Sinus Rhythms

Question 1

What does the P wave represent?

Answer 1

Atrial depolarization

Question 2

What does the QRS complex represent?

Answer 2

Ventricular depolarization

Question 3

What does the T wave represent?

Answer 3

Ventricular repolarization

Question 4

Characteristics of normal sinus rhythm

Answer 4

Atrial rate: 60-100/minute
PR interval: 0.12 or greater

Question 5

Characteristics of sinus Bradycardia

Answer 5

Atrial rate < 60/minute
PR interval: 0.12 or greater

Question 6

Characteristics of sinus tachycardia

Answer 6

Atrial rate: 101-150/minute
PR interval: 0.12 or greater

Question 7

Characteristics of sinus arrhythmia (SA)

Answer 7

P-P irregular, in a pattern
Difference between shortest P-P and longest P-P is <3 little blocks
PRI is at least 0.12 seconds

Question 8

Treatment for sinus bradycardia

Answer 8

Atropine
Dopamine
Epi
Pacemaker

Question 9

Treatment for sinus tachycardia

Answer 9

Fix according to cause
Ex: pain, stress, anxiety, stimulant, low BP, fever

Question 10

Treatment for sinus arrhythmia

Answer 10

No treatment