Question 1

The cardiac activity that takes place above the ventricles is referred to as _ activity.

Accepted Answer

A) infraventricular 
B) supraventricular 
C) AV nodal 
D) precipitating B

Question 2

Which part of the conduction system has the slowest conduction speed, and is thus responsible for slowing down impulses until the heart is ready to receive them?

Accepted Answer

A) SA node 
B) AV node 
C) ventricles 
D) atria B

Question 3

The P waves are the first waves you should look for when analyzing a rhythm strip because:

Accepted Answer

A) they are usually very regular and thus easy to find. 
B) they are the most important for diagnosing heart disease. 
C) they always have a constant relationship with the waves around them. 
D) they are the biggest and thus most visible. A

Question 4

If a rhythm is IRREGULAR, the best way to determine rate is to:

Accepted Answer

A) count the number of large squares between two R waves and divide that into 300. 
B) use a rate meter. 
C) count the number of QRS complexes in a 6- sec.strip and multiply by 10. 
D) count the number of small squares between two R waves and divide that into 1500.

Question 5

A Normal Sinus Rhythm should have a QRS of less than sec.

Accepted Answer

A) 0.12 
B) 0.22 
C) 0.18 
D) 0.20

Question 6

The heart's normal rhythm usually originates in the:

Accepted Answer

A) AV node. 
B) SA node. 
C) ventricle. 
D) atria.

Question 7

If a rhythm is regular, the MOST accurate way to calculate heart rate is to count the number of small squares between two R waves and divide the total into:

Accepted Answer

A) 1300. 
B) 60. 
C) 1500. 
D) 150.

Question 8

A rhythm that is "regularly irregular" would describe a rhythm that:

Accepted Answer

A) is irregular sometimes but not others. 
B) is chaotic in its irregularity. 
C) is consistently irregular every time you see it. 
D) has a pattern to its irregularity.

Question 9

P waves usually appear before:

Accepted Answer

A) T waves. 
B) upright waves. 
C) PR intervals. 
D) QRS complexes.

Question 10

The QRS complex is indicative of ventricular and thus should correspond to the patient's pulse.

Accepted Answer

A) irritability 
B) depolarization 
C) recovery 
D) failure

Question 11

The standard systematic approach to arrhythmia interpretation consists of all of the following EXCEPT:

Accepted Answer

A) P waves and PR interval. 
B) QRS complex. 
C) refractory periods. 
D) heart rate and rhythm.

Question 12

If a QRS complex measures less than 0.12 sec., you know that it did NOT originate in the:

Accepted Answer

A) SA node. 
B) AV junction. 
C) atria. 
D) ventricles.

Question 13

Which of the following is the LEAST accurate way to determine heart rate?

Accepted Answer

A) Count the number of large squares between two R waves and divide that into 300. 
B) Use a rate meter. 
C) Count the number of QRS complexes in a 6- sec.strip and multiply by 10. 
D) Count the number of small squares between two R waves and divide that into 1500.

Question 14

A major EKG finding that can help you distinguish between supraventricular and ventricular rhythms is the width of the:

Accepted Answer

A) P- P interval. 
B) QRS complex. 
C) T wave. 
D) P wave.

Question 15

To find out if a rhythm is regular or irregular, measure the across the entire strip.

Accepted Answer

A) QRS complexes 
B) PR intervals 
C) R- R intervals 
D) PR segments

Question 16

Which of the following best describes a "lost" P wave?

Accepted Answer

A) One that is visible but highly irregular. 
B) One that is obscured because it falls on other waves. 
C) One that is there one minute but gone the next. 
D) One that can't be counted because it happens too quickly.

Question 17

When a P wave originates in the SA node, it is expected to be smooth, rounded, and in Lead II.

Accepted Answer

A) upright 
B) inverted 
C) biphasic 
D) notched

Exam 3: Analyzing Ekg Rhythm Strips