how anemia precipitates heart failure?

[soma]

how anemia precipitates heart failure?

[tv_l]

The definition of heart failure is the inability of the heart to meet the demands placed upon it. From this, there are two categories of cause, EITHER high output heart failure where although the heart is otherwise normal, the demands on it are so great that it can't keep up OR low output, where a badly damaged heart cannot keep up with the modest demands of daily life. Anaemia increases the demand on the heart because it decreases the oxygen carrying capacity of the blood, therefore you need more blood flowing round to meet the body's demands. As a result, the heart needs to pump harder and faster. If it can't do that this results in heart failure.Heart failure does not mean the heart stops, merely that it can't keep up.

[AbeLincolnParty]

I am drawing on what little physiology I know:Heart failure is the failure of the heart to pump enough blood such that the tissues of the body (including itself) have enough oxygen and other nutrients.With anemia (either from low quality of the blood or low quanity of blood or both) the heart is not getting what it needs to work as a pump.If the volume is low, the Frank Starling law operates such that the less full the heart is because of inadequate venous return to the heart, the less the heart can forcefully pump. If the quality of the blood is low (low oxygen) it needs to pump more blood to meet demands, but that is hard to do or to keep up with as the heart is getting less oxygen to do the job yet is asked to work harder.(We want you to give us just as many bricks but from now on you have to gather your own straw)