Clinical and Experimental Pediatrics

Original Article

Cardiology

Vasovagal syncope and postural orthostatic tachycardia syndrome in adolescents: transcranial doppler versus autonomic function test results

Dong Won Lee

Clin Exp Pediatr. 2025;68(9):673-679. Published online August 6, 2025

Question: Vasovagal syncope (VVS) and postural orthostatic tachycardia syndrome (POTS) are representative forms of neurally mediated syncope. What influences the occurrence of each?
Finding: Autonomic function test results did not differ, but cerebral blood flow during diastole on transcranial doppler differed between VVS and POTS.
Meaning: Differences in diastolic cerebral blood flow velocity play an important role in VVS and POTS.

DOI: https://doi.org/10.3345/cep.2025.00927

Changes of Cerebral Blood Flow Velocity before and after Closure of Ductus Arteriosus using Doppler Ultrasound in Normal Full-term Newborns

Myung Su Lee, Young Mi Hong, Kyung Hee Kim

Clin Exp Pediatr. 1995;38(12):1620-1628. Published online December 15, 1995

Purpose : With PDA, major fluctuations of blood flow are noted between opening and closure of ductus arteriosus and there is an increase in the amplitude of each pulse of blood flow. The purpose of this study was to evaluate the changes of cerebral blood flow before and after closure of ductus arteriosus in healthy term newborns. Methods : Forty-two normal term...

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Longitudinal Change of Cerebral Blood Flow Velocity in Neonates with Perinatal Asphyxia and Hypoxic-Ischemic Encephalopathy with Doppler Technique

Kook In Park, Dong Kwan Han, Joon Soo Lee, Ran Namgung, Chul Lee

Clin Exp Pediatr. 1994;37(9):1196-1204. Published online September 15, 1994

Fifty-three full-term, preterm, term-SGA newborn infants with perinatal asphyxia and 16 full-term infants with hypoxic-ischemic encephalopathy were studied with color Doppler songraphy to assess the postnatal change of the cerebral blood flow velocity(CBFV) longitudinally. A control group of 81 healthy infants also had CBFV recordings during the 1st week of life. Pourcelot Resistance index(PI) and area under the velocity curve(AUVC)...

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Longitudinal Change of Cerebral Blood Flow Velocity in Neonates with the Doppler Technique

Kook In Park, Dong Gwan Han, Ran Namgung, Chul Lee, Jin Suk Suh, Myung Joon Kim

Clin Exp Pediatr. 1992;35(1):60-68. Published online January 15, 1992

Eighty-one asymptomatic preterm, term-SGA, and full term infants who were delivered at Yonsei University Severance Hospital from January to July 1990 were studied with color duplex imaging doppler sonography to assess the postnatal changes of the cerebral blood flow velocity longitudinally. Pulsatility index (PI) and area under the velocity curve (AUVC) were calculated to quantitate changes in anterior cerbral artery blood...

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Changein Regional Cerebral Blood Flow Velocity in Premature Infant.

Young Kyoo Shin, Chang Sung Son, Joo Won Lee, Young Chang Tockgo

Clin Exp Pediatr. 1990;33(10):1333-1340. Published online October 31, 1990

In order to estimate the influence of systemic hemodynamic change in cerebral blood flow before and after closure of ductus arteriosus in premature mewborn infants, blood flow velocities of internal carotid artery (ICA), anterior cerebral artery (ACA) and middle cerebral artery (MCA) were measured in 17 premature newborn infants by pulsed Doppler ultrasonography. The data was compared with those of normal full-term infants by...

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