title: ORTHOSTATIC CHAOTIC HEART ACTION WITHOUT EVIDENCE OF ORGANIC HEART DISEASE. A CASE REPORT.
mesh_terms: D000293:Adolescent; D001145:Arrhythmias, Cardiac; D004562:Electrocardiography; D006321:Heart; D006801:Humans; D005082:Physical Exertion; D011187:Posture; D013575:Syncope
keywords: ADOLESCENCE; ARRHYTHMIA; ELECTROCARDIOGRAPHY; EXERTION; POSTURE; SYNCOPE