14 results
Anatomical Differential Diagnosis for Arrhythmias
 • SA node: Sinus bradycardia, Sick Sinus Syndrome (SSS)
 • AV
tachycardia • Atria ... : Premature Atrial ... Flutter (AFL), Atrial ... #Diagnosis #Causes ... #cardiology
Narrow Complex Tachycardias (Simplified)

Irregular Narrow Complex Tachycardia:
 1. Atrial fibrillation
	- Usually the correct answer
 2. Multifocal
Atrial fibrillation ... Multifocal Atrial ... Atrial flutter ... (Ectopic) Atrial ... #diagnosis #causes
Cannon A waves during AVNRT on Physical Exam
In AVNRT, the atria and ventricles contract nearly simultaneously
the atria and ventricles ... EKG of the same ... are enough to diagnose ... excludes other differentials ... PhysicalExam #JVP #Cardiology
Cannon A Waves
 • Caused by atrial contracting against a closed tricuspid valve
 • Atrioventricular dissociation
Caused by atrial ... dissociation + retrograde atrial ... activation from SVT (e.g ... #AWaves #diagnosis ... #cardiology #CVP
Arrhythmias - Differential Diagnosis Algorithm

Bradyarrhythmia (<60 bpm)
 • Sinus Bradycardia
 • Sick Sinus Syndrome
 • SA
• Premature atrial ... Monofocal Ectopic Atrial ... Aflutter • AVNRT ... • Multifocal Atrial ... #causes
Lead AVR on ECG
1. Acute myocardial infarction: ST elevation > 1.5 mm in aVR, indicative of
Subepicardial atrial ... tachycardia ddx: AVNRT ... , AVRT, atrial tachycardia ... #ekg #differential ... #cardiology
Causes of Palpitations
 • ARRHYTHMiA 
 • SINUS ARRYTHMIA 
 • ATRIAL FIBRILLATION 
 • ATRIAL
ARRYTHMIA • ATRIAL ... FIBRILLATION • ATRIAL ... TACHYCARDIA • ATRIAL ... #Differential # ... Diagnosis #Cardiology
Palpitations - Differential Diagnosis Framework

What?
• It is an unpleasant awareness or sensation that the heart is
exam • 12-lead ECG ... Paroxysmal AF, atrial ... flutter, or atrial ... Arrhythmias: • Atrial ... • Multifocal atrial
Approach to ECGs - Tachy/Bradyarrhythmias
Tachyarrhythmias - HR > 100
Wide
  (1) VT - DANGER
  (2)
tachycardia (2) Atrial ... (3) SVTs - atrial ... (3) Multifocal atrial ... #EKG #diagnosis ... #differential
Negative Contrast Effect in Right Atrium - Differential Diagnosis
1. Small secundum ASD or PFO with left
Effect in Right Atrium ... Small secundum ASD ... Effect #Right #Atrium ... #Diagnosis #cardiology ... echocardiogram #s4c