Question 1

The ECG can help identify the presence of ischemia, injury, and/or infarction of the heart muscle.

Accepted Answer

A) True 
 B)False  False

Question 2

Leads ______, while located more laterally, may also help identify anterior infarction.

Accepted Answer

A)  V1, V2, V3, and V4 
B)  V5 and V6 
C)  I, aVL, V5, and V6. 
D)  II, III, and aVF. 
A)  V1, V2, V3, and V4 
B)  V5 and V6 
C)  I, aVL, V5, and V6. 
D)  II, III, and aVF. B

Question 3

Leads _________provide the best view for identifying anterior myocardial infarction.

Accepted Answer

A)  V3, and V4 
B)  V5 and V6 
C)  I, aVL, V5, and V6. 
D)  II, III, and aVF. 
A)  V3, and V4 
B)  V5 and V6 
C)  I, aVL, V5, and V6. 
D)  II, III, and aVF. A

Question 4

To use the PR segment to evaluate the degree of displacement of the ST segment from the isoelectric line you measure at a point ____ seconds after the J point.

Accepted Answer

A)  0.02 
B)  0.04 
C)  0.08 
D)  0.12 
A)  0.02 
B)  0.04 
C)  0.08 
D)  0.12

Question 5

Posterior infarctions can be diagnosed by looking for reciprocal changes in leads:

Accepted Answer

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

Question 6

The T wave:

Accepted Answer

A)  is upright and equally round on the upslope and down slope and is oriented in the same direction as the preceding QRS complex. 
B)  is asymmetrical with a more abrupt upslope and is oriented in the same direction as the preceding P wave. 
C)  is slightly asymmetrical and oriented in the same direction as the preceding QRS complex. 
D)  is inverted and asymmetrical. 
A)  is upright and equally round on the upslope and down slope and is oriented in the same direction as the preceding QRS complex. 
B)  is asymmetrical with a more abrupt upslope and is oriented in the same direction as the preceding P wave. 
C)  is slightly asymmetrical and oriented in the same direction as the preceding QRS complex. 
D)  is inverted and asymmetrical.

Question 7

Lateral infarction is identified by ECG changes such as ST segment elevation; T wave inversion; and the development of significant Q waves in leads:

Accepted Answer

A)  V1, V2, V3, and V4 
B)  V5 and V6 
C)  I, aVL, V5, and V6. 
D)  II, III, and aVF. 
A)  V1, V2, V3, and V4 
B)  V5 and V6 
C)  I, aVL, V5, and V6. 
D)  II, III, and aVF.

Question 8

Myocardial ischemia, injury and infarction are reversible.

Accepted Answer

A) True 
 B)False

Question 9

Myocardial _______is a deprivation of oxygen and nutrients to the myocardium but no damage to the cells has occurred.

Accepted Answer

A)  ischemia 
B)  injury 
C)  infarction 
D)  effusion 
A)  ischemia 
B)  injury 
C)  infarction 
D)  effusion

Question 10

Inferior infarction is determined by ECG changes such as ST segment elevation; T wave inversion; and the development of significant Q waves in leads:

Accepted Answer

A)  V4R, V5R and V6R 
B)  V5 and V6 
C)  I, aVL, V5, and V6 
D)  V7, V8, and V9 
A)  V4R, V5R and V6R 
B)  V5 and V6 
C)  I, aVL, V5, and V6 
D)  V7, V8, and V9

Question 11

Often, characteristic ECG changes accompany MI.

Accepted Answer

A) True 
 B)False

Question 12

Pathologic Q waves indicate the presence of:

Accepted Answer

A)  myocardial ischemia. 
B)  subendocardial infarction. 
C)  myocardial injury. 
D)  irreversible myocardial damage or myocardial infarction. 
A)  myocardial ischemia. 
B)  subendocardial infarction. 
C)  myocardial injury. 
D)  irreversible myocardial damage or myocardial infarction.

Question 13

Right ventricular infarction is determined by ECG changes such as ST segment elevation; T wave inversion; and the development of significant Q waves in leads:

Accepted Answer

A)  V7, V8, and V9 
B)  V4R, V5R and V6R 
C)  I, aVL, V5, and V6. 
D)  II, III, and aVF. 
A)  V7, V8, and V9 
B)  V4R, V5R and V6R 
C)  I, aVL, V5, and V6. 
D)  II, III, and aVF.

Question 14

The Q wave:

Accepted Answer

A)  is the second part of the QRS complex. 
B)  is the first upward deflection from the baseline. 
C)  is always present. 
D)  has a duration of less than 0.04 seconds. 
A)  is the second part of the QRS complex. 
B)  is the first upward deflection from the baseline. 
C)  is always present. 
D)  has a duration of less than 0.04 seconds.

Question 15

A flat depression of the ST segment results from:

Accepted Answer

A)  myocardial injury. 
B)  myocardial ischemia. 
C)  subendocardial infarction. 
D)  infarction involving the full thickness of the myocardium. 
A)  myocardial injury. 
B)  myocardial ischemia. 
C)  subendocardial infarction. 
D)  infarction involving the full thickness of the myocardium.

Question 16

The _______ arteries deliver the needed blood supply to the myocardial cells.

Accepted Answer

A)  cerebral 
B)  carotid 
C)  coronary 
D)  brachial 
A)  cerebral 
B)  carotid 
C)  coronary 
D)  brachial

Question 17

Myocardial _______ is the death of myocardial cells.

Accepted Answer

A)  ischemia 
B)  injury 
C)  infarction 
D)  effusion 
A)  ischemia 
B)  injury 
C)  infarction 
D)  effusion

Question 18

ST segment is said to be significant when it is raised more than __ mm above the baseline at a point one small square to the right of the J point in the limb leads.

Accepted Answer

A)  1 
B)  2 
C)  4 
D)  6 
A)  1 
B)  2 
C)  4 
D)  6

Question 19

The J point is the spot that marks the end of the QRS and the beginning of the ST segment.

Accepted Answer

A) True 
 B)False

Question 20

Inferior infarction is determined by ECG changes such as ST segment elevation; T wave inversion; and the development of significant Q waves in leads:

Accepted Answer

A)  V1, V2, V3, and V4 
B)  V5 and V6 
C)  I, aVL, V5, and V6. 
D)  II, III, and aVF. 
A)  V1, V2, V3, and V4 
B)  V5 and V6 
C)  I, aVL, V5, and V6. 
D)  II, III, and aVF.

Exam 20: Myocardial Ischemia and Infarction

The ECG can help identify the presence of ischemia, injury, and/or infarction of the heart muscle.

Leads ______, while located more laterally, may also help identify anterior infarction.

Leads _________provide the best view for identifying anterior myocardial infarction.

To use the PR segment to evaluate the degree of displacement of the ST segment from the isoelectric line you measure at a point ____ seconds after the J point.

Posterior infarctions can be diagnosed by looking for reciprocal changes in leads:

The T wave:

Lateral infarction is identified by ECG changes such as ST segment elevation; T wave inversion; and the development of significant Q waves in leads:

Myocardial ischemia, injury and infarction are reversible.

Myocardial _______is a deprivation of oxygen and nutrients to the myocardium but no damage to the cells has occurred.

Inferior infarction is determined by ECG changes such as ST segment elevation; T wave inversion; and the development of significant Q waves in leads:

Often, characteristic ECG changes accompany MI.

Pathologic Q waves indicate the presence of:

Right ventricular infarction is determined by ECG changes such as ST segment elevation; T wave inversion; and the development of significant Q waves in leads:

The Q wave:

A flat depression of the ST segment results from:

The _______ arteries deliver the needed blood supply to the myocardial cells.

Myocardial _______ is the death of myocardial cells.

ST segment is said to be significant when it is raised more than __ mm above the baseline at a point one small square to the right of the J point in the limb leads.

The J point is the spot that marks the end of the QRS and the beginning of the ST segment.

Inferior infarction is determined by ECG changes such as ST segment elevation; T wave inversion; and the development of significant Q waves in leads:

Anatomy and Electrophysiology of the Heart

The Electrocardiogram

Analyzing the Electrocardiogram

Heart Rate

Regularity

P-Waves

QRS Complexes

PR Intervals

ST Segments, T-Waves, QT Intervals, and U-Waves

Overview of Dysrhythmias

Origin and Clinical Aspects of Sinus Node Dysrhythmias

Origin and Clinical Aspects of Atrial Dysrhythmias

Origin and Clinical Aspects of Junctional Dysrhythmias

Origin and Clinical Aspects of Ventricular Dysrhythmias

Origin and Clinical Aspects of AV Heart Blocks

Pacemakers and Implanted Cardioverter-Defibrillators

12 Lead ECGS

Atrial Enlargement and Ventricular Hypertrophy

Bundle Branch Block

Other Cardiac Conditions and the ECG

Putting It All Together

Filters