Lead aVR on EKG Lead aVR can provide some unique insight into 5 different conditions: - Acute MI - Pericarditis - Tricyclic antidepressant (TCA) and TCA-like overdose - AVRT in narrow complex tachycardias - Differentiating VT from SVT with aberrancy in wide complex tachycardias by using the Vereckei criteria (possibly better than Brugada criteria) #Diagnosis #Cardiology #EKG #ECG #Lead #AVR #Utility #ALiEM