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RECRUITING

NCT07468383

Basic and Clinical Study of Cardiac Ganglion Catheter Ablation for the Treatment of Significant Bradycardia

Sponsor: Beijing Anzhen Hospital

View on ClinicalTrials.gov

Summary

This study adopts a strategy combining basic research with clinical investigation to systematically explore the therapeutic value of cardioneuroablation in the treatment of vagally-mediated bradycardia. The study design fully considers the complexity of the scientific question and the feasibility of clinical translation. Through rigorous experimental design and standardized operational procedures, the reliability and reproducibility of the study results are ensured.

Key Details

Gender

All

Age Range

18 Years - 65 Years

Study Type

INTERVENTIONAL

Enrollment

188

Start Date

2025-08-01

Completion Date

2028-07-31

Last Updated

2026-03-13

Healthy Volunteers

Conditions

Symptomatic Bradycardia Autonomic Nervous System Diseases

Interventions

PROCEDURE

Cardioneuroablation

The procedure is performed under local anesthesia with conventional sedation using 1-3 mg of midazolam. The decision to administer additional sedation is assessed based on the patient's level of consciousness. The femoral vein is punctured, and a sheath is placed. Through this femoral venous sheath, catheters are advanced via the right atrium to position electrodes in the coronary sinus and the right ventricle. Under the guidance of intracardiac echocardiography and fluoroscopy (X-ray), a transseptal puncture is performed. The ablation catheter is then introduced into the left atrium through the transseptal sheath to sequentially perform catheter ablation of the left atrial and, selectively, the right atrial ganglionated plexi.

PROCEDURE

Sham Control

Throughout the procedure, the patient continuously wears over-ear headphones playing music and an eye mask. The surgery is performed under local anesthesia with conventional sedation using 1-3 mg of midazolam. The decision to administer additional sedation is assessed based on the patient's level of consciousness. Preoperative preparation, femoral vein puncture, placement of electrode catheters, and the electrophysiological study protocol are the same as in the intervention group; however, no transseptal puncture, ganglion mapping, or catheter ablation is performed.

Inclusion Criteria: 1. Age range: 18 - 65 years old 2. Have symptoms related to bradycardia (syncope, dizziness, blackout, palpitations, fatigue, listlessness, inability to concentrate and decreased activity endurance, etc.) 3. Meet one of the following conditions: ①Dynamic electrocardiogram shows an average heart rate of less than 50 beats per minute or there is a heart arrest lasting more than 3 seconds during the day; ②Transient second or third degree atrioventricular conduction block without hemodynamic disorders during the day 4. The atropine test showed that the sinus heart rate increased by ≥ 25%, or the heart rate was ≥ 90 beats per minute, or the atrioventricular conduction block was significantly improved to be no more than first-degree atrioventricular conduction block. Exclusion Criteria: 1. A history of severe trauma caused by bradycardia 2. Regular use of antiarrhythmic drugs within the past 3 months 3. Prior implantation of a cardiac pacemaker 4. Existing implantation of, or indication for implantation of, electronic devices with pacing function, such as cardiac contractility modulators (CCMs), implantable cardioverter-defibrillators (ICDs), or cardiac resynchronization therapy (CRT) devices 5. Bradycardia or atrioventricular block caused by medications or other reversible factors (e.g., hyperkalemia, hypothyroidism) 6. Bradycardia or atrioventricular block associated with obstructive sleep apnea syndrome (OSAS) 7. Coronary revascularization within the past 3 months, or unstable coronary heart disease despite standardized medical treatment or revascularization 8. Stroke or transient ischemic attack (TIA) within the past 3 months 9. A history of open-heart surgery 10. Severe congenital heart disease 11. Complicated with severe ventricular arrhythmia 12. Severe cardiac insufficiency with left ventricular ejection fraction (LVEF) ≤ 35% 13. Severe cardiomyopathy, such as hypertrophic obstructive cardiomyopathy (HOCM), dilated cardiomyopathy (DCM), or cardiac amyloidosis 14. Severe aortic or mitral valve stenosis 15. Pregnancy or lactation period 16. Expected survival time of less than 1 year 17. Refusal to sign the informed consent form 18. Other conditions deemed ineligible by the researchers

Locations (1)

Beijing Anzhen Hospital, Capital Medical University

Beijing, China, China