premature junctional contraction
Also found in: Acronyms.
pre·ma·ture junc·tion·al con·trac·tion
(PJC) (prē'mă-chŭr' jungk'shŭn-ăl kŏn-trak'shŭn)A premature cardiac beat arising from the atrioventricular junction, accompanied by normal or abnormal QRS complexes.