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Anatomical Differential Diagnosis for Arrhythmias
 • SA node: Sinus bradycardia, Sick Sinus Syndrome (SSS)
 • AV
Syndrome (SSS) • AV ... 1 2°) • His-purkinje ... (MAT) • AV node ... : AV re-entrant ... ), AV nodal re-entrant
Approach to ECGs - Tachy/Bradyarrhythmias
Tachyarrhythmias - HR > 100
Wide
  (1) VT - DANGER
  (2)
(3) Multifocal ... rhythms (5) AV ... QRS - Proximal AV ... block (lower AV ... Wide QRS - Distal AV
Atrioventricular (AV) Blocks

First Degree AV Block - "If your R is far from your P than
Degree AV Block ... 1 AV conduction ... independently of the atria ... #ekg #diagnosis ... #electrocardiogram
Classic Digoxin-Associated Arrhythmias
 • Atrial fibrillation with an unusually slow ventricular response
 • Atrial Fibrillation with
Arrhythmias • Atrial ... Complete Heart Block ... Tachycardia with 2: ... 1 AV Block • Bidirectional ... #ekg #electrocardiogram
EKG Interpretation Cheat Sheet
1) Rate 
 - Regular - Count-Off 
 - Irregular - Count number
interval < 120 ms = AV ... (e.g. ectopic atrial ... P-Wave Morphology = multifocal ... • 2° Block Type ... #Electrocardiogram
Summary of Heart Blocks
1st Degree Heart Block:
 • Prolonged PR >200ms (5 small squares).
 • Narrow
relationship (2: ... 1 or 3:1 block) ... • Block in AV ... beyond AV node) ... #electrocardiogram
Lead AVR on ECG
1. Acute myocardial infarction: ST elevation > 1.5 mm in aVR, indicative of
Lead AVR on ECG ... 1. ... failure, and death. 2. ... Subepicardial atrial ... #electrocardiogram
Approach to ECGs
Check
 - Age, gender, name
 - 25mm/s; 10mm/mV
 - 1mm = 40ms; 0.1 mV
Rate
x 10 Rhythm (1) ... boxes) - HiPR: AV ... block - LoPR: ... WPW, ectopic atrial ... #electrocardiogram
Negative Contrast Effect in Right Atrium - Differential Diagnosis
1. Small secundum ASD or PFO with left
Diagnosis 1. ... Small secundum ASD ... to right shunt 2. ... echocardiogram #s4c ... #pocus #bubble
This infographic provides a mnemonic tool called “WOBBLER” for assessing an ECG (electrocardiogram) in cases of
(electrocardiogram ... O: Obstructed AV ... atrioventricular (AV ... as first-degree AV ... #cardiology #differential