Question 1

The PR segment is a flat line located between the QRS complex and the T wave.

Accepted Answer

A) True 
 B)False

Question 2

A negative deflection that occurs before a positive one is labeled a ________ wave.

Accepted Answer

The answer of A negative deflection that occurs before a...

Question 3

A QRS complex with one positive deflection followed by one negative deflection would be labeled

Accepted Answer

A) RS. 
B) QS. 
C) QR. 
D) RR'. 
A) RS. 
B) QS. 
C) QR. 
D) RR'.

Question 4

Which of the following correctly describes the relative refractory period?

Accepted Answer

A) It is the period in which even a weak impulse can cause another depolarization. 
B) It is the period in which only a strong impulse can cause another depolarization. 
C) It is the period in which no impulses at all can cause another depolarization. 
D) It is the period in which the heart function stops temporarily to allow impulse transmission to occur. 
A) It is the period in which even a weak impulse can cause another depolarization. 
B) It is the period in which only a strong impulse can cause another depolarization. 
C) It is the period in which no impulses at all can cause another depolarization. 
D) It is the period in which the heart function stops temporarily to allow impulse transmission to occur.

Question 5

Which of the following is NOT true?

Accepted Answer

A) Cardiac cells can contract without having been depolarized. 
B) Cardiac cells must be depolarized before they can contract. 
C) Cardiac contraction occurs as a result of phase 0 of the action potential. 
D) Cardiac contraction requires the presence of calcium ions. 
A) Cardiac cells can contract without having been depolarized. 
B) Cardiac cells must be depolarized before they can contract. 
C) Cardiac contraction occurs as a result of phase 0 of the action potential. 
D) Cardiac contraction requires the presence of calcium ions.

Question 6

The term repolarization refers to the

Accepted Answer

A) heart's mechanical activity. 
B) brain's electrical activity. 
C) heart's electrical activity. 
D) heart's electrical and mechanical activity. 
A) heart's mechanical activity. 
B) brain's electrical activity. 
C) heart's electrical activity. 
D) heart's electrical and mechanical activity.

Question 7

Which of these statements about the sinus node is FALSE?

Accepted Answer

A) It is the normal pacemaker of the heart. 
B) It has the fastest inherent rate of all the possible pacemaker sites. 
C) It is the slowest pacemaker of the heart. 
D) It fires at an inherent rate of 60-100 beats per minute. 
A) It is the normal pacemaker of the heart. 
B) It has the fastest inherent rate of all the possible pacemaker sites. 
C) It is the slowest pacemaker of the heart. 
D) It fires at an inherent rate of 60-100 beats per minute.

Question 8

Depolarization is a(n)

Accepted Answer

A) electrical event that should result in muscle relaxation. 
B) mechanical event that should result in depolarization. 
C) electrical event that should result in muscle contraction. 
D) mechanical event that should result in repolarization. 
A) electrical event that should result in muscle relaxation. 
B) mechanical event that should result in depolarization. 
C) electrical event that should result in muscle contraction. 
D) mechanical event that should result in repolarization.

Question 9

Atrial depolarization is represented on the EKG as a ________.

Accepted Answer

The answer of Atrial depolarization is represented on the EKG...

Question 10

On a rhythm strip,the P wave is normally

Accepted Answer

A) spiked. 
B) small. 
C) inverted. 
D) last. 
A) spiked. 
B) small. 
C) inverted. 
D) last.

Question 11

The PR interval measures the time it takes for the impulse to travel from the atrium down to the ventricle.

Accepted Answer

A) True 
 B)False

Question 12

If a pacemaker becomes irritable and fires at a faster than normal rate,________ will occur.

Accepted Answer

A) escape 
B) usurpation 
C) cardiac block 
D) refraction 
A) escape 
B) usurpation 
C) cardiac block 
D) refraction

Question 13

Which of the following ions has a direct effect on ventricular muscle contraction?

Accepted Answer

A) Sodium 
B) Potassium 
C) Magnesium 
D) Calcium 
A) Sodium 
B) Potassium 
C) Magnesium 
D) Calcium

Question 14

If the sinus node,atria,and AV node all fail,the heart rate will be between

Accepted Answer

A) 40 to 60 beats per minute. 
B) 20 to 40 beats per minute. 
C) 10 to 20 beats per minute. 
D) 60 to 100 beats per minute. 
A) 40 to 60 beats per minute. 
B) 20 to 40 beats per minute. 
C) 10 to 20 beats per minute. 
D) 60 to 100 beats per minute.

Question 15

An upward deflection of the QRS complex is called a(n)

Accepted Answer

A) P wave. 
B) Q wave. 
C) R wave. 
D) T wave. 
A) P wave. 
B) Q wave. 
C) R wave. 
D) T wave.

Question 16

A QRS complex that has both an R and an R' wave will have

Accepted Answer

A) one positive deflection. 
B) two positive deflections. 
C) one negative deflection. 
D) two negative deflections. 
A) one positive deflection. 
B) two positive deflections. 
C) one negative deflection. 
D) two negative deflections.

Question 17

In the action potential,phase 3 is

Accepted Answer

A) depolarization. 
B) rapid repolarization. 
C) plateau. 
D) rest. 
A) depolarization. 
B) rapid repolarization. 
C) plateau. 
D) rest.

Question 18

The cardiac cell at rest has what kind of electrical charge?

Accepted Answer

A) Positive charge 
B) Negative charge 
C) Neutral charge 
D) No charge at all 
A) Positive charge 
B) Negative charge 
C) Neutral charge 
D) No charge at all

Question 19

The PR interval measures the time it takes for the impulse to travel from the

Accepted Answer

A) AV node to the bundle branches. 
B) bundle of His to the ventricular myocardium. 
C) sinus node to the internodal tracts. 
D) atria to the ventricle. 
A) AV node to the bundle branches. 
B) bundle of His to the ventricular myocardium. 
C) sinus node to the internodal tracts. 
D) atria to the ventricle.

Question 20

A beat that appears on the rhythm strip after a long pause and causes a slower rhythm than the normal rhythm is called a(n)

Accepted Answer

A) usurpation beat. 
B) irritable beat. 
C) escape beat. 
D) pacemaker beat. 
A) usurpation beat. 
B) irritable beat. 
C) escape beat. 
D) pacemaker beat.

The PR segment is a flat line located between the QRS complex and the T wave.

A negative deflection that occurs before a positive one is labeled a ________ wave.

A QRS complex with one positive deflection followed by one negative deflection would be labeled

Which of the following correctly describes the relative refractory period?

Which of the following is NOT true?

The term repolarization refers to the

Which of these statements about the sinus node is FALSE?

Depolarization is a(n)

Atrial depolarization is represented on the EKG as a ________.

On a rhythm strip,the P wave is normally

The PR interval measures the time it takes for the impulse to travel from the atrium down to the ventricle.

If a pacemaker becomes irritable and fires at a faster than normal rate,________ will occur.

Which of the following ions has a direct effect on ventricular muscle contraction?

If the sinus node,atria,and AV node all fail,the heart rate will be between

An upward deflection of the QRS complex is called a(n)

A QRS complex that has both an R and an R' wave will have

In the action potential,phase 3 is

The cardiac cell at rest has what kind of electrical charge?

The PR interval measures the time it takes for the impulse to travel from the

A beat that appears on the rhythm strip after a long pause and causes a slower rhythm than the normal rhythm is called a(n)

Cardiac Anatomy and Physiology

Lead Morphology and Placement

Technical Aspects of the EKG

Calculating Heart Rate

How to Interpret a Rhythm Strip

Rhythms Originating in the Sinus Node

Rhythms Originating in the Atria

Rhythms Originating in the AV Junction

Rhythms Originating in the Ventricles

AV Blocks

How to Interpret a 12-Lead EKG

Myocardial Infarction

Medications and Electrical Therapy

Diagnostic Electrocardiography

Filters

Exam 2: Electrophysiology

The PR segment is a flat line located between the QRS complex and the T wave.

A negative deflection that occurs before a positive one is labeled a ________ wave.

A QRS complex with one positive deflection followed by one negative deflection would be labeled

Which of the following correctly describes the relative refractory period?

Which of the following is NOT true?

The term repolarization refers to the

Which of these statements about the sinus node is FALSE?

Depolarization is a(n)

Atrial depolarization is represented on the EKG as a ________.

On a rhythm strip,the P wave is normally

The PR interval measures the time it takes for the impulse to travel from the atrium down to the ventricle.

If a pacemaker becomes irritable and fires at a faster than normal rate,________ will occur.

Which of the following ions has a direct effect on ventricular muscle contraction?

If the sinus node,atria,and AV node all fail,the heart rate will be between

An upward deflection of the QRS complex is called a(n)

A QRS complex that has both an R and an R' wave will have

In the action potential,phase 3 is

The cardiac cell at rest has what kind of electrical charge?

The PR interval measures the time it takes for the impulse to travel from the

A beat that appears on the rhythm strip after a long pause and causes a slower rhythm than the normal rhythm is called a(n)

Cardiac Anatomy and Physiology

Lead Morphology and Placement

Technical Aspects of the EKG

Calculating Heart Rate

How to Interpret a Rhythm Strip

Rhythms Originating in the Sinus Node

Rhythms Originating in the Atria

Rhythms Originating in the AV Junction

Rhythms Originating in the Ventricles

AV Blocks

How to Interpret a 12-Lead EKG

Myocardial Infarction

Medications and Electrical Therapy

Diagnostic Electrocardiography

Filters