Narrow QRS Complex Tachycardias

2007 ◽  
Vol 18 (3) ◽  
pp. 264-274
Author(s):  
Carol Jacobson
Keyword(s):  
Rate Control ◽  
Accessory Pathway ◽  
Ventricular Rate ◽  
Channel Blockers ◽  
Qrs Complex ◽  
Av Node ◽  
Narrow Qrs ◽  
Circus Movement ◽  
Narrow Qrs Complex ◽  
Reentry Tachycardia

Narrow QRS complex tachycardias are either atrioventricular (AV) nodal passive or AV nodal active. AV nodal passive tachycardias do not require the participation of the AV node in maintenance of the tachycardia. Examples are atrial tachycardia, atrial flutter, and atrial fibrillation. Treatment is directed at ventricular rate control with calcium channel blockers or β-blockers. AV nodal active tachycardias require active participation of the AV node in maintaining the tachycardia. Examples include AV nodal reentry tachycardia and circus movement tachycardia using an accessory pathway. Treatment with a vagal maneuver or adenosine usually terminates the tachycardia. Recognition of these tachycardias is reviewed.

Supraventricular (narrow complex) tachycardias

2019 ◽  
pp. 209-220
Author(s):  
Julio Martí-Almor
Keyword(s):  
Antiarrhythmic Drugs ◽  
Accessory Pathway ◽  
Atrioventricular Node ◽  
Term Treatment ◽  
Qrs Complex ◽  
Emergency Situations ◽  
Narrow Qrs ◽  
Long Term Treatment ◽  
Narrow Qrs Complex ◽  
Excitation Pattern

Supraventricular tachycardia (SVT) includes all tachycardia rhythms (more than 100 bpm), of which the mechanism involves the His Bundle or tissues above it. Usually, these tachyarrhythmias present a narrow QRS complex (except in the presence of a bundle branch block or a manifest accessory pathway which conducts anterogradely to cause a ventricular pre-excitation pattern on the electrocardiogram). This chapter only focuses on narrow QRS complex SVT involving the atrial tissue, the atrioventricular node, and accessory pathways. Atrial fibrillation and atrial flutter are excluded because they are specifically covered in other chapters. The role of antiarrhythmic drugs in SVTs is mainly restricted to acute situations because ablative therapy has surrogate pharmacotherapy and ablation is considered the best long-term treatment for most cases. Nevertheless, it is very important to know how to deal with antiarrhythmic drugs in emergency situations.

Atrioventricular re-entrant tachycardia

2018 ◽  
Author(s):  
Michael Jones ◽  
Norman Qureshi ◽  
Kim Rajappan
Keyword(s):  
Supraventricular Tachycardia ◽  
Electrical Conduction ◽  
Qrs Complex ◽  
Av Node ◽  
Paroxysmal Tachycardia ◽  
Electrical Connection ◽  
Purkinje System ◽  
Narrow Qrs ◽  
Narrow Qrs Complex

Atrioventricular (AV) re-entrant tachycardia (AVRT) is a type of supraventricular tachycardia, manifesting most commonly as a regular, narrow-QRS-complex tachycardia. It is usually a paroxysmal tachycardia, and is dependent upon the presence of an accessory electrical connection located between the atria and the ventricles (distinct and separate from the AV node–His–Purkinje system) and which is capable of atrioventricular (antegrade) or ventriculoatrial (retrograde) electrical conduction (or both). This pathway, together with the AV node–His–Purkinje system and the atrial and ventricular myocardia, forms a macro-re-entrant circuit which enables AVRT to occur.

Supraventricular (narrow complex) tachycardias

2019 ◽  
pp. 209-220
Author(s):  
Julio Martí-Almor
Keyword(s):  
Antiarrhythmic Drugs ◽  
Accessory Pathway ◽  
Atrioventricular Node ◽  
Term Treatment ◽  
Qrs Complex ◽  
Emergency Situations ◽  
Narrow Qrs ◽  
Long Term Treatment ◽  
Narrow Qrs Complex ◽  
Excitation Pattern

Supraventricular tachycardia (SVT) includes all tachycardia rhythms (more than 100 bpm), of which the mechanism involves the His Bundle or tissues above it. Usually, these tachyarrhythmias present a narrow QRS complex (except in the presence of a bundle branch block or a manifest accessory pathway which conducts anterogradely to cause a ventricular pre-excitation pattern on the electrocardiogram). This chapter only focuses on narrow QRS complex SVT involving the atrial tissue, the atrioventricular node, and accessory pathways. Atrial fibrillation and atrial flutter are excluded because they are specifically covered in other chapters. The role of antiarrhythmic drugs in SVTs is mainly restricted to acute situations because ablative therapy has surrogate pharmacotherapy and ablation is considered the best long-term treatment for most cases. Nevertheless, it is very important to know how to deal with antiarrhythmic drugs in emergency situations.

Narrow QRS complex tachycardia with a 2:1 atrioventricular block: What is the mechanism

2021 ◽  
Author(s):  
Yuichiro Miyazaki ◽  
Takashi Noda ◽  
Koji Miyamoto ◽  
Satoshi Nagase ◽  
Takeshi Aiba ◽  
...  
Keyword(s):  
Atrioventricular Block ◽  
Qrs Complex ◽  
Narrow Qrs ◽  
Narrow Qrs Complex

scholarly journals Tachycardia cycle length alternans during a narrow QRS complex tachycardia with eccentric retrograde atrial activation sequence: What is the mechanism?

2020 ◽  
Vol 36 (1) ◽  
pp. 209-210
Author(s):  
Meryem Kara ◽  
Ahmet Korkmaz ◽  
Emin Karimli ◽  
Evrim Simsek ◽  
Ozcan Ozeke ◽  
...  
Keyword(s):  
Cycle Length ◽  
Qrs Complex ◽  
Narrow Qrs ◽  
Narrow Qrs Complex ◽  
Atrial Activation ◽  
Activation Sequence

scholarly journals Efficacy of Cardiac Resynchronization Therapy in Patients with a Narrow QRS Complex

2021 ◽  
Vol 2021 ◽  
pp. 1-7
Author(s):  
Toshiko Nakai ◽  
Yukitoshi Ikeya ◽  
Hiroaki Mano ◽  
Rikitake Kogawa ◽  
Ryuta Watanabe ◽  
...  
Keyword(s):  
Cardiac Resynchronization Therapy ◽  
Response Rate ◽  
Nyha Class ◽  
Heart Association ◽  
Cardiac Resynchronization ◽  
Qrs Complex ◽  
Resynchronization Therapy ◽  
Narrow Qrs ◽  
Narrow Qrs Complex ◽  
Crt Response

Aims. In the guidelines for cardiac resynchronization therapy (CRT), there is a gap between the Japanese Circulation Society (JCS) criteria, which specify a QRS duration of ≥120 ms, and other countries, with a QRS ≥ 130 ms. The efficacy of CRT remains controversial in patients with a narrow QRS <130 ms. The aims of this study are to evaluate the response to CRT in patients with a narrow QRS and to identify predictors of mortality. Methods. We retrospectively studied 212 patients who received CRT. They were divided into narrow QRS (<130 ms) and wide QRS (≥130 ms) groups. We compared CRT response rates and investigated whether age, gender, baseline New York Heart Association (NYHA) class, ischemic etiology, atrial fibrillation, and ventricular arrhythmias are associated with response and also predictive of mortality. Results. The CRT response rate was not significantly different between the wide QRS group and the narrow QRS group (74.6% versus 77.2%, p  = 0.6876), and the response rate in the narrow QRS group was as good as that reported worldwide. NYHA class IV was shown to be a predictor of mortality (HR 9.38, 95% CI 5.35–16.3, p  < 0.0001). Conclusions. The present study demonstrated that patients with a narrow QRS complex responded well to CRT. Even with QRS <130 ms, CRT should be tried if no other effective treatment is available.

Narrow QRS complex in idiopathic (fascicular) left ventricular tachycardia

Herz ◽  
2013 ◽  
Vol 40 (1) ◽  
pp. 147-149 ◽  
Author(s):  
S. Paraskevaidis ◽  
E.K. Theofilogiannakos ◽  
D.M. Konstantinou ◽  
L. Mantziari ◽  
C. Kefalidis ◽  
...  
Keyword(s):  
Ventricular Tachycardia ◽  
Left Ventricular ◽  
Qrs Complex ◽  
Narrow Qrs ◽  
Narrow Qrs Complex
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