What are the causes of heart failure?

Depends: Congestive heart failure or CHF can be from many things. Different types include systolic dysfxn wich means a weak heart. Usually from a virus, heart attack, or post partum.Diastolic dysfxn where the heart is stiff is usually due to hyer tension. High out put heart failure is when things such as hyperthyroidism or anemia . So your question is very broad and you need to narrow it down

Many: Weak heart muscles /hypertrophed heart / valve lek of moderate to severe degree valve narrowing -aoric stenosis /mitral stenosis hypertension to name a few.

Multiple: Coronary artery disease (Angina) Diseases of the heart muscle (cardiomyopathy). High blood pressure (hypertension). Diseases of the heart valves. abnormal heart rhythms (arrhythmias). Medicines, alcohol excess, cocaine and some types of chemotherapy. Severe anaemia, thyroid disease (hypothyroidism or hyperthyroidism) and Paget's disease of bone.

Multiple: Most common: coronary artery disease. Others: viral illness, drugs/ toxins, infiltrative disorders, hyper and hypothyroid, tachycardia, , and many more.

Many causes: The primary job of the heart and cardiovascular system is to deliver oxygen to the body. A failure to adequately deliver oxygen to the body is one of the best definitions of heart failure. There are many causes of heart failure. Structural heart disease, congenital heart disease, damaged heart muscle due to a myriad of causes are all examples of problems that can cause heart failure.

Weakness of heart.: CHF is primarily caused by an issue in the heart that prevents it from being able to supply your body with the oxygen it needs. This can be caused by weakness of the heart muscle, insufficiency of a valve in the heart or a rhythm disturbance that disrupts the forward flow of blood from the heart.

Heart failure: In a healthy heart, during each heartbeat a set amount of blood enters the heart and is pumped out again. In heart failure, your heart cannot cope with pumping the full amount of blood in each heartbeat. Systolic heart failure- the ventricles of the heart do not contract properly during each heartbeat so blood is not adequately pumped out of the heart.Diastolic heart failure. This occurs when the ventricle does not fill up with blood enough