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Almost any type of cardiac arrhythmia is seen in digitalis toxic­ity. However, type II second-degree atrioventricular
) block is not seen ... seen are sinus bradycardia ... block, ventricular ... #Diagnosis #Cardiology ... #EKG #ECG #Digoxin
Classic Digoxin-Associated Arrhythmias
 • Atrial fibrillation with an unusually slow ventricular response
 • Atrial Fibrillation with
Arrhythmias • ... Complete Heart Block ... Tachycardia with 2:1 AV ... Block • Bidirectional ... #cardiology #ecg
Bradycardia - Differential Diagnosis Framework and Management
Narrow Complex Bradycardia:
 • Regular: Sinus Bradycardia, AFib w/ AV
, AFib w/ AV Block ... Irregular: Sinus Arrhythmia ... AV Block, Mobitz ... II AV Block Wide ... SVT WI Wide QRS, Ventricular
Anatomical Differential Diagnosis for Arrhythmias
 • SA node: Sinus bradycardia, Sick Sinus Syndrome (SSS)
 • AV
SA node: Sinus bradycardia ... tachycardia (AVRT ... tachycardia (V-tach ... Fibrillation (V-Fib ... Diagnosis #Causes #cardiology
Hallmark ECG features of Ventricular Tachycardia (VT)
AV indicates atrioventricular; LAD, left axis deviation; LBBB, left bundle
Tachycardia (VT) AV ... bundle branch block ... bundle branch block ... #VTach #ECG #EKG ... Electrocardiogram #Diagnosis #Cardiology
Approach to ECGs - Tachy/Bradyarrhythmias
Tachyarrhythmias - HR > 100
Wide
  (1) VT - DANGER
  (2)
- w/ variable block ... (3) SA node block ... block 1º - long ... block (lower AV ... block - ventricular
Arrhythmias - Differential Diagnosis Algorithm

Bradyarrhythmia (<60 bpm)
 • Sinus Bradycardia
 • Sick Sinus Syndrome
 • SA
bpm) • Sinus Bradycardia ... Syndrome • SA Block ... • AV Block (ISt ... AVNRT • AVRT ... tachyarrhythmias #Cardiology
Lead AVR on ECG
1. Acute myocardial infarction: ST elevation > 1.5 mm in aVR, indicative of
Lead AVR on ECG ... • Predictor of arrhythmia ... Differentiating ventricular ... #AVR #leadAVR #ecg ... #differential #cardiology
EKG Interpretation Cheat Sheet
1) Rate 
 - Regular - Count-Off 
 - Irregular - Count number
Interval: • 1° Block ... >200ms • 2° Block ... loss of P • 2° Block ... • 3° Complete Block ... Interpretation #ECG
Palpitations - Differential Diagnosis Framework

What?
• It is an unpleasant awareness or sensation that the heart is
exam • 12-lead ECG ... with variable block ... atrioventricular block ... : SVT-AVNRT or AVRT ... brain flow (VT/Vfib