title: P waves in ECG--variations on a theme.
authors.affiliation: Department of Paediatrics, National University Hospital, Singapore.
authors.forename: S C
authors.initials: SC
authors.lastname: Quek
authors.forename: K S
authors.initials: KS
authors.lastname: Ng
authors.forename: P S
authors.initials: PS
authors.lastname: Low
mesh_terms: D001145:Arrhythmias, Cardiac / Q000175:diagnosis*; D002648:Child; D003937:Diagnosis, Differential; D004502:Education, Medical, Continuing; D004562:Electrocardiography; D005260:Female; D006801:Humans