“Acute” means the condition develops quickly or suddenly. The pericardium consists of two thin layers of tissue. Fluid separate these layers, helping prevent them from rubbing together as the ...

A pericardial friction rub is a "scratchy" or "squeak" heart sound caused by the rubbing of the inflamed tissue layers of the ...

A pericardial effusion occurs when a significant amount of fluid fills the pericardial space. Individuals without pericardial effusion have a small amount of pericardial fluid (15 mL to 50 mL ...