title: Unusual giant P waves in a boy of twelve with cardiomegaly.
mesh_terms: D001344:Autopsy; D006332:Cardiomegaly / Q000150:complications / Q000000981:diagnostic imaging / Q000473:pathology / Q000503:physiopathology*; D002648:Child; D004562:Electrocardiography; D006325:Heart Atria / Q000473:pathology / Q000503:physiopathology; D006801:Humans; D008297:Male; D011859:Radiography; D013927:Thrombosis / Q000150:complications; D014672:Vectorcardiography