Chapter 3

Question 1

In sinus arrhythmia, a gradual increasing of the heart rate is usually associated with _____.

Answer 1

inspiration

Question 2

The rate of sinus tachycardia is _____ beats/min.

Answer 2

faster than 100

Question 3

An ECG rhythm strip shows a ventricular rate of 46 bpm, a regular rhythm, a PR interval of 0.14 seconds, a QRS duration of 0.06 seconds, and one upright P wave before each QRS. This rhythm is _____.

Answer 3

sinus bradycardia

Question 4

An ECG rhythm strip shows a ventricular rate of 128 bpm, a regular rhythm, a PR interval of 0.16 seconds, a QRS duration of 0.08 seconds, and one upright P wave before each QRS. This rhythm is sinus _____.

Answer 4

tachycardia

Question 5

Which of the following are possible causes of sinus tachycardia?

Answer 5

Fever, pain, anxiety

Question 6

Which of the following are possible causes of sinus bradycardia?

Answer 6

Increased intracranial pressure, beta-blocker overdose

Question 7

The rate of a sinus rhythm is ____ beats/min.

Answer 7

60 to 100

Question 8

Which of the following may cause a sinus bradycardia?

Answer 8

Hypothermia

Question 9

Which of the following correctly reflects the ECG criteria for a sinus rhythm?

Answer 9

P waves that look alike and upright in lead II, one before each QRS complex

Question 10

Characteristics of sinus rhythm:

Answer 10

Rhythm-R-R and P-P intervals are regular

Rate
60 to 100 beats/min

P waves
Positive (upright) in lead II; one precedes each QRS complex; P waves look alike

PR interval
0.12 to 0.20 seconds and constant from beat to beat

QRS duration
0.11 seconds or less unless abnormally conducted

Question 11

Management of a patient with a sinus tachycardia might include _____.

Answer 11

identification and treatment of the underlying cause

Question 12

The rate of a sinus bradycardia is _____ beats/min.

Answer 12

slower than 60

Question 13

Tachycardia

Answer 13

101-180