EKG's & Lab Values

Question 1

What is the cardiac conduction path?

Answer 1

SA node -> AV node -> Bundle of His -> Bundle Branches -> Purkinje Fibers

Question 2

Atrial depolarization is in what wave P,QRS,T?

Answer 2

P wave

Question 3

Ventricular depolarization is in what wave P,QRS,T?

Answer 3

QRS wave

Question 4

Ventricular repolarization is in what wave P,QRS,T?

Answer 4

T wave

Question 5

When looking for ventricular rhythm, what intervals are you looking at? why?

Answer 5

R-R intervals = ventricular depolarization

Question 6

When looking for atrial rhythm, what intervals are you looking at? why?

Answer 6

P-P intervals = atrial depolarization

Question 7

When looking at rhythm, what are you looking for?

Answer 7

to see if the rhythm is regular or regularly irregular

Question 8

How do you determine the rate?

Answer 8

1 - find QRS complex closer to a line
2 - countdown each hatch from 300,150,100,75,60,50

Question 9

What is sinus bradycardia?

Answer 9

slow - < 60 bpm

Question 10

What is sinus tachycardia?

Answer 10

fast - > 100 bpm

Question 11

What is rapid firing with incapability of depolarizing atria?

Answer 11

atrial fibrillation

Question 12

What are the key things you would see with atrial fibrillation?

Answer 12

no definite P wave, irregular rhythm, normal QRS complex

Question 13

You notice no P wave, and early QRS complexes with compensatory pauses. What is going on?

Answer 13

Premature ventricular contraction

Question 14

If you see >3 PVC’s in a row, what’s going on? What’s the HR?

Answer 14

Ventricular tachycardia

Question 15

WBC reference value? What will happen when high?

Answer 15

5.0 - 10.0 x 10^9/L
high: weakness, fatigue, fever, dizziness, etc.

Question 16

Platelet reference value? What will happen when low and high?

Answer 16

150-400 x k/ul
low: (excessive bleeding) bruising, petechiae, fatigue, jaundice
high: (thrombocytosis) weakness, headache, dizziness, chest pain