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Narrow Complex Tachycardias (Simplified)

Irregular Narrow Complex Tachycardia:
 1. Atrial fibrillation
	- Usually the correct answer
 2. Multifocal
Atrial fibrillation ... A regular rhythm ... (Ectopic) Atrial ... Ectopic P 4. ... diagnosis #causes #cardiology
A Summary slide of Sinoatrial Rhythms 
 • Sinus Rhythm
 • Sinus Arrhythmia
• Sinus Rhythm ... atrial tachycardia ... • Ectopic Atrial ... differential #diagnosis #cardiology ... #ekg #ecg
Inverted P Waves:
(A) Ectopic atrial rhythm
(B) Junctional rhythm 

#Inverted #PWaves #cardiology #diagnosis #ekg #ecg #electrocardiogram #differential
P Waves: (A) Ectopic ... atrial rhythm ... (B) Junctional rhythm ... Inverted #PWaves #cardiology ... #ecg #electrocardiogram
Anatomical Differential Diagnosis for Arrhythmias
 • SA node: Sinus bradycardia, Sick Sinus Syndrome (SSS)
 • AV
Junctional escape rhythm ... Ventricular Escape Rhythm ... idioventricular rhythm ... (PACs), Atrial ... Diagnosis #Causes #cardiology
Classic Digoxin-Associated Arrhythmias
 • Atrial fibrillation with an unusually slow ventricular response
 • Atrial Fibrillation with
Accelerated Escape Rhythm ... • Atrial Tachycardia ... Bidirectional Ventricular Tachycardia ... Arrhythmias #diagnosis #cardiology ... #ecg #ekg #electrocardiogram
Multifocal Atrial Tachycardia (MAT) on EKG
 • Heart rate > 100 bpm (usually 100-150 bpm)
 •
Multifocal Atrial ... Tachycardia (MAT ... Irregularly irregular rhythm ... MAT #Multifocal #Atrial ... #cardiology #EKG
Tachycardia - Wide vs Narrow Complex, Regular vs Irregular rhythm table

#Diagnosis #Cardiology #EKG #ECG #WideComplex #Narrow
Tachycardia - Wide ... Regular vs Irregular rhythm ... #Diagnosis #Cardiology ... #EKG #ECG #WideComplex ... #Narrow #Tachycardia
Tachyarrhythmia Framework - Differential Diagnosis
 • Narrow QRS - Regular Rhythm: Sinus tachycardia, AVNRT, Orthodromic AVRT,
QRS - Regular Rhythm ... Tachycardia, Atrial ... QRS - Irregular Rhythm ... QRS - Regular Rhythm ... Differential #Diagnosis #cardiology
Treatment of Stable Narrow-Complex Tachycardia
Regular Rhythm:
 • Attempt vagal maneuvers
 • Give adenosine 6 milligrams IV
Regular Rhythm: ... flutter, ectopic ... atrial tachycardia ... #Treatment #management ... #cardiology #algorithm
Multifocal Atrial Tachycardia (MAT)
• At least 3 different P wave morphologies: 
• Rate 100-180
• Irregular 
Etiology
Multifocal Atrial ... Tachycardia (MAT ... #Tachycardia #MAT ... #Cardiology #Diagnosis ... #ECG #EKG #Management