Deck 3: Analyzing Ekg Rhythm Strips

Question 1

P waves usually appear before:

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

Answer 1

B

Question 2

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

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

Answer 2

C

Question 3

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

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

Answer 3

B

Question 4

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

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

Question 5

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

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

Question 6

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

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

Question 7

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

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

Question 8

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?

A)SA node
B)Atria
C)AV node
D)Ventricles

Question 9

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

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

Question 10

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

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

Question 11

The heart's normal rhythm usually originates in the:

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

Question 12

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

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

Question 13

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

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

Question 14

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

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

Question 15

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:

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

Question 16

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

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

Question 17

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

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