38 results
Supraventricular Tachycardias - Pathophysiology
Conduction pathways through SA Node, Atrium, AV Node, Bundle of His, and Ventricle
, AV Node, Bundle ... • AV Nodal Reentry ... AV Reentry Tachycardia ... Pathophysiology #SVT ... #diagnosis #cardiology
Tachyarrhythmia Framework - Differential Diagnosis
 • Narrow QRS - Regular Rhythm: Sinus tachycardia, AVNRT, Orthodromic AVRT,
AVRT, Atrial Tachycardia ... flutter w/ variable AV ... block, Antidromic AVRT ... with variable AV ... #cardiology
Anatomical Differential Diagnosis for Arrhythmias
 • SA node: Sinus bradycardia, Sick Sinus Syndrome (SSS)
 • AV
Syndrome (SSS) • AV ... ) • AV node: AV ... (AVRT), AV nodal ... (AVNRT) • Ventricles ... #Causes #cardiology
Tachycardia - Differential Diagnosis Framework
Narrow-Complex:
 • Regular: Sinus Tachycardia, Junctional Tachycardia, Atrial Tachycardia, Atrial Flutter, AVRT
Diagnosis Framework ... , Atrial Tachycardia ... , AVRT (ie. ... , Antidromic AVRT ... #cardiology #wide
Lead AVR on ECG
1. Acute myocardial infarction: ST elevation > 1.5 mm in aVR, indicative of
Lead AVR on ECG ... ddx: AVNRT, AVRT ... , atrial tachycardia ... tachycardia (SVT ... #cardiology
Arrhythmias - Differential Diagnosis Algorithm

Bradyarrhythmia (<60 bpm)
 • Sinus Bradycardia
 • Sick Sinus Syndrome
 • SA
• SA Block • AV ... Aflutter • AVNRT ... • AVRT (ie ... with Variable AV ... #Algorithm #causes
Narrow Complex Tachycardias (Simplified)

Irregular Narrow Complex Tachycardia:
 1. Atrial fibrillation
	- Usually the correct answer
 2. Multifocal
"PSVT" (atrioventricular ... retrograde) - AVNRT ... , AVRT, Junctional ... #differential #diagnosis ... #causes #cardiology
Lead aVR on EKG
Lead aVR can provide some unique insight into 5 different conditions:

 - Acute
Lead aVR on EKG ... TCA-like overdose - AVRT ... Brugada criteria) #Diagnosis ... #Cardiology #EKG ... #ECG #Lead #AVR
Classic Digoxin-Associated Arrhythmias
 • Atrial fibrillation with an unusually slow ventricular response
 • Atrial Fibrillation with
2:1 AV Block • ... Bidirectional Ventricular ... #Arrhythmias #diagnosis ... #cardiology #ecg ... #ekg #electrocardiogram
Causes of Tachycardia - Differential Diagnosis Algorithm
Narrow Complex - Regular:
 • Sinus tachycardia
 • Atrial flutter
Causes of Tachycardia ... • AV nodal reentrant ... AV reentrant tachycardia ... • Atrial tachycardia ... #cardiology