Clinical trial No longer in our active list Interventional Ages 18 to 75

Hybrid ablation procedure for inappropriate sinus tachycardia

Official title: Hybrid Epicardial and Endocardial Sinus Node Sparing Ablation Therapy for Inappropriate Sinus Tachycardia

Run by AtriCure, Inc. · NCT05280093 · Data updated 2026-05-14

This study is no longer in our active list. It may have stopped recruiting or finished. The details below are as of 2026-05-14 and are kept for reference. Check ClinicalTrials.gov for its current status, or see similar studies below.

This study is testing a new procedure to see if it can help younger people with inappropriate sinus tachycardia who haven't found relief from medications.

Quick facts

Study typeInterventional
Ages18 Years to 75 Years
SexAll
Enrollment142 (estimated)
SponsorAtriCure, Inc.
Industry-sponsored
Locations26 sites (Loma Linda, California and 25 other locations)
Trial IDNCT05280093 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates are adults aged 18 to 75 with a confirmed diagnosis of IST who have not responded to or cannot tolerate standard drug therapies.

Probably not a fit

Patients with existing cardiac devices, significant heart failure, or other specified cardiac conditions may not benefit from this study.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This clinical trial evaluates the safety and effectiveness of a hybrid sinus node sparing ablation procedure for patients suffering from inappropriate sinus tachycardia (IST) who are intolerant or refractory to drug treatments. The study aims to provide a systematic clinical approach to a condition that significantly impacts the quality of life of otherwise healthy younger individuals. Participants will undergo the AtriCure ISOLATOR Synergy Surgical Ablation System intervention to assess its efficacy in alleviating symptoms associated with IST.

Why it matters

Potential benefit: If successful, this procedure could offer a new treatment option for patients with drug-resistant inappropriate sinus tachycardia, improving their quality of life.

How similar studies have gone: While there is limited systematic clinical evidence for IST treatments, similar ablation approaches have shown promise in other tachycardia conditions, suggesting potential for success in this novel application.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

1. Age ≥ 18 years and ≤ 75 years at time of enrollment consent
2. Subject has a diagnosis of IST
3. Documentation of refractoriness (intolerance or failure) of a drug (e.g., rate control drugs such as beta-blockers/calcium channel blockers, ivabradine), and/or AADs
4. Subject is willing and able to provide written informed consent

Exclusion Criteria:

1. Subjects on whom cardiac surgery or single lung ventilation cannot be performed
2. Subjects with indication for or existing ICDs/Pacemakers
3. Presence of channelopathies
4. Previous cardio-thoracic surgery
5. Left Ventricular Ejection Fraction (LVEF) \< 50%
6. Body Mass Index (BMI) ≥ 35
7. Presence of supraventricular or ventricular tachycardia
8. Presence of Postural Orthostatic Sinus Tachycardia (POTS)
9. Presence of congenital heart disease
10. History suggestive of secondary cause of tachycardia such as pheochromocytoma, anemia, thyrotoxicosis, chronic fever of unknown origin, COPD, long-term bronchodilators use, severe asthma or carcinoid syndrome
11. Subjects who have had a previous catheter ablation in the right atrium for IST or other disorders
12. Life expectancy \< 24 months
13. Pregnant or planning to become pregnant during trial
14. Subjects with substance abuse
15. Subjects with previous weight loss surgery
16. Subject is unwilling and/or unable to return for scheduled follow-up visits
17. Current participation in another clinical investigation of a medical device or a drug, or recent participation in such a trial that may interfere with trial results
18. Not competent to legally represent him or herself (e.g., requires a guardian or caretaker as a legal representative) and;
19. Presence of other anatomic or comorbid conditions, or other medical, social, or psychological conditions that, in the investigator's opinion, could limit the subject's ability to participate in the clinical investigation or to comply with follow-up requirements, or impact the scientific soundness of the clinical investigation results

Where it's running

  • Loma Linda University Health
    Loma Linda, California, United States
    Recruiting
  • Sequoia Hospital
    Redwood City, California, United States
    Recruiting
  • Stanford University
    Redwood City, California, United States
    Recruiting
  • Saint Vincent's Medical Center
    Bridgeport, Connecticut, United States
    Recruiting
  • Medstar Washington Hospital Center
    Washington, District of Columbia, United States
    Recruiting
  • University of Florida
    Gainesville, Florida, United States
    Recruiting
Show 20 more locations
  • Sarasota Memorial Hospital
    Sarasota, Florida, United States
    Recruiting
  • St. Joseph's Hospital / Baycare Health System
    Tampa, Florida, United States
    Recruiting
  • Memorial Health University Medical Center
    Savannah, Georgia, United States
    Recruiting
  • Kansas City Cardiac Arrhythmia Research LLC
    Overland Park, Kansas, United States
    Recruiting
  • Mayo Clinic
    Rochester, Minnesota, United States
    Recruiting
  • Wake Forest University Health Sciences
    Winston-Salem, North Carolina, United States
    Recruiting
  • TriHealth, Inc.
    Cincinnati, Ohio, United States
    Recruiting
  • The Christ Hospital
    Cincinnati, Ohio, United States
    Recruiting
  • Texas Cardiac Arrhythmia Research Foundation
    Austin, Texas, United States
    Recruiting
  • Intermountain Healthcare
    Salt Lake City, Utah, United States
    Recruiting
  • Virginia Commonwealth University
    Richmond, Virginia, United States
    Recruiting
  • Swedish Medical Center
    Seattle, Washington, United States
    Recruiting
  • UZ Brussels
    Brussels, Belgium
    Recruiting
  • San Raffaele Hospital
    Milan, Italy
    Recruiting
  • Amsterdam University Medical Center
    Amsterdam, Netherlands
    Recruiting
  • Maastricht University Medical Center
    Maastricht, Netherlands
    Recruiting
  • Central Clinic Hospital
    Warsaw, Poland
    Recruiting
  • Northern General Hospital
    Sheffield, United Kingdom
    Recruiting
  • Baptist Health
    Miami, Florida, United States
    Withdrawn
  • Saint Alphonsus Regional Medical Center
    Boise, Idaho, United States
    Withdrawn

Study contacts

  • Principal investigator: Dhanunjaya Lakkireddy, MD — Kansas City Heart Rhythm Institute
  • Study coordinator: Joseph Derr
  • Email: jderr@atricure.com
  • Phone: 1 (866) 349-2342

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
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Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.