Question 1

What term describes heart cells that have the ability to spontaneously depolarize?

Accepted Answer

A)  Systole 
B)  Purkinje 
C)  Automaticity 
D)  Myocardiocity 
A)  Systole 
B)  Purkinje 
C)  Automaticity 
D)  Myocardiocity C

Question 2

What is represented by the P wave on the ECG tracing?

Accepted Answer

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

Question 3

Which chamber of the heart initially receives deoxygenated blood from the vena cava?

Accepted Answer

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

Question 4

Which of the following dysrhythmias represents a dissociation of the mechanical and electrical activities of the heart?

Accepted Answer

A)  Asystole 
B)  AV block 
C)  Bradycardia 
D)  Pulseless electrical activity (PE
A)  
A)  Asystole 
B)  AV block 
C)  Bradycardia 
D)  Pulseless electrical activity (PE
A)

Question 5

What term describes the sudden loss of the negative charge inside the myocardial cells?

Accepted Answer

A)  Repolarization 
B)  Depolarization 
C)  Automaticity 
D)  Conductivity 
A)  Repolarization 
B)  Depolarization 
C)  Automaticity 
D)  Conductivity

Question 6

What problem is indicated by elevation of the ST segment?

Accepted Answer

A)  Heart block 
B)  Myocardial ischemia 
C)  Elevation of serum potassium 
D)  Depletion of serum potassium 
A)  Heart block 
B)  Myocardial ischemia 
C)  Elevation of serum potassium 
D)  Depletion of serum potassium

Question 7

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 8

At what speed does the paper travel through the ECG machine?

Accepted Answer

A)  25 mm/s 
B)  30 mm/s 
C)  40 mm/s 
D)  50 mm/s 
A)  25 mm/s 
B)  30 mm/s 
C)  40 mm/s 
D)  50 mm/s

Question 9

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 10

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 11

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.

Question 12

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 13

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 14

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 15

Where does the normal electrical impulse originate for each heartbeat?

Accepted Answer

A)  Atrioventricular (AV) node 
B)  Sinoatrial (S
A)  node 
C)  Bundle of His 
D)  Right bundle branch 
A)  Atrioventricular (AV) node 
B)  Sinoatrial (S
A)  node 
C)  Bundle of His 
D)  Right bundle branch

Question 16

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

Question 17

What is the upper limit of normal for the width of a normal Q wave?

Accepted Answer

A)  0.08 s 
B)  0.04 s 
C)  1.2 s 
D)  1.4 s 
A)  0.08 s 
B)  0.04 s 
C)  1.2 s 
D)  1.4 s

Question 18

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 19

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

Accepted Answer

A)  0.5 s 
B)  1 s 
C)  3 s 
D)  5 s 
A)  0.5 s 
B)  1 s 
C)  3 s 
D)  5 s

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

Exam 11: Interpretation of the Electrocardiogram

What term describes heart cells that have the ability to spontaneously depolarize?

What is represented by the P wave on the ECG tracing?

Which chamber of the heart initially receives deoxygenated blood from the vena cava?

Which of the following dysrhythmias represents a dissociation of the mechanical and electrical activities of the heart?

What term describes the sudden loss of the negative charge inside the myocardial cells?

What problem is indicated by elevation of the ST segment?

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

At what speed does the paper travel through the ECG machine?

Why is an ECG tracing so useful?

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

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

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

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

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

Where does the normal electrical impulse originate for each heartbeat?

What does the QRS complex represent?

What is the upper limit of normal for the width of a normal Q wave?

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

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 of the Respiratory Care Patient

Clinical Laboratory Studies

Interpretation of Blood Gases

Pulmonary Function Testing

Clinical Application of the Chest Radiograph

Assessment of the Neonatal and Pediatric Patient

Assessment of the Older Patient

Respiratory Monitoring in the Intensive Care Unit

Assessment of Cardiac Output

Assessment of Hemodynamic Pressures

Flexible Fiber-Optic Bronchoscopy

Nutritional Assessment of Patients With Respiratory Disease

Assessment of Sleep and Breathing

Assessment of the Home Care Patient

Documentation of the Patient Assessment

Filters

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