How does edema develop from a person suffering from congestive heart failure?

Question

It is under the Circulatory System..

Answer 1

Just like congestion on the freeway, it piles up.

Answer 2

Here acute damage to the heart results in decreased cardiac output and activation of compensatory mechanisms. Acute haemodynamic abnormalities as elevation of the left ventricular end - diastolic pressure and decreased cardiac output manifest as dyspnoea, edema and fatigue .There is alteration in heart structure. When there is activation of neuro -endocrine system there is constrictions of blood vessels which causes extra work imposed on the heart add the blood vessels of the kidneys also constricted there is fluid retention causing edema. Also there is redistribution of blood flow away from skin muscles and splanchnic circulation . Reduced blood flow to the kidneys causes Sodium retention which leads to fluid retention causing edema.