# Mechanisms of Vasovagal Syncope

> **NCT01791816** · EARLY_PHASE1 · COMPLETED · sponsor: **New York Medical College** · enrollment: 90 (estimated)

## Conditions studied

- Vasovagal Syncope
- Postural Tachycardia Syndrome

## Interventions

- **DRUG:** Phenylephrine
- **DRUG:** L-Ng-monomethyl Arginine (L-NMMA)

## Key facts

- **NCT ID:** NCT01791816
- **Lead sponsor:** New York Medical College
- **Sponsor class:** OTHER
- **Phase:** EARLY_PHASE1
- **Study type:** INTERVENTIONAL
- **Status:** COMPLETED
- **Start date:** 2013-02
- **Primary completion:** 2022-12
- **Final completion:** 2022-12
- **Target enrollment:** 90 (ESTIMATED)
- **Last updated:** 2025-05-23


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT01791816

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT01791816, "Mechanisms of Vasovagal Syncope". Retrieved via AI Analytics 2026-06-25 from https://api.ai-analytics.org/clinical/NCT01791816. Licensed CC0.

---

*[Clinical trials dataset](/datasets/clinical-trials) · CC0 1.0*