Cardiac Cycle Quiz Flashcards
diastole
relaxation
systole
contraction
end diastolic volume EDV
volume of blood in the ventricle at the end of the filling phase
end systolic volume ESV
volume of blood in the ventricle at the end of ventricular contraction
isovolumic contraction
period during ventricular contraction when there is no change in the volume of blood in the ventricle since the valves are closed
isovolumic relaxation
period during ventricular relaxation when there is no change in the volume of the blood in the ventricle since the valves are closed
stroke volume
EDV-ESV
volume of blood pumped by one ventricle in one contraction
~ 60-70mL
Ejection Fraction
% of EDV that is pumped out or ejected (stoke volume/EDV)
~55-60%
cardiac output
HR x SV
the volume of blood being pumped by the heart in a minute
1st heart sound
atrial valves closing
2nd heart sound
semilunar valves closing
Cardia cycle (5)
late diastole atrial systole isovolumic ventricular contraction ventricular ejection isovolumic ventricular relaxation
papillary muscles
keep the valve prolapsing from the ventricular pressure
atrioventricular valves
mitral/bicuspid (LA)
tricuspid (RA)
papillary muscles
semilunar valves
aortic
pulmonary
no papillary muscles
