Read by QxMD icon Read

entrainment tachycardia

Michael Ghannam, Hubert Cochet, Pierre Jais, Maxime Sermesant, Smita Patel, Konstantinos C Siontis, Fred Morady, Frank Bogun
BACKGROUND: Myocardial wall thickness (WT) in patients with a prior myocardial infarction has been used to indicate scarring. However, the correlation of WT with sites critical to ventricular tachycardia (VT) has not been previously investigated. The purpose of this study was to correlate electroanatomic mapping data obtained during VT ablation with WT determined by cardiac computed tomography (CT). METHODS AND RESULTS: Cardiac CTs were performed in 15 consecutive patients (mean age 63±10 years, 86% male, left ventricular ejection fraction 27±12%) with a prior infarct referred for VT ablation...
January 30, 2018: Journal of Cardiovascular Electrophysiology
S Honarbakhsh, R J Hunter, G Dhillon, W Ullah, E Keating, R Providencia, A Chow, M J Earley, R J Schilling
INTRODUCTION: This study sought to validate a novel wavefront mapping system utilizing whole-chamber basket catheters (CARTOFINDER, Biosense Webster). The system was validated in terms of (1) mapping atrial-paced beats and (2) mapping complex wavefront patterns in atrial tachycardia (AT). METHODS AND RESULTS: Patients undergoing catheter ablation for AT and persistent AF were included. A 64-pole-basket catheter was used to acquire unipolar signals that were processed by CARTOFINDER mapping system to generate dynamic wavefront propagation maps...
January 24, 2018: Journal of Cardiovascular Electrophysiology
Robert H Pass, Leonardo Liberman, Eric S Silver, Christopher M Janson, Andrew D Blaufox, Lynn Nappo, Scott R Ceresnak
BACKGROUND: Concealed left-sided accessory pathways (CLAP) are a cause of supraventricular tachycardia (SVT) in the young. Most are mapped with right ventricular (RV) apical/outflow pacing. Rarely, alternative means of mapping are required. We review our experience from three pediatric electrophysiology (EP) centers with a rare form of "hidden" CLAP. METHODS: All patients <21 years undergoing EP study from 2008 to 2014 with a "hidden" CLAP (defined as an accessory pathway [AP] for which RV pacing at cycle lengths [CL] stable for mapping did not demonstrate eccentric retrograde conduction) were included...
January 12, 2018: Pacing and Clinical Electrophysiology: PACE
David Calvo, Diego Pérez, José Rubín, Daniel García, Pablo Ávila, F Javier García-Fernández, Marta Pachón, Loreto Bravo, Jesús Hernández, Ángel L Miracle, Irene Valverde, Mar Gozalez-Vasserot, Miguel Ángel Árias, Javier Jimenez-Candíl, César Morís
Aims: Tachycardia mediated by septal accessory pathways (AP) and atypical atrioventricular nodal re-entry (AVNRT) require careful electrophysiologic evaluation for differential diagnosis. We aim to describe the differential behaviour of local ventriculo-atrial (VA) intervals which predicts the tachycardia mechanism. Methods and results: The local VA intervals at the para-Hisian septum were measured under three different situations: (i) tachycardia; (ii) sustained entrainment from the right ventricular apex (RVA); and (iii) continuous pacing from the RVA during sinus rhythm...
January 2, 2018: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
Kivanc Yalin, Ebru Golcuk, Ekrem Bilal Karaayvaz, Tolga Aksu, Muhammet Arslane, Selma Kenar Tiryakioglu, Ahmet Kaya Bilge, Kamil Adalet
Introduction: Failure to differentiate supraventricular from ventricular arrhythmias is the most frequent cause of inappropriate implantable cardioverter-defibrillator (ICD) therapies. We hypothesized that the postpacing interval (PPI) after overdrive right ventricular pacing may differentiate ventricular (VT) from supraventricular tachycardia (SVT) such as sinus tachycardia, atrial flutter and atrial tachycardia. This hypothesis is based on the entrainment maneuver. Reentrant tachycardia circuit for VTs would haveshorter distance to RV apex than SVTs have, and the conduction time between a ventricular pacing site and the tachycardia origin is expected to be shorter in VTs than in SVTs...
August 2017: Journal of Atrial Fibrillation
Sachin Nayyar, Lauren Wilson, Anand Ganesan, Thomas Sullivan, Pawel Kuklik, Glenn Young, Prashanthan Sanders, Kurt C Roberts-Thomson
PURPOSE: Protected channels of surviving myocytes in late postinfarction ventricular scar predispose to ventricular tachycardia (VT). However, only a few patients develop VT spontaneously. We studied differences in electric remodeling and protected channels in late postinfarction patients with and without spontaneous VT. METHODS: Patients with ischemic cardiomyopathy (ICM) with recurrent sustained monomorphic VT (n = 22) were compared with stable ICM patients without spontaneous VT (control group; n = 5)...
January 2018: Journal of Interventional Cardiac Electrophysiology: An International Journal of Arrhythmias and Pacing
Masateru Takigawa, Nicolas Derval, Antonio Frontera, Ruairidh Martin, Seigo Yamashita, Ghassen Cheniti, Konstantinos Vlachos, Nathaniel Thompson, Takeshi Kitamura, Michel Wolf, Gregoire Massoullie, Clair Martin, Nora Al-Jefairi, Sana Amraoui, Josselin Duchateau, Nicolas Klotz, Thomas Pambrun, Arnaud Denis, Frederic Sacher, Hubert Cochet, Hocini Meleze, Michel Haissaguierre, Pierre Jais
BACKGROUND: Anatomic macroreentrant atrial tachycardias (MATs) are conventionally reported to depend on the cavotricuspid isthmus, the mitral isthmus, or the left atrial roof, and are commonly seen following catheter ablation for atrial fibrillation. OBJECTIVES: To define the precise circuits of anatomic MAT with ultrahigh-resolution mapping. METHODS: In 57 patients (mean age, 62 years; 10 female) who developed ≥1 anatomic MAT, we analyzed 88 MAT circuits including 16 peritricuspid, 42 perimitral, and 30 roof-dependent circuits, using high-density mapping and entrainment...
November 22, 2017: Heart Rhythm: the Official Journal of the Heart Rhythm Society
Krishna Kumar Mohanan Nair, Anees Thajudeen, Narayanan Namboodiri, Ajitkumar Valaparambil
A 30year old patient presented to us with recurrent episodes of palpitation and documented tachycardia. In all his presentations a wide QRS tachycardia was recorded. The baseline ECG showed pre excitation. The 12 lead ECG of the tachycardia and the baseline ECG is shown in Fig. 1A. During EP study the patient had baseline pre excitation and the HV interval was 16 ms. A duo-decapolar halo (HL) catheter was used to map right atrium and a decapolar coronary sinus (CS) catheter was used to map coronary sinus...
March 2017: Indian Pacing and Electrophysiology Journal
Osamu Inaba, Yasutoshi Nagata, Yasuteru Yamauchi, Takamichi Miyamoto, Masahiko Goya, Kenzo Hirao
This report presents a verapamil-sensitive atrial tachycardia, mid-atrium septum activating the earliest. Concealed entrainment was obtained at noncoronary aortic sinus (NCS), where the local activation was delayed compared to mid-septum. The tachycardia was successfully ablated at NCS. The entrance of the slow conduction zone was located at NCS.
October 2017: Clinical Case Reports
Benjamin Schaeffer, William G Stevenson
Entrainment mapping enables the diagnosis and characterization of reentrant arrhythmias from analysis of the specific interaction between pacing maneuvers and tachycardia. Described 40 years ago, the implementation and interpretation of pacing maneuvers to entrain tachycardias has evolved into an indispensible tool for diagnosis and mapping reentrant cardiac arrhythmias. For complex re-entry pathways entrainment mapping allows determination of the relation of pacing sites to the re-entry circuit and discrimination of relevant re-entry parts from bystander areas...
September 22, 2017: Journal of Cardiovascular Electrophysiology
Antonis S Manolis
Atrial flutter (AFlu) is usually a fast (>240 bpm) and regular right atrial macroreentrant tachycardia, with a constrained critical region of the reentry circuit located at the cavotricuspid isthmus (CTI; typical CTI-dependent AFlu). However, a variety of right and left atrial tachycardias, resulting from different mechanisms, can also present as AFlu (atypical non-CTI-dependent AFlu). The electrocardiogram can provide clues to its origin and location; however, additional entrainment and more sophisticated electroanatomical mapping techniques may be required to identify its mechanism, location, and target area for a successful ablation...
November 2017: Cardiology in Review
Vishal Luther, Nuno Cortez-Dias, Luís Carpinteiro, João de Sousa, Richard Balasubramaniam, Sharad Agarwal, David Farwell, Mark Sopher, Girish Babu, Richard Till, Nikki Jones, Stuart Tan, Anthony Chow, Martin Lowe, Jem Lane, Naveen Pappachan, Nicholas Linton, Prapa Kanagaratnam
BACKGROUND: Ripple mapping (RM) displays electrograms as moving bars over a three-dimensional surface displaying bipolar voltage, and has shown in a single-center series to be effective for atrial tachycardia (AT) mapping without annotation of local activation time or window-of-interest assignment. We tested the reproducibility of these findings in operators naïve to RM, using it for the first time in postablation AT. METHODS: Maps were collected with multielectrode catheters and CARTO ConfiDENSE...
November 2017: Journal of Cardiovascular Electrophysiology
Tina Baykaner, Junaid A B Zaman, Albert J Rogers, Rachita Navara, Mahmood AlHusseini, Ryan T Borne, Shirley Park, Paul J Wang, David E Krummen, William H Sauer, Sanjiv M Narayan
INTRODUCTION: Atrial fibrillation (AF) often converts to and from atrial tachycardia (AT), but it is undefined if these rhythms are mechanistically related in such patients. We tested the hypothesis that critical sites for AT may be related to regional AF sources in patients with both rhythms, by mapping their locations and response to ablation on transitions to and from AF. METHODS: From 219 patients undergoing spatial mapping of AF prior to ablation at 3 centers, we enrolled 26 patients in whom AF converted to AT by ablation (n=19) or spontaneously (n=7; left atrial size 42±6cm, 38% persistent AF)...
December 1, 2017: International Journal of Cardiology
Bhupesh Pathik, Geoffrey Lee, Chrishan Nalliah, Stephen Joseph, Joseph B Morton, Paul B Sparks, Prashanthan Sanders, Peter M Kistler, Jonathan M Kalman
BACKGROUND: With the recent advent of high-density (HD) 3-dimensional (3D) mapping, the utility of entrainment is uncertain. However, the limitations of visual representation and interpretation of these high-resolution 3D maps are unclear. OBJECTIVE: The purpose of this study was to determine the strengths and limitations of both HD 3D mapping and entrainment mapping during mapping of right atrial macroreentry. METHODS: Fifteen patients were studied...
October 2017: Heart Rhythm: the Official Journal of the Heart Rhythm Society
Yoshiaki Kaneko, Tadashi Nakajima, Tadanobu Irie, Takashi Iizuka, Shuntaro Tamura, Masahiko Kurabayashi
BACKGROUND: The atrial and ventricular response observed immediately after cessation of ventricular induction/entrainment pacing is commonly analyzed to discriminate atrial tachycardia from other supraventricular tachycardias during electrophysiologic studies. However, the response in fast-slow atrioventricular nodal reentrant tachycardia (F/S-AVNRT) remains poorly investigated. OBJECTIVE: The purpose of this study was to analyze the atrial and ventricular activation patterns after ventricular pacing in F/S-AVNRT...
November 2017: Heart Rhythm: the Official Journal of the Heart Rhythm Society
Hongwu Chen, Bing Yang, Weizhu Ju, Fengxiang Zhang, Gang Yang, Kai Gu, Mingfang Li, Hailei Liu, Zidun Wang, Kejiang Cao, Minglong Chen
BACKGROUND: Right atrial tachycardia (AT) is a common arrhythmia postsurgical valve replacement in patients with rheumatic heart disease (RHD). However, the substrate and the mechanism of left AT in such patients and the ablation efficacy is less known. METHODS AND RESULTS: Twenty-seven RHD patients with AT were enrolled in this study; nine of them (33%) had left AT. Five and four patients had left AT during the first and second procedure, respectively. A spontaneous scar in the left posterior wall was identified in all patients, and obvious anterior scar in three patients...
August 2017: Pacing and Clinical Electrophysiology: PACE
Bhupesh Pathik, Geoffrey Lee, Frédéric Sacher, Michel Haïssaguerre, Pierre Jaïs, Grégoire Massoullié, Nicolas Derval, Prashanthan Sanders, Peter Kistler, Jonathan M Kalman
BACKGROUND: Evidence for epicardial-endocardial breakthrough (EEB) is derived from mapping inferences in patients with atrial fibrillation who may also have focal activations. OBJECTIVE: The purpose of this study was to investigate whether EEB could be discerned during stable right atrial (RA) macroreentry using high-density high-spatial resolution 3-dimensional mapping. METHODS: Macroreentry was diagnosed using 3-dimensional mapping and entrainment...
May 4, 2017: Heart Rhythm: the Official Journal of the Heart Rhythm Society
Roderick Tung
No abstract text is available yet for this article.
April 2017: Circulation. Arrhythmia and Electrophysiology
Michał Orczykowski, Paweł Derejko, Piotr Urbanek, Robert Bodalski, Katarzyna Kodziszewska, Radosław Sierpiński, Rafał Baranowski, Maria Bilińska, Łukasz Szumowski
BACKGROUND: Re-entrant atrial arrhythmias are common in patients after cardiac surgery. To date, however, no studies have reported the safety and efficacy of radiofrequency (RF) ablation of macro-re-entrant atrial arrhythmias in a unique, homogeneous group of patients after surgical replacement of the aortic valve and single right atriotomy. METHODS: Among over 4,000 RF catheter ablations performed at the authors' center between 2008 and 2014, eight patients (seven males, one female; mean age 55...
September 2016: Journal of Heart Valve Disease
Krishna Kumar Mohanan Nair, Narayanan Namboodiri, Anees Thajudeen, Krishna Chaitanya, Sreevilasam Pushpangadhan Abhilash, Ajitkumar Valaparambil
No abstract text is available yet for this article.
June 2017: Journal of Cardiovascular Electrophysiology
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"