Objective:To investigate the relationship between exercise related syncope and iron deficiency anemia in children, and analyze the effect of nutrition supply on exercise related syncope.Methods:Three hundred and six children with iron deficiency anemia in Quanzhou Medical College People′s Hospital Affiliated from June 2018 to June 2020 were enrolled, and they were divided into two groups: observation group (105 Children with exercise related syncope) and control group (201 Children without exercise related syncope). General data, red blood cell parameters, iron metabolism index and blood trace element level were compared between two groups. The daily food composition, the intake of three major nutrients, trace elements and Vitamins were analyzed.Results:The body mass index and waist-to-hip ratio in the observation group were lower than those in the control group, the blood oxygen saturation was lower than that in the control group, the proportion of males, severe anemia, picky eaters and more intake of snack were higher than those in the control group, the differences were statistically significant ( P<0.05). The levels of hemoglobin, mean corpuscular hemoglobin concentration and mean corpuscular volume in the observation group were lower than those in control group: (70.12 ± 9.68) g/L vs. (83.64 ± 10.12) g/L, (20.12 ± 3.64) pg vs. (26.97 ± 3.52) pg, (63.46 ± 8.46) fl vs. (71.34 ± 8.12) fl; and the red blood cell distribution width was higher than that in control group: 0.258 ± 0.058 vs. 0.201 ± 0.064, the differences were statistically significant ( P<0.05). The levels of serum ferritin content and total iron binding capacity in observation group were higher than those in the control group: (136.58 ± 28.71) ng/L vs. (113.21 ± 24.45) ng/L, (69.64 ± 7.23) μmol/L vs. (56.48 ± 8.65) μmol/L, the levels of serum ferritin and transferin saturation were lower than those in the control group: (15.32 ± 4.15) μmol/L vs. (17.69 ± 4.21) μmol/L, 0.198 ± 0.056 vs. 0.265 ± 0.062, the differences were statistically significant ( P<0.05). The levels of blood calcium and zinc in the observation group were lower than those in the control group: (5.44 ± 0.28) mmol/L vs. (5.63 ± 0.34) mmol/L, (63.23 ± 2.73) μmol/L vs. (68.42 ± 2.65) μmol/L, the differences were statistically significant ( P<0.05). The daily intake of cereals, meats, vegetables and fruits, beans, eggs and milk in the observation group were lower than those in the control group, the daily intake of sugar and protein in the observation group were lower than those in the control group, the daily intake of iron, Vitamin C and Vitamin A in the observation group were lower than those in the control group, the differences were statistically significant ( P<0.05). Conclusions:Iron deficiency anemia in Children may be one of the risk factors of exercise related syncope. Health education should be strengthened for children and their parents. Moreover, change of unhealthy diet behavior and adjustment of dietary structure can reduce the incidence of exercise related syncope.

BACKGROUND:In clinical application,the therapeutic effect of transcranial magnetic stimulation depends on the ability to accurately target the areas of the brain that need to be stimulated.In recent years,with the development of neuronavigation systems,mobile augmented reality technology,and the new methods of processing magnetic resonance imaging(MRI)data,the accuracy of stimulus target localization and the optimization of target selection are expected to improve further. OBJECTIVE:To review the principle of MRI-based image navigation and its application in transcranial magnetic stimulation and summarize the roles of different modal MRI data analyses in guiding the selection of target areas for transcranial magnetic stimulation. METHODS:An online computer search for relevant literature was performed in PubMed,CNKI database and WanFang database,with the keywords"transcranial magnetic stimulation,coil positioning,neuronavigation,augmented reality,magnetic resonance,theory."Finally,63 documents were included for review. RESULTS AND CONCLUSION:Among the traditional methods of positioning transcranial magnetic stimulation coils,the"5 cm rule"and the international electroencephalogram 10-20 positioning method are the most commonly used.These methods have the advantages of simplicity and economy,but they rely too much on the operator's experience and there were technical differences between operators.The neuronavigation system,which is based on stereotactic technology,is the guiding method for positioning transcranial magnetic stimulation coils with the highest visual degree and accuracy.It achieves visual positioning through MRI data acquisition,3D brain reconstruction,head model registration and stereogeometric positioning.It has high application value in clinical treatment and scientific research,but it cannot be promoted in medical institutions due to its high cost.For various medical institutions,mobile augmented reality is a cost-effective and efficient alternative to the neuronavigation system,which achieves visual positioning of brain tissue under the scalp through MRI data acquisition,2D/3D image construction,virtual image and real brain image superposition.It has the advantages of directly visualization and low cost,and is expected to be popularized and applied in primary medical units.Although the superiority of clinical efficacy of visual coil positioning over the electroencephalogram 10-20 localization strategy has not yet been fully demonstrated,with the progress of brain MRI data analysis,visual positioning is expected to further optimize the target selection strategy of transcranial magnetic stimulation therapy and to improve the response rate and individuation degree of transcranial magnetic stimulation treatment.This is a promising and challenging research direction in the future.