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

Regular Rhythm - Narrow Complex
Tachycardia - Differential ... Narrow Complex Tachycardia ... variability • Tx: Vagal ... - Wide Complex Tachycardia ... Narrow Complex Tachycardia
Treatment of Stable Narrow-Complex Tachycardia
Regular Rhythm:
 • Attempt vagal maneuvers
 • Give adenosine 6 milligrams IV
Narrow-Complex Tachycardia ... Rhythm: • Attempt vagal ... ectopic atrial tachycardia ... , junctional tachycardia ... NarrowComplex #Tachycardia
Digoxin 101 - Pharmacology
Indications:

1) Tachyarrhythmias 
 • Atrial Fibrillation, Atrial Flutter, Supraventricular Tachycardias
 • ↑ Vagal
Supraventricular Tachycardias ... • ↑ Vagal tone
Pediatric SVT - Management Algorithm
Identify SVT:
 • HR not variable
 • Abrupt rate changes
 • Infants:
Vagal Maneuvers ... supraventricular #tachycardia
Intrapartum Abnormal Fetal HR Tracing - Causes of Bradycardia and Tachycardia - Differential Diagnosis Algorithm
Maternal Bradycardia:
Bradycardia and Tachycardia ... hypoxia/acidosis • Vagal ... defect Maternal Tachycardia ... Anemia Fetal Tachycardia ... #Bradycardia #Tachycardia
Palpitations - Differential Diagnosis Framework

What?
• It is an unpleasant awareness or sensation that the heart is
flutter, or atrial tachycardia ... • Bradycardia-tachycardia ... Supraventricular tachycardia ... • Ventricular tachycardia ... massage or other vagal
Supraventricular Tachycardias - Pathophysiology
Conduction pathways through SA Node, Atrium, AV Node, Bundle of His, and Ventricle
Supraventricular Tachycardias ... Ventricle • Sinus Tachycardia ... • Atrial Tachycardia ... Nodal Reentry Tachycardia ... • AV Reentry Tachycardia
Narrow Complex Tachycardias (Simplified)

Irregular Narrow Complex Tachycardia:
 1. Atrial fibrillation
	- Usually the correct answer
 2. Multifocal
Narrow Complex Tachycardias ... Narrow Complex Tachycardia ... Multifocal Atrial Tachycardia ... Narrow Complex Tachycardia ... Sinus tachycardia
Anatomical Differential Diagnosis for Arrhythmias
 • SA node: Sinus bradycardia, Sick Sinus Syndrome (SSS)
 • AV
SA node: Sinus tachycardia ... supraventricular tachycardias ... , Focal Atrial Tachycardia ... AV re-entrant tachycardia ... ), Ventricular tachycardia
Approach to the Hypotensive Patient - Differential Diagnosis Framework for Hypotension

Blood Pressure = Heart Rate x
sinus syndrome Tachycardia ... time): • Sinus tachycardia ... • Atrial tachycardias