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.
Sinus bradycardia is a heart disorder characterized by the sinus node firing at a slow (<60 bpm) rate. Causes of sinus bradycardia include: Sick sinus syndrome ('brachy-tachy' syndrome) associated with mitral dysplasia. Atrial tachycardia. Pericarditis. Bundle branch block. Atrial standstill. Normal physiology in Greyhounds.