The definition of heart failure, it occurs when the heart loses its ability to pump enough blood through the body.  Usually, the loss in pumping action is a symptom of an underlying heart problem, such as hypertension and CAD = coronary artery disease.  The term heart failure suggests a sudden and complete stop of heart activity but actually the heart does not suddenly or abruptly stop.  Instead the way it works is heart failure usually develops over time, years. The heart first compensates with the disease or illness the individual has but, just like a car, after wear and tear the heart goes into decompensating to heart failure due to the heart decline.  How serious is this condition?  It varies from person to person depending on factors like an individual with obesity & unhealthy versus a person in healthier condition.  All people diagnosed or not diagnosed with heart failure lose a pumping capacity of the heart happens as they age but diagnosed with heart failure makes the engine of the body a challenge in doing its function properly.  The pump loss is more significant in the person with heart failure and often results from a heart attack (actual scaring to the tissue=death to that tissue area) or from other diseases that can damage the heart.  The severity of the condition determines the impact it has on a person’s life.   At the other end, extremes, treatment often helps people lead full lives if the person follows the meds ordered by the doctor including the diet and activity/exercise the doctor orders to the patient with heart failure (compliance so important).  There are different levels of heart failure but even the mildest form is a serious health problem, which must be treated.  If not the pump (the heart) will just get worse in doing its function properly.  To improve the chance of living longer in an individual with heart failure, patients must take care of themselves, see their physician (cardiologist) on a regular basis, and closely follow treatments (as ordered) with knowing what heart failure actually to understanding how the disease works (is the failure on the right side or left side? Which in time will effect the other side in time).  In knowing what side the failure is on will make you understand what signs and symptoms to expect.