title: P wave of electrocardiogram in early ischaemic heart disease.
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D003327:Coronary Disease / Q000150:complications / Q000175:diagnosis* / Q000503:physiopathology; D004562:Electrocardiography; D006801:Humans; D007702:Kinetocardiography; D008875:Middle Aged; D010701:Phonocardiography; D013614:Tachycardia, Paroxysmal / Q000150:complications