Cardiac Cycle & Valvular Heart Disease Flashcards Preview

PHYSIOLOGY > Cardiac Cycle & Valvular Heart Disease > Flashcards

Flashcards in Cardiac Cycle & Valvular Heart Disease Deck (52)
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1

cardia cycle diagram

- pressure and volume

2

pressure on the upper part

- ventricular pressure
- aortic pressure
- left atrial pressure

3

volume on the lower part

- end diastolic volume when the heart is filled
- end systolic volume after the heart has ejected blood
- stroke volume
- difference bet EDV - ESV = SV

4

P wave

- atrial depolarization
- signal to the atrium to contract to push blood into the ventricles
- during ventricular filling
- during diastole

5

ventricular pressure

- systole

6

contracting ATRIA

- VENTRICLE is being filled

7

contacting VENTRICLE

- ATRIA IS being filled

8

QRS

- closure of the mitral valve (R wave) S1
- depolarization of the ventricles
- initiate systolic constriction ventricles

9

QRS valvular events

- closure of the mitral valve

10

R wave

- S1
- first heart sound

11

ventricular depolarization

- pressure in the ventricle is increasing
- isovolumetric contraction
- ventricular pressure >80 mmHg
- it pushes open the aortic valve, EDV
- open of the aortic valve
- blood is ejected to the aorta
- aortic pressure is rising simultaneously with the ventricular pressure

12

ventricular pressure falls

- causing fall in aortic pressure
- beginning of T wave
- ventricular repolarization to relax

13

T wave

- ventricular repolarization (RELAX)
- AORTIC PRESSURE >VENTRICULAR PRESSURE
- S2 second heart sound
- closure of the aortic valve

14

S2

- second heart sound
- closure of the aortic valve
- closure of the pulmonary valve causing split weaker pressure

15

T wave valvular event

- aortic closure
- S2

16

P wave in a EKG

- atrial depolarization
- mitral valve is opening
- filling of the heart
- no sound
- S3, S4

17

atrial depolarization

- S3, S4

18

QRS

- ventricular depolarization
- mitral close
- S1

19

PR interval

- AV node conduction

20

T wave

- ventricular repolarization
- closure of the aortic valve
- S2

21

QT or ST interval

- ejection phase
- aortic valve open

22

S1

- closure of the mitral valve and tricuspid valve

23

S2

- closure of aortic and pulmonary valve

24

widening split of S2

- pulmonary stenosis delay closure of the pulmonary valve
- right bundle branch block

25

fixed splitting of S2

- atrial septal defect (ASD)
- L=>R shunt

26

paradoxical splitting

- left bundle branch block
- advance aortic stenosis delay closure of aortic valve

27

apical beat

- 5th ICS MCL
- mitral valve

28

aortic valve

- second intercostal space R of the sternum

29

pulmonary valve

- second intercostal space L of the sternum

30

tricuspid valve

- 3rd, 4th , 5th intercostal space to the left of the sternum