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Narrow Complex Tachycardia

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https://www.readbyqxmd.com/read/30283806/atrial-fibrillation-in-a-patient-with-an-accessory-pathway
#1
Andrew Silverman, Sonia Taneja, Liliya Benchetrit, Peter Makusha, Robert L McNamara, Alexander B Pine
A 24-year-old man with history of unspecified arrhythmia presented with palpitations and chest pain. Initial electrocardiogram (ECG) revealed irregular tachycardia with varying QRS width: 150 to 200 beats per minute for narrow complexes and 300 beats per minute for wide complexes. Following cardioversion, ECG revealed sinus tachycardia with a preexcitation pattern of positive delta waves in the anterolateral leads and negative delta waves in inferior leads. The patient remained in sinus rhythm and underwent successful ablation of a right posteroseptal accessory pathway...
January 2018: Journal of Investigative Medicine High Impact Case Reports
https://www.readbyqxmd.com/read/30228968/paroxysmal-1-1-narrow-complex-tachycardia-what-is-the-mechanism
#2
Jason V Garcia, Holly L Daw, Jonathan M Behar, Pier D Lambiase
No abstract text is available yet for this article.
September 2018: HeartRhythm Case Reports
https://www.readbyqxmd.com/read/30094471/electrocardiographic-criteria-of-epicardial-ventricular-tachycardia-with-anterior-origin
#3
Christopher Reithmann, Michael Fiek, Zeinab Aynur, Michael Ulbrich
BACKGROUND: ECG criteria for identifying an epicardial origin of ventricular tachycardia (VT) have mainly been described for VTs with basal-superior and lateral origin. OBJECTIVE: The aim of this study was to determine ECG criteria for epicardial VTs with anterior origin as a guide for trans-pericardial ablation. RESULTS: Among 22 patients undergoing successful ablation of VTs from the anterior myocardial wall, 14 patients underwent endocardial ablation and 8 patients underwent epicardial ablation...
August 9, 2018: Clinical Research in Cardiology: Official Journal of the German Cardiac Society
https://www.readbyqxmd.com/read/30067274/irregular-narrow-complex-tachycardia
#4
Julian Hoevelmann, Charle Viljoen, Ashley Chin
The correct differentiation of an irregular, narrow-complex tachycardia has crucial implications for the therapeutic management of these conditions. In this article we present a differential diagnostic and treatment approach to irregular, narrow-complex tachycardias.
May 2018: Cardiovascular Journal of Africa
https://www.readbyqxmd.com/read/30032471/the-low-specificity-of-low-voltage-bridges-associating-atrioventricular-nodal-reentry-in-pediatric-patients
#5
Amanda M Marshall, Christopher C Erickson, David A Danford, John D Kugler, Vincent C Thomas
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. In these scenarios, the demonstration of LVBs may be diagnostic and guide catheter ablation treatment. The purpose of our study was to prospectively investigate the specificity of LVBs as a diagnostic marker of AVNRT...
July 21, 2018: Journal of Interventional Cardiac Electrophysiology: An International Journal of Arrhythmias and Pacing
https://www.readbyqxmd.com/read/29992617/narrow-qrs-tachycardia-with-apparent-concentric-atrial-activation-pattern-what-is-the-mechanism
#6
Krishna Kumar Mohanan Nair, Narayanan Namboodiri, Hiren Kevadiya, Ajitkumar Valaparambil
No abstract text is available yet for this article.
September 2018: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/29951142/effect-of-heart-rate-and-pacing-mode-on-qrs-fragmentation
#7
Fani Zagkli, Stefanos Despotopoulos, Christos Spiliotopoulos, John Chiladakis
Background: The study was designed to investigate the effect of heart rate and pacing mode on QRS fragmentation (f-QRS). Moreover, the usefulness of f-QRS in distinguishing patients with impaired left ventricular ejection function (EF) and ventricular tachycardia (VT) from patients with normal EF was assessed. Methods: Three hundred and six recipients, with dual-chamber device, with intrinsic narrow or wide QRS complex and preserved atrioventricular conduction were grouped into normal-EF or impaired-EF VT...
June 2018: Journal of Arrhythmia
https://www.readbyqxmd.com/read/29913014/irregular-narrow-complex-tachycardia-in-the-setting-of-congenital-heart-disease
#8
Adam Oesterle, Zian H Tseng
No abstract text is available yet for this article.
August 1, 2018: JAMA Internal Medicine
https://www.readbyqxmd.com/read/29895817/when-a-pseudo-infarct-electrocardiogram-ecg-pattern-in-a-posterior-accessory-wolff-parkinson-white-pathway-masks-a-true-inferior-infarct
#9
Muhammad U Butt, Ripa Patel, Yousef H Darrat, Gustavo X Morales, Claude S Elayi
BACKGROUND Wolff-Parkinson-White (WPW) pattern is due to a pre-excitation leading to characteristic ECG changes in sinus rhythm as short PR interval, the presence of delta waves, wide QRS complexes, and potentially Q wave-T wave vector discordance (pseudo-infarct pattern). These later changes can mask the underlying ECG depolarizing solely through the His-Purkinje system. Our case highlights how the ECG of a WPW pattern with a pseudo-infarct pattern can in fact mask a true infarct on the underlying ECG without pre-excitation...
June 13, 2018: American Journal of Case Reports
https://www.readbyqxmd.com/read/29881559/pacemaker-mediated-tachycardia-with-narrow-qrs-complexes
#10
Hyun Sok Yoo, Ernesto Albino, Pablo Fernandez, Daniel Etcheverry, Rita Tepper, Hugo Garro, Julio Pastori, Rafael Acunzo
Inverted connection of the atrial and ventricular leads is an unusual circumstance during the implantation of a dual-chamber pacemaker. Yet, PMT may present in the absence of complex mechanisms. The detection and termination algorithms used by the device proved to be efficient for the adequate diagnosis and treatment.
June 2018: Clinical Case Reports
https://www.readbyqxmd.com/read/29779522/sinus-tachycardia-presenting-as-a-wide-and-narrow-complex-tachyarrhythmia-what-is-the-link
#11
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/29697168/a-narrow-complex-tachycardia-with-variable-r-r-intervals-what-is-the-mechanism
#12
Vishal Luther, Ian Wright, David Lefroy, Fu Siong Ng
No abstract text is available yet for this article.
August 2018: Journal of Cardiovascular Electrophysiology
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
#13
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/29508526/standardized-training-for-avt-pacing-in-paediatric-patients-with-postoperative-junctional-ectopic-tachycardia
#14
Andreas Entenmann, Susann Dittrich, Vera Hessling, Christian Niederwanger, Gerard Cortina, Miriam Michel
BACKGROUND: Junctional ectopic tachycardia is a serious complication of surgery for paediatric congenital heart disease. R-wave synchronized atrial (AVT) pacing, an innovative temporary pacing technique, restores atrioventricular synchrony in these patients. The method is highly effective but technically complex. A standardized training model exists for doctors but not for paediatric intensive care nurses. AIMS: This study seeks to evaluate whether a standardized programme involving simulation and vignettes increases knowledge of AVT pacing and accuracy of its documentation, as well as recognition and management of specific complications...
July 2018: Nursing in Critical Care
https://www.readbyqxmd.com/read/29506999/unusual-rhythm-behind-a-narrow-complex-tachycardia
#15
Joana Neiva, Guilherme Portugal, Sérgio Laranjo, Mário Oliveira
No abstract text is available yet for this article.
March 6, 2018: Circulation
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
#16
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/29319439/successful-management-of-minoxidil-toxicosis-in-a-dog
#17
Tyler J M Jordan, Page E Yaxley, Christine A Culler, Anusha Balakrishnan
CASE DESCRIPTION A 2-year-old sexually intact female mixed-breed dog was evaluated at an emergency hospital approximately 5 hours after ingestion of an unknown amount of over-the-counter topical hair growth promoter containing 5% minoxidil foam. Vomiting and signs of lethargy were reported by the owner, and physical examination revealed tachycardia and hypotension. No treatments were performed, and the dog was transferred to a veterinary referral hospital for management of suspected minoxidil toxicosis. CLINICAL FINDINGS On arrival at the referral hospital, the dog was tachycardic (heart rate, 200 to 220 beats/min) and hypotensive (systolic arterial blood pressure, 70 mm Hg)...
January 15, 2018: Journal of the American Veterinary Medical Association
https://www.readbyqxmd.com/read/29319207/wide-to-narrow-complex-tachycardia-what-is-the-diagnosis
#18
Manojkumar Rohit, Darshan Krishnappa, Raja J Selvaraj
No abstract text is available yet for this article.
March 2018: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/29259660/postoperative-narrow-complex-tachycardia-presenting-with-low-cardiac-output
#19
Priyadarshini Arunakumar, Krishna Kumar Mohanan Nair, Ajitkumar Valaparambil
No abstract text is available yet for this article.
2017: Heart Asia
https://www.readbyqxmd.com/read/29239759/alternative-treatment-options-for-atrioventricular-nodal-reentry-tachycardia-an-emergency-medicine-review
#20
REVIEW
Sarah Brubaker, Brit Long, Alex Koyfman
BACKGROUND: Atrioventricular-nodal-reentry tachycardia (AVNRT) is a form of supraventricular tachycardia (SVT) that is relatively common in the emergency department (ED). It is rarely indicative of underlying electrical or structural pathology. OBJECTIVE: This review evaluates the literature and controversies concerning treatment of AVNRT in the ED. DISCUSSION: For treatment of narrow-complex tachycardia, Advanced Cardiovascular Life Support guidelines recommend the use of vagal maneuvers, followed by adenosine...
February 2018: Journal of Emergency Medicine
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