4. Definition
Cardiac output: is the amount of blood that the heart
can pump out in one minute.
Stroke volume: The volume of blood ejected with
each beat.
Preload: is the volume of blood lead to ventricular stretch at the
end of diastole.
Afterload: is the amount of resistance the heart must overcome
to open the aortic valve and push the blood volume out into the
systemic circulation
5.
6. Hypovolemic shock
is a condition characteristic by loss of intravascular
volume
+ reduced tissue perfusion
๏ resulte from decreased blood volume
๏ caused by blood loss
๏ leads to reduced cardiac output and organ perfusion.
7. Decrease Intravascular Volume
Decrease Systemic arterial blood
pressure
Decrease Venous return
Decrease Preload (ventricular filling )
Decrease Stroke Volume (the volume
of blood ejected with each beat).
DECREASE CARDIAC OUTPUT
14. References
โข Guyton & Hall. Text book of Medical physiology
โข http://www.emedicinehealth.com/script/main
/mobileart-
emh.asp?articlekey=59301&page=3
โข http://www.ems1.com/ems-
products/education/articles/479223-Blood-
Pressure-Assessment-in-the-Hypovolemic-
Shock-Patient/
Editor's Notes
DECREASE CARDIAC OUTPUT ๏ lead to hypotention + decrease in tissue perfucion
It is calculated as theย stroke volumeย (how much blood each heart beat can push out) multiplied by the heart rate (how fast the heart beats each minute).
If there is any change stroke of HR this will influnce the CO