Severe dehydration will decrease preload because there won't be as much volume coming into the heart.
It lowers the energy of a certain person causing him/her to move slowly.
Preload is caused by decreased blood volume in ventricles. Therefore, decreased preload directly caused by bleeding, polyuria, dehydration.
Afterload
dehydration increases hematocrit
It decreases the affect of aldosterone secretion.
John is about to preload his truck with logs.
Preload does not directly influence cardiac contractility, as they are distinct concepts. Preload refers to the degree of stretch of the cardiac muscle fibers at the end of diastole, which affects the volume of blood in the ventricles. While increased preload can enhance the force of contraction through the Frank-Starling mechanism, contractility itself is primarily influenced by factors such as sympathetic nervous system stimulation and circulating hormones. Thus, while preload can affect the overall cardiac output, it does so indirectly through its interaction with contractility.
dehydration
Dehydration will eventually affect the brain, so sure.
it decreases blood volume and preload
ACE inhibitors primarily affect afterload by causing vasodilation, which reduces systemic vascular resistance. This action can lower blood pressure and decrease the workload on the heart. While they may have some indirect effects on preload by reducing fluid retention, their main impact is on afterload reduction.
if you find out tell me what preload is