Question 1

What two factors determine the portion of the heart that each lead "sees"?

Accepted Answer

The particular portion of the heart that each lead "sees" is determined by two factors.The first factor is the dominance of the left ventricle on the ECG and the second is the position of the positive electrode on the body.

Question 2

Where should the positive electrode for lead V5 be positioned?

Accepted Answer

A)  Right side of the sternum,fourth intercostal space 
B)  Left midaxillary line at the same level as V4 
C)  Left side of the sternum,fourth intercostal space 
D)  Left anterior axillary line at the same level as V4 
A)  Right side of the sternum,fourth intercostal space 
B)  Left midaxillary line at the same level as V4 
C)  Left side of the sternum,fourth intercostal space 
D)  Left anterior axillary line at the same level as V4 D

Question 3

Acute coronary syndromes consist of three major syndromes that are related.List the three syndromes.

Accepted Answer

Unstable angina,non-ST-segment elevation myocardial infarction,and ST-segment elevation myocardial infarction

Question 4

An ECG machine's sensitivity must be calibrated so that a 1-millivolt electrical signal will produce a deflection measuring exactly _____ mm tall.

Accepted Answer

A)  0.5 
B)  1 
C)  5 
D)  10 
A)  0.5 
B)  1 
C)  5 
D)  10

Question 5

Placement of right chest leads is identical to the standard chest leads except on the right side of the chest.

Accepted Answer

A) True 
 B)False

Question 6

Lead V3 views the _____ wall of the left ventricle.

Accepted Answer

A)  lateral 
B)  anterior 
C)  posterior 
D)  inferior 
A)  lateral 
B)  anterior 
C)  posterior 
D)  inferior

Question 7

Describe the appearance of a pathologic Q wave.

Accepted Answer

An abnormal (pathologic)Q wave is more t

Question 8

The coronary arteries originate at the base of the _____.

Accepted Answer

The answer of The coronary arteries originate at the base...

Question 9

Anterior or lateral wall myocardial infarctions are most often a result of an occlusion of the _____ coronary artery.

Accepted Answer

A)  left 
B)  right 
A)  left 
B)  right

Question 10

Which of the following leads should be used to view the right ventricle?

Accepted Answer

A)  V3 
B)  V7 
C)  V4R 
D)  V6 
A)  V3 
B)  V7 
C)  V4R 
D)  V6

Question 11

Explain the meaning of the letters in aVR,aVL,and aVF.

Accepted Answer

The a in aVR,aVL,and aVF refers to augme

Question 12

Lead I is perpendicular to lead _____.

Accepted Answer

A)  II 
B)  III 
C)  aVF 
D)  aVL 
A)  II 
B)  III 
C)  aVF 
D)  aVL

Question 13

An abnormal (i.e.,pathologic)Q wave indicates the presence of dead myocardial tissue.

Accepted Answer

A) True 
 B)False

Question 14

Which leads look at adjoining tissue in the inferior region of the left ventricle?

Accepted Answer

A)  I,aVL 
B)  V1,V2 
C)  V3,V4,V5 
D)  II,III,aVF 
A)  I,aVL 
B)  V1,V2 
C)  V3,V4,V5 
D)  II,III,aVF

Question 15

Lead V5views the _____ wall of the left ventricle.

Accepted Answer

A)  lateral 
B)  anterior 
C)  posterior 
D)  inferior 
A)  lateral 
B)  anterior 
C)  posterior 
D)  inferior

Question 16

Where should the positive electrode for lead V1 be positioned?

Accepted Answer

A)  Right side of the sternum,fourth intercostal space 
B)  Left midaxillary line at the same level as V4 
C)  Left side of the sternum,fourth intercostal space 
D)  Left anterior axillary line at the same level as V4 
A)  Right side of the sternum,fourth intercostal space 
B)  Left midaxillary line at the same level as V4 
C)  Left side of the sternum,fourth intercostal space 
D)  Left anterior axillary line at the same level as V4

Question 17

Which leads face the septum?

Accepted Answer

A)  II,aVF 
B)  V1,V2 
C)  V5,V6 
D)  I,aVL 
A)  II,aVF 
B)  V1,V2 
C)  V5,V6 
D)  I,aVL

Question 18

The inferior wall of the left ventricle is supplied by the _____ coronary artery in most of the population.

Accepted Answer

A)  left 
B)  right 
A)  left 
B)  right

Question 19

Normal electrical axis lies between _____ degrees.

Accepted Answer

A)  -30 and +90 
B)  +90 and +180 
C)  -91 and -180 
D)  -1 and -90 
A)  -30 and +90 
B)  +90 and +180 
C)  -91 and -180 
D)  -1 and -90

Question 20

A standard 12-lead ECG provides views of the heart in _____.

Accepted Answer

A)  the frontal plane only 
B)  the sagittal plane only 
C)  the horizontal plane only 
D)  both the frontal and the horizontal planes 
A)  the frontal plane only 
B)  the sagittal plane only 
C)  the horizontal plane only 
D)  both the frontal and the horizontal planes

What two factors determine the portion of the heart that each lead "sees"?

Where should the positive electrode for lead V₅ be positioned?

Acute coronary syndromes consist of three major syndromes that are related.List the three syndromes.

An ECG machine's sensitivity must be calibrated so that a 1-millivolt electrical signal will produce a deflection measuring exactly _____ mm tall.

Placement of right chest leads is identical to the standard chest leads except on the right side of the chest.

Lead V₃ views the _____ wall of the left ventricle.

Describe the appearance of a pathologic Q wave.

The coronary arteries originate at the base of the _____.

Anterior or lateral wall myocardial infarctions are most often a result of an occlusion of the _____ coronary artery.

Which of the following leads should be used to view the right ventricle?

Explain the meaning of the letters in aVR,aVL,and aVF.

Lead I is perpendicular to lead _____.

An abnormal (i.e.,pathologic)Q wave indicates the presence of dead myocardial tissue.

Which leads look at adjoining tissue in the inferior region of the left ventricle?

Lead V₅views the _____ wall of the left ventricle.

Where should the positive electrode for lead V₁ be positioned?

Which leads face the septum?

The inferior wall of the left ventricle is supplied by the _____ coronary artery in most of the population.

Normal electrical axis lies between _____ degrees.

A standard 12-lead ECG provides views of the heart in _____.

Anatomy and Physiology

Basic Electrophysiology

Sinus Mechanisms

Atrial Rhythms

Junctional Rhythms

Ventricular Rhythms

Heart Blocks

Pacemaker Rhythms

Post-Test

Filters

Exam 9: Introduction to the 12-Lead ECG

What two factors determine the portion of the heart that each lead "sees"?

Where should the positive electrode for lead V5 be positioned?

Acute coronary syndromes consist of three major syndromes that are related.List the three syndromes.

An ECG machine's sensitivity must be calibrated so that a 1-millivolt electrical signal will produce a deflection measuring exactly _____ mm tall.

Placement of right chest leads is identical to the standard chest leads except on the right side of the chest.

Lead V3 views the _____ wall of the left ventricle.

Describe the appearance of a pathologic Q wave.

The coronary arteries originate at the base of the _____.

Anterior or lateral wall myocardial infarctions are most often a result of an occlusion of the _____ coronary artery.

Which of the following leads should be used to view the right ventricle?

Explain the meaning of the letters in aVR,aVL,and aVF.

Lead I is perpendicular to lead _____.

An abnormal (i.e.,pathologic)Q wave indicates the presence of dead myocardial tissue.

Which leads look at adjoining tissue in the inferior region of the left ventricle?

Lead V5views the _____ wall of the left ventricle.

Where should the positive electrode for lead V1 be positioned?

Which leads face the septum?

The inferior wall of the left ventricle is supplied by the _____ coronary artery in most of the population.

Normal electrical axis lies between _____ degrees.

A standard 12-lead ECG provides views of the heart in _____.

Anatomy and Physiology

Basic Electrophysiology

Sinus Mechanisms

Atrial Rhythms

Junctional Rhythms

Ventricular Rhythms

Heart Blocks

Pacemaker Rhythms

Post-Test

Filters

Where should the positive electrode for lead V₅ be positioned?

Lead V₃ views the _____ wall of the left ventricle.

Lead V₅views the _____ wall of the left ventricle.

Where should the positive electrode for lead V₁ be positioned?