How would you define a condition of "stable heart...

[beeradd23]

...failure"? Doesnt 'stable' connotate a feeling of security? How does it differ from Chronic Heart Failure?

[Mrs. Goddess]

Possibly someone with Congestive Heart Failure in stable condition. Congestive Heart Failure is a condition that doesn't go away, but the person can be in stable condition.

[Knick A]

Heart failure covers a lot of ground. Mild heart failure may just cause some ankle swelling or shortness of breath - severe heart failure would suggest someone who is confined to bed, requiring oxygen etc. Stable just means it isn't getting better or worse.