Hello,
Thanks for the query to H.C.M. Forum.
Inability of the heart to pump the blood effectively enough to meet the body's metabolic activities .
In your query you asked ,how it occurs ( what is the reason?).
May result from intrinsic causes of pump failure,
Increased workload over heart,
Coronary
artery disease,
hypertension,
Hypertrophy of heart,
cor pulmonale.
Diabetes is one of the most foremost cause of congestive
heart failure.
4 CLASS of heart failure present.
Class 1 patient can play football,
class 2 ( certain limits)
3 & 4 not allowed to play football.
Hope I have answered your question.
If further any question I will help.
GET WELL SOON.
Dr. HET