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.
Related to bradycardia: tachycardia. see arrhythmiaarrhythmia. , disturbance in the rate or rhythm of the heartbeat. Various arrhythmias can be symptoms of serious heart disorders; however, they are usually of no medical significance except in the presence of additional symptoms. ..... Click the link for more information. . decrease in frequency of heart contractions to less than 60 beats per minute. Bradycardia may be found as a normal, constitutionally conditioned phenomenon in perfectly healthy persons, in well-trained athletes, and as one of the symptoms in many diseases.