32 results
Tachycardia - Differential Diagnosis Framework
Narrow-Complex:
 • Regular: Sinus Tachycardia, Junctional Tachycardia, Atrial Tachycardia, Atrial Flutter, AVRT
Framework Narrow-Complex ... Atrial Flutter, AVRT ... WPW), AVnRT (ie ... block) Regular-Complex ... Tachycardia, Antidromic AVRT
Lead AVR on ECG
1. Acute myocardial infarction: ST elevation > 1.5 mm in aVR, indicative of
reentry tachycardia (AVRT ... tachycardia • Narrow complex ... tachycardia ddx: AVNRT ... , AVRT, atrial tachycardia ... suggestive more of AVRT
Narrow Complex Tachycardias (Simplified)

Irregular Narrow Complex Tachycardia:
 1. Atrial fibrillation
	- Usually the correct answer
 2. Multifocal
Narrow Complex Tachycardias ... Irregular Narrow Complex ... Regular Narrow Complex ... retrograde) - AVNRT ... , AVRT, Junctional
Arrhythmias - Differential Diagnosis Algorithm

Bradyarrhythmia (<60 bpm)
 • Sinus Bradycardia
 • Sick Sinus Syndrome
 • SA
Differential Diagnosis Algorithm ... bpm) - Narrow Complex ... Aflutter • AVNRT ... • AVRT (ie ... Differential #Diagnosis #Algorithm
Lead aVR on EKG
Lead aVR can provide some unique insight into 5 different conditions:

 - Acute
Lead aVR on EKG ... Lead aVR can provide ... TCA-like overdose - AVRT ... in narrow complex ... aberrancy in wide complex
Syncope - Differential Diagnosis Algorithm
Neurocardiogenic:
 • Vasovagal
 • Orthostatic Hypotension
 • Autonomic Neuropathy
 • Situational (micturition,
Differential Diagnosis Algorithm ... AFlutter • AVNRT ... /AVRT - Bradyarrhythmia ... Differential #Diagnosis #Algorithm
Wolff-Parkinson-White (WPW)
- Orthodromic AVRT: Narrow complex, most common 
- Antidromic AVRT: wide complex because goes through
- Orthodromic AVRT ... : Narrow complex ... - Antidromic AVRT ... : wide complex because
Anatomical Differential Diagnosis for Arrhythmias
 • SA node: Sinus bradycardia, Sick Sinus Syndrome (SSS)
 • AV
re-entrant tachycardia (AVRT ... re-entrant tachycardia (AVNRT ... Contractions (PVC
Treatment of Stable Narrow-Complex Tachycardia
Regular Rhythm:
 • Attempt vagal maneuvers
 • Give adenosine 6 milligrams IV
Stable Narrow-Complex ... Converts - Probably AVnRT ... or AVRT - Observe ... 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