Week 5 Ventricular Loading

Question 1

What is the frank starling law

Answer 1

The greater the volume of blood in the heart during diastole, the more forceful the contraction

Question 2

What is stroke volume

Answer 2

• The volume of blood pumped out of the ventricles during systole
• NL value is 70-100 Ml/beat

Question 3

What is the equation for stroke volume

Answer 3

Edv-esv

Question 4

What are the 4 determinants of cardiac output

Answer 4

1) afterload
2) preload
3) contractility
4) heart rate

Question 5

What is the formula for cardiac output

Answer 5

Cardiac output = SV x HR

Question 6

What is ventricular preload

Answer 6

• The maximum the ventricle can expand at end diastole
• SV increases if preload increases

Question 7

What is arterial afterload

Answer 7

The load the heart must eject against during systole

Question 8

What is contractility

Answer 8

Force expended on the heart muscle causing a contraction
Greater contractility greater sv

Question 9

What is cardiac output and normal range

Answer 9

• Amount of blood ejected from the heart/min
• 4-8 L/min