Week 5: Rhythm interpretation

Question 1

What electrolyte enters the cell during depolarization?

Answer 1

sodium

Question 2

What electrolyte is primarily responsible for contraction?

Answer 2

calcium

Question 3

what is normally responsible for automaticity in the heart?

Answer 3

SA node

Question 4

Is it possible to have contraction without depolarization?

Answer 4

no, must have electrical activity in order to depolarize

Question 5

What is pulseless electrical activity

Answer 5

electrical activity without a pulse, could be due to tamponade, no blood in body etc.

Question 6

Each small square on a rhythm strip represents how long

Answer 6

0.04

Question 7

What does the P wave represent

Answer 7

atrial depolarization

Question 8

what does the PR interval represent

Answer 8

atrial depolarization/delay (kick)

Question 9

What does the QRS represent

Answer 9

ventricular depolarization

Question 10

What does the ST segment represent

Answer 10

early ventricular depolarization

Question 11

What does the T wave represent

Answer 11

later ventricular repolarization