title: Premature beats in healthy subjects 40-79 years of age.
mesh_terms: D000328:Adult; D000368:Aged; D001145:Arrhythmias, Cardiac / Q000175:diagnosis* / Q000453:epidemiology; D003718:Denmark; D004562:Electrocardiography; D005260:Female; D006325:Heart Atria; D006352:Heart Ventricles; D006801:Humans; D008297:Male; D008875:Middle Aged