With time, the heart failure becomes worse and worse. High blood volumes and remodeling increase heart size over time, which further impacts its ability to adequately eject blood. In this way, a system designed to support our heart has caused it to fail when attempting to compensate for heart injury. Consider that the design of this system has evolved in such a way as to protect our body not from heart damage, but from exterior threats. If blood is lost, then blood pressure in our arteries will drop accordingly.
Fluid retention serves to keep high blood volumes to buffer the loss due to injury.
By constricting our arteries as shown before , the remaining blood gets mobilized more efficiently to tissues at an adequate pressure. Therefore, possibly the situation shown in the chart isn't so much an error in design of the neuroendocrine system so much as a misapplication of a control mechanism initiated by intial heart and circulatory impairment. This completes the introduction to heart failure throughout the body .