Chapter 7

Question 1

All matching upright P waves in Lead II are

Answer 1

Sinus P waves until proven otherwise

Question 2

QRS interval measurement time

Answer 2

0.12 secs

Question 3

Sinus Bradycardia

Answer 3

heart rate - 60
regularity - regular
causes - vagal stimulation, hypoxia, MI
effects - decreased cardiac output
treatment - atropine

Question 4

Sinus Tachycardia

Answer 4

heart rate - 101-160
regularity - regular
causes - MI, pulmonary embolus, fever, CHF, hypoxia
effects - decreased cardiac output
treatment - beta blockers

Question 5

Sinus arrest

Answer 5

heart rate - can occur at any heart rate
regularity - regular but interrupted by a pause
causes - sinus node ischemia, hypoxia
effects - decreased cardiac output
treatment - atropine

Question 6

sinus exit block

Answer 6

heart rate - can occur at any moment
regularity - regular but interrupted by a pause
causes - sinus node ischemia, hypoxia
effects - decreased cardiac output
treatment -atropine