Question 1

What does the QRS complex represent?

Accepted Answer

A) Depolarization of the atria 
B) Repolarization of the atria 
C) Depolarization of the ventricles 
D) Repolarization of the ventricles 
A) Depolarization of the atria 
B) Repolarization of the atria 
C) Depolarization of the ventricles 
D) Repolarization of the ventricles C

Question 2

Which of the following symptoms is least suggestive of the need for an ECG?

Accepted Answer

A) Fever 
B) Orthopnea 
C) Chest pain 
D) Fainting spells 
A) Fever 
B) Orthopnea 
C) Chest pain 
D) Fainting spells A

Question 3

Which of the following is a hallmark of a premature ventricular contraction (PVC)?

Accepted Answer

A) The QRS complex is early but normal in appearance. 
B) The QRS complex is wider than normal. 
C) There is a P wave in front of the QRS complex. 
D) The T wave moves in the same direction as the QRS complex. 
A) The QRS complex is early but normal in appearance. 
B) The QRS complex is wider than normal. 
C) There is a P wave in front of the QRS complex. 
D) The T wave moves in the same direction as the QRS complex. B

Question 4

What term applies to any heartbeat that originates outside the SA node?

Accepted Answer

A) Ectopic impulse 
B) Aberrant impulse 
C) Eccentric impulse 
D) Recurrent impulse 
A) Ectopic impulse 
B) Aberrant impulse 
C) Eccentric impulse 
D) Recurrent impulse

Question 5

What axis change is common in patients with chronic pulmonary hypertension?

Accepted Answer

A) Left axis deviation 
B) Right axis deviation 
C) Inverted axis deviation 
D) Extreme left axis deviation 
A) Left axis deviation 
B) Right axis deviation 
C) Inverted axis deviation 
D) Extreme left axis deviation

Question 6

What is considered to be the normal position of the axis in a healthy patient's heart?

Accepted Answer

A) 0 to -90 degrees 
B) 0 to 90 degrees 
C) 60 to 120 degrees 
D) 120 to 180 degrees 
A) 0 to -90 degrees 
B) 0 to 90 degrees 
C) 60 to 120 degrees 
D) 120 to 180 degrees

Question 7

In the terminology for three of the limb leads-aVR, aVL, and aVF-what does the letter "A" stand for?

Accepted Answer

A) Atrial 
B) Assisted 
C) Ambient 
D) Augmented 
A) Atrial 
B) Assisted 
C) Ambient 
D) Augmented

Question 8

Why is the electrical signal delayed slightly at the AV node? 1.To allow better filling of the ventricles
2)To protect the ventricles against excessively rapid atrial rates
3)To provide time for atrial contraction prior to ventricular systole
4)To prevent premature atrial beats from reaching the ventricles

Accepted Answer

A) 1, 3 
B) 2, 4 
C) 1, 2 
D) 1, 2, 3, 4 
A) 1, 3 
B) 2, 4 
C) 1, 2 
D) 1, 2, 3, 4

Question 9

Which of the following would describe the ECG of a patient with atrial fibrillation?

Accepted Answer

A) Regular ventricular response 
B) Large bizarre QRS complexes 
C) Chaotic baseline between QRS complexes 
D) No identifiable QRS complexes 
A) Regular ventricular response 
B) Large bizarre QRS complexes 
C) Chaotic baseline between QRS complexes 
D) No identifiable QRS complexes

Question 10

Which of the following are associated with the onset of dysrhythmias? 1.Hypoxia
2)Electrolyte imbalances
3)Sympathetic stimulation
4)Pulmonary hypertension

Accepted Answer

A) 1, 2 
B) 3, 4 
C) 2, 4 
D) 1, 2, 3 
A) 1, 2 
B) 3, 4 
C) 2, 4 
D) 1, 2, 3

Question 11

A patient complaining of chest pain that has not been relieved by nitroglycerin should be treated with all of the following except:

Accepted Answer

A) oxygen therapy 
B) thrombolytic therapy 
C) stress testing 
D) surgical intervention 
A) oxygen therapy 
B) thrombolytic therapy 
C) stress testing 
D) surgical intervention

Question 12

What dysrhythmia often follows sustained ventricular tachycardia?

Accepted Answer

A) Heart block 
B) Atrial fibrillation 
C) Elevated ST segments 
D) Ventricular fibrillation 
A) Heart block 
B) Atrial fibrillation 
C) Elevated ST segments 
D) Ventricular fibrillation

Question 13

Which of the following physiologic effects is associated with myocardial infarction?

Accepted Answer

A) Arterial hypertension 
B) Increased cardiac output 
C) Good blood flow to the brain 
D) Backup of blood into the lungs 
A) Arterial hypertension 
B) Increased cardiac output 
C) Good blood flow to the brain 
D) Backup of blood into the lungs

Question 14

What is the heart rate if the RR interval is five large boxes apart?

Accepted Answer

A) 40 beats/min 
B) 60 beats/min 
C) 90 beats/min 
D) 120 beats/min 
A) 40 beats/min 
B) 60 beats/min 
C) 90 beats/min 
D) 120 beats/min

Question 15

What is indicated by high-voltage R waves in the QRS complex?

Accepted Answer

A) Axis deviation 
B) Atrial enlargement 
C) Myocardial ischemia 
D) Ventricular enlargement 
A) Axis deviation 
B) Atrial enlargement 
C) Myocardial ischemia 
D) Ventricular enlargement

Question 16

What part of the heart is best viewed by the chest leads V₅ and V₆?

Accepted Answer

A) Left atrium 
B) Right atrium 
C) Left ventricle 
D) Right ventricle 
A) Left atrium 
B) Right atrium 
C) Left ventricle 
D) Right ventricle

Question 17

What is the normal range for the PR interval?

Accepted Answer

A) 0.05 to 0.1 second 
B) 0.12 to 0.2 second 
C) 0.2 to 0.35 second 
D) 0.25 to 0.5 second 
A) 0.05 to 0.1 second 
B) 0.12 to 0.2 second 
C) 0.2 to 0.35 second 
D) 0.25 to 0.5 second

Question 18

Why is an ECG tracing so useful?

Accepted Answer

A) It reflects the heart's pumping ability. 
B) It can identify structural abnormalities in the heart. 
C) It can be used to diagnose malfunctioning valves. 
D) It can aid in the diagnosis of cardiac tissue ischemia. 
A) It reflects the heart's pumping ability. 
B) It can identify structural abnormalities in the heart. 
C) It can be used to diagnose malfunctioning valves. 
D) It can aid in the diagnosis of cardiac tissue ischemia.

Question 19

How much time is represented on the horizontal axis of the ECG paper by five large boxes?

Accepted Answer

A) 0.5 second 
B) 1 second 
C) 3 seconds 
D) 5 seconds 
A) 0.5 second 
B) 1 second 
C) 3 seconds 
D) 5 seconds

Question 20

What is the normal progression of abnormalities seen on the ECG for a patient who is having a myocardial infarction?

Accepted Answer

A) ST elevation followed by large Q waves 
B) ST depression followed by large Q waves 
C) Large Q waves, ST elevation, followed by ST depression 
D) ST depression, large Q waves, and then ST segment elevation 
A) ST elevation followed by large Q waves 
B) ST depression followed by large Q waves 
C) Large Q waves, ST elevation, followed by ST depression 
D) ST depression, large Q waves, and then ST segment elevation

What does the QRS complex represent?

Which of the following symptoms is least suggestive of the need for an ECG?

Which of the following is a hallmark of a premature ventricular contraction (PVC)?

What term applies to any heartbeat that originates outside the SA node?

What axis change is common in patients with chronic pulmonary hypertension?

What is considered to be the normal position of the axis in a healthy patient's heart?

In the terminology for three of the limb leads-aVR, aVL, and aVF-what does the letter "A" stand for?

Which of the following would describe the ECG of a patient with atrial fibrillation?

Which of the following are associated with the onset of dysrhythmias? 1.Hypoxia 2)Electrolyte imbalances 3)Sympathetic stimulation 4)Pulmonary hypertension

A patient complaining of chest pain that has not been relieved by nitroglycerin should be treated with all of the following except:

What dysrhythmia often follows sustained ventricular tachycardia?

Which of the following physiologic effects is associated with myocardial infarction?

What is the heart rate if the RR interval is five large boxes apart?

What is indicated by high-voltage R waves in the QRS complex?

What part of the heart is best viewed by the chest leads V₅ and V₆?

What is the normal range for the PR interval?

Why is an ECG tracing so useful?

How much time is represented on the horizontal axis of the ECG paper by five large boxes?

What is the normal progression of abnormalities seen on the ECG for a patient who is having a myocardial infarction?

Preparing for the Patient Encounter

The Medical History and the Interview

Cardiopulmonary Symptoms

Vital Signs

Fundamentals of Physical Examination

Neurologic Assessment

Clinical Laboratory Studies

Interpretation of Blood Gases

Pulmonary Function Testing

Chest Imaging

Neonatal and Pediatric Assessment

Older Patient Assessment

Respiratory Monitoring in Critical Care

Vascular Pressure Monitoring

Cardiac Output Measurement

Bronchoscopy

Nutrition Assessment

Sleep and Breathing Assessment

Home Care Patient Assessment

Documentation

Filters

Exam 11: Interpretation of Electrocardiogram Tracings

What does the QRS complex represent?

Which of the following symptoms is least suggestive of the need for an ECG?

Which of the following is a hallmark of a premature ventricular contraction (PVC)?

What term applies to any heartbeat that originates outside the SA node?

What axis change is common in patients with chronic pulmonary hypertension?

What is considered to be the normal position of the axis in a healthy patient's heart?

In the terminology for three of the limb leads-aVR, aVL, and aVF-what does the letter "A" stand for?

Which of the following would describe the ECG of a patient with atrial fibrillation?

Which of the following are associated with the onset of dysrhythmias? 1.Hypoxia 2)Electrolyte imbalances 3)Sympathetic stimulation 4)Pulmonary hypertension

A patient complaining of chest pain that has not been relieved by nitroglycerin should be treated with all of the following except:

What dysrhythmia often follows sustained ventricular tachycardia?

Which of the following physiologic effects is associated with myocardial infarction?

What is the heart rate if the RR interval is five large boxes apart?

What is indicated by high-voltage R waves in the QRS complex?

What part of the heart is best viewed by the chest leads V₅ and V₆?

What is the normal range for the PR interval?

Why is an ECG tracing so useful?

How much time is represented on the horizontal axis of the ECG paper by five large boxes?

What is the normal progression of abnormalities seen on the ECG for a patient who is having a myocardial infarction?

Preparing for the Patient Encounter

The Medical History and the Interview

Cardiopulmonary Symptoms

Vital Signs

Fundamentals of Physical Examination

Neurologic Assessment

Clinical Laboratory Studies

Interpretation of Blood Gases

Pulmonary Function Testing

Chest Imaging

Neonatal and Pediatric Assessment

Older Patient Assessment

Respiratory Monitoring in Critical Care

Vascular Pressure Monitoring

Cardiac Output Measurement

Bronchoscopy

Nutrition Assessment

Sleep and Breathing Assessment

Home Care Patient Assessment

Documentation

Filters