Question #160
Which of the following equations are true, assuming common abbreviations?
Flow around the cardiovascular system, considered as a closed loop, may be modelled with a simple application of Darcy's law: CO = (ABP - RAP) / TPR. This treatment neglects the importance of peripheral factors, i.e. the muscle and respiratory pumps, in facilating venous return, however.
Stroke work is given by the product of SV and mean ABP (the product of volume and pressure has units of energy), while cardiac work is is product of stroke work and HR.
The output of either ventricle is given by HR x SV.
See A Thinking Approach to Physiology
, pages 114 - 117.