Cardiac Cycle

length of systole at 72 bpm

.3 s

length of diastole at 72 bpm

.5 s

phase I

passive ventricular filling

phase II

atrial contraction

EKG correlate for phase II

p wave

what % does atrial contraction contribute to EDV at resting HR

25

what % does atrial contraction contribute to EDV at high HR

40-50

phase III

isovolumetric ventricular contraction

EKG correlate for phase III

QRS

phase IV

ventricular ejection

phase V

isovolumetric ventricular relaxation

EKG correlate for phase V

t wave

when is EDV measured

end of phase II

when is ESV measured

end of phase IV

normal RA pressure

0-5

normal RV pressure

25/5

normal PA pressure

25/10

normal LA pressure

8-10

normal LV pressure

120/10

normal Ao pressure

120/80

when are the atria NOT filling

P wave/phase II