The 12 Lead ECG and Method of Interpretation (Lessons I and II)
Question 1: Determine the QRS axis for this ECG
A.
Indeterminate
B.
+90 degrees
C.
-30 degrees
D.
-45 degrees
E.
+150 degrees
Question 2: Determine the axis for this ECG
A.
+90 degrees
B.
Indeterminate
C.
+30 degrees
D.
-30 degrees
E.
-150 degrees
Question 3: What is the normal range of the QRS axis?
A.
0 degrees to 180 degrees
B.
0 degrees to +90 degrees
C.
-30 degrees to +90 degrees
D.
-90 degrees to +90 degrees
E.
-90 degrees to +30 degrees
Question 4: What direction of current do leads V1 and V2 measure?
A.
Left / Right forces
B.
Leftward forces only
C.
Anterior / Posterior forces
D.
Superior / Inferior forces
E.
Inward / Outward forces
Question 5: What lead measures about the same direction of current as lead I?
A.
aVF
B.
II
C.
III
D.
V1
E.
V6
Question 6: Determine the QRS axis for this ECG:
A.
-60 degrees
B.
-45 degrees
C.
+60 degrees
D.
Indeterminate
E.
0 degrees
Question 7: Determine the QRS axis for this ECG:
A.
-75 degrees
B.
-30 degrees
C.
0 degrees
D.
+45 degrees
E.
Indeterminate
Question 8: Determine the QRS axis for this ECG:
A.
-15 degrees
B.
+15 degrees
C.
+60 degrees
D.
+105 degrees
E.
Indeterminate
Question 9: Determine the QRS axis for this ECG:
A.
-100 degrees
B.
-30 degrees
C.
+15 degrees
D.
+90 degrees
E.
Indeterminate
Question 10: What lead primarily measures forces moving from the head to the feet (inferiorly)?
A.
Lead I
B.
aVF
C.
aVL
D.
V1
E.
V6