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Tachycardia - Differential Diagnosis Table - Wide vs Narrow, Regular vs Irregular

Regular Rhythm - Narrow Complex
: • ST vs SVT ... • Tx: Vagal maneuvers ... • HyperK vs VT ... > SVT+conduction ... abnormality • Beware AV
Arrhythmias - Differential Diagnosis Algorithm

Bradyarrhythmia (<60 bpm)
 • Sinus Bradycardia
 • Sick Sinus Syndrome
 • SA
Regular Rhythm SVT ... Irregular Rhythm SVT ... Regular rhythm SVT ... Irregular rhythm SVT ... Diagnosis #Algorithm #causes
Anatomical Differential Diagnosis for Arrhythmias
 • SA node: Sinus bradycardia, Sick Sinus Syndrome (SSS)
 • AV
tachycardia (AVRT ... tachycardia (AVNRT ... (V-tach, VT), Monomorphic ... VT, Polymorphic ... VT (i.e.
Supraventricular Tachycardia EKG

Here’s a great ECG case of a 50-year-old lady who presented with palpitations

Her heart
great ECG case of ... consistent with SVT ... #SVT #Supraventricular ... #Tachycardia #EKG ... #Clinical
Supraventricular tachycardia (SVT) is an abnormally fast heart rhythm arising from improper electrical activity in upper
(SVT) is an abnormally ... #Clinical #MedStudent ... #Cardiology #EKG ... #SVT #SupraVentricularTachycardia ... #ECGEducator
Approach to ECGs - VT vs. SVT - Wide Tachycardias
DDx = VT vs. SVT with BBB
All
SVT - Wide Tachycardias ... SVT with BBB All ... is positive in aVR ... (> 160ms) - AV ... #VT #VTach #SVT
Algorithm for the Evaluation of Regular, Wide-Complex Tachycardia
1. aVR: Is the initial deflection in aVR positive?
If yes, then VT. ... If yes, then VT. ... If yes, then VT. ... If no, then VT. ... #EKG #Electrocardiogram
Palpitations - Differential Diagnosis Framework

What?
• It is an unpleasant awareness or sensation that the heart is
or VT • Rapid ... Arrhythmias: • SVT ... & termination: SVT ... or other vagal maneuvers ... : SVT-AVNRT or AVRT
Treatment of Stable Narrow-Complex Tachycardia
Regular Rhythm:
 • Attempt vagal maneuvers
 • Give adenosine 6 milligrams IV
Attempt vagal maneuvers ... or AVRT - Observe ... Control rate with AV ... Treat underlying cause ... Treat underlying cause
Approach to ECGs - Tachy/Bradyarrhythmias
Tachyarrhythmias - HR > 100
Wide
  (1) VT - DANGER
  (2)
100 Wide (1) VT ... w/ BBB (3) SVT ... flutter (3) SVTs ... 200ms from longer pause ... #EKG #diagnosis