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Supraventricular Tachycardia (SVT) - Differential Diagnosis Framework and Management

Regular SVT: Sinus Tachycardia, AVNRT, AVRT, Atrial Flutter,
Supraventricular Tachycardia (SVT ... Management Regular SVT ... : Sinus Tachycardia ... Fibrillation, MAT, Sinus ... MANAGEMENT: Modified Valsalva
Modified Valsalva Maneuver Insturctions

- 43% vs 17% response compared to the standard valsalva maneuver

Per ACLS and
Modified Valsalva ... or carotid sinus ... Lastly, sit the ... conversion to sinus ... Protocol #Procedure #SVT
Arrhythmias - Differential Diagnosis Algorithm

Bradyarrhythmia (<60 bpm)
 • Sinus Bradycardia
 • Sick Sinus Syndrome
 • SA
(<60 bpm) • Sinus ... Bradycardia • Sick Sinus ... Regular Rhythm SVT ... Interval) • Sinus ... Irregular Rhythm SVT
Tachycardia - Differential Diagnosis Framework
Narrow-Complex:
 • Regular: Sinus Tachycardia, Junctional Tachycardia, Atrial Tachycardia, Atrial Flutter, AVRT
Narrow-Complex: • Regular: Sinus ... WPW), AVnRT (ie SVT ... Antidromic AVRT, SVT ... Irregular: Polymorphic VT ... Any irregular SVT
VT versus SVT with Aberration - Interpretation Cheat Sheet

Features favouring VT
● Absence of typical RBBB or
VT versus SVT with ... Features favouring VT ... beats (normal sinus ... complex of normal sinus ... VentricularTachycardia #SVT
Aortic Measurements on Echocardiography
Aortic annulus 1.4-2.6 cm
Sinus of Valsalva 2.1-3.5 cm
Sinotubular junction 1.7-3.4 cm
Ascending Aorta 2.1-3.4
annulus 1.4-2.6 cm Sinus ... of Valsalva 2.1
Supraventricular Tachycardia Differential Diagnosis
Sinus Tachycardia
Sinus Node Re-entry Tachycardia
Unifocal Atrial Tachycardia
Junctional Tachycardia
Multifocal Atrial Tachycardia (MAT)

- EB Medicine
Differential Diagnosis Sinus ... Tachycardia Sinus ... Diagnosis #causes #svt
Approach to ECGs - VT vs. SVT - Wide Tachycardias
DDx = VT vs. SVT with BBB
All
SVT - Wide Tachycardias ... DDx = VT vs. ... SVT with BBB All ... Fusion beats - a sinus ... #VT #VTach #SVT
Syncope - Differential Diagnosis
The percentage of syncopal events secondary to arrhythmias or structural disease is generally
Vasovagal • Carotid sinus ... • Brady (Sick sinus ... block) • Tachy (VT ... , SVT) • Inherited
Approach to ECGs - Tachy/Bradyarrhythmias
Tachyarrhythmias - HR > 100
Wide
  (1) VT - DANGER
  (2)
DANGER (2) Sinus ... w/ BBB (3) SVT ... Regular (1) Sinus ... flutter (3) SVTs ... HR < 60 (1) Sinus