2. Heart failure
Under normal circumstances, the heart pumps blood to the body with sufficient force and volume in order to supply the various organs in the body with oxygen and nutrients. Any condition that decreases the ability of the heart to pump blood efficiently can cause heart failure. From the aforementioned myocardial infarction to fluid overload, and even myocarditis. Many diseases can disturb the intricate balance of mechanisms that allows the heart to function properly.
In these cases, the heart cannot pump the blood volume it receives fast enough. The result is an accumulation of blood in the heart, with consequent pulmonary congestion and edema.