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Status unknownNCT05078684GANGSTERUpdated Oct 19, 2021

GANGlion Stellate Block for Treatment of Electric storRm (GANGSTER Trial)

A Phase 3 interventional study of Left ganglion stellate block and Sham left ganglion stellate block in Ventricular Arrythmia, Ventricular Tachycardia and Ventricular Fibrillation, sponsored by Institute for Clinical and Experimental Medicine. Status unknown at 1 site in Czechia. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2021-10-19.

Sponsored by Institute for Clinical and Experimental Medicine · Phase 3, Interventional, and Treatment

The sponsor has not verified this record recently (last verified Oct 2021), so the status shown — last known as Recruiting — may be out of date.
Phase
Phase 3
Study type
Interventional
Enrollment
80
Allocation
Randomized
Ages
18 Years and older
Sex
All
01

Study summary

This study will evaluate the acute effect of ultrasound-navigated left ganglion stellate block to suppress ventricular arrhythmia in patients with arrhythmic storm.

Read the detailed description
  • The study will include patients with drug-refractory arrhythmic storm indicated for left ganglion stellate block (LGSB) before or after catheter ablation.
  • Included participants will be dived based on the need for mechanical ventilation and catheter ablation performed \<5 days before the study
  • Subsequently, the participants will be randomized to LGSB or to a sham (placebo) procedure.
  • The primary endpoint will be a reduction of the burden of clinical arrhythmia >50% 24 hours after LGSB without escalation of antiarrhythmic therapy.
  • The study will include 80 patients over 4 years.
02

Conditions studied

  • Ventricular Arrythmia
  • Ventricular Tachycardia
  • Ventricular Fibrillation
  • Arrhythmic Storm
  • Block
03

In context

Tachycardia

623 studies on the registry are indexed under Tachycardia; 81 are open to participants now.

This study's planned enrollment of 80 is above the median of 64 across 379 interventional studies indexed under Tachycardia.

Browse Tachycardia studies →

Lead sponsor

Institute for Clinical and Experimental Medicine is the lead sponsor of 60 studies on the registry; 20 are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

Inclusion criteria

  1. arrhythmic storm \<24 hours before inclusion:

    • 3 or more episodes of sustained ventricular tachycardia (VT) or ventricular fibrillation (VF) terminated by external or internal shock,
    • or incessant VT lasting >30 minutes,
    • or very frequent nonsustained or sustained VT leading to hemodynamic instability with the need of escalation of the therapy
  2. clinical indication for LBGS based on the judgment of the physician, independent of the study

Exclusion criteria

Exclusion Criteria:

  1. known allergy to bupivacaine
  2. prior LBGS performed \<7 days before the study
  3. known reversible provoking trigger of the arrhythmias
  4. ventricular arrhythmias triggered by premature ectopic beats during bradycardia
  5. hemodynamically tolerated idiopathic VT in patients without structural heart disease
05

Study design

Phase
Phase 3
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Triple (Participant, Care provider, Outcomes assessor)
Enrollment
80 participants (estimated)

Study arms

  • Active comparator
    Actual LGSB

    The patients will receive an actual LGSB procedure: Using ultrasound navigation and an echo-contrast needle, 8ml of bupivacain (5%) will be applied to the site of the left ganglion stellate through an anterolateral approach in the neck region.

    Procedure: Left ganglion stellate block

  • Sham comparator
    Sham procedure

    The procedure will be performed using the same instruments and anesthetic drug as the actual LGSB. However, the operator will apply only 0.5-1ml of the anesthetic drug and only subcutaneously to the site where an actual LGSB would be performed.

    Procedure: Sham left ganglion stellate block

Interventions

  • ProcedureLeft ganglion stellate block

    Ultrasound-guided anesthetic block of left ganglion stellate using 8ml of 5% bupivacaine.

  • ProcedureSham left ganglion stellate block

    Subcutaneous application of 0.5-1ml of 5% bupivacaine to the site of expected LGSB

06

What researchers measure

Primary outcomes

  1. Change in the number of episodes of sustained VT/VF

    Change by \>50% of the number of episodes of sustained ventricular tachycardia/fibrillation compared to 24 hours before LGSB, without escalation of antiarrhythmic therapy during 24 hours after LGSB (deep sedation requiring mechanical ventilation, addition of another antiarrhythmic drug, implantation of mechanical circulatory support, unplanned emergent catheter ablation)

    Time frame: 2-24 hours after LGSB. The first 2 hours after the LGSB will not be considered in the evaluation (i.e., blanking period)

  2. Change in arrhythmia burden quantified by Holter ECG

    Change of the percent of QRS complexes with ventricular tachycardia by \>50% on Holter ECG, as compared to 24 hours before LGSB, without escalation of antiarrhythmic therapy during 24 hours after LGSB (deep sedation requiring mechanical ventilation, addition of another antiarrhythmic drug, implantation of mechanical circulatory support, unplanned emergent catheter ablation).

    Time frame: 2-24 hours after LGSB. The first 2 hours after the LGSB will not be considered in the evaluation (i.e., blanking period)

07

Study locations

1 of 1 sites recruiting
  • Institute for Clinical and Experimental Medicine (IKEM)
    Prague, 14059, Czechia
    Recruiting
08

References and documents

Individual participant data

Plan to share: Undecided

No publications or documents are linked to this record.

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Oct 19, 2021, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT05078684
Lead sponsor
Institute for Clinical and Experimental Medicine
Responsible party
Marek Sramko, MD, PhD (Head of the Department of Acute Cardiology, Institute for Clinical and Experimental Medicine) — Principal investigator
First posted
Oct 14, 2021
Start date
Aug 21, 2021
Primary completion
Dec 31, 2024 (estimated)
Completion
Jan 31, 2025 (estimated)
Last update
Oct 19, 2021

Study contacts

Marek Sramko, MD, PhD
Contact
marek.sramko@ikem.cz
+420776246127

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is status unknown, as verified in Oct 2021. You cannot join it, but the record below documents what was studied.

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