Among adolescents with fatigue and postural dizziness, it is unclear how health behaviors and emotional distress relate to the presence of excessive postural tachycardia. We prospectively evaluated adolescents aged 13-22 years presenting with symptoms suggestive of autonomic dysfunction between September 2017 and December 2018. Patients underwent standard 10-minute, 70-degree head-up tilt testing. Clinician diagnoses and recommendations were recorded from the medical record. Patients completed validated self-report measures of lifestyle factors, autonomic symptoms, depression, anxiety, and functional disability. Of 179 patients, 58 were diagnosed with postural orthostatic tachycardia syndrome and 59 had excessive postural tachycardia, with 90.5% concordance between the 2 groups. Presence of excessive postural tachycardia was associated with greater baseline fluid intake and likelihood of medication prescription in their treatment plan. Medication findings were replicated for postural orthostatic tachycardia syndrome diagnosis. Presence of excessive postural tachycardia or postural orthostatic tachycardia syndrome did not differentiate patients on perceived symptom severity, emotional distress, disability, or health behaviors but did appear to determine treatment recommendations.

中文翻译：

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青少年过度体位性心动过速和体位性心动过速综合征：与痛苦、损伤、健康行为和药物推荐的关联

在患有疲劳和姿势性头晕的青少年中，尚不清楚健康行为和情绪困扰与过度姿势性心动过速的存在有何关系。我们前瞻性地评估了 2017 年 9 月至 2018 年 12 月期间出现自主神经功能障碍症状的 13-22 岁青少年。患者接受了标准的 10 分钟、70 度抬头倾斜测试。从医疗记录中记录临床医生的诊断和建议。患者完成了经过验证的生活方式因素、自主神经症状、抑郁、焦虑和功能障碍的自我报告测量。179例患者中，58例被诊断为体位性心动过速综合征，59例为过度体位性心动过速，两组一致率为90.5%。过度体位性心动过速的存在与更多的基线液体摄入量和治疗计划中药物处方的可能性有关。重复用药结果用于体位性体位性心动过速综合征的诊断。过度体位性心动过速或体位性体位性心动过速综合征的存在并不能区分患者的感知症状严重程度、情绪困扰、残疾或健康行为，但似乎确实决定了治疗建议。