Pericardial fremitus is a vibration felt on the chest wall due to the friction of the surfaces of the pericardium over each other.

The classic medical sign of pericarditis is a pericardial rub.

A three-component rub distinguishes a pericardial rub and indicates the presence of pericarditis.

A pericardial friction rub, also pericardial rub, is an audible medical sign used in the diagnosis of pericarditis.

The murmur results from the rubbing of the pericardium against the pleura in the context of hyperdynamic circulation and tachycardia, and may mimic the sound of a pericardial rub.