title: Case 2: a patient with an intermittent racing heartbeat.
abstract: Most clinicians currently rely on patient history and specific electrocardiographic criteria to establish the diagnosis of arrhythmias. However, as illustrated by this case, the physical examination-especially auscultation of the first heart sound-can also provide useful diagnostic clues.
authors.affiliation: American Medical Communications, Inc, Houston, Texas 77032, USA.
authors.forename: V E
authors.initials: VE
authors.lastname: Friedewald
authors.forename: J P
authors.initials: JP
authors.lastname: Ornato
authors.forename: B
authors.initials: B
authors.lastname: Olshansky
mesh_terms: D000293:Adolescent; D002036:Bundle of His / Q000503:physiopathology; D004562:Electrocardiography; D006326:Heart Auscultation; D006801:Humans; D008297:Male; D013614:Tachycardia, Paroxysmal / Q000175:diagnosis* / Q000209:etiology