J Korean Pediatr Soc.  2003 Dec;46(12):1274-1278.

A Case of Micturition Syncope in a Child

• Lee SY
• Ryu SJ
• Kim DS
• Kim YH
• Ko TS
• Kim JM

Abstract

Syncope in children and adolescents have a common occurrence according for up to 15% before adulthood. Micturition syncope, a kind of situational syncope, can be considered a form of reflex syncope. It can typically occur in healthy young men after rising from bed in the early morning who experience sudden loss of consciousness during or immediately after urination. The mechanism of micturition syncope is not completely understood, but it has been suggested that vasovagal reflex mediated bradycardia and peripheral vasodilation and decreased venous return due to Valsalva effect and standing position lead to the decrease in cerebral blood flow resulting in syncope. The causes of syncope are variable. So complete history taking, physical examination, electrocardiography, exercise stress test, echocardiography, head-up tilt table test, electroencephalography(EEG), brain magnetic resonance image and urodynamic study should be required for the diagnosis of micturition syncope. There were several reports about micturition syncope. However, literature of micturition syncope at the pediatric age has rarely been reported in Korea so far. Therefore, we report a case of a 9- year-old boy with micturition syncope with typical EEG findings of high amplitude delta wave and flattening during syncope.

Keyword

Syncope; Micturition; Head-up tilt test; Electroencephalography

MeSH Terms

Adolescent
Bradycardia
Brain
Child*
Diagnosis
Echocardiography
Electrocardiography
Electroencephalography
Exercise Test
Humans
Korea
Male
Physical Examination
Reflex
Syncope*
Tilt-Table Test
Unconsciousness
Urination*
Urodynamics
Vasodilation