- a: Closure of mitral valve (S1)
- b: Opening of aortic valve
- c: Closure of aortic valve (S2)
- d: Opening of mitral valve.
Events taking place:
- During diastole, the ventricle fills and pressure increases from d to a
- Pressure then rises sharply from a to b during isovolumetric contraction
- Pressure falls slightly during ventricular ejection from b to c
- At c, the aortic valves close and pressure falls during isovolumetric relaxation from c to d.