James Silver was an early settler in the area now known as Silver Spring Township which was organized as a Township bearing his name in 1757. The Township is situated on major east-west and north-south transportation routes, and shares the rich Revolutionary and Civil War heritage of the region.
Causes of pericardial effusion can include: 1  Inflammation of the pericardium following heart surgery or a heart attack. 2  Autoimmune disorders, such as rheumatoid arthritis or lupus. 3  Spread of cancer (metastasis), particularly lung cancer, breast cancer, melanoma, leukemia, non-Hodgkin's lymphoma or Hodgkin's disease.
Pericarditis is a feature of several autoimmune conditions, especially systemic lupus erythematosus. It is also associated with renal failure and hemodialysis. Furthermore, pericarditis can develop because of injury to the pericardium as a result of trauma, surgery, instrumentation, or radiation therapy.onversely, cardiac tamponade and constrictive pericarditis lead to important and distinctive hemodynamic changes. Because the heart is constricted by fluid or a rigid fibrinous or calcified pericardium, negative intrathoracic pressure during inspiration is not transmitted to the pericardial sac.