title: ECG of the month. Group beating. Atrial and ventricular premature impulses.
authors.affiliation: Department of Medicine, Texas Tech University Health Services Center, USA.
authors.forename: J I
authors.initials: JI
authors.lastname: Martinez-Lopez
mesh_terms: D018880:Atrial Premature Complexes / Q000175:diagnosis*; D003937:Diagnosis, Differential; D004562:Electrocardiography; D006327:Heart Block / Q000175:diagnosis; D006801:Humans; D018879:Ventricular Premature Complexes / Q000175:diagnosis*