was explained by interruption of linking phenomenon by premature ventricular activation...
May 2018: Journal of Electrocardiology
https://www.readbyqxmd.com/read/29778339/lower-risk-of-postoperative-arrhythmias-in-congenital-heart-surgery-following-intraoperative-administration-of-magnesium
#4
Dingchao He, Nimisha Aggarwal, David Zurakowski, Richard A Jonas, Charles I Berul, Sridhar Hanumanthaiah, Jeffrey P Moak
OBJECTIVES: Postoperative arrhythmias are common in children undergoing congenital heart surgery. We evaluated whether intraoperative administration of magnesium was associated with a reduced occurrence of specific postoperative arrhythmias, as has been described previously, or had a broader effect on multiple arrhythmia types, and whether there existed a dose-effect of intraoperative magnesium. METHODS: We used a historical prospective observational cohort study...
April 18, 2018: Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/29776964/arrhythmias-in-adult-patients-with-congenital-heart-disease-and-pulmonary-arterial-hypertension
#5
Maria Drakopoulou, Heba Nashat, Aleksander Kempny, Rafael Alonso-Gonzalez, Lorna Swan, Stephen J Wort, Laura C Price, Colm McCabe, Tom Wong, Michael A Gatzoulis, Sabine Ernst, Konstantinos Dimopoulos
OBJECTIVES: Approximately 5%-10% of adults with congenital heart disease (CHD) develop pulmonary arterial hypertension (PAH), which affects life expectancy and quality of life. Arrhythmias are common among these patients, but their incidence and impact on outcome remains uncertain. METHODS: All adult patients with PAH associated with CHD (PAH-CHD) seen in a tertiary centre between 2007 and 2015 were followed for new-onset atrial or ventricular arrhythmia. Clinical variables associated with arrhythmia and their relation to mortality were assessed using Cox analysis...
May 18, 2018: Heart: Official Journal of the British Cardiac Society
https://www.readbyqxmd.com/read/29769223/comprehensive-multicenter-study-of-the-common-isthmus-in-post-atrial-fibrillation-ablation-multiple-loop-atrial-tachycardia
#6
Masateru Takigawa, Nicolas Derval, Philippe Maury, Ruairidh Martin, Arnaud Denis, Shinsuke Miyazaki, Seigo Yamashita, Antonio Frontera, Konstantinos Vlachos, Takeshi Kitamura, Ghassen Cheniti, Greégoire Massoullieé, Nathaniel Thompson, Claire A Martin, Michael Wolf, Xavier Pillois, Josselin Duchateau, Nicolas Klotz, Alexandre Duparc, Anne Rollin, Thomas Pambrun, Frédéric Sacher, Hubert Cochet, Mélèze Hocini, Michel Haiïssaguerre, Pierre Jaiïs
BACKGROUND: Characteristics of multiple-loop atrial tachycardia (AT) circuits have never precisely examined. METHODS: In 193 consecutive post-atrial fibrillation ablation patients with AT, 44 multiple-loop ATs including 42 dual-loop AT and 2 triple-loop AT in 41 (21.2%) were diagnosed with the high-resolution mapping system and analyzed off-line. RESULTS: In dual-loop ATs, 3 types were identified: type M, a combination of 2 anatomic macroreentrant ATs (AMATs) in 19 (43...
June 2018: Circulation. Arrhythmia and Electrophysiology
https://www.readbyqxmd.com/read/29759837/clinical-features-and-sites-of-ablation-for-patients-with-incessant-supraventricular-tachycardia-from-concealed-nodofascicular-and-nodoventricular-tachycardias
#7
Frederick T Han, Eric M Riles, Nitish Badhwar, Melvin M Scheinman
OBJECTIVES: This study sought to describe the clinical features and sites of successful ablation for incessant nodofascicular (NF) and nodoventricular (NV) tachycardias. BACKGROUND: Incessant supraventricular tachycardias have been associated with tachycardia-induced cardiomyopathies and have been previously attributed to permanent junctional reciprocating tachycardias, atrial tachycardias, and atrioventricular nodal re-entrant tachycardias. Incessant concealed NF and NV tachycardias have not been described previously...
December 26, 2017: JACC. Clinical Electrophysiology
https://www.readbyqxmd.com/read/29759784/atrial-tachycardias-after-surgical-atrial-fibrillation-ablation-clinical-characteristics-electrophysiological-mechanisms-and-ablation-outcomes-from-a-large-multicenter-study
#8
Rakesh Gopinathannair, Philip L Mar, Muhammad Rizwan Afzal, Luigi Di Biase, Yixi Tu, Thanmay Lakkireddy, Jaimin R Trivedi, Mark S Slaughter, Andrea Natale, Dhanunjaya Lakkireddy
OBJECTIVES: The clinical characteristics, electrophysiological mechanisms, and ablation outcomes of post-surgical atrial fibrillation ablation (SAFA) atrial tachycardias (ATs) have not been studied in a large, multicenter cohort. BACKGROUND: ATs are often seen following SAFA. METHODS: Analysis was performed on 137 patients (age, 62 ± 10 years; 74% male) who underwent catheter ablation for symptomatic post-SAFA AT from 2004 to 2013 at 3 high-volume institutions in the United States...
August 2017: JACC. Clinical Electrophysiology
https://www.readbyqxmd.com/read/29759722/new-insights-into-an-old-arrhythmia-high-resolution-mapping-demonstrates-conduction-and-substrate-variability-in-right-atrial-macro-re-entrant-tachycardia
#9
Bhupesh Pathik, Geoffrey Lee, Frédéric Sacher, Pierre Jaïs, Grégoire Massoullié, Nicolas Derval, Matthew G Bates, Jonathan Lipton, Stephen Joseph, Joseph Morton, Paul Sparks, Peter Kistler, Jonathan M Kalman
OBJECTIVES: Using high-resolution 3-dimensional (3D) mapping, the aim of this study was to further characterize right atrial macro-re-entrant tachycardias and answer unresolved questions in the understanding of this arrhythmia. BACKGROUND: Despite advances in understanding of the mechanisms of right atrial macro-re-entrant tachycardias, many questions lack definitive answers. The advent of high-resolution 3D mapping provides an opportunity to gain further insights into the nature of these common circuits...
September 2017: JACC. Clinical Electrophysiology
https://www.readbyqxmd.com/read/29759622/5-year-outcome-of-pulmonary-vein-isolation-by-loss-of-pace-capture-on-the-ablation-line-versus-electrical-circumferential-pulmonary-vein-isolation
#10
Julia Moser, Arian Sultan, Jakob Lüker, Helge Servatius, Tim Salzbrunn, Manuel Altenburg, Benjamin Schäffer, Doreen Schreiber, Ruken Ö Akbulak, Julia Vogler, Boris A Hoffmann, Stephan Willems, Daniel Steven
OBJECTIVES: This study sought to compare long-term arrhythmia-free survival between electrical circumferential pulmonary vein isolation (PVI) and PVI with the endpoint of unexcitability along the ablation line. BACKGROUND: PVI is the standard ablation strategy of paroxysmal atrial fibrillation, although arrhythmia recurrence in long-term follow-up (FU) is high. The endpoint of unexcitability along the ablation line results in decreased arrhythmia recurrence compared to electrical PVI in 1-year FU...
November 2017: JACC. Clinical Electrophysiology
https://www.readbyqxmd.com/read/29759621/analyses-of-the-mode-of-termination-during-diagnostic-ventricular-pacing-to-differentiate-the-mechanisms-of-supraventricular-tachycardias
#11
Mitsunori Maruyama, Shunsuke Uetake, Yasushi Miyauchi, Yoshihiko Seino, Wataru Shimizu
OBJECTIVES: The goal of this study was to determine the diagnostic yield of analyzing the mode of termination during ventricular overdrive pacing (VOP) to differentiate the mechanisms of supraventricular tachycardias (SVTs). BACKGROUND: The majority of the diagnostic criteria for VOP rely on successful entrainment, but termination of SVTs is common during VOP. METHODS: We studied 225 SVTs with a 1:1 atrioventricular relationship, including 34 atrial tachycardias, 67 orthodromic reciprocating tachycardias (ORTs) (including 4 ORTs using accessory pathways [APs] with decremental properties), and 124 atrioventricular nodal re-entrant tachycardias...
November 2017: JACC. Clinical Electrophysiology
https://www.readbyqxmd.com/read/29759619/catheter-ablation-for-cardiac-arrhythmias-utilization-and-in-hospital-complications-2000-to-2013
#12
Seyed Mohammadreza Hosseini, Guy Rozen, Ahmed Saleh, Jeena Vaid, Yitschak Biton, Kasra Moazzami, E Kevin Heist, Moussa C Mansour, M Ihsan Kaadan, Mark Vangel, Jeremy N Ruskin
OBJECTIVES: This study sought to investigate the utilization of and in-hospital complications in patients undergoing catheter ablation in the United States from 2000 to 2013 by using the National Inpatient Sample and Nationwide Inpatient Sample. BACKGROUND: Catheter ablation has become a mainstay in the treatment of a wide range of cardiac arrhythmias. METHODS: This study identified patients 18 years of age and older who underwent inpatient catheter ablation from 2000 to 2013 and had 1 primary diagnosis of any of the following arrhythmias: atrial fibrillation, atrial flutter, supraventricular tachycardia, or ventricular tachycardia...
November 2017: JACC. Clinical Electrophysiology
https://www.readbyqxmd.com/read/29755944/intra-atrial-reentrant-tachycardia-originating-from-the-pulmonary-vein-cuff-anastomosis-in-a-lung-transplantation-patient-ultra-high-density-3-dimensional-mapping
#13
Jae-Sun Uhm, Moo Suk Park, Boyoung Joung, Hui-Nam Pak, Hyo Chae Paik, Moon-Hyoung Lee
No abstract text is available yet for this article.
April 2018: HeartRhythm Case Reports
https://www.readbyqxmd.com/read/29755939/an-original-management-of-focal-atrial-tachycardia-originating-from-a-giant-left-atrial-appendage
#14
Stéphane Combes, Jean Paul Albenque, Nicolas Combes, Serge Boveda, Christelle Cardin, Vlad Ciobotaru, Issam Abouliatim
No abstract text is available yet for this article.
April 2018: HeartRhythm Case Reports
https://www.readbyqxmd.com/read/29755626/the-impact-of-admission-serum-creatinine-on-major-adverse-clinical-events-in-st-segment-elevation-myocardial-infarction-patients-undergoing-primary-percutaneous-coronary-intervention
#15
Poornima Vinod, Taylor Kann, Shyam Polaconda, Alibel Bello, Mohamed Khayata, Fernando Munoz, Vinod Krishnappa, Rupesh Raina
Background: Impaired renal function has been shown in previous studies to be an independent predictor of cardiovascular adverse events amongst patients admitted for percutaneous coronary intervention (PCI) following ST-segment elevation myocardial infarction (STEMI). This study investigates the impact of admission serum creatinine (SCr) on major cardiovascular outcomes among STEMI patients undergoing PCI. Methods: A retrospective study of patients admitted for PCI following STEMI was conducted using the National Cardiovascular Database Action Registry (NCDR) at Cleveland Clinic Akron General (CCAG) Hospital...
April 2018: Cardiology Research
https://www.readbyqxmd.com/read/29749082/effect-of-induced-chronic-atrial-fibrillation-on-exercise-performance-in-standardbred-trotters
#16
Rikke Buhl, Helena Carstensen, Eva Zander Hesselkilde, Bjørg Zinkernagel Klein, Karen Margrethe Hougaard, Kirsten Bomberg Ravn, Ameli Victoria Loft-Andersen, Merle Friederike Fenner, Christian Pipper, Thomas Jespersen
BACKGROUND: Atrial fibrillation (AF) is the most common arrhythmia affecting performance in horses. However, no previous studies have quantified the performance reduction in horses suffering from AF. OBJECTIVES: To quantify the effect of AF on maximum velocity (Vmax ), maximum heart rate (HRmax ), heart rate recovery (T100 ), hematologic parameters and development of abnormal QRS complexes. ANIMALS: Nine Standardbred trotters. METHODS: Two-arm controlled trial...
May 10, 2018: Journal of Veterinary Internal Medicine
https://www.readbyqxmd.com/read/29744125/a-rare-case-of-pacemaker-induced-tachycardia-in-an-elderly-woman-with-cor-triatriatum-sinistrum
#17
Nicoleta Cornelia Mirescu, Lucian Mureşan, Anca Daniela Farcaş
Pacemaker induced tachycardia (PIT) is a rare iatrogenic rhythm disorder which tipically occurs in patients with dual-chamber pacemakers and has different causes, including oversensing of atrial tachyarrhythmia waves. Cor triatriatum sinistrum is a congenital abnormality infrequent in adults, associated with a high risk of atrial tachyarrhythmia. We present the case of a 80-year-old woman incidentally diagnosed with cor triatriatum sinistrum echocardiographycally, implanted with a DDD pacemaker for sinus node disease, who developed atrial tachyarrhythmia (paroxysmal atrial fibrillation and left atrial tachycardia), which triggered a PIT, successfully aborted by automatic mode switch...
August 2017: Oxford Medical Case Reports
https://www.readbyqxmd.com/read/29722858/catheter-ablation-of-incisional-atrial-tachycardia-using-remote-magnetic-navigation-in-patients-after-heart-surgery-comparison-between-acquired-and-congenital-heart-disease
#18
Xiao-Yu Liu, Peter Karl Jacobsen, Steen Pehrson, Xu Chen
Aims: The objectives of this study were to assess the acute and long-term outcomes of catheter ablation in incisional atrial tachycardia (IAT) using remote magnetic navigation (RMN) in patients after heart surgery. Methods and results: A total of 46 patients with IAT after heart surgery who underwent catheter ablation using RMN were included. Of these patients, 22 patients had acquired heart disease (AHD) and the remaining 24 patients had various types of congenital heart disease (CHD)...
May 1, 2018: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/29722468/comparison-of-treatment-outcomes-between-convergent-procedure-and-catheter-ablation-for-paroxysmal-atrial-fibrillation-evaluated-with-implantable-loop-recorder-monitoring
#19
Matevž Jan, David Žižek, Živa Miriam Geršak, Borut Geršak
INTRODUCTION: While catheter ablation (CA) is an established treatment for symptomatic paroxysmal atrial fibrillation (AF), convergent epicardial and endocardial ablation procedure (CVP) has been primarily used to treat persistent AF. The aim of this single-center, prospective, randomized study was to compare treatment efficacy of CA and CVP in paroxysmal AF patients by monitoring AF, atrial tachycardia (AT) and atrial flutter (AFL) recurrence with Implantable Loop Recorder (ILR). METHODS AND RESULTS: Fifty patients (74% male) with history of paroxysmal AF were randomized between CA and CVP...
May 3, 2018: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/29722189/utility-of-photoplethysmography-for-heart-rate-estimation-among-inpatients
#20
Anoop N Koshy, Jithin K Sajeev, Nitesh Nerlekar, Adam J Brown, Kevin Rajakariar, Mark Zureik, Michael C Wong, Louise Roberts, Maryann Street, Jennifer Cooke, Andrew W Teh
The accuracy of photoplethysmography (PPG) for heart rate (HR) estimation in cardiac arrhythmia is unknown. PPG-HR was evaluated in 112 hospitalised inpatients (cardiac arrhythmias (n = 60), sinus rhythm (n = 52)) using a continuous electrocardiogram monitoring as a reference standard. Strong agreement was observed in sinus rhythm HR < 100 and atrial flutter (bias 1 beat), modest agreement in sinus tachycardia (bias 24 beats) and complete heart block (bias -6 beats) and weak agreement with significant HR underestimation was seen in atrial fibrillation (bias 23 beats)...
May 2018: Internal Medicine Journal
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