ECG Flashcards
RBBB
MARROW- M in V1 and W in V6
LBBB
WILLIAM- W in V1 and W in V6
right axis deviation
lead 1 becomes NEGATIVE and lead 3 becomes MORE POSITIVE
left axis deviation
lead 3 becomes NEGATIVE. not truly LAD until NEGATIVE in lead 2 as well.
why do these changes happen in RAD
right ventricle hypertrophies and has more of an effect on QRS so the axis swings to the right
what is RAD associated with
pulmonary conditions putting a strain on the right side of the heart and congenital heart disorders
why do these changes happen in LAD
left ventricle hypertrophies more influence on QRS than right ventricle so swings to the left
what is LAD associated with
usually due to conduction defect
what do the chest leads look at
v1-2: right ventricle; v3-4: septum; v5-6: left ventricle
what is the pattern of QRS over the chest leads
predominantly downward in V1-2, progressively more positive as moves towards V5-6.
what is the transition point on chest leads
where R and S are equal- around V3-4
If the transition point has moved to V4-5/V5-6 what does this indicate
right ventricle enlargement
what happens to QRS in BBB
widens
what sign on the ECG accompanies LBBB
T wave inversion
what causes LAD (conduction)
left anterior fascicular block
