Heart Failure

Numerous factors lead to congestive heart failure and other types of heart failure

Myocardial infarction; which is an injury to the cardiac muscle. When the oxygen and nutrient supply to the heart itself is not adequate as in coronary artery disease1, the heart muscle tissue can’t generate enough energy to work as an efficient pump leading to lethargic heart muscle activity.
Heart valve disease; in this condition, the heart valves are either hardened, prolapsed, regurgitating, etc. causing more input then the output gradually leading to failure.
Congenital heart diseases like Atrial septal defects, ventricular septal defects, causing mixing of the blood leading to decreased efficiency of the heart as a pump.
Cardiac muscle disease/inflammation (myocarditis) this condition is caused by any kind of injury to the heart muscle causing inflamed tissue leading to inefficient pumping.
High blood pressure (hypertension): hypertension is known as a silent killer. This condition damages the vessels leading to thickening of the vessels so the heart can’t pump the blood in the forward direction due to increased resistance, this causes pressure and stress on the heart muscle plus overload on the heart gradually leading to failure.
Alcohol and other drugs: these chemicals cause direct and indirect injury to the heart muscle leading to heart failure.
Lung diseases: Conditions like this lead to less oxygen of blood, due to which the oxygen supply to the heart itself and other organs causes direct damage to the tissue.