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Wide QRS 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/29759535/utility-of-conventional-electrocardiographic-criteria-in-patients-with-idiopathic-ventricular-tachycardia
#2
Anil V Yadav, Babak Nazer, Barbara J Drew, John M Miller, Hicham El Masry, William J Groh, Andrea Natale, Nassir Marrouche, Nitish Badhwar, Yanfei Yang, Melvin M Scheinman
OBJECTIVES: This study sought to determine the ability of conventional electrocardiographic (ECG) criteria to correctly differentiate idiopathic ventricular tachycardia (VT) from supraventricular tachycardia (SVT) with aberrancy. BACKGROUND: Previously reported VT ECG criteria were developed from cohorts of patients with structural heart disease and have not been applied to patients with idiopathic VT. METHODS: ECGs of 115 idiopathic VTs, 101 post-myocardial infarction (MI) VTs, and 111 wide QRS SVTs were analyzed using standard criteria...
July 2017: JACC. Clinical Electrophysiology
https://www.readbyqxmd.com/read/29749082/effect-of-induced-chronic-atrial-fibrillation-on-exercise-performance-in-standardbred-trotters
#3
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/29727501/a-wide-complex-tachycardia-with-atypical-right-bundle-branch-block-qrs-morphology-what-is-the-mechanism
#4
Tam Tsz Kin, Joseph Y S Chan, George J Klein
No abstract text is available yet for this article.
May 4, 2018: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/29676823/wide-qrs-tachycardia-with-right-bundle-branch-block-qrs-morphology-that-is-almost-identical-to-that-during-sinus-rhythm-what-is-the-mechanism
#5
Yasushi Wakabayashi, Takekuni Hayashi, Yoshitaka Sugawara, Takeshi Mitsuhashi, Hideo Fujita, Shin-Ichi Momomura
No abstract text is available yet for this article.
April 20, 2018: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/29622376/mahaim-fiber-mediated-tachycardia
#6
Gustavo Lima da Silva, Nuno Cortez-Dias, Ana Bernardes, João Sousa
We present the case of a previously healthy 42-year-old man who attended the emergency department due to a sudden onset of rapid and regular palpitations. The ECG showed 190 bpm, wide QRS with left bundle branch block tachycardia. He was started on amiodarone with progression to 230 bpm, wide QRS tachycardia with multiple morphologies, followed by spontaneous conversion to sinus rhythm, normal PR interval and rS pattern in LIII. The echocardiogram was negative for structural heart disease. The electrophysiological study demonstrated the presence of an accessory pathway with anterograde decremental conduction and no retrograde conduction...
April 2, 2018: Portuguese Journal of Cardiology: An Official Journal of the Portuguese Society of Cardiology
https://www.readbyqxmd.com/read/29581367/wide-qrs-complex-tachycardia-what-the-algorithms-fear
#7
Alberto Vera, Alberto Cecconi, Maria Teresa Nogales-Romo, Francisco de la Cuerda, Jorge Salamanca, Luis Jesus Jimenez-Borreguero, Fernando Alfonso
No abstract text is available yet for this article.
March 27, 2018: Circulation
https://www.readbyqxmd.com/read/29550833/a-case-of-lown-ganong-levine-syndrome-due-to-an-accessory-pathway-of-james-fibers-or-enhanced-atrioventricular-nodal-conduction-eavnc
#8
Juanita Hunter, Emmanouil Tsounias, John Cogan, Ming-Lon Young
BACKGROUND Lown-Ganong-Levine syndrome, includes a short PR interval, normal QRS complex, and paroxysmal tachycardia. The pathophysiology of this syndrome includes an accessory pathway connecting the atria and the atrioventricular (AV) node (James fiber), or between the atria and the His bundle (Brechenmacher fiber). Similar features are seen in enhanced atrioventricular nodal conduction (EAVNC), with the underlying pathophysiology due to a fast pathway to the AV node, and with the diagnosis requiring specific electrophysiologic criteria...
March 18, 2018: American Journal of Case Reports
https://www.readbyqxmd.com/read/29538207/case-report-an-unstable-wide-qrs-complexes-tachycardia-after-ablation-of-a-poster-septal-accessory-pathway-what-is-the-mechanism
#9
Huan Wang, Xiaoru Che
INTRODUCTION: Differentiation of wide QRS complex tachycardia required repeated electrophysiological stimuli and mapping. However, instability of tachycardia would increase the difficulty in differential diagnosis. SYMPTOMS AND CLINICAL FINDINGS: In this paper, we reported a wide QRS tachycardia following ablation of an atrioventricular reentrant tachycardia participated by a poster-septal accessory pathway. Limited differentiation strategy was performed because the wide QRS tachycardia was self-limited and with unstable hemodynamics...
March 2018: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29501127/a-66-year-old-man-with-a-wide-qrs-tachycardia
#10
Hein J Wellens
No abstract text is available yet for this article.
March 2018: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/29442383/atrial-overdrive-pacing-during-lbbb-tachycardia-what-is-the-mechanism
#11
Krishna Kumar Mohanan Nair, Narayanan Namboodiri, Hiren Kevadiya, Ajitkumar Valaparambil
No abstract text is available yet for this article.
April 2018: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/29442199/multisite-cardiac-resynchronization-therapy-for-traditional-and-non-traditional-indications
#12
Avishag Laish-Farkash, Sharon Bruoha, Vladimir Khalameizer, Chaim Yosefy, Yoav Michowitz, Mahmoud Suleiman, Amos Katz
PURPOSE: Multisite cardiac resynchronization therapy (MSCRT) with dual-vein left ventricular (LV) pacing has theoretical advantages over conventional CRT in faster and more physiological LV activation. We aimed to define indications, feasibility, safety, acute, and long-term results of MSCRT. METHODS: All patients implanted with MSCRT during 2008-2014 in a single center were reviewed and analyzed. RESULTS: Thirty-nine patients (90% CRT-defibrillators, 64 ± 9 years, 85% male, 74% ischemic etiology) were included...
March 2018: Journal of Interventional Cardiac Electrophysiology: An International Journal of Arrhythmias and Pacing
https://www.readbyqxmd.com/read/29405949/unusual-termination-of-a-wide-qrs-tachycardia
#13
Hein J Wellens
No abstract text is available yet for this article.
February 2018: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/29391388/a-patient-with-left-bundle-branch-block-and-persistent-atrial-fibrillation-treated-with-cardiac-catheter-ablation-and-pharmacologic-cardiac-resynchronization-therapy-without-the-use-of-an-implantable-cardiac-device
#14
Hideyuki Hasebe
BACKGROUND Left bundle branch block (LBBB) is associated with atrial fibrillation (AF) and systolic heart failure, which can be treated with cardiac resynchronization therapy (CRT) that includes an implantable cardiac device (ICD). However, in some patients, LBBB may vary with heart rate, and during episodes of AF in LBBB, aberrant ventricular conduction, or wide QRS complex tachycardia (Ashman beats) can occur. This report is a case of LBBB treated with pharmacologic CRT, without the use of an ICD. CASE REPORT A 68-year-old man presented with persistent AF and systolic heart failure...
February 2, 2018: American Journal of Case Reports
https://www.readbyqxmd.com/read/29328513/wide-qrs-complex-tachycardia-followed-by-2-1-atrioventricular-block-what-is-the-mechanism
#15
Jesús Jiménez-López, Ermengol Vallès, Begoña Benito Villabriga, Oscar Alcalde, Sandra Cabrera, Julio Martí-Almor
No abstract text is available yet for this article.
January 12, 2018: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/29319205/an-unexpected-cause-of-wide-qrs-tachycardia-in-a-young-woman
#16
Hussam Ali, Guido De Ambroggi, Sara Foresti, Riccardo Cappato
No abstract text is available yet for this article.
January 10, 2018: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/29304037/influence-of-advancing-age-on-clinical-presentation-treatment-efficacy-and-safety-and-long-term-outcome-of-inducible-paroxysmal-supraventricular-tachycardia-without-pre-excitation-syndromes-a-cohort-study-of-1960-patients-included-over-25-years
#17
Béatrice Brembilla-Perrot, Jean Marc Sellal, Arnaud Olivier, Thibaut Villemin, Daniel Beurrier, Julie Vincent, Vladimir Manenti, Christian de Chillou, Erwan Bozec, Nicolas Girerd
AIM: To investigate the influence of increasing age on clinical presentation, treatment and long-term outcome in patients with inducible paroxysmal supraventricular tachycardia (SVT) without pre-excitation syndromes. METHODS: Clinical and electrophysiological study (EPS) data, as well as long-term clinical outcome (mean follow-up 2.4±4.0 years) were collected in patients referred for regular tachycardia with inducible SVT during EPS without pre-excitation. RESULTS: Among 1960 referred patients, 301 patients (15...
2018: PloS One
https://www.readbyqxmd.com/read/29289261/r-wave-peak-time-at-lead-ii-in-adults-with-ventricular-premature-beats-bundle-branch-block-and-left-anterior-fascicular-block
#18
Min Yu, Tingting Chen, Shuang Hu, Shan Zou, Cantian Wang, Chujuan Zeng, Weijie Chen, Xuerui Tan
BACKGROUND: Recently, the R-wave peak time (RWPT) at lead II was reported to be a helpful and simple tool for differentiating wide QRS complex tachycardias with a RWPT ≥ 50ms for ventricular tachycardia diagnosis. Our previous study showed that the duration of RWPT at lead II in adults was ≈29ms. However, the effects of ventricular premature beats (VPBs), bundle branch block (BBB) or left anterior fascicular block (LAFB) on RWPT at lead II remain unknown. METHODS: The study was conducted in the First Affiliated Hospital of Shantou University Medical College in Southern China...
January 2018: American Journal of the Medical Sciences
https://www.readbyqxmd.com/read/29226343/wide-qrs-tachycardia-with-rbbb-morphology-right-inferior-quadrant-axis-and-1-1-av-relation-what-is-the-mechanism
#19
Krishna Kumar Mohanan Nair, Narayanan Namboodiri, Sreevilasam Pushpangadhan Abhilash, Ajitkumar Valaparambil
No abstract text is available yet for this article.
December 11, 2017: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/29132651/wide-qrs-complex-tachycardia
#20
Elias B Hanna, Colleen J Johnson, D Luke Glancy
In a man with a wide-QRS complex tachycardia, a history of an inferior left ventricular scar, atrioventricular dissociation during the tachycardia, and a QRS morphology inconsistent with right or left bundle branch block exclude a diagnosis of supraventricular tachycardia with aberrant ventricular conduction due to bundle branch block or ventricular preexcitation and establish a diagnosis of ventricular tachycardia.
January 15, 2018: American Journal of Cardiology
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