Iron Sucrose in Adolescents With Iron Deficiency and Postural Orthostatic Tachycardia Syndrome (POTS)

Phase 1

Terminated

Conditions: Postural Orthostatic Tachycardia Syndrome

Interventions: Drug: Normal saline infusion
Drug: Iron infusion

Registration Number: NCT01978535

Lead Sponsor: Mayo Clinic

Brief Summary: This study is designed to investigate whether the treatment of non-anemic iron deficiency with intervenous iron sucrose will result in decreased symptom reporting and improved cardiovascular indices in adolescents (age 12-21) with Postural Orthostatic Tachycardia Syndrome (POTS).

Detailed Description: Postural orthostatic tachycardia syndrome (POTS) is characterized by an exaggerated heart rate response to the standing position in a patient with symptoms of orthostatic intolerance. It is likely a heterogeneous disorder representing a common manifestation of a number of possible underlying derangements such as impaired sympathetically mediated vasoconstriction, excessive sympathetic drive, volume dysregulation and deconditioning. While the actual prevalence of POTS is unknown, it has been estimated to affect at least 500,000 individuals in the United States. It predominately affects young individuals, and particularly women.

The prevalence of iron deficiency in adolescents with POTS has been reported to be greater than that expected in the general adolescent population. The use of intravenous iron sucrose has been shown to be a safe and effective therapy for correcting iron deficiency in children and adolescents. Anecdotal experience at our clinic has demonstrated an immediate reduction in self-reported orthostatic symptoms in several patients diagnosed with POTS following the administration of intravenous iron sucrose for iron deficiency.

This study is a randomized, double blind, placebo-controlled study to assess the efficacy of a single iron sucrose infusion in adolescents with non-anemic iron deficiency and POTS. Subjects will be screened at outpatient clinic visit appointments. Interested qualified subjects will be consented and offered participation in this trial. Once consent and assent (for patients less than 18 years of age) has been obtained, subjects will be randomized to either treatment or placebo group. Subjects will participate in two on site study visits. During the first visit subjects will complete baseline laboratory studies, tilt table test and study questionnaires. Subjects will then receive the intervention study drug or placebo. The second study visit will occur 7 days + 2 days from the first study visit. During the second study visit subjects will repeat laboratory studies, tilt table test and study questionnaires. Follow up questionnaires will be sent to all subjects six months following the initial study visit.

Recruitment & Eligibility

Status: TERMINATED

Sex: All

Target Recruitment: 3

Inclusion Criteria

Not provided

Exclusion Criteria

Not provided

Study & Design

Study Type: INTERVENTIONAL

Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Normal saline infusion	Normal saline infusion	Equal volume to intervention of normal saline
Iron infusion	Iron infusion	Iron Sucrose (Venofer (R))

Primary Outcome Measures

Name	Time	Method
Cardiovascular Indices-interval Change in Heart Rate During 10-minute Head up Tilt Table Test	7 (+/- 2) days following intervention	This study will assess whether a single infusion of iron sucrose will improve cardiovascular indices, specifically a reduction in the interval of measured heart rate change, during a ten minute head up tilt, in adolescent subjects with POTS and non-anemic iron deficiency

Secondary Outcome Measures