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Active, Not Recruiting

NCT Number: NCT06277960

Septal Ablation for Obstructive HCM

Hypertrophic cardiomyopathy (HCM) is a common clinical genetic-related disease, with a global incidence of 0.2%-0.5%, but only a few cases (10-20%) have been clinically diagnosed. About 70% of them are hypertrophic obstructive cardiomyopathy (HOCM), these HOCM patients have significant clinical symptoms, including progressively increasing fatigue, angina, exertional dyspnea, and syncope. Conservative medications are used to treat the vast majority of patients. Invasive therapy, which includes surgical myectomy, percutaneous transluminal septal myocardial ablation(PTSMA), percutaneous intramyocardial septal radiofrequency ablation (PIMSRA) and percutaneous endocardial septal radiofrequency ablation (PESA) is introduced to patients with refractory symptoms or drug resistance. However, surgical operations are complicated and high risk procedures with high mortality. Interventional approaches are very difficult to perform and therefore the application is limited.

Previous researches have shown that interventricular septal radiofrequency ablation could effectively reduce the left ventricular outflow tract pressure gradient (LVOTG), thereby treating obstructive hypertrophic cardiomyopathy (HOCM). This device is based on the same radiofrequency ablation energy principle, however, the catheter is introduced into the right ventricle and performs ablation treatment on the hypertrophic interventricular septum, which is potentially a lower risk route of access for septal ablation than currently attempted interventional approaches.

The purpose of this study is to evaluate the safety and efficacy of percutaneous intramyocardial septal ablation catheters in the treatment of obstructive hypertrophic cardiomyopathy.

Active, Not Recruiting

This study is active but is not currently recruiting participants.

Key information

Conditions

Hypertrophic Obstructive Cardiomyopathy (HOCM) Aortic Stenosis, Subvalvular Aortic Valve Disease Aortic Valve Stenosis Cardiomyopathies Cardiomyopathy, Hypertrophic Cardiovascular Diseases Heart Diseases Heart Valve Diseases

Age range

18 year–75 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

Sir Run Run Shaw Hospital

Hangzhou, Zhejiang, 310016, China

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • 18 years old ≤ age ≤ 75 years old, no gender limit.
  • Subject has pressure gradient of left ventricular outflow tract (LVOT) ≥50 mmHg（with Systolic Anterior Motion）in the resting-state or after exercise stress test.
  • Subject with New York Heart Association (NYHA) cardiac function ≥ II grade.
  • Subject with adequate drug treatment is not effective or cannot tolerate side effects of the drug.
  • Subject was informed of the nature of the clinical study and agreed to participate in all the requirements of the clinical study, signed an ethics committee-approved informed consent form before conducting any special examinations and/or treatments related to the clinical study.

Exclusion criteria

  • Subject is pregnant, lactating, or planned to conceive during a clinical study.
  • Subject with interventricular septal thickness ≥ 30mm.
  • Subject has undergone other ventricular septal volume reduction surgeries.
  • Subject with complete right bundle branch block on electrocardiogram.
  • Subject with Sudden Cardiac Death Index ≥ 10%.
  • Subject combined with other heart diseases requires surgical treatment.
  • Subject with heart failure(Defined as resting heart failure after intensive anti-heart failure therapy, left ventricular fraction of ejecting< 40%).
  • Subject is mentally incapacitated or unable to understand the study requirements.
  • Subject has participated in other clinical trials within 3 months.
  • The investigator determines that there is any situation that affects the safety of the subjects or interferes with the evaluation of test results.

Treatment and study plan

percutaneous intramyocardial septal radiofrequency ablation system

Device

The device is introduced into the right ventricle and performs ablation treatment on the hypertrophic interventricular septum.

Primary outcomes

  1. 30-day major adverse clinical events (MACE)

    Time frame: 30-day

    30-day major adverse clinical events (MACE), including death, emergency surgery, severe pericardial effusion bleeding requiring pericardiocentesis or surgery, atrioventricular block, heart perforation, and surgery-related stroke.

Secondary outcomes

  1. Technical success rate

    Time frame: 30-day

    Technical success rate: the radiofrequency ablation catheter reaches the required treatment site, successfully completes the ablation, and is successfully withdrawn from the body.

  2. Short Form 36 (SF-36) health survey questionnaire

    Time frame: 90-day

    The life quality score of SF-36 would significantly improved after the procedure. The higher scores mean a better outcome.

  3. Improvement of left ventricular outflow tract gradient (LVOTG)

    Time frame: 6 months

    The improvement of LVOTG at post-procedure,30 days,3 months and 6 months after procedure. If the pressure gradient is reduced, the symptom will improve.

  4. Improvement of NYHA functional classification

    Time frame: 6 months

    The improvement of NYHA functional class at post-procedure,30 days,3 months and 6 months after procedure. The lower class mean a better outcome.

  5. 6-min walk distance

    Time frame: 6 months

    The increase of 6-min walk distance at post-procedure,30 days,3 months and 6 months after procedure.

Sponsors and collaborators

Lead sponsor

SuZhou Sinus Medical Technologies Co.,Ltd

Industry

Registry information

Official study title

A Prospective, Single-center, Single-arm Clinical Study to Evaluate the Safety and Effectiveness of Percutaneous Intramyocardial Septal Radiofrequency Ablation System in the Treatment of Hypertrophic Obstructive Cardiomyopathy

Important dates

Study start
2024
Primary completion
2025
Study completion
2026
First posted
Feb 26, 2024
Registry last updated
May 30, 2025

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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