Background The incidence of postural tachycardia syndrome （POTS） has been increasing in children and adolescents,while clinical characteristics of POTS in the pediatric population are not fully understood.Methods An...Background The incidence of postural tachycardia syndrome （POTS） has been increasing in children and adolescents,while clinical characteristics of POTS in the pediatric population are not fully understood.Methods An observational study was performed in 150 pediatric patients aged between 5 and 18 years who underwent head-up tilt test （HUTT） with the diagnosis of POTS at Peking University First Hospital from March 2008 to August 2013.Demographic data,clinical presentation,autonomic parameters,laboratory findings,and treatments were recorded.Results POTS in children commonly occurred in the age of 7-14 years.Dizziness （84.00％） was the most common symptom,followed by weakness （72.00％） and orthostatic syncope （62.67％）.Positive family history of orthostatic intolerance （Ol） was found in 24.64％ of children with POTS.And 33.09％ of them had preceding infection history as precipitating events.Ten percent of them suffered from orthostatic hypertension.Hyperadrenergic status was documented in 51.28％ of 39 patients who were tested for the standing norepinephrine levels.More than half of POTS patients,with 24-hour urinary sodium level ＜124 mmol/24 hours,were suitable for treatment of salt supplementation.At least 25.74％ of POTS patients were of positive acetylcholine receptor （AChR） antibody.Low iron storage in children with POTS was relatively rare.Most patients responded well to treatments,43.51％ of patients recovered,while 7.63％ of them had relapse after symptoms disappeared.Conclusions POTS is a relatively common condition with complex pathophysiology and heterogeneous clinical manifestation.A comprehensive therapeutic regimen is recommended for the treatment.展开更多
Background The abnormal blood volume regulation is one of the most important pathogenesis in postural tachycardia syndrome in children.This study was designed to investigate the plasma atrial natriuretic peptide and a...Background The abnormal blood volume regulation is one of the most important pathogenesis in postural tachycardia syndrome in children.This study was designed to investigate the plasma atrial natriuretic peptide and antidiuretic hormone levels in postural tachycardia syndrome children,and their associations with the changes in heart rate and blood pressure in head-up test.Methods Twenty-one postural tachycardia syndrome patients （（12±2） years） and 26 healthy children （（12±1） years） were included.According to blood pressure changes in head-up test,the postural tachycardia syndrome patients were divided into two subgroups：postural tachycardia syndrome with orthostatic hypertension and postural tachycardia syndrome without orthostatic hypertension.The plasma atrial natriuretic peptide and antidiuretic hormone levels were measured using enzyme-linked immunosorbent assay.Results The plasma atrial natriuretic peptide level in postural tachycardia syndrome patients was higher than the control （P=0.004）,whereas the difference in plasma antidiuretic hormone level between postural tachycardia syndrome and controls was not significant （P=0.222）.The plasma antidiuretic hormone level of patients suffering from postural tachycardia syndrome with orthostatic hypertension was much higher than that of children having postural tachycardia syndrome without orthostatic hypertension （P ＜0.05）.In postural tachycardia syndrome patients,the updght max heart rate was positively correlated with the plasma atrial natriuretic peptide level （r=0.490,P＜0.05） and the upright systolic blood pressure was positively correlated with the plasma antidiuretic hormone levels （r=0.472,P ＜0.05）.Conclusions There was a disturbance of plasma atrial natriuretic peptide and antidiuretic hormone in postural tachycardia syndrome children.展开更多
Objective： Postural tachycardia syndrome （POTS） is one of the major causes of orthostatic intolerance in children. We systematically reviewed the pathogenesis and the progress of individualized treatment for POTS i...Objective： Postural tachycardia syndrome （POTS） is one of the major causes of orthostatic intolerance in children. We systematically reviewed the pathogenesis and the progress of individualized treatment for POTS in children. Data Sources： The data analyzed in this review are mainly from articles included in PubMed and EMBASE. Study Selection： The original articles and critical reviews about POTS were selected for this review. Results： Studies have shown that POTS might be related to several factors including hypovolemia, high catecholamine status, abnormal local vascular tension, and decreased skeletal muscle pump activity. In addition to exercise training, the first-line treatments mainly include oral rehydration salts, beta-adrenoreceptor blockers, and alpha-adrenoreceptor agonists. However, reports about the effectiveness of various treatments are diverse. By analyzing the patient＇s physiological indexes and biomarkers before the treatment, the efficacy of medication could be well predicted. Conclusions： The pathogenesis of POTS is multifactorial, including hypovolemia, abnormal catecholamine state, and vascular dysfunction. Biomarker-directed individualized treatment is an important strategy for the management of POTS children.展开更多
Postural orthostatic tachycardia syndrome(POTS) is a relatively rare syndrome recognised since 1940. It is a heterogenous condition with orthostatic intolerance due to dysautonomia and is characterised by rise in hear...Postural orthostatic tachycardia syndrome(POTS) is a relatively rare syndrome recognised since 1940. It is a heterogenous condition with orthostatic intolerance due to dysautonomia and is characterised by rise in heart rate above 30 bpm from base line or to more than 120 bpm within 5-10 min of standing with or without change in blood pressure which returns to base line on resuming supine position. This condition present with various disabling symptoms such as light headedness, near syncope, fatigue, nausea, vomiting, tremor, palpitations and mental clouding, etc. However there are no identifiable signs on clinical examination and patients are often diagnosed to have anxiety disorder. The condition predominantly affects young female between the ages of 15-50 but is rarely described in older people. We describe an older patient who developed POTS which recovered over 12 mo. Recognising this condition is important as there are treatment options available to alleviate the disabling symptoms.展开更多
目的:分析体位性心动过速综合征(postural tachycardia syndrome, POTS)儿童及青少年直立试验过程中血流动力学变化及不同心脏指数(cardiac index, CI)患者血流动力学指标的差异。方法:回顾性分析26例POTS患者与12例健康对照者间直立试...目的:分析体位性心动过速综合征(postural tachycardia syndrome, POTS)儿童及青少年直立试验过程中血流动力学变化及不同心脏指数(cardiac index, CI)患者血流动力学指标的差异。方法:回顾性分析26例POTS患者与12例健康对照者间直立试验过程中总外周血管阻力指数(total peripheral vascular resistance index, TPVRI)、心率和血压的变化,并比较两组间各指标变化趋势。根据每位POTS患者直立试验过程中CI变化趋势将患者分为CI降低组(14例)与CI未降低组(12例),分析两组患者在直立试验过程中CI、TPVRI、心率、血压变化,并比较两组间各指标变化趋势。结果: POTS患者在直立试验过程中CI显著下降( F =6.936, P =0.001),心率明显增快( F = 113.926 , P <0.001),收缩压明显降低( F =6.049, P <0.001),而TPVRI ( F =2.031, P =0.138)和舒张压( F =2.018, P =0.113)无明显变化。健康对照组CI在直立后显著升高( F =3.646, P =0.016),同时心率明显增快( F = 43.970, P <0.001),收缩压( F =4.043, P =0.020)和舒张压( F =8.627, P <0.001)均明显升高,TPVRI ( F = 1.688, P =0.190)无明显变化。POTS患者与健康对照组比较,CI ( F =6.221, P= 0.001)、心率( F =6.203, P < 0.001)和收缩压( F =7.946, P <0.001)随时间变化趋势显著不同,而TPVRI和舒张压在两组间的变化趋势差异无统计学意义( P >0.05)。CI降低组与CI未降低组POTS患者在直立试验中CI变化趋势差异有统计学意义( F = 14.723, P <0.001),前者直立后收缩压明显降低( F =8.010, P <0.001),而后者却无明显变化( F =0.612, P = 0.639 ), TPVRI、心率和舒张压在CI降低组与CI未降低组间随时间变化趋势差异无统计学意义( P >0.05)。年龄是POTS患者直立后CI呈下降趋势的独立影响因素( P =0.013, OR =2.233;95% CI :1.183~4.216)。结论: POTS患者在直立试验过程中存在明显的血流动力学变化,不同患者心输出量变化可能不同,年龄是心输出量下降的独立影响因素。展开更多
文摘Background The incidence of postural tachycardia syndrome （POTS） has been increasing in children and adolescents,while clinical characteristics of POTS in the pediatric population are not fully understood.Methods An observational study was performed in 150 pediatric patients aged between 5 and 18 years who underwent head-up tilt test （HUTT） with the diagnosis of POTS at Peking University First Hospital from March 2008 to August 2013.Demographic data,clinical presentation,autonomic parameters,laboratory findings,and treatments were recorded.Results POTS in children commonly occurred in the age of 7-14 years.Dizziness （84.00％） was the most common symptom,followed by weakness （72.00％） and orthostatic syncope （62.67％）.Positive family history of orthostatic intolerance （Ol） was found in 24.64％ of children with POTS.And 33.09％ of them had preceding infection history as precipitating events.Ten percent of them suffered from orthostatic hypertension.Hyperadrenergic status was documented in 51.28％ of 39 patients who were tested for the standing norepinephrine levels.More than half of POTS patients,with 24-hour urinary sodium level ＜124 mmol/24 hours,were suitable for treatment of salt supplementation.At least 25.74％ of POTS patients were of positive acetylcholine receptor （AChR） antibody.Low iron storage in children with POTS was relatively rare.Most patients responded well to treatments,43.51％ of patients recovered,while 7.63％ of them had relapse after symptoms disappeared.Conclusions POTS is a relatively common condition with complex pathophysiology and heterogeneous clinical manifestation.A comprehensive therapeutic regimen is recommended for the treatment.
基金This study was funded by the grants from the National Twelfth Five- Year Plan for Science ＆ Technology Support （No. 2012BAI03B03）, the Major Basic Research Project of China （No. 2012CB517806 and No. 201 ICB503904） and the National Natural Science Foundation of China （No. 81121061）.
文摘Background The abnormal blood volume regulation is one of the most important pathogenesis in postural tachycardia syndrome in children.This study was designed to investigate the plasma atrial natriuretic peptide and antidiuretic hormone levels in postural tachycardia syndrome children,and their associations with the changes in heart rate and blood pressure in head-up test.Methods Twenty-one postural tachycardia syndrome patients （（12±2） years） and 26 healthy children （（12±1） years） were included.According to blood pressure changes in head-up test,the postural tachycardia syndrome patients were divided into two subgroups：postural tachycardia syndrome with orthostatic hypertension and postural tachycardia syndrome without orthostatic hypertension.The plasma atrial natriuretic peptide and antidiuretic hormone levels were measured using enzyme-linked immunosorbent assay.Results The plasma atrial natriuretic peptide level in postural tachycardia syndrome patients was higher than the control （P=0.004）,whereas the difference in plasma antidiuretic hormone level between postural tachycardia syndrome and controls was not significant （P=0.222）.The plasma antidiuretic hormone level of patients suffering from postural tachycardia syndrome with orthostatic hypertension was much higher than that of children having postural tachycardia syndrome without orthostatic hypertension （P ＜0.05）.In postural tachycardia syndrome patients,the updght max heart rate was positively correlated with the plasma atrial natriuretic peptide level （r=0.490,P＜0.05） and the upright systolic blood pressure was positively correlated with the plasma antidiuretic hormone levels （r=0.472,P ＜0.05）.Conclusions There was a disturbance of plasma atrial natriuretic peptide and antidiuretic hormone in postural tachycardia syndrome children.
文摘Objective： Postural tachycardia syndrome （POTS） is one of the major causes of orthostatic intolerance in children. We systematically reviewed the pathogenesis and the progress of individualized treatment for POTS in children. Data Sources： The data analyzed in this review are mainly from articles included in PubMed and EMBASE. Study Selection： The original articles and critical reviews about POTS were selected for this review. Results： Studies have shown that POTS might be related to several factors including hypovolemia, high catecholamine status, abnormal local vascular tension, and decreased skeletal muscle pump activity. In addition to exercise training, the first-line treatments mainly include oral rehydration salts, beta-adrenoreceptor blockers, and alpha-adrenoreceptor agonists. However, reports about the effectiveness of various treatments are diverse. By analyzing the patient＇s physiological indexes and biomarkers before the treatment, the efficacy of medication could be well predicted. Conclusions： The pathogenesis of POTS is multifactorial, including hypovolemia, abnormal catecholamine state, and vascular dysfunction. Biomarker-directed individualized treatment is an important strategy for the management of POTS children.
文摘Postural orthostatic tachycardia syndrome(POTS) is a relatively rare syndrome recognised since 1940. It is a heterogenous condition with orthostatic intolerance due to dysautonomia and is characterised by rise in heart rate above 30 bpm from base line or to more than 120 bpm within 5-10 min of standing with or without change in blood pressure which returns to base line on resuming supine position. This condition present with various disabling symptoms such as light headedness, near syncope, fatigue, nausea, vomiting, tremor, palpitations and mental clouding, etc. However there are no identifiable signs on clinical examination and patients are often diagnosed to have anxiety disorder. The condition predominantly affects young female between the ages of 15-50 but is rarely described in older people. We describe an older patient who developed POTS which recovered over 12 mo. Recognising this condition is important as there are treatment options available to alleviate the disabling symptoms.
文摘目的:分析体位性心动过速综合征(postural tachycardia syndrome, POTS)儿童及青少年直立试验过程中血流动力学变化及不同心脏指数(cardiac index, CI)患者血流动力学指标的差异。方法:回顾性分析26例POTS患者与12例健康对照者间直立试验过程中总外周血管阻力指数(total peripheral vascular resistance index, TPVRI)、心率和血压的变化,并比较两组间各指标变化趋势。根据每位POTS患者直立试验过程中CI变化趋势将患者分为CI降低组(14例)与CI未降低组(12例),分析两组患者在直立试验过程中CI、TPVRI、心率、血压变化,并比较两组间各指标变化趋势。结果: POTS患者在直立试验过程中CI显著下降( F =6.936, P =0.001),心率明显增快( F = 113.926 , P <0.001),收缩压明显降低( F =6.049, P <0.001),而TPVRI ( F =2.031, P =0.138)和舒张压( F =2.018, P =0.113)无明显变化。健康对照组CI在直立后显著升高( F =3.646, P =0.016),同时心率明显增快( F = 43.970, P <0.001),收缩压( F =4.043, P =0.020)和舒张压( F =8.627, P <0.001)均明显升高,TPVRI ( F = 1.688, P =0.190)无明显变化。POTS患者与健康对照组比较,CI ( F =6.221, P= 0.001)、心率( F =6.203, P < 0.001)和收缩压( F =7.946, P <0.001)随时间变化趋势显著不同,而TPVRI和舒张压在两组间的变化趋势差异无统计学意义( P >0.05)。CI降低组与CI未降低组POTS患者在直立试验中CI变化趋势差异有统计学意义( F = 14.723, P <0.001),前者直立后收缩压明显降低( F =8.010, P <0.001),而后者却无明显变化( F =0.612, P = 0.639 ), TPVRI、心率和舒张压在CI降低组与CI未降低组间随时间变化趋势差异无统计学意义( P >0.05)。年龄是POTS患者直立后CI呈下降趋势的独立影响因素( P =0.013, OR =2.233;95% CI :1.183~4.216)。结论: POTS患者在直立试验过程中存在明显的血流动力学变化,不同患者心输出量变化可能不同,年龄是心输出量下降的独立影响因素。
