EP Quiz From EP Lab Digest

EP Quiz From EP Lab Digest

Question 1 

Which of the following is true about the fossa ovalis?

a)It is an embryologic remnant that may be responsible for the initiation of atrial fibrillation

b)It was the foramen ovale prior to birth

c)It is also called the crista terminalis

d)It forms a portion of the Triangle of Koch

Question 2

Where does the bundle of His divide into?

a)The posteroinferior division of the left bundle branch

b)The anterosuperior division of the left bundle branch

c)The right bundle branch

d)All of the above

Question 3

What does the level of treshold potential determine?

a)How easily an impulse is able to excite a cell

b)The level of magnesium required to successfully cause depolarization

c)The type of antiarrhythmic drug required to suppress ventricular rhythms

d)How many phases are present in an action potential for repolarization to occur

Question 4

What occurs during phase 1 of the action potential?

a)Potassium exits the cell via the transient outward current I k to

b)The action of the slow inward calcium current occurs

c)Sodium enters the cell

d)Potassium enters the cell

Question 5

What does refractoriness refer to?

a)A state of cell contractility

b)A state of cell inexcitability

c)Conductivity

d)None of the above

Question 6

The following EKG shows:

a)Right bundle branch block

b)Right axis deviation

c)Left anterior hemiblock

d)Left bundle branch block

Question 7

Ventricular activation time is measured:

a)From the beginning of the Q wave to the end of the S

b)From the beginning of the QRS to the end of the T wave

c)From the beginning of the QRS to the onset of the intrinsicoid deflection

d)From the beginning of the P wave to the beginning of the QRS

Question 8

What of the following is true about the left atrial appendage?

a)It is an area of stagnant blood flow where clots are known to form

b)It is the region where the pulmonary veins insert

c)None of the above

d)a and b

Question 9

A blockage of one of the divisions of the left bundle branch is called:

a)A hemiblock

b)Altered automaticity

c)Reentry

d)AV Block

Question 10

Components of the interventricular conduction system include:

a)The bundle of His, Bachmann's bundle, and the AV node

b)The slow and fast AV nodal pathways, the bundle of His, and the Purkinje fibers

c)The bundle of His, the right and left bundle branches, and the Purkinje fibers

d)The bundle of His, the right bundle branch, and the Purkinje fibers

Answer Key

1 (b)It was the foramen ovale prior to birth 

2 (d)All of the above

3 (a)How easily an impulse is able to excite a cell

4 (a)Potassium exits the cell via the transient outward current I k to

5 (b)A state of cell inexcitability

6 (a)Right bundle branch block

7 (b)From the beginning of the QRS to the onset of the intrinsicoid deflection

8 (d)a and b

9 (a)A hemiblock

10 (c)The bundle of His, the right and left bundle branches, and the Purkinje fibers

Linda Moulton RN MS

Owner Critical Care ED and CCE Consulting

Faculty Order And Disorder Electrophysiology

Training Program

New Berlin, Illinois