pericardial friction rub [Gk, peri, around, kardia, heart; L, fricare, to rub; ME, rubben] , the rubbing together of inflamed membranes of the pericardium, as may occur in pericarditis or after a myocardial infarction. It produces a sound audible on auscultation. Also called pericardial murmur, pericardial rub.
