A design approach is a general philosophy that may or may not include a guide for specific methods. Some are to guide the overall goal of the design. Other approaches are to guide the tendencies of the designer. A combination of approaches may be used if they don't conflict.
Bradycardia can be caused by: 1  Changes in the heart that are the result of aging. 2  Diseases that damage the heart's electrical system. These include coronary artery disease, heart attack, and infections such as endocarditis and myocarditis. 3  Conditions that can slow electrical impulses through the heart.
This information shows the various causes of Sinus bradycardia, and how common these diseases or conditions are in the general population. This is not a direct indication as to how commonly these diseases are the actual cause of Sinus bradycardia, but gives a relative idea as to how frequent these diseases are seen overall.