CARDIAC OUTPUT
Cardiac output is the volume of blood pumped by the left
ventricle in one minute
In health Left ventricular output Right ventricular
output
CO HR x SV
Stroke Vor The amount of blood pumped by the left
ventricle in one contraction
Ejection fraction The fraction of C DV that is ejected
with each beat calculated via SV EDU
End diastolic volume Amount of blood within the
ventricles C
usually L before contraction
Example Olympic athlete ejection fraction 83
1 So I 180 vs Heart failure 25 t 50 200 due to
the heart becoming dilated with an A venous return T
End diastolic volume but to stroke volume Blood
escaping to venous return oedema
Sympathetic Fight or flight effects on HR Speeds
up the heart via a t chronotropic effect THR
B 1 receptor opens CaZt L channels
Increases slope of pre potential making it reach firing
level quicker more rapid SA firing
Cardiac output is the volume of blood pumped by the left
ventricle in one minute
In health Left ventricular output Right ventricular
output
CO HR x SV
Stroke Vor The amount of blood pumped by the left
ventricle in one contraction
Ejection fraction The fraction of C DV that is ejected
with each beat calculated via SV EDU
End diastolic volume Amount of blood within the
ventricles C
usually L before contraction
Example Olympic athlete ejection fraction 83
1 So I 180 vs Heart failure 25 t 50 200 due to
the heart becoming dilated with an A venous return T
End diastolic volume but to stroke volume Blood
escaping to venous return oedema
Sympathetic Fight or flight effects on HR Speeds
up the heart via a t chronotropic effect THR
B 1 receptor opens CaZt L channels
Increases slope of pre potential making it reach firing
level quicker more rapid SA firing
