Oreto, G Bigeminal and trigeminal distribution of ventricular extrasystoles as an expression of "atypical" concealed bigeminy. [electronic resource] - Chest Oct 1987 - 758-61 p. digital Publication Type: Case Reports; Journal Article ISSN: 0012-3692 Standard No.: 10.1378/chest.92.4.758 doi Subjects--Topical Terms: Cardiac Complexes, Premature--physiopathologyCoronary Disease--physiopathologyElectrocardiographyHeart Conduction System--physiopathologyHumansMaleMiddle Aged