title: Concealed bundle of His extrasystoles simulating nonconducted atrial premature beats.
mesh_terms: D000787:Angina Pectoris / Q000503:physiopathology; D001145:Arrhythmias, Cardiac / Q000175:diagnosis*; D003937:Diagnosis, Differential; D004562:Electrocardiography; D006327:Heart Block / Q000175:diagnosis; D006329:Heart Conduction System; D006801:Humans; D008297:Male; D008875:Middle Aged