39 results
Approach to ECGs - VT vs. SVT - Wide Tachycardias
DDx = VT vs. SVT with BBB
All
: - No RS complexes ... - Very broad complexes ... produce a hybrid complex ... onset of the QRS complex ... S-wave - RSR' complexes
Supraventricular Tachycardia EKG

Here’s a great ECG case of a 50-year-old lady who presented with palpitations

Her heart
Is it wide or narrow ... complex? ... see that the QRS complexes ... Tachycardia #EKG #ECG #Electrocardiogram ... #Cardiology #EKG
Causes of Tachycardia - Differential Diagnosis Algorithm
Narrow Complex - Regular:
 • Sinus tachycardia
 • Atrial flutter
Narrow Complex ... Complex - Irregular ... conduction Wide-Complex ... Pacemaker-facilitated Wide-Complex ... aberrancy Wide-Complex
Arrhythmias - Differential Diagnosis Algorithm

Bradyarrhythmia (<60 bpm)
 • Sinus Bradycardia
 • Sick Sinus Syndrome
 • SA
Complex - Regular ... Complex - Irregular ... Tachycardia - Wide Complex ... aberrancy - Wide Complex ... tachyarrhythmias #Cardiology
Tachycardia - Differential Diagnosis Framework
Narrow-Complex:
 • Regular: Sinus Tachycardia, Junctional Tachycardia, Atrial Tachycardia, Atrial Flutter, AVRT
Diagnosis Framework Narrow-Complex ... WPW), AVnRT (ie SVT ... block) Regular-Complex ... Differential #Diagnosis #cardiology ... #wide #narrow #
Tachycardia - Differential Diagnosis Table - Wide vs Narrow, Regular vs Irregular

Regular Rhythm - Narrow Complex
Complex Tachycardia ... Rhythm - Wide Complex ... Complex Tachycardia ... Rhythm - Wide Complex ... Irregular #causes #cardiology
VT versus SVT with Aberration - Interpretation Cheat Sheet

Features favouring VT
● Absence of typical RBBB or
dissociation (P and QRS complexes ... beats (hybrid complex ... negative (QS) complexes ... Brugada algorithm ... Comparison #Diagnosis #Cardiology
Lead aVR on EKG
Lead aVR can provide some unique insight into 5 different conditions:

 - Acute
overdose - AVRT in narrow ... complex tachycardias ... from SVT with aberrancy ... in wide complex ... #Diagnosis #Cardiology
Narrow Complex Tachycardias (Simplified)

Irregular Narrow Complex Tachycardia:
 1. Atrial fibrillation
	- Usually the correct answer
 2. Multifocal
Narrow Complex Tachycardias ... Complex Tachycardia ... Complex Tachycardia ... "PSVT" (atrioventricular ... diagnosis #causes #cardiology
Ventricular Tachycardia - Management Algorithm
Wide Complex Tachycardia: Rate > 100, QRS > 120
DDx: Ventricular tachycardia, SVT
Tachycardia - Management Algorithm ... Wide Complex Tachycardia ... Ventricular tachycardia, SVT ... with aberrancy, SVT ... #cardiology #VT