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Original Article
Cardiology
Vasovagal syncope with mild versus moderate autonomic dysfunction: a 13-year single-center experience
Han Eoul Lee, Dong Won Lee
Clin Exp Pediatr. 2022;65(1):47-52.   Published online June 1, 2021
Question: It is well known that autonomic dysfunction contributes to vasovagal syncope (VVS). Does the degree of autonomic dysfunction contribute to clinical manifestations, diagnostic methods, treatment, and prognosis?
Finding: The clinical manifestations, diagnostic methods, treatment, and prognosis differ between patients with mild and moderate degrees of autonomic dysfunction.
Meaning: VVS is caused by autonomic dysfunction, but autonomic dysfunction severity need not be classified.
Baseline heart rate variability in children and adolescents with vasovagal syncope
Sun Hee Shim, Sun-Young Park, Se Na Moon, Jin Hee Oh, Jae Young Lee, Hyun Hee Kim, Ji Whan Han, Soon Ju Lee
Clin Exp Pediatr. 2014;57(4):193-198.   Published online April 30, 2014
Purpose

This study aimed to evaluate the autonomic imbalance in syncope by comparing the baseline heart rate variability (HRV) between healthy children and those with vasovagal syncope.

Methods

To characterize the autonomic profile in children experiencing vasovagal syncope, we evaluated the HRV of 23 patients aged 7-18 years and 20 healthy children. These children were divided into preadolescent (<12 years) and adolescent groups....

Change of Cerebral Blood Flow during Tilt Tests in Children with Vasovagal Syncope
Su Jung Kim, Hye Won Yom, Young Mi Hong, Jung Hyen Yoo, Sook Hee Lee, Chong Hee Kim
Clin Exp Pediatr. 2003;46(10):983-988.   Published online October 15, 2003
Purpose : Syncope appears to be common. However, the mechanism of syncope is not clear. Increased vagal activity and withdrawal of sympathetic stimulation cause hypotension, bradycardia and finally loss of consciousness. The purpose of this study was to evaluate changes of cerebral blood flow velocity, blood pressure, and heart rate during tilt test in children with vasovagal syncope. Methods : Sixty...
The Usefulness of the Head-up Tilt Test for Diagnosis of Syncope in Pediatric Patients
Hye Jin Yun, Sun Hee Rim, So Young Yun, Jae Kon Ko, Young Hwue Kim, In Sook Park
Clin Exp Pediatr. 2001;44(12):1441-1447.   Published online December 15, 2001
Purpose : The purpose of this study is to examine the usefulness of the head-up tilt test for diagnosis of unexplained syncope in children. Methods : Head-up tilt test results and clinical features of 41 children with unexplained syncope, presyncope, dizziness and seizure were studied from January, 1997 through January, 2001 at Asan Medical Center. Medical records of children were reviewed retrospectively. The children...