ClinicalTrials.gg
TerminatedNCT04770142Updated Apr 16, 2025

First-in-Man Early Feasibility Study for Transcatheter HOCM Septal Ablation

An interventional study of TIRA catheter in Hypertrophic Obstructive Cardiomyopathy, sponsored by Tau-MEDICAL Co., Ltd.. Terminated at 9 sites in Korea, Republic of. Open to participants aged 20 Years and older. Per ClinicalTrials.gov, last updated 2025-04-16.

Sponsored by Tau-MEDICAL Co., Ltd. · Not applicable, Interventional, and Device feasibility

Why this study was terminated
During the course of the clinical trial, sufficient subject enrollment was not achieved. As the recruitment of additional subjects was considered practically unfeasible, the clinical trial was terminated early.

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Phase
Not applicable
Study type
Interventional
Enrollment
5
Allocation
Not applicable
Ages
20 Years and older
Sex
All
01

Study summary

Transcatheter Intra-septal RF ablation system (TIRA catheter with its supplemental devices) to treat hypertrophic obstructive cardiomyopathy.

Read the detailed description

The objective of this multi-center, open label, single arm, investigator initiated exploratory pilot study is to evaluation of safety and efficacy of transcatheter Intra-septal RF ablation system (TIRA catheter with its supplemental devices), in treating hypertrophic obstructive cardiomyopathy(HOCM).

02

Conditions studied

  • Hypertrophic Obstructive Cardiomyopathy

Keywords

  • Transcatheter RF ablation
  • Intraseptal ablation
  • HOCM
  • TauPnu
03

In context

Cardiomyopathy, Hypertrophic

363 studies on the registry are indexed under Cardiomyopathy, Hypertrophic; 116 are open to participants now.

This study's enrollment of 5 is below the median of 60 across 180 interventional studies indexed under Cardiomyopathy, Hypertrophic.

Browse Cardiomyopathy, Hypertrophic studies →

Lead sponsor

Tau-MEDICAL Co., Ltd. is the lead sponsor of 7 studies on the registry; 2 are open to participants now.

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

04

Who can participate

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

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • Males and females aged 20 years or older
  • (New York Heart Association) Class Ⅱ to Ⅳ in spite of optimal medical treatment. (For optimal medical treatment, β-blocker or diuretic such as calcium antagonists should be given for at least 3 months.)
  • Patients with left ventricular effusion gradient (LVOT) greater than (1) 30 mmHg at rest or (2) at least 50 mmHg at physiological exercise/dobutamine administration/balsalva manuver. (The pressure difference due to the left ventricle drain must be the proximal mitral valve-septal contact by the systolic motion of mitral valve (SAM).)
  • Patients who voluntarily decide to participate in this clinical trial and provide written .
  • Patients who are able to understand and follow instructions and participate for the entire duration of the clinical trial.

Exclusion criteria

Exclusion Criteria:

  • Target area wall thickness ≤15mm
  • LV ≤40%
  • Subjects who have unsuitable septal vein and coronary sinus anatomy by cardiac CT or venogram
  • Conduction disturbance; LBBB or RBBB
  • Advanced AV block without permanent pacemaker
  • Subjects who have experience in performing vascular stent procedures (PCI) or CABG on coronary arteries close to the coronary sinus within 3 months.
  • Severe pulmonary HTN ≥70mmHg
  • Patients who have cardiogenic shock and those who have an expected of 12 months or less.
  • Patients with other valve diseases (companion disease) that require surgical treatment (in this case, Systolic motion of the mitral valve (SAM) caused by systolic myocardia is not considered a companion disease).
  • Patients who are pregnant, or lactating, or plan pregnacy during the clinical trials
  • Patients who are participated in other clinical trials within 1 month of enrollment
  • Patients who are deemed not to be eligible in this study by physician's discretion
Terms in these criteria, in plain language(4)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

NYHA class (heart failure)

The New York Heart Association’s four classes of how much heart failure limits physical activity.

I
No limits: ordinary activity causes no undue tiredness or breathlessness.
II
Slight limits: comfortable at rest, ordinary activity causes symptoms.
III
Marked limits: comfortable at rest, less than ordinary activity causes symptoms.
IV
Symptoms even at rest; any activity makes them worse.

Studies set their own limit — many outside heart failure leave out class III–IV, while heart failure studies may ask for a particular class. Check the class this study names.

Informed consent

Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.

You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.

LVEF (left ventricular ejection fraction)

The share of blood the heart’s main pumping chamber (the left ventricle) pushes out with each beat, measured by an echocardiogram (heart ultrasound) or a MUGA scan. About 50–70% is normal.

Life expectancy

The study doctor’s estimate of how long someone is likely to live. Criteria use it so that people can stay in the study long enough for it to answer its question.

05

Study design

Phase
Not applicable
Primary purpose
Device feasibility
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrollment
5 participants (actual)

Study arms

  • Experimental
    TIRA

    treated with transcatheter RF ablation system (TIRA catheter with its supplemental devices)

    Device: TIRA catheter

Interventions

  • DeviceTIRA catheter

    treat hypertrophic obstructive cardiomyopathy

    Also known as: CA10 and ohter 3 models

06

What researchers measure

Primary outcomes

  1. Change of LVOT obstruction

    LVOT gradient (mmHg) ; resting / valsalva maneuver with Echocardiogram

    Time frame: immediately after the procedure and 3 months

  2. Change of LVOT and Septum(1)

    LVOT diameter (mm) with Echocardiogram

    Time frame: immediately after the procedure and 3 months

  3. Change of LVOT and Septum(2)

    Intraventricular septum(IVS) thickness (mm) with Echocardiogram

    Time frame: immediately after the procedure and 3 months

  4. Morphological Structural Changes in the Lesion Area

    Intraventricular septum(IVS) thickness (mm) with cardiac CT and MRI

    Time frame: immediately after the procedure and 3 months

  5. Rate of adverse events as a measure of safety

    Adverse Events (AEs): Frequency (Number of Events) \*with particular focus on serious adverse events (SAEs) and serious adverse device effects (SADEs).

    Time frame: immediately after the procedure and 3 months

Secondary outcomes

  1. Change of LVOT obstruction

    LVOT gradient (mmHg) ; resting / valsalva maneuver with Echocardiogram

    Time frame: 6 and 12 months

  2. Change of LVOT and Septum(1)

    LVOT diameter (mm) with Echocardiogram

    Time frame: 6 and 12 months

  3. Change of LVOT and Septum(2)

    Intraventricular septum(IVS) thickness (mm) with Echocardiogram

    Time frame: 6 and 12 months

  4. Change of LVOT and Septum(3)

    Left atrial volume index (ml/m2) with Echocardiogram

    Time frame: 6 and 12 months

  5. Change of LVOT and Septum(4)

    Mitral regurgitation volume (ml) with Echocardiogram

    Time frame: 6 and 12 months

  6. Change of LVOT and Septum(5)

    Systolic anterior motion of the mitral valve (SAM) with Echocardiogram

    Time frame: 6 and 12 months

  7. Morphological Structural Changes in the Lesion Area

    Intraventricular septum(IVS) thickness (mm) with cardiac CT and MRI

    Time frame: 6 and 12 months

  8. Rate of adverse events as a measure of safety

    Adverse Events (AEs): Frequency (Number of Events) \*with particular focus on serious adverse events (SAEs) and serious adverse device effects (SADEs).

    Time frame: 6 and 12 months

07

Study locations

9 sites
  • Keimyung University Dongsan Hospital
    Daegu, Dalseo-gu 42601, Korea, Republic of
  • Hallym University Medical Center
    Anyang, Dongan-gu 14068, Korea, Republic of
  • Sejong HOSPITAL
    Bucheon-si, Gyeonggi-do 14754, Korea, Republic of
  • Pusan National University Yangsan Hospital
    Yangsan, Gyeongsangnamdo 626-770, Korea, Republic of
  • Chungnam National University Hospital (CNU Hospital)
    Daejeon, Jung-gu 35015, Korea, Republic of
  • Yeungnam University Hospital
    Daegu, Nam-gu 42415, Korea, Republic of
  • Ulsan Hospital
    Ulsan, Nam-gu 44686, Korea, Republic of
  • Chungnam National University Sejong Hospital
    Sejong, Sejong-si 30099, Korea, Republic of
  • Asan Medical Center
    Seoul, Songpa-gu 05505, Korea, Republic of
08

References and documents

Publications

  • Oh JS, Seo JY, Lee CM, Jung SJ, Kim JH, Chon MK. Trans-Coronary Sinus Intra-Septal Radiofrequency Ablation (TIRA) for Hypertrophic Obstructive Cardiomyopathy: First-in-Human Results. Biomedicines. 2024 Dec 4;12(12):2762. doi: 10.3390/biomedicines12122762. PubMed 39767669 ↗
09

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reached

Ran from Apr 2021 to primary completion in Jul 2024, 38 months.

How these figures are worked out, and which studies are left out of them.

Registered
Feb 17, 2021
First posted
Feb 25, 2021
StartActual
Apr 21, 2021
Primary completionActual
Jul 2, 2024
CompletionActual
Apr 8, 2025
Last update
Apr 16, 2025
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Apr 16, 2025, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT04770142
Lead sponsor
Tau-MEDICAL Co., Ltd.
Responsible party
Seung-Whan Lee,MD,PhD (Professor, Asan Medical Center) — Principal investigator
First posted
Feb 25, 2021
Start date
Apr 21, 2021
Primary completion
Jul 2, 2024
Completion
Apr 8, 2025
Last update
Apr 16, 2025

Study contacts

Seung-Whan Lee, MD, PhD
principal investigator · Asan Medical Center

Oversight

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

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This study is terminated, as verified in Apr 2025. You cannot join it, but the record below documents what was studied.

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