BBB
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What is the duration of the QRS in a Left bundle branch block (LBBB)?
QRS > 0.12 seconds Less than or equal to 0.12 seconds 3 small boxes or less
What is Right bundle branch block (RBBB) QRS duration?
QRS >12 seconds 4 small boxes or more
In a LBBB what is found in lead I and V6 ?
Broad monomorphic R waves in lead I and V6 with no Q waves
In a LBBB what is found in V1?
Broad monomorphic S waves in V1 may have a small r wave
What does it mean if V1 is positive?
It is a right sided issue
In a RBBB what is found in V1
RSR or notched R
What is found in lead I and V6 with a RBBB?
Slurred S wave
