Bundle Branch Block Flashcards
1
Q
What is a bundle branch block?
A
A QRS greater than 0.12
>0.12
2
Q
What are features of a right bundle branch block?
A
Pattern of >0.12 QRS in V1
(Looks like a W)
S waves in V6
(Looks like an M)
Maybe inversion of T waves
3
Q
What are the features of a left bundle branch block?
A
S waves found in V1
(Looks like an M )
Pattern of >0.12 QRS seen in leads V5-V6
4
Q
What are the signs of Left ventricular hypertrophy on an ECG?
A
The R waves is greater than 25mm in V6 - onwards
Large QRS complex spikes
5
Q
What are causes of Left bundle branch block?
A
Cardiomyopathy
Hypertension
6
Q
What are causes of right bundle branch block?
A
Pulmonary embolism
Cor pulmonale
7
Q
What is the sign of Ventricular tachycardia?
A
Regular broad complexes
No P waves or T waves
