definitions Flashcards
1
Q
preload
A
pressure/stretch exerted on the walls of the ventricle by the volume of blood filling the ventricles @ the end of diastole
used as an indication of volume status
2
Q
afterload
A
pressure required to open aortic valve.
resistance to ventricular contraction; pressure the ventricles have to overcome to eject blood into the circulation
3
Q
contractility
A
ability of a muscle to shorten when stimulated esp the force of myocardial contraction
4
Q
SV
A
volume of blood pumped with each heartbeat
normal SV-50-100/beat
5
Q
CO
A
amt of blood pumped by the heart each min
normal CO- 4-8L/min
co=sv x hr
