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Morphological Criteria for Discriminating Ventricular Tachycardia from Supraventricular Tachycardia with Aberration

Source Article: Wide Complex Tachycardia –
Morphological Criteria ... Supraventricular Tachycardia ... : Wide Complex Tachycardia ... Distinguishing #Criteria ... Electrocardiogram #VTach #SVT
Lead aVR on EKG
Lead aVR can provide some unique insight into 5 different conditions:

 - Acute
narrow complex tachycardias ... from SVT with aberrancy ... in wide complex tachycardias ... using the Vereckei criteria ... better than Brugada criteria
Tachycardia - Differential Diagnosis Table - Wide vs Narrow, Regular vs Irregular

Regular Rhythm - Narrow Complex
Tachycardia - Differential ... : • ST vs SVT ... • HyperK vs VT ... > SVT+conduction ... Don't rely on criteria
Lead AVR on ECG
1. Acute myocardial infarction: ST elevation > 1.5 mm in aVR, indicative of
findings: Sinus tachycardia ... Narrow complex tachycardia ... tachycardia (SVT ... • Vereckei criteria ... than Brugada criteria
Ventricular Tachycardia - Management Algorithm
Wide Complex Tachycardia: Rate > 100, QRS > 120
DDx: Ventricular tachycardia, SVT
Ventricular Tachycardia ... Wide Complex Tachycardia ... DDx: Ventricular tachycardia ... , SVT with aberrancy ... , SVT iso Na channel
Supraventricular Tachycardias - Pathophysiology
Conduction pathways through SA Node, Atrium, AV Node, Bundle of His, and Ventricle
Supraventricular Tachycardias ... • Atrial Tachycardia ... Nodal Reentry Tachycardia ... • AV Reentry Tachycardia ... Pathophysiology #SVT
Tachycardia - Differential Diagnosis Framework
Narrow-Complex:
 • Regular: Sinus Tachycardia, Junctional Tachycardia, Atrial Tachycardia, Atrial Flutter, AVRT
Tachycardia - Differential ... WPW), AVnRT (ie SVT ... Antidromic AVRT, SVT ... Irregular: Polymorphic VT ... Any irregular SVT
Wide Complex Tachycardia - Differential Diagnosis Algorithm
Irregular
 • Polymorphic VT
    - Torsades
Wide Complex Tachycardia ... Mimickers - SVT ... - V-Paced Tachycardia ... - SVT with ... #WideComplex #Tachycardia
Narrow Complex Tachycardias (Simplified)

Irregular Narrow Complex Tachycardia:
 1. Atrial fibrillation
	- Usually the correct answer
 2. Multifocal
Narrow Complex Tachycardias ... Narrow Complex Tachycardia ... Narrow Complex Tachycardia ... Sinus tachycardia ... "PSVT" (atrioventricular
Causes of Tachycardia - Differential Diagnosis Algorithm
Narrow Complex - Regular:
 • Sinus tachycardia
 • Atrial flutter
Causes of Tachycardia ... • Regular SVT ... QRS • Regular SVT ... • Irregular SVT ... • Irregular SVT