The Cardiac Cycle

Question 1

Diastole

Answer 1

Relaxation of heart, mostly refers to ventricular

Question 2

Systole

Answer 2

Contraction, mostly in relation to ventricles

Question 3

Late distole

Answer 3

Both sets of chambers are relaxed and fill passively

Question 4

What does atrial systole achieve

Answer 4

Forces a small amount of additional blood into ventricles

Question 5

Isovolumetric ventricular contraction

Answer 5

The first phase of ventricular contraction pushes the AV valves closed but doesn’t create enough pressure to open the semilunar valves

Question 6

Ventricular ejection process

Answer 6

As ventricular pressure rises and exceeds pressure in the arteries, the semilunar valves (aortic and pulmonary) open and blood is ejected

Question 7

Isovolumetric ventricular relaxation

Answer 7

As the ventricles relax the pressure in them falls and blood flows back into cusps of semilunar valves and snaps them closed

Question 8

The phonocardiogram

Answer 8

Usually Lub dub

Hearing mitral and tricuspid valves closing then aortic and pulmonary valves closing

Question 9

Sound in between Lub and dub

Answer 9

Stenosis (narrowing) of aortic/pulmonary valves
Or
Regurgitation through mitral/tricuspid

Question 10

Sound between dub and lub

Answer 10

Stenosis of mitral/tricuspid
Or
Regurgitation through aortic/pulmonary

Question 11

Noise the whole time

Answer 11

Septal defect