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Nerve block injection may tame deadly heart storms

NCT ID NCT07211347

Disease control Sponsor: University of Sao Paulo General Hospital Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study tests a procedure called a stellate ganglion block, where a numbing medicine is injected near nerves in the neck to calm severe, repeated episodes of dangerous heart rhythms (electrical storm). The trial will involve 64 adults with heart disease who have not responded to standard treatments. Half will receive the injection, and the other half will not, to see if it reduces life-threatening heart events by at least 50% within 12 hours.

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 (lidocaine and bupivacaine injection)
What this could lead to
If it works, this could provide a new, less invasive way to control life-threatening heart rhythm emergencies when standard treatments fail.
What could go wrong
This is a small, early-phase trial with only 64 participants, so results may not apply to everyone. The procedure carries risks like bleeding or nerve damage, and it may not reduce arrhythmias as hoped.

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

Phase 4

Runs after approval, following long-term safety and how well the treatment works in everyday use.

Participants

About 64 people

The number the study aims to enrol. It can still change while the study runs.

Started

Jun 2025

Expected to finish

Dec 2028

An estimate. End dates often move.

Lead sponsor

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

18 years and older

Sex

Anyone

Healthy volunteers

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

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Patients over 18 years old with structural heart disease and a diagnosis of refractory electrical storm, or those who require discontinuation of antiarrhythmics due to adverse events or contraindications to standard therapy. Exclusion Criteria: * Patients under 18 * History of heart transplant or prior cardiac denervation surgery * Anatomical contraindications for the procedure (prior neck surgery, burns, large scars, or thyroid goiter). * Genetically related polymorphic VT * End-stage renal disease on dialysis

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As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Electrical storm Stellate ganglion block Ventricular arrhythmia

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    1 site. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. 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

  • Clinical Research Center of the Heart Institute - University of São Paulo

    RECRUITING

    São Paulo, São Paulo, 05409011, Brazil

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