3.3 -- Cardiac Functions as Wiggers and PV Loops

Question 1

What phase is when the ventricles begin contraction with pressure rising in the ventricles? This has the AV valves close as well, with the “lub” sound happening.

Answer 1

Isovolumetric contraction

Question 2

What phase is when pressure builds, where blood is ejected out of ventricles and into arteries? This is when the semilunar valves open.

Answer 2

Ventricular ejection

Question 3

What phase is when pressure in ventricles fall? This has the semilunar valves close, with the “dub” sound happening.

Answer 3

Isovolumetric relaxation

Question 4

What phase is when pressure in the ventricle falls below that of the atria? This is when the AV valves open.

Answer 4

Ventricular filling

Question 5

What phase is when atria contract, sending the last of the blood to ventricles?

Answer 5

Late filling

Question 6

All the blood flow events the heart accomplishes occurs in how many heartbeats?

Answer 6

One heartbeat

Question 7

What is stroke volume?

Answer 7

The amount of blood ejected per beat

Question 8

What is the end-diastolic volume (EDV)?

Answer 8

The total volume of blood in the ventricles at the ending of filling (diastole)

Question 9

What is the end-systolic volume (ESV)?

Answer 9

The total amount of blood left in the left ventricle after ejection (systole)