- The lifetime incidence of an episode of vasovagal syncope is more than 33%
- Vasovagal syncope: An overview of pathophysiological mechanisms - June 2023 ($28 PDF)
- Vasovagal Syncope 5.4 X more likely if low vitamin D - meta-analysis May 2023
- Vitamin D Deficiency and Vasovagal Syncope in Children and Adolescents - Feb 2021
- Is there any link between vitamin D deficiency and vasovagal syncope? - Feb 2020
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The lifetime incidence of an episode of vasovagal syncope is more than 33%
Note: Founder of VitaminDwiki had one incidence of VVS while on Pritikin Diet
Vasovagal syncope: An overview of pathophysiological mechanisms - June 2023 ($28 PDF)
86 references are free online
Vasovagal Syncope 5.4 X more likely if low vitamin D - meta-analysis May 2023
Association between vitamin D deficiency and vasovagal syncope: A systematic review and meta-analysis
Clin Cardiol . 2023 May 24. doi: 10.1002/clc.24035
Amirmohammad Khalaji 1 2 3, Amir Hossein Behnoush 1 2 3, Masih Tajdini 1
Vasovagal syncope (VVS) is the most prevalent type of syncope and its management includes pharmacologic and non-pharmacologic interventions. Recently, studies have investigated vitamin D levels in VVS patients. In this systematic review and meta-analysis, we aim to review these studies to find possible associations between vitamin D deficiency and vitamin D levels with VVS. International databases including Scopus, Web of Science, PubMed, and Embase were searched with keywords related to "vasovagal syncope" and "vitamin D." Studies were screened and the data were extracted from them. Random-effect meta-analysis was conducted to calculate the standardized mean difference (SMD) and 95% confidence interval (CI) for vitamin D levels in comparison to VVS patients and controls. Also, VVS occurrence was measured and the odds ratio (OR) and 95% CI were calculated for comparison of vitamin D deficient cases and nondeficient individuals. Six studies were included with 954 cases investigated. Meta-analysis showed that patients with VVS had significantly lower vitamin D serum levels in comparison to non-VVS cases (SMD -1.05, 95% CI -1.54 to -0.57, p-value < .01).
Moreover, VVS occurrence was higher in vitamin D-deficient individuals (OR 5.43, 95% CI 2.40 to 12.27, p-value < .01). Our findings which show lower vitamin D levels in VVS patients can have clinical implications in order for clinicians to pay attention to this when approaching VVS. Further randomized controlled trials are certainly warranted to assess the role of vitamin D supplementation in individuals with VVS.
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Vitamin D Deficiency and Vasovagal Syncope in Children and Adolescents - Feb 2021
Front. Pediatr., 25 February 2021 | https://doi.org/10.3389/fped.2021.575923
Qingyou Zhang, Yan Sun, Chunyu Zhang, Jianguang Qi and Junbao Du*
Department of Pediatrics, Peking University First Hospital, Beijing, ChinaVitaminDWiki
- Common cause of dizziness (BPPV) reduced 5 X by several doses of 50,000 IU of vitamin D – 2015, 2016
- Vertigo treated by Vitamin D - many studies
- Hypothesis - Dysfunction of Autonomic Nervous System is associated with low vitamin D – April 2017
Items in both categories Infant/Child and Cardiovascular are listed here:
- Childhood Cancer Survivors have worse arteries due to anticancer therapy – May 2023
- Sudden drop of heart rate (vasovagal syncope) is associated with lower vitamin D - several studies
- Vitamin D levels dropped 42 percent immediately after pediatric cardiac surgery – Dec 2019
- Extreme Heat Events increase congenital heart defects (perhaps low vitamin D) - Jan 2019
- Congenital Heart problems - vitamin D levels drop even lower after surgery, loading dose probably required - thesis 2015
- Cardiovascular risk factors in children associated with low vitamin D – May 2012
- Congestive heart failure in infants virtually cured by 1000 IU of vitamin D – RCT Feb 2012
- Babies Receive Heart Transplants Instead of Vitamin D Treatment
See also web
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Aims: To investigate the association of vitamin D deficiency with cardiovascular autonomic nervous system function in children and adolescents with vasovagal syncope (VVS).
Methods: This study recruited 76 pediatric patients with VVS and 15 healthy children. The 25-hydroxyvitamin D levels in serum among the participants were evaluated. Heart rate variability analysis including SDNN, rMSSD, and SDANN was tested in patients with VVS. The correlation between indices of time-domain analysis and serum vitamin D status of the children with VVS was investigated.
Results: In this work, 25-hydroxyvitamin D levels in serum among VVS cases remarkably decreased compared with those among healthy controls (48.76 ± 19.25 vs. 67.62 ± 15.46 nmol/L, p < 0.01). The vitamin D deficient patients with VVS exhibited a lower rMSDD value compared to the non-deficient group with VVS (45.56 ± 16.87 vs. 61.90 ± 20.38 ms, p < 0.001, respectively). Pearson correlation analysis indicated that serum 25-hydroxyvitamin D levels had positive correlation with rMSDD values (r = 0.466, p < 0.001).
Conclusions: As suggested by our data, VVS children and adolescents with vitamin D deficiency may have cardiac autonomic dysfunction and cardiac vagal tone decreases with the reduction in vitamin D level.
- Wieling W, Ganzeboom KS, Saul JP. Reflex syncope in children and adolescents. Heart.(2⑻4) 90:1094-100.doi:10.1136/hrt.2⑻3.022996
- Shen WK, Sheldon RS, Benditt DG, Cohen MI, Forman DE, Goldberger ZD, et al. 2017 ACC/AHA/HRS guideline for the evaluation and management of patients with syncope: a report of the American College of Cardiology/American Heart Association task force on clinical practice guidelines and the heart rhythm society. Circulation. (2017) 136:e60-122.doi:10.1161/CIR.⑻⑻⑻⑻⑻⑻0538
- Zhang Q, Du J, Wang C, Du Z, Wang L, Tang C. The diagnostic protocol in children and adolescents with syncope: a multi-centre prospective study. Acta Paediatr.(2⑻9) 98:879-84.doi:10.mi/j.1651-2227.2008.01195.x
- Ng J, Sheldon RS, Ritchie D, Raj V, Raj SR. Reduced quality of life and greater psychological distress in vasovagal syncope patients compared to healthy individuals. Pacing Clin Electrophysiol. (2019) 42:180- 8.doi:10.1111/pace.13559
- Jarjour IT, Jarjour LK. Low iron storage in children and adolescents with neurally mediated syncope. J Pediatr. (2008) 153:40-4. doi: 10.1016/j.jpeds.2008.01.034
- Oner T, Guven B, Tavli V, Mese T, Yilmazer MM, Demirpence S. Postural orthostatic tachycardia syndrome (POTS) and vitamin B12 deficiency in adolescents. Pediatrics. (2014) 133:e138-42. doi: 10.1542/peds.2012-3427
- Blitshteyn S. Vitamin B1 deficiency in patients with postural tachycardia syndrome (POTS). Neurol Res. (2017) 39:685 doi: 10.1080/01616412.2017.1331895
- Wimalawansa SJ. Vitamin D and cardiovascular diseases: causality. J Steroid Biochem Mol Biol. (2018) 175:29-43. doi: 10.1016/j.jsbmb.2016.12.016
- Xu WR, Jin HF, Du JB. Vitamin D and cardiovascular risk in children. Chin MedJ. (2017) 130:2857-62. doi: 10.4103/0366-6999.215500
- Tak YJ, Lee JG, Kim YJ, Lee SY, Cho BM. 25-hydroxyvitamin D and its relationship with autonomic dysfunction using time- and frequency- domain parameters of heart rate variability in Korean populations: a cross-sectional study. Nutrients. (2014) 6:4373-88. doi: 10.3390/nu61 04373
- Vimaleswaran KS, Cavadino A, Berry DJ, Lifelines Cohort Study Investigators, Jorde R, Dieffenbach AK, et al. Association of vitamin D status with arterial blood pressure and hypertension risk: a mendelian randomisation study. Lancet Diabetes Endocrinol. (2014) 2:719-29. doi: 10.1016/S2213-8587(14)70113-5
- Ometto F, Stubbs B, Annweiler C, Dural GT, Jang W, Kim HT, et al. Hypovitaminosis D and orthostatic hypotension: a systematic review and meta-analysis. J Hypertens. (2016) 34:1036-43.doi:10.1097/HJH.⑻⑻⑻⑻⑻⑻0907
- Antiel RM, Caudill JS, Burkhardt BE, Brands CK, Fischer PR. Iron insufficiency and hypovitaminosis D in adolescents with chronic fatigue and orthostatic intolerance. South Med J. (2011) 104:609-11. doi: 10.1097/SMJ.0b013e3182246809 Usalp S, Kemal H, Yuksek U, Yaman B, Gunsel A, Edebal O, et al. Is there any link between vitamin D deficiency and vasovagal syncope? J Arrhythm. (2020) 36:371-6. doi: 10.1⑻2/joa3.12309
- Holick MF, Binkley NC, Bischoff-Ferrari HA, Gordon CM, Hanley DA, Heaney RP, et al. Evaluation, treatment, and prevention of vitamin D deficiency: an endocrine society clinical practice guideline. J Clin Endocrinol Metab. (2011) 96:1911-30. doi: 10.1210/jc.2011-0385
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- Tonnesen R, Schwarz P, Hovind P, Jensen LT. Modulation of the sympathetic nervous system in youngsters by vitamin-D supplementation. Physiol Rep. (2018) 6:e13635. doi: 10.14814/phy2.13635
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Is there any link between vitamin D deficiency and vasovagal syncope? - Feb 2020
Journal of Arrhythmia 36(2) DOI: 10.1002/joa3.12309
Songül Usalp MD Hatice Kemal MD Ümit Yüksek MD Belma Yaman MD Aziz Günsel MD Oğuzhan Edebal MD Onur Akpınar MD Levent Cerit MD Hamza Duygu MD
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This study aimed to investigate serum 25OHD levels between patients with vasovagal syncope (VVS) diagnosed with head‐up tilt table test (HUTT) and age‐matched healthy people.
The study included 75 consecutive patients (32.3 ± 10.7 years), who presented with syncope and underwent HUTT and 52 healthy controls (32.9 ± 14.1 years). HUTT patients were divided into two groups according to whether there was syncope response to the test. Patients underwent cardiac, psychiatric, and neurological investigation. Serum 25OHD levels were measured by chemiluminescent microparticle immunoassay method.
There was no difference between the two groups in terms of age, gender, body mass index (BMI), echocardiographic findings (P > .05). Mean serum 25OHD (24.5 ± 6.3 vs 20.1 ± 8.8 ng/mL, P = .003) and vitamin B12 levels (436.4 ± 199.2 vs 363.1 ± 107.6 pg/mL, P = .009) was lower in syncope patients when compared to the control group. In correlation analyses, syncope was shown as correlated with the vitamin D (r = −264, P = .003) and vitamin B12 levels (r = −233, P = .009). But, multivariate regression analyses showed that only vitamin D increased risk of syncope [OR: 0.946, 95% CI (0.901‐0.994)]. There was no difference in terms of age, gender, BMI, echocardiographic findings between the in HUTT positive (n = 45) and negative groups (n = 29). Only vitamin D level was significantly lower in HUTT positive group (17.5 ± 7.7 vs 24.4 ± 9.1 ng/mL, P = .002). There was no difference among in the vasovagal subgroups in terms of vitamin D level and other features.
Vitamin D and B12 levels were reasonably low in syncope patients, but especially low Vitamin D levels were associated with VVS diagnosed in HUTT.
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Sudden drop of heart rate (vasovagal syncope) is associated with lower vitamin D - several studies
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