Deck 11: Introducing the Heart Block Rhythms

Question 1

This rhythm has a PR interval that gets progressively longer until a P wave fails to conduct, resulting in a dropped QRS complex.

A) First degree
B) Second degree type I
C) Second degree type II
D) Third degree

Answer 1

B

Question 2

Which of the following blocks is most often irregular?

A) First degree
B) Second degree type II
C) Third degree
D) All of the above

Answer 2

B

Question 3

This rhythm is not a true block; there is a delay at the AV node, and each impulse is eventually conducted.

A) First degree
B) Second degree type I
C) Second degree type II
D) Third degree

Answer 3

A

Question 4

With first-degree AV block:

A) the PR intervals are less than 0.20 seconds.
B) the P waves are inverted.
C) the PR intervals are greater than 0.20 seconds.
D) not all the P waves are followed by a QRS.

Question 5

This rhythm has a complete block at or below the AV node and there is no relationship between the P waves and the QRS complex.

A) First degree
B) Second degree type I
C) Second degree type 2
D) Third degree

Question 6

The second-degree type I heart block is also known as the:

A) Beasley phenomenon.
B) His phenomenon.
C) Purkinje phenomenon.
D) Wenckebach phenomenon.

Question 7

Wenckebach differs from complete heart block in that complete heart block usually has:

A) a faster rate.
B) no QRS.
C) a constant PR interval.
D) a regular R to R interval.
E) None of the above

Question 8

The other characteristic in second-degree type I block is that the impulse is not conducted and the ________ is dropped.

A) QRS
B) PVC
C) ST
D) AED

Question 9

Heart blocks are:

A) early ectopic beats that originate outside the SA node.
B) partial delay or complete interruptions in the cardiac conduction pathway between the atria and ventricles.
C) a shifting of the pacemaker site between the SA node, atria, and/or AV junction.
D) the result of accessory conduction pathways between the atria and ventricles.

Question 10

The heart block rhythm that most closely resembles a normal sinus rhythm is a:

A) third-degree block.
B) first-degree block.
C) second-degree block, type I.
D) second-degree block, type II.

Question 11

AV dissociation is associated with the ________ degree block.

A) third-
B) second-
C) first-
D) fourth-

Question 12

The rhythm that occurs when there is an intermittent interruption in the electrical conduction system near or below the AV Junction is:

A) first-degree block.
B) second-degree block type I.
C) second-degree block type II.
D) third-degree block.

Question 13

Second-degree block is also known as:

A) Mobitz type 4.
B) Mobitz type 5.
C) Mobitz type 1.
D) Mobitz type 3.

Question 14

A prolonged PR interval is the hallmark of ________ degree block and is most commonly the only variation in the EKG strip.

A) first-
B) second-
C) third-
D) fourth-

Question 15

An EKG rhythm that has no correlation between the P waves and the QRS complexes is:

A) first-degree block.
B) second-degree block type I.
C) second-degree block type II.
D) third-degree block.

Question 16

All the parameters with a first-degree block are within normal limits EXCEPT:

A) heart rate.
B) rhythm.
C) PR interval.
D) QRS interval.

Question 17

With a second-degree block, type I, the PR intervals:

A) get progressively shorter.
B) get progressively longer.
C) are all the same at 0.20.
D) are all inverted.

Question 18

The second-degree block, type II, represents a complete block of:

A) one of the bundle branches and a partial block of the other branch.
B) both of the bundle branches and partial block of the bundle of His.
C) all of the intranodal pathways and the AV node.
D) the AV node as well as a partial block of the SA node.

Question 19

With second-degree block, type II:

A) the P waves are all inverted.
B) a QRS complex follows each P wave.
C) the pacemaker site is in the AV junction.
D) the ventricular rate is less than the atrial rate.

Question 20

The most usual form of block results from excessive conduction delay in the AV node and is termed:

A) first-degree block.
B) second-degree block type I.
C) second-degree block type II.
D) third-degree block.

Question 21

The treatment for a patient with a third-degree block and that is hemodynamically unstable is:

A) synchronized cardioversion.
B) transcutaneous pacing.
C) defibrillation.
D) endotracheal intubation.