Bundle Branch Block Flashcards
1
Q
What is bundle branch block?
A
blocks bundle of His, wide QRS
(delaying time for complete depolarisation of both ventricles)
2
Q
New LBBB + Chest pain =
A
Potential MI
3
Q
RBBB
Cause?
A
Pul emboli, IHD, RVH, RHF
Right ventricle activation later than LV
4
Q
What is seen on ECG?
A
QRS complex in R sided chest leads (V123) show RSR’ configuration
‘rabbit ears’ right sided chest leads
5
Q
What is the acronym to remember right and left BBB?
A
MaRRoW = RBBB
WiLLiaM = LBBB
6
Q
What does MaRRoW stand for/mean?
A
‘M’ in V1 (RSR wave)
‘W’ in V6 (deep S wave)
wide pathological S2 splitting = heart sound
7
Q
LBBB
Causes?
A
IHD
Valvular disease
LV later Than RV
8
Q
LBBB
Which leads?
A
1, aVL, V5 &6
9
Q
What does WiLLiaM stand for/mean?
A
‘W’ in V1
‘M’ in V6
May be ST segment depression and T wave inversion
10
Q
Tx for BBB?
A
pacemaker
