24 results
Tachyarrhythmia Framework - Differential Diagnosis
 • Narrow QRS - Regular Rhythm: Sinus tachycardia, AVNRT, Orthodromic AVRT,
Sinus tachycardia, AVNRT ... , Orthodromic AVRT ... flutter w/ variable AV ... block, Antidromic AVRT ... with variable AV
Syncope - Differential Diagnosis Algorithm
Neurocardiogenic:
 • Vasovagal
 • Orthostatic Hypotension
 • Autonomic Neuropathy
 • Situational (micturition,
Differential Diagnosis Algorithm ... AFlutter • AVNRT ... /AVRT - Bradyarrhythmia ... 2nd/3rd degree AV ... #causes
Anatomical Differential Diagnosis for Arrhythmias
 • SA node: Sinus bradycardia, Sick Sinus Syndrome (SSS)
 • AV
Syndrome (SSS) • AV ... node: AV re-entrant ... tachycardia (AVRT ... tachycardia (AVNRT ... Differential #Diagnosis #Causes
Arrhythmias - Differential Diagnosis Algorithm

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

Irregular Narrow Complex Tachycardia:
 1. Atrial fibrillation
	- Usually the correct answer
 2. Multifocal
retrograde) - AVNRT ... , AVRT, Junctional ... differential #diagnosis #causes
Treatment of Stable Narrow-Complex Tachycardia
Regular Rhythm:
 • Attempt vagal maneuvers
 • Give adenosine 6 milligrams IV
Converts - Probably AVnRT ... or AVRT - Observe ... Control rate with AV ... Treat underlying cause ... management #cardiology #algorithm
Visual Guide to AV Nodal Reentrant Tachycardia (AVNRT) - Pathophysiology
 - Dual AV nodal physiology is
Reentrant Tachycardia (AVNRT ... substrate for AVNRT ... trigger the typical AVNRT ... what known as AVNRT ... #Tachycardia #AVNRT
Supraventricular Tachycardias - Pathophysiology
Conduction pathways through SA Node, Atrium, AV Node, Bundle of His, and Ventricle
Node, Atrium, AV ... Fibrillation • AV ... Tachycardia • AV ... conduction #pathways #avnrt
Tachycardia - Differential Diagnosis Table - Wide vs Narrow, Regular vs Irregular

Regular Rhythm - Narrow Complex
• ST vs SVT (AVNRT ... , OAVRT, AFIutter ... whether AF is cause ... Tx: Underlying cause ... abnormality • Beware AV
Cannon A waves during AVNRT on Physical Exam
In AVNRT, the atria and ventricles contract nearly simultaneously
A waves during AVNRT ... Physical Exam In AVNRT ... minute=rate of AVNRT ... as Typical AVNRT ... Cannon #Awaves #AVNRT