title: A case of respiratory sinus arrhythmia and vasovagal attacks: use of cosinor analysis for diagnosis and for monitoring treatment.
abstract: An 18 year old girl presented with frequent vasovagal attacks and sinus arrhythmia. The amplitude of respiratory sinus arrhythmia assessed by cosinor analysis was 20%; the predicted value for a normal girl of this age is 4% and the 95% confidence interval is 0-8%. Treatment with propantheline, in a dose sufficient to reduce the amplitude of sinus arrhythmia to normal, abolished her symptoms.
mesh_terms: D000293:Adolescent; D001146:Arrhythmia, Sinus / Q000150:complications*; D004562:Electrocardiography; D005260:Female; D006801:Humans; D011413:Propantheline / Q000627:therapeutic use; D013575:Syncope / Q000150:complications* / Q000175:diagnosis / Q000517:prevention & control
chemical_list: D011413:Propantheline