Sick sinus syndrome Causes
Sick sinus syndrome causes is cardiomyopathy, coronary heart disease, myocarditis, are also found in connective tissue diseases, metabolic diseases, or invasive diseases, many cases of unknown etiology. The cardiac conduction system degeneration is most common causes of sick sinus syndrome. In addition to sino-atrial node and its neighboring organizations, the rest of the cardiac conduction system may also be affected, causing a number of potential pacemaker and conduction dysfunction. Atrioventricular junction combined pacing or conduction dysfunction, also known as dual-node lesions; At the same time involved the right and left bundle branch of conduction system disease known as the whole.
Most of the slow course of the development of sick sinus syndrome, from happen symptoms to severe symptoms for 5 ~ 10 years or more. A small number of acute, in acute myocardial infarction and acute myocarditis.