Cardiology MCQ 362: Tachycardia with LBBB pattern and left axis

Tachycardia with LBBB pattern and left axis deviation:
a) Mahaim fibre tachycardia
b) Bundle branch reentrant tachycardia
c) ARVD
d) All of the above

["Click here for the answer with explanation", "Correct Answer:"]

d) All of the above

LBBB pattern with left axis deviation in wide QRS tachycardia should make us suspect Mahaim fibre tachycardia or bundle branch reentrant tachycardia. The sinus rhythm ECG will be normal in Mahaim fibre tachycardia while some bundle branch block pattern is likely in bundle branch reentry in sinus rhythm ECG. Another possibility which has to be thought about is ARVD. Careful inspection of sinus rhythm ECG for epsilon waves may be useful in this case.

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Source: Cardiophile MD - October 24, 2014 Category: Cardiology Authors: Prof. Dr. Johnson Francis, MD, DM, FACC, FRCP Edin, FRCP London Tags: Cardiology MCQ DM / DNB Cardiology Entrance ECG / Electrophysiology Source Type: blogs