# Is Blood Flow Through IPAVA and PFO Related to Breath-hold and SCUBA Diving-induced Pulmonary Hypertension?

> **NCT03945643** · EARLY_PHASE1 · COMPLETED · sponsor: **University of Oregon** · enrollment: 82 (actual)

## Conditions studied

- Patent Foramen Ovale
- Intrapulmonary Arteriovenous Anastamosis

## Interventions

- **DRUG:** Sildenafil
- **OTHER:** Placebo

## Key facts

- **NCT ID:** NCT03945643
- **Lead sponsor:** University of Oregon
- **Sponsor class:** OTHER
- **Phase:** EARLY_PHASE1
- **Study type:** INTERVENTIONAL
- **Status:** COMPLETED
- **Start date:** 2019-07-01
- **Primary completion:** 2023-01-31
- **Final completion:** 2023-07-31
- **Target enrollment:** 82 (ACTUAL)
- **Last updated:** 2023-08-14


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT03945643

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT03945643, "Is Blood Flow Through IPAVA and PFO Related to Breath-hold and SCUBA Diving-induced Pulmonary Hypertension?". Retrieved via AI Analytics 2026-06-08 from https://api.ai-analytics.org/clinical/NCT03945643. Licensed CC0.

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