A Healty heart expands the life, by far.

The heart is like the engine to a car but for us it’s the “pump” for the human body; without the engine the car won’t run and without the pump we won’t live.  The normal size of the heart is about the size of your fist, maybe a little bigger.  It pumps blood continuously through your entire circulatory system.  The heart consists of four chambers, 2 on the right and 2 on the left.  The right side only pumps high carbon dioxide levels of blood, after all the oxygen was used by the tissues and returns to the heart in the right upper chamber and leaves to the lung from the right lower chamber.  From the lungs it than goes to the left side of the heart now, which is a very short distance as opposed to where the left side pumps the blood.  The L side of the heart pumps blood to the feet, brain and all tissues in between with high oxygen levels of blood.   This is why the L side of the heart does more work than the R side since the blood leaving the L side has a longer distance in distributing oxygen.  The heart pumps the blood with high oxygen blood levels to reach all your tissues and cells, going to the feet, brain, and to all other tissues in between returning home again to the right side of the heart (upper chamber) to get sent to the lungs again for more oxygen.  This is why the muscle on the L side of the heart is larger than the right, it works harder.  Every time your heart beats (the sound we call lub dub) the organ is sending out a cardiac output of blood either to the lungs for more oxygen or to the body tissues through the aorta to give oxygenated blood to your tissues and cells.  This is the mechanics of how the heart works in our body.                                                                                                                            Let’s see what can occur if the heart doesn’t function properly.  If your heart is not pumping out a sufficient amount in your cardiac output to either the lungs (from rt. Side) or to the tissues (from the lt. side) than it tries to work harder where it does ok at first but over time weakens.  As this weak heart struggles to pump blood the muscle fibers of the heart stretch.  Over time, this stretching leaves the heart with larger, weaker chambers.  The heart enlarges (cardiomegaly).   If this continues to go on this could go into R or L sided heart failure.  When this happens, blood that should be pumped out of the heart backs up in the lungs (L sided failure) or in the tissues (R sided failure).  The side the failure is on doesn’t allow proper filling of the chambers on that side and back up happens; so if on the L the fluids back up in the lungs or the R the fluids first back up in the veins which can expand to hold extra blood but at some point dump the extra fluids in your tissues (This is edema in feet first due to gravity).   This is all due to overloading of the blood not filling up in the chambers of the heart to make a good cardiac output of blood and in time the fluid backs up (bad pumping=backup of blood=fluid overload in the lungs (pulmonary congestion) to fluid staying in the skin (first the lower extremities due to gravity=feet which we call edema working its way up the legs.).  This condition in time with no treatment will go into congestive heart failure (CHF) to the other side of the heart if not controlled.  CHF can range from mild to severe.   There is 670,000 cases are diagnosed with this every year and is the leading cause of hospitalization in people over 65 y/o.  Causes of CHF are: heart attack, CAD (coronary artery disease), cardiomyopathy, conditions that overwork the heart like high blood pressure, diabetes and obesity (These diseases can be completely preventable or at least well controlled).