Cardio Physio--Ballam Flashcards Preview

Cardiovascular II > Cardio Physio--Ballam > Flashcards

Flashcards in Cardio Physio--Ballam Deck (18)
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1

first heart sound

closure of AV valves

2

2nd heart sound

closing of aortic and pulm valves

3

3rd heart sound

blood rushing into the ventricle

4

4th heart sound

atrial contraction- last bit of blood being squeezed into the ventricle

5

p wave represents what phase?

phase 0 (of atrium)

6

QRS represents what phase?

phase 0 (of ventricles)

7

ST segment- what phase?

phase 2

8

T wave- what phase?

phase 3 (repolarization)

9

when is Na most permeable?

phase 0 (p wave and QRS)

10

ST elevation- due to?

phase 4 (resting phase of AP)- part of heart is depolarized (ischemic region)
-ischemic tissue not able to repolarize/reach normal resting membrane potential

11

fast AP- phase 0

(rapid depolarization)
Na goes into cell

12

fast AP- phase 1

(early repolarization)
-Na channel closes
-k channel opens

13

fast AP- phase 2

(plateau)
-Ca channel opens
-K channel open

14

fast AP- phase 3

(rapid repolarization)
-Ca channel closes
-K channel open

15

fast AP- phase 4

-resting membrane potential

16

sinus or AV nodal cells- slow AP- phase 4

-Na open

17

sinus or AV nodal cells- slow AP- phase )

-Na open
-Ca opens

18

sinus or AV nodal cells- slow AP- phase 3

-K opens