Bundle branch block

Question 1

What is bundle branch block?

Answer 1

Delay or blockage of electrical current along the left or right bundle branch

Question 2

What are the ECG features of bundle branch block?

Answer 2

WILLIAM and MARROW
in LBBB there is a ‘W’ in V1 and a ‘M’ in V6
in RBBB there is a ‘M’ in V1 and a ‘W’ in V6

Question 3

What are the causes of bundle branch block?

Answer 3

ischaemic heart disease
hypertension
aortic stenosis
cardiomyopathy
idiopathic

Question 4

What is the treatment for bundle branch block?

Answer 4

Treatment of underlying disease
Often asymptomatic
(Severe cases) Cardiac resynchronisation pacemaker