Chapter 15 Basic 12-Lead ECG Interpretation
Multiple Choice Questions
1. A standard 12-lead ECG focuses directly on which portion of the heart?
A. Right ventricle
B. Right atrium
C. Left ventricle
D. Left atrium
2. Which leads view the inferior wall of the left ventricle?
A. I, aVL, V5, and V6
B. V3 and V4
C. V1 and V2
D. II, III, and aVF
3. Which leads view the septal wall?
A. II, III, and aVF
B. V1 and V2
C. V3 and V4
D. I, aVL, V5, and V6
4. Which leads view the anterior wall of the left ventricle?
A. II, III, and aVF
B. V1 and V2
C. V3 and V4
D. I, aVL, V5, and V6
,5. Which leads view the lateral wall of the left ventricle?
A. II, III, and aVF
B. V1 and V2
C. V3 and V4
D. I, aVL, V5, and V6
6. Leads II, III, and aVF view which coronary artery and which branch?
A. Right coronary, marginal branch
B. Left coronary, septal branch
C. Left coronary, left anterior descending
D. Left coronary, left circumflex
7. Leads V1 and V2 view which coronary artery and branch?
A. Left coronary, left circumflex
B. Left coronary, left anterior descending
C. Right coronary, marginal branch
D. Left coronary, septal branch
8. Leads V3 and V4 view which coronary artery and branch?
A. Left coronary, left anterior descending
B. Left coronary, left circumflex
C. Left coronary, septal branch
D. Right coronary, marginal branch
9. Leads I, aVL, V5, and V6 view which coronary artery and branch?
A. Right coronary, marginal branch
B. Left coronary, septal branch
C. Left coronary, left anterior descending
D. Left coronary, left circumflex
, 10. Two or more leads looking at the same part of the heart, or numerically consecutive
chest leads, are known as an: A. Artifact continuing lead
B. Anatomically contiguous lead
C. Anatomical contraction lead
D. Automatic continuing lead
11. A reduction or interruption in blood flow and oxygen to the myocardium, possibly for a
short period of time, is: A. Myocardial ischemia
B. Myocardial infarct
C. Myocardial injury
D. Myocardial interruption
12. Reduction or interruption of blood flow that persists for a few minutes and causes the
affected myocardium to transition from myocardial ischemia to a worsened state is referred
as:
A. Myocardial ischemia
B. Myocardial infarct
C. Myocardial injury
D. Myocardial interruption
13. Which of the following are anatomically contiguous leads?
A. II, III, aVF
B. I, aVL
C. V1, V2, V3, V4, V5, V6
D. All of the above
14. A normal Q wave that measures less than 0.04 second in duration and less than 1/3 the
height of the R wave in a lead is called a:
A. Premature Q wave
B. Physiologic Q wave
C. Pathologic Q wave
Multiple Choice Questions
1. A standard 12-lead ECG focuses directly on which portion of the heart?
A. Right ventricle
B. Right atrium
C. Left ventricle
D. Left atrium
2. Which leads view the inferior wall of the left ventricle?
A. I, aVL, V5, and V6
B. V3 and V4
C. V1 and V2
D. II, III, and aVF
3. Which leads view the septal wall?
A. II, III, and aVF
B. V1 and V2
C. V3 and V4
D. I, aVL, V5, and V6
4. Which leads view the anterior wall of the left ventricle?
A. II, III, and aVF
B. V1 and V2
C. V3 and V4
D. I, aVL, V5, and V6
,5. Which leads view the lateral wall of the left ventricle?
A. II, III, and aVF
B. V1 and V2
C. V3 and V4
D. I, aVL, V5, and V6
6. Leads II, III, and aVF view which coronary artery and which branch?
A. Right coronary, marginal branch
B. Left coronary, septal branch
C. Left coronary, left anterior descending
D. Left coronary, left circumflex
7. Leads V1 and V2 view which coronary artery and branch?
A. Left coronary, left circumflex
B. Left coronary, left anterior descending
C. Right coronary, marginal branch
D. Left coronary, septal branch
8. Leads V3 and V4 view which coronary artery and branch?
A. Left coronary, left anterior descending
B. Left coronary, left circumflex
C. Left coronary, septal branch
D. Right coronary, marginal branch
9. Leads I, aVL, V5, and V6 view which coronary artery and branch?
A. Right coronary, marginal branch
B. Left coronary, septal branch
C. Left coronary, left anterior descending
D. Left coronary, left circumflex
, 10. Two or more leads looking at the same part of the heart, or numerically consecutive
chest leads, are known as an: A. Artifact continuing lead
B. Anatomically contiguous lead
C. Anatomical contraction lead
D. Automatic continuing lead
11. A reduction or interruption in blood flow and oxygen to the myocardium, possibly for a
short period of time, is: A. Myocardial ischemia
B. Myocardial infarct
C. Myocardial injury
D. Myocardial interruption
12. Reduction or interruption of blood flow that persists for a few minutes and causes the
affected myocardium to transition from myocardial ischemia to a worsened state is referred
as:
A. Myocardial ischemia
B. Myocardial infarct
C. Myocardial injury
D. Myocardial interruption
13. Which of the following are anatomically contiguous leads?
A. II, III, aVF
B. I, aVL
C. V1, V2, V3, V4, V5, V6
D. All of the above
14. A normal Q wave that measures less than 0.04 second in duration and less than 1/3 the
height of the R wave in a lead is called a:
A. Premature Q wave
B. Physiologic Q wave
C. Pathologic Q wave
