Cardiac Cycle Flashcards Preview

S&F III: Exam 1 > Cardiac Cycle > Flashcards

Flashcards in Cardiac Cycle Deck (21):
1

at rest, what does heart spend more time in?

diastole

2

Murmur causes

stenosis, regurg, ejection thru dilated chamber, blood flow increase, VSD

3

Phase 1 (atrial systole)

a wave
coincides with Ventricular diastole (EDV)

4

a wave

transient rise of LA pressure

5

Phase 2 (isovolumetric contraction)

QRS complex!!

AV valves close (V>A pressure)

6

Phase 3 (rapid ejection)

V>A pressure
semilunar OPEN
(70% SV)

7

Phase 4 (reduced ejection)

T-wave!!

V pressure dec, blood flow dec (30%)
semilunar close (DIASTOLE STARTS)

8

Phase 5 (isovolumetric relaxation)

ESV, all valves closed
aortic pressure declines with elastic recoil

9

Phase 6 (rapid filling)

AV OPEN and PASSIVE filling begins

10

Heart Sound 1

beg of phase 2, closure of AV valves

11

Heart Sound 2

beg of phase 5; closure of semilunar valves (a>pt)

12

3rd HS

mid of Stg 6; path in adults

13

4th HS

mid of Phase 1; old people

14

Semilunar murmurs

stenosis--> systolic
insuffiency-->diastolic

15

AV murmurs

stenosis--> diastolic
insufficiency--> systolic

16

Jugular Venous Pulse Wave

used to eval pressure in RA bc no valves

17

A wave of JVPW

(phase 1) venous distention due to atrial systole

18

C wave

(phase 3) close of tricuspid bulges into atrium during isoV contraction

19

X descent

(phase 2-4) decreased p due to RA relax

20

V wave

(phase 6) filling of RA with venous blood

21

Y descent

(mid6-7) rapid flow of blood into RV @ end of isoV relax