Pressure ventricular-Volume Loop Flashcards Preview

PHYSIOLOGY > Pressure ventricular-Volume Loop > Flashcards

Flashcards in Pressure ventricular-Volume Loop Deck (11):
1

ESV

- mitral valve opens
- aortic valve closes
- isovolumetric relaxation
- is the lowest volume

2

EDV

- filling
- mitral valve closes
- isovolumetric contraction (the volume remains the same as the ventricle increase pressure)
- ventricular pressure >aortic pressure
- ejection phase

3

period of the hear is doing its maximum work

- is during ejection phase
- work = force x distance

4

isovolumetric contraction

- most of energy consumption

5

aortic insufficiency, early uncomplicated

- increase preload
- increase STROKE VOLUME main event
- increased ventricular systolic pressure
- increase EDV
- increase pressure

6

heart failure (decrease contractility-systolic failure)
contractility is inverse to ESV

- decrease ventricular systolic pressure
- increased preload
- loops shifts to the right
- increase ESV

7

essential hypertension (aortic stenosis)

- increased ventricular systolic pressure
- preload remains almost the same
- increase afterload due to obstructive valve
- shift to the R
- minimal decrease SV

8

early hypertension

- increase in afterload
- increase pressure
- volume is NORMAL
- SV is normal

9

increase contractility is inverse to ESV (decrease ESV) DIGOXIN

- increase ventricular systolic pressure
- decrease preload
- increase ejection fraction
- loop shift to the LEFT
- increase SV

10

EXERCISE

- increase ventricular systolic pressure
- increase ejection fraction
- no change in preload (increase HEAVY exercise)
- ESV decrease SHIFTS TO THE LEFT ONLY ESV

11

DIGOXIN

- entire curved shifts to the LEFT