deltatrials
Completed EARLY_PHASE1 INTERVENTIONAL 1-arm NCT01791816

Mechanisms of Vasovagal Syncope

Sponsor: New York Medical College

Conditions Postural Tachycardia Syndrome Vasovagal Syncope
Interventions L-Ng-monomethyl Arginine (L-NMMA) Phenylephrine
Updated 18 times since 2017 Last updated: May 20, 2025 Started: Feb 28, 2013 Primary completion: Dec 31, 2022 Completion: Dec 31, 2022
This information is for research purposes only and is not medical advice. Consult a healthcare provider before making any medical decision.

This EARLY_PHASE1 trial investigates Postural Tachycardia Syndrome and Vasovagal Syncope and is currently completed. New York Medical College leads this study, which shows 18 recorded versions since 2013 — indicating substantial longitudinal coverage. The change history captured here reflects the iterative nature of clinical trial conduct.

Status Flow

~Jan 2017 – ~Feb 2017 · 31 days · monthly snapshot~Feb 2017 – ~Apr 2018 · 14 months · monthly snapshot~Apr 2018 – ~Jun 2018 · 2 months · monthly snapshot~Jun 2018 – ~Aug 2018 · 2 months · monthly snapshot~Aug 2018 – ~Feb 2019 · 6 months · monthly snapshot~Feb 2019 – ~Aug 2019 · 6 months · monthly snapshot~Aug 2019 – ~Feb 2020 · 6 months · monthly snapshot~Feb 2020 – ~Sep 2020 · 7 months · monthly snapshot~Sep 2020 – ~Jan 2021 · 4 months · monthly snapshot~Jan 2021 – ~Mar 2021 · 59 days · monthly snapshot~Mar 2021 – ~Sep 2021 · 6 months · monthly snapshot~Sep 2021 – ~Oct 2021 · 30 days · monthly snapshot~Oct 2021 – ~May 2022 · 7 months · monthly snapshot~May 2022 – ~May 2024 · 24 months · monthly snapshot~May 2024 – ~Jul 2024 · 2 months · monthly snapshot~Jul 2024 – ~Sep 2024 · 2 months · monthly snapshot~Sep 2024 – ~Jun 2025 · 9 months · monthly snapshot~Jun 2025 – present · 15 months · monthly snapshot

Change History

18 versions recorded

  1. Jun 2025 — Present [monthly]

    Completed EARLY_PHASE1

    Status: Unknown → Completed

  2. Sep 2024 — Jun 2025 [monthly]

    Unknown EARLY_PHASE1

  3. Jul 2024 — Sep 2024 [monthly]

    Unknown EARLY_PHASE1

    Status: Unknown Status → Unknown

  4. May 2024 — Jul 2024 [monthly]

    Unknown Status EARLY_PHASE1

    Status: Active Not Recruiting → Unknown Status

  5. May 2022 — May 2024 [monthly]

    Active Not Recruiting EARLY_PHASE1

▶ Show 13 earlier versions

  1. Oct 2021 — May 2022 [monthly]

    Active Not Recruiting EARLY_PHASE1

  2. Sep 2021 — Oct 2021 [monthly]

    Active Not Recruiting EARLY_PHASE1

  3. Mar 2021 — Sep 2021 [monthly]

    Active Not Recruiting EARLY_PHASE1

  4. Jan 2021 — Mar 2021 [monthly]

    Active Not Recruiting EARLY_PHASE1

  5. Sep 2020 — Jan 2021 [monthly]

    Active Not Recruiting EARLY_PHASE1

  6. Feb 2020 — Sep 2020 [monthly]

    Active Not Recruiting EARLY_PHASE1

  7. Aug 2019 — Feb 2020 [monthly]

    Active Not Recruiting EARLY_PHASE1

  8. Feb 2019 — Aug 2019 [monthly]

    Active Not Recruiting EARLY_PHASE1

  9. Aug 2018 — Feb 2019 [monthly]

    Active Not Recruiting EARLY_PHASE1

  10. Jun 2018 — Aug 2018 [monthly]

    Active Not Recruiting EARLY_PHASE1

  11. Apr 2018 — Jun 2018 [monthly]

    Active Not Recruiting EARLY_PHASE1

    Status: Recruiting → Active Not Recruiting

  12. Feb 2017 — Apr 2018 [monthly]

    Recruiting EARLY_PHASE1

    Phase: Phase 0 → EARLY_PHASE1

  13. Jan 2017 — Feb 2017 [monthly]

    Recruiting Phase 0

    First recorded

Feb 2013

Trial started

Per CT.gov start date — pre-dates our first snapshot

Eligibility Summary

No eligibility information available.

Contact Information

Sponsor contact:
  • New York Medical College
Data source: New York Medical College

For direct contact, visit the study record on ClinicalTrials.gov .

Study Locations