Deck 3: Sinus Mechanisms

Question 1

Identify the following rhythm (lead II): ____________________

Answer 1

Sinus tachycardia at 140 beats/min

Question 2

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

A) identification and treatment of the underlying cause
B) administration of atropine
C) use of a pacemaker
D) vagal maneuvers, such as carotid sinus pressure

Answer 2

A
Treatment for sinus tachycardia is directed at correcting the underlying cause (i.e., fluid replacement, relief of pain, removal of offending medications or substances, reducing fever or anxiety). Sinus tachycardia in a patient experiencing an acute myocardial infarction (MI) may be treated with medications to slow the heart rate and decrease myocardial oxygen demand (e.g., beta-blockers), provided there are no signs of heart failure or other contraindications. Atropine is given in bradycardia, pacemakers are used for bradycardia, vagal maneuvers should not be used with sinus tachycardia but maybe used if patient is in SVT or VT depending on waveform.

Question 3

Identify the following rhythm (lead II): ____________________

Answer 3

Sinus rhythm at 70 beats/min

Question 4

Identify the following rhythm (lead II): ____________________

Question 5

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

A) slower than 60
B) 60 to 100
C) 80 to 120
D) faster than 100

Question 6

Identify the following rhythm (lead II): ____________________

Question 7

Identify the following rhythm (lead II): ____________________

Question 8

Which of the following are possible causes of sinus tachycardia?

A) Hypothermia, hypovolemia
B) Hypoxia, calcium channel blocker overdose
C) Fever, pain, anxiety
D) Vomiting, vagal maneuvers

Question 9

Identify the following rhythm (lead II): ____________________

Question 10

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

A) expiration
B) inspiration
C) excessive caffeine intake
D) early signs of heart failure

Question 11

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

A) sinus rhythm
B) sinus bradycardia
C) sinus arrest
D) sinoatrial block

Question 12

Identify the following rhythm (lead II): ____________________

Question 13

The rate of sinus tachycardia is _____ beats/min.

A) slower than 60
B) 40 to 80
C) 60 to 100
D) faster than 100

Question 14

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

A) slower than 60
B) 60 to 100
C) 80 to 120
D) faster than 100

Question 15

Which of the following may cause a sinus bradycardia?

A) Stress or anxiety
B) Increased sympathetic tone
C) Fever
D) Hypothermia

Question 16

Identify the following rhythm (lead II): ____________________

Question 17

Identify the following rhythm: ____________________

Question 18

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

A) More P waves than QRS complexes
B) P waves that look alike and upright in lead II, one before each QRS complex
C) Irregular atrial and ventricular rhythm
D) PR interval exceeding 0.20 second

Question 19

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

A) arrhythmia
B) bradycardia
C) rhythm
D) tachycardia

Question 20

Which of the following are possible causes of sinus bradycardia?

A) Elevated temperature, pain
B) Increased intracranial pressure, beta-blocker overdose
C) Hypoxia, fright, caffeine-containing beverages
D) Hypovolemia, administration of sympathomimetics

Question 21

Identify the following rhythm (lead I): ____________________

Question 22

Identify the following rhythm (lead II): ____________________

Question 23

Identify the following rhythm (lead II): ____________________

Question 24

Identify the following rhythm (lead II): ____________________

Question 25

Identify the following rhythm (lead II): ____________________

Question 26

Identify the following rhythm (lead II): ____________________

Question 27

Identify the following rhythm (lead II): ____________________

Question 28

Identify the following rhythm (lead II): ____________________

Question 29

Identify the following rhythm (lead II): ____________________

Question 30

Identify the following rhythm (lead II): ____________________

Question 31

Identify the following rhythm (lead II): ____________________

Question 32

Identify the following rhythm: ____________________

Question 33

Identify the following rhythm (lead II): ____________________

Question 34

Identify the following rhythm (lead II): ____________________

Question 35

Identify the following rhythm (lead II): ____________________

Question 36

Identify the following rhythm (lead II): ____________________

Question 37

Identify the following rhythm (lead II): ____________________

Question 38

Complete the following ECG criteria for a sinus rhythm:

Question 39

Complete the following ECG criteria for a sinus bradycardia:

Question 40

Identify the following rhythm (lead II): ____________________

Question 41

Complete the following ECG criteria for a sinus arrhythmia:

Question 42

Complete the following ECG criteria for a sinus arrest:

Question 43

Complete the following ECG criteria for a sinus tachycardia:

Question 44

Complete the following ECG criteria for a sinoatrial (SA) block:

Question 45

List three significant signs and/or symptoms that, if observed with a sinus bradycardia, would require management of this dysrhythmia.