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Almost any type of cardiac arrhythmia is seen in digitalis toxic­ity. However, type II second-degree atrioventricular
(AV) block is not ... , first-degree AV ... block, ventricular ... Complete heart block ... #Diagnosis #Cardiology
Summary of Heart Blocks
1st Degree Heart Block:
 • Prolonged PR >200ms (5 small squares).
 • Narrow
Heart Block: ... • Block in AV ... beyond AV node) ... #EKG #electrocardiogram ... #ecg #cardiology
Atrioventricular (AV) Blocks

First Degree AV Block - "If your R is far from your P than
AV Block - Mobitz ... AV Block - "If ... #AV #Blocks #heart ... #heartblock #cardiology ... #ecg #ekg #diagnosis
Lead AVR on ECG
1. Acute myocardial infarction: ST elevation > 1.5 mm in aVR, indicative of
Lead AVR on ECG ... • Classic EKG ... #AVR #leadAVR #ecg ... #diagnosis #ekg ... #differential #cardiology
Approach to ECGs - Tachy/Bradyarrhythmias
Tachyarrhythmias - HR > 100
Wide
  (1) VT - DANGER
  (2)
block (lower AV ... block - ventricular ... bradyarrhythmia #ECG ... #EKG #diagnosis ... #cardiology #differential
Atrioventricular Blocks (AV blocks) - ECG Diagnosis Summary
First Degree AV Block
 • The P wave is
) - ECG Diagnosis ... Second Degree AV ... Heart Block • ... #cardiology #ekg ... #ecg #diagnosis
Third Degree AV Block aka Complete Heart Block
 • In sinus rhythm with complete AV block,
Third Degree AV ... Heart Block • ... with complete AV ... #cardiology #ekg ... #ecg #diagnosis
Arrhythmias - Differential Diagnosis Algorithm

Bradyarrhythmia (<60 bpm)
 • Sinus Bradycardia
 • Sick Sinus Syndrome
 • SA
Syndrome • SA Block ... • AV Block (ISt ... /2nd /3rd degree ... with Variable AV ... tachyarrhythmias #Cardiology
EKG Interpretation Cheat Sheet
1) Rate 
 - Regular - Count-Off 
 - Irregular - Count number
EKG Interpretation ... interval < 120 ms = AV ... >200ms • 2° Block ... @AmyChung #EKG ... #cardiology #diagnosis