دورية أكاديمية
Serum vitamin B-12 in children presenting with vasovagal syncope.
| العنوان: | Serum vitamin B-12 in children presenting with vasovagal syncope. |
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| المؤلفون: | Pektas A; Department of Pediatric Cardiology, Afyon Kocatepe University Hospital, Dortyol Mah, Afyonkarahisar, Turkey. Email: drayhanpektas@hotmail.com; ayhan1978@gmail.com., Koken R; Department of Pediatric Neurology, Afyon Kocatepe University Hospital, Dortyol Mah, Afyonkarahisar, Turkey., Koca HB; Department of Biochemistry, Afyon Kocatepe University Hospital, Dortyol Mah, Afyonkarahisar, Turkey. |
| المصدر: | Asia Pacific journal of clinical nutrition [Asia Pac J Clin Nutr] 2018; Vol. 27 (1), pp. 176-181. |
| نوع المنشور: | Journal Article |
| اللغة: | English |
| بيانات الدورية: | Publisher: Qingdao University Country of Publication: Australia NLM ID: 9440304 Publication Model: Print Cited Medium: Print ISSN: 0964-7058 (Print) Linking ISSN: 09647058 NLM ISO Abbreviation: Asia Pac J Clin Nutr Subsets: MEDLINE |
| أسماء مطبوعة: | Publication: 2023- : Qingdao : Qingdao University Original Publication: London, UK : Published for the Asia Pacific Clinical Nutrition Society by Smith-Gordon, |
| مواضيع طبية MeSH: | Syncope, Vasovagal/*blood , Syncope, Vasovagal/*complications , Vitamin B 12/*blood , Vitamin B 12 Deficiency/*blood , Vitamin B 12 Deficiency/*complications, Adolescent ; Female ; Humans ; Male ; Posture ; Prospective Studies |
| مستخلص: | Background and Objectives: The present study aims to determine the serum vitamin B-12 in children presenting with vasovagal syncope. Methods and Study Design: This is a prospective review of 160 children presenting with vasovagal syncope. Subgroup analysis was done based on the results of head up tilt test. Results: Head up tilt test gave positive results in 80 children and yielded negative results in the remaining 80 children. The tilt test positive children had significantly lower thyroid stimulating hormone concentrations (p=0.06), total iron binding capacity (p=0.04) and serum vitamin B-12 (p=0.01). The prevalence of vitamin B-12 deficiency was significantly higher in the tilt positive group (80% vs 52.5%, p=0.001). Out of 80 children with positive tilt test, 8 children (10%) showed cardioinhibitory response, 22 children (27.5%) demonstrated a vasodepressor response, 24 children (30%) displayed mixed response and 26 children (32.5%) had the postural orthostatic tachycardia syndrome. Erythrocyte sedimentation rate was significantly lower in the mixed response group than in the vasodepressor group (6.2±0.8 mm/h vs 14.3±2.5 mm/h, p=0.001). Serum vitamin B-12 was significantly lower in the postural orthostatic tachycardia syndrome (POTS) group than in the vasodepressor group (240.8±38.2 pg/mL vs 392.7±27.1 pg/mL, p=0.001). The prevalence of vitamin B-12 deficiency was significantly higher in the POTS group than in the vasodepressor group (92.3% vs 45.5%, p=0.001). Conclusions: Vitamin B-12 deficiency causes reduction in myelinization, deceleration in nerve conduction and elevation in serum concentrations of noradrenaline. These factors may contribute to the impairment of autonomic functions which are involved in the pathogenesis of vasovagal syncope. |
| المشرفين على المادة: | P6YC3EG204 (Vitamin B 12) |
| تواريخ الأحداث: | Date Created: 20171210 Date Completed: 20190906 Latest Revision: 20190906 |
| رمز التحديث: | 20221213 |
| DOI: | 10.6133/apjcn.022017.17 |
| PMID: | 29222896 |
| قاعدة البيانات: | MEDLINE |
Full Text Finder | تدمد: | 0964-7058 |
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| DOI: | 10.6133/apjcn.022017.17 |