There are many different forms of heart disease. The most common cause of heart disease is narrowing or blockage of the coronary arteries, the blood vessels that supply blood to the heart itself. This is called coronary artery disease and happens slowly over time. It's the major reason people have heart attacks. Other kinds of heart problems may happen to the valves in the heart, or the heart may not pump well and cause heart failure. Some people are born with heart disease.
What we call normal rhythm is stimulated by a group of cells in the upper chamber of our heart called the atrium. This group of cells is in an area of the atrium called the sinus node and functions as a "natural pacemaker" stimulating the atria and then the ventricles of our heart to contract.In normal function (what doctors call normal sinus…