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Hallmark ECG features of Ventricular Tachycardia (VT)
AV indicates atrioventricular; LAD, left axis deviation; LBBB, left bundle
ECG features of Ventricular ... bundle branch block ... bundle branch block ... #Ventricular #Tachycardia ... VTach #ECG #EKG #Electrocardiogram
Approach to ECGs - Tachy/Bradyarrhythmias
Tachyarrhythmias - HR > 100
Wide
  (1) VT - DANGER
  (2)
abberancy - N B Afib ... - w/ variable block ... (3) SA node block ... - Proximal AV block ... QRS - Distal AV block
Classic Digoxin-Associated Arrhythmias
 • Atrial fibrillation with an unusually slow ventricular response
 • Atrial Fibrillation with
unusually slow ventricular ... Complete Heart Block ... with 2:1 AV Block ... Tachycardia - ... cardiology #ecg #ekg #electrocardiogram
Anatomical Differential Diagnosis for Arrhythmias
 • SA node: Sinus bradycardia, Sick Sinus Syndrome (SSS)
 • AV
rhythm, Conduction blocks ... system: Conduction blocks ... • Ventricles: Ventricular ... Tachy-arrhythmias (ventricular ... Fibrillation (V-Fib
Tachyarrhythmia Framework - Differential Diagnosis
 • Narrow QRS - Regular Rhythm: Sinus tachycardia, AVNRT, Orthodromic AVRT,
w/ variable AV block ... bundle branch block ... bundle branch block ... with variable AV block ... bundle branch block
Tachycardia - Differential Diagnosis Table - Wide vs Narrow, Regular vs Irregular

Regular Rhythm - Narrow Complex
: • AFib > AFIutter ... + variable block ... WPW vs PMVT vs AFib ... Beware AV nodal blockers ... known QRS • AFib
Arrhythmias - Differential Diagnosis Algorithm

Bradyarrhythmia (<60 bpm)
 • Sinus Bradycardia
 • Sick Sinus Syndrome
 • SA
Syndrome • SA Block ... • AV Block (ISt ... Escape Rhythm • Ventricular ... • Premature ventricular ... interval) • AFib
66 yo with syncope - Ventricular Tachycardia

This ECG shows a wide-complex tachycardia in a right bundle
with syncope - Ventricular ... Tachycardia This ... bundle branch block ... the diagnosis of ventricular ... Cardiology #ECG #EKG #Electrocardiogram
Causes of Palpitations
 • ARRHYTHMiA 
 • SINUS ARRYTHMIA 
 • ATRIAL FIBRILLATION 
 • ATRIAL
FLUTTER • HEART BLOCK ... • PREMATURE VENTRICULAR ... • ATRIAL TACHYCARDIA ... • VENTRICULAR ... SODIUM CHANNEL BLOCKERS
Bradycardia - Differential Diagnosis Framework and Management
Narrow Complex Bradycardia:
 • Regular: Sinus Bradycardia, AFib w/ AV
w/ AV Block, Atrial ... Tachy w/ AV Block ... w/ Variable AV Block ... , Mobitz I AV Block ... SVT WI Wide QRS, Ventricular