7: Cardiac cycle

Question 1

Isovolumetric contraction

Answer 1

Ventricle is contracting, but pressure hasn’t built enough to open semilunar valve

Question 2

AV valves are open during

Answer 2

Diastole

Question 3

7 Phases of cardiac cycle

Answer 3

Diastole > Atrial Systole> isovolumic contraction > Ejection (counts as 2 phases) > Isovolumic relaxation > Rapid inflow

Question 4

What is happening when all valves are closed

Answer 4

Isovolumeric contraction

Question 5

What is the S1 sound

Answer 5

closure of AV valves

Question 6

S2 sound

Answer 6

Closure of semilunar valves

Question 7

What S sounds are heard

Answer 7

S1 and S2