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To evaluate differences in recently developed, non-standard adrenergic baroreflex sensitivity (BRS) indices between patients with postural tachycardia syndrome (PoTS) and healthy controls (HC).Criteria for diagnosing PoTS were increment of heart rate (HR) ⩾30bpm or raise of HR to ⩾120bpm in the absence of orthostatic hypotension, and a history of orthostatic intolerance symptoms lasting at least 3months...
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