# Comparison of Squat-to-Stand Maneuver With Amyl Nitrite, Valsalva, and Exercise Stress Echocardiography in Inducing Latent Left Ventricular Outflow Obstruction in Hypertrophic Cardiomyopathy

> **NCT04905173** · NA · WITHDRAWN · sponsor: **Mayo Clinic**

## Conditions studied

- Hypertrophic Cardiomyopathy
- Hypertrophic Obstructive Cardiomyopathy
- Cardiomyopathy, Hypertrophic

## Interventions

- **OTHER:** Squat-to-stand maneuver
- **DRUG:** Amyl nitrite inhalation
- **OTHER:** Valsalva

## Key facts

- **NCT ID:** NCT04905173
- **Lead sponsor:** Mayo Clinic
- **Sponsor class:** OTHER
- **Phase:** NA
- **Study type:** INTERVENTIONAL
- **Status:** WITHDRAWN
- **Start date:** 2021-11
- **Primary completion:** 2022-05
- **Final completion:** 2022-05
- **Target enrollment:** 0 (ACTUAL)
- **Why stopped:** The decision was made by study team to pursue this as a quality project instead.
- **Last updated:** 2022-01-11


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT04905173

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT04905173, "Comparison of Squat-to-Stand Maneuver With Amyl Nitrite, Valsalva, and Exercise Stress Echocardiography in Inducing Latent Left Ventricular Outflow Obstruction in Hypertrophic Cardiomyopathy". Retrieved via AI Analytics 2026-06-02 from https://api.ai-analytics.org/clinical/NCT04905173. Licensed CC0.

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