title: Group beating with pseudo-Wenckebach phenomenon.
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D001145:Arrhythmias, Cardiac / Q000503:physiopathology*; D003327:Coronary Disease / Q000503:physiopathology; D004562:Electrocardiography; D005260:Female; D006801:Humans