Nerve block may unlock secrets of dangerous heart rhythm
NCT ID NCT05377216
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study looks at how a nerve block (stellate ganglion block) changes the heart's electrical activity in 20 people with ventricular tachycardia, a fast and potentially dangerous heart rhythm. Researchers will measure how the heart's refractory period changes and whether the nerve block affects the ability to trigger the arrhythmia. The goal is to better understand the role of the nervous system in this condition.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- stellate ganglion block (local anesthetic)
- What this could lead to
- If successful, this could point toward a new way to control dangerous heart rhythms by targeting nerve signals.
- What could go wrong
- This is a very small, early-phase study focused on measuring effects, not treating the condition. It may not lead to a practical therapy.
This is an AI summary of the original study and may miss details. Read our disclaimer.
Study facts
What this study's own registry entry says, in plain language.
- Phase
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Early phase 1
The earliest testing in people: a first look at safety, in a very small group.
- Participants
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About 20 people
The number the study aims to enrol. It can still change while the study runs.
- Started
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Sep 2022
- Expected to finish
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Jul 2027
An estimate. End dates often move.
- Lead sponsor
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Other sponsor
The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
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18 years and older
- Sex
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Anyone
- Healthy volunteers
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Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
Show the full entry requirements Hide the full entry requirements
Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: * Planned catheter based VT ablation * Age at least 18 years Exclusion Criteria: * Pregnancy * Contraindication to SGB or VT ablation * Hypersensitivity of local anesthetic of amide type * Hemodynamic instability during the procedure prior to the study protocol
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
How to take part
Only the study team decides who joins. These are the ways to reach them.
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The places running it
1 site. The list below names each one and where it is.
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The official record
ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.
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A doctor treating you
A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.
Contacts and locations
Locations
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Hospital of the University of Pennsylvania
RECRUITINGPhiladelphia, Pennsylvania, 19104, United States
More trials for these conditions
Other studies related to the condition(s) this trial covers.
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- Can a higher dose of heart radiation stop dangerous rhythms?
- Can two advanced heart maps guide a more precise fix for dangerous arrhythmias?
- Could a short course of steroids calm a dangerous heart rhythm?
- CT scan roadmap may improve heart ablation success
- 4,000 heart patients to be tracked after ablation procedure