EKGs Flashcards
(21 cards)
What do you consider if the QRS is >.12 sec but the PR is normal (.12-.2)
Consider a transduction problems (RBBB, LBBB, IVCD)
What are diagnostic criteria of RBBB?
QRS >.12 sec
Large Slurred R waves in V1
Slurred S waves in V6
ST segments and T waves oriented opposite from terminal QRS
What are some diagnostic items of LBBB?
R waves notched in left precordial leads (V5, V6) and Lead I
NO more small Q waves in Lead I and V6
ST segments opposite QRS
IF the QRS in Lead I is negative what does that mean?
RIGHT AXIS deviation
How do you determine axis in Frontal Plane?
1) Isoelectric QRS, Axis is 90 degrees away
2) Find two spatially adjacent leads
(aVL, I, aVR, II, aVF, III)
One negative QRS and the other positive (isoelectric is halfway between them) then 90 degrees away)
3) If all QRS positive except aVR then Axis is at 45 degrees (normal) (-30 to 90)
What is Left Axis Deviation?
-31 to -90
What is Right Axis Deviation?
91 to 180
Whats a quick screen for a normal axis?
Positive Lead I and II
Whats a quick screen for Left axis deviation?
Positive lead 1 and negative lead II
What is quick screen for Right axis deviation?
Neg Lead I and Pos lead II
Where do you check for R Ventricle hypertrophy?
VI R wave
Where do you check for R atria hypertrophy?
V1 p wave
What will you see in Lef Ventricle Hypertrophy?
V5, 6 R wave and V1 deep S wave
Where do you look for RBBB?
In V1 and V2 looks for QRS
Where do you look for LBBB?
Look in V5, V6 for notching
If you see isoelectric point in V1, V2 what does that mean?
It means there is rightward rotation
What if you see isoelectric pint at V5, V6?
It means leftward rotation
What will you see in a posterior infarction?
Large R with ST depression in V1, V2
What will you see in inferior infarct?
Qs in II, III, aVF (R. and L. coronary)
What will you see in an anterior infarction?
Qs in V1, V2, V3, V4 (anterior descending)
What will you see in a lateral infarciton?
Qs in lateral leads 1 and aVL
