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Obstructive Hypertrophic CardiomyopathyNCT06856265

Efficacy of Mavacamten Combined With Radiofrequency Ablation in Patients With Symptomatic Obstructive Hypertrophic Cardiomyopathy

A study testing radiofrequency ablation and Mavacamten in people with Obstructive Hypertrophic Cardiomyopathy and Mavacamten, run by Shanghai Chest Hospital.

Not yet recruiting

Opening soon. The study is approved but enrolment has not started yet. Sites may already take enquiries.

Sites and contacts
Official record
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Trial summary

This study aims to evaluate the efficacy and safety of Mavacamten combined with radiofrequency ablation compared to Mavacamten alone in patients with symptomatic obstructive hypertrophic cardiomyopathy (HOCM). Participants were randomized into two groups: Read more about this study

Who is it for?
Ages 18 years and older
What is being tested?
radiofrequency ablation and Mavacamten
Could I receive a placebo?
No, everyone receives an active treatment
How many people
40 participants
Where
No sites listed yet
Study dates
26 Feb 2025to 1 Dec 2025
Phase
Interventional
Are there results?
Not yet: the study is under way

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 years and older
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • At least 18 years old at screening.
  • Body weight was greater than 45 kg at screening.
  • Diagnosed with obstructive hypertrophic cardiomyopathy (oHCM) consistent with current American College of Cardiology Foundation/American Heart Association, European Society of Cardiology, and Chinese Society of Cardiology guidelines, ie, satisfy criteria below (criteria to be documented by the echocardiography core laboratory): A. Had unexplained left ventricular (LV) hypertrophy with nondilated ventricular chambers in the absence of other cardiac (eg, hypertension, aortic stenosis) or systemic disease and with maximal LV wall thickness ≥15 mm (or ≥13 mm with positive family history of hypertrophic cardiomyopathy), as determined by core laboratory interpretation, and B. Had left ventricular outflow tract (LVOT) peak gradient ≥50 mm Hg during screening as assessed by echocardiography at rest or after Valsalva maneuver (confirmed by echocardiography core laboratory interpretation).
  • Had documented LV ejection fraction (LVEF) ≥55% by echocardiography core laboratory read of screening TTE at rest.
  • Had a valid measurement of Valsalva LVOT peak gradient at screening as determined by echocardiography core laboratory.
  • Had New York Heart Association (NYHA) class II or III symptoms at screening.
  • Had documented oxygen saturation at rest ≥90% at screening.
  • Study participants were able to understand and comply with the study procedures, understand the risks involved in the study, and provided written informed consent according to national, local, and institutional guidelines before the first study-specific procedure.

Who cannot join

  • 1) Participated in a clinical trial in which the participant received any investigational drug (or was currently using an investigational device) within 30 days prior to screening, or at least 5 times the respective elimination half-life (if known), whichever was longer.
  • 2) Known infiltrative or storage disorder causing cardiac hypertrophy that mimics oHCM, such as Fabry disease, amyloidosis, or Noonan syndrome with LV hypertrophy. 3) Had a history of syncope within 6 months prior to screening or sustained ventricular tachyarrhythmia with exercise within 6 months prior to screening.
  • 4) Had a history of resuscitated sudden cardiac arrest (at any time) or known history of appropriate implantable cardioverter-defibrillator (ICD) discharge for life-threatening ventricular arrhythmia within 6 months prior to screening.
  • 5) Had paroxysmal, intermittent atrial fibrillation with atrial fibrillation present per the investigator's evaluation of the participant's electrocardiogram (ECG) at the time of screening.
  • 6) Had persistent or permanent atrial fibrillation not on anticoagulation for at least 4 weeks prior to screening and/or not adequately rate-controlled within 6 months prior to screening (note: participants with persistent or permanent atrial fibrillation who were anticoagulated and adequately rate-controlled were allowed).
  • 7) Previously participated in a clinical study with mavacamten. 8) Hypersensitivity to any of the components of the mavacamten formulation. 9) Current treatment (within 14 days prior to screening) or planned treatment during the study with disopyramide, cibenzoline, or ranolazine. 10) Current treatment (within 14 days prior to screening) or planned treatment during the double blinded treatment with a combination of beta-blockers and verapamil or a combination of beta blockers and diltiazem.
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  • 11) For individuals on beta-blockers, verapamil, or diltiazem, any dose adjustment of that medication within14 days prior to screening or any anticipated change in treatment regimen using these medications during the treatment.
  • 12) Had been successfully treated with invasive septal reduction (surgical myectomy or percutaneous alcohol septal ablation [ASA]) within 6 months prior to screening or planned to have either of these treatments during the study (note: individuals with an unsuccessful myectomy or percutaneous ASA procedure performed >6 months prior to screening were enrolled if study eligibility criteria for LVOT gradient criteria were met).
  • 13) ICD placement within 2 months prior to screening or planned ICD placement during the study.
  • 14) Had QTcF >500 msec when QRS interval <120 msec or QTcF >520 msec when QRS ≥120 msec or any other ECG abnormality considered by the investigator to pose a risk to participant safety (eg, second-degree atrioventricular block type II).
  • 15) Had documented obstructive coronary artery disease (>70% stenosis in 1 or more epicardial coronary arteries) or history of myocardial infarction.
  • 16) Had known moderate or severe (as per investigator's judgment) aortic valve stenosis, constrictive pericarditis, or clinically significant congenital heart disease at screening.
  • 17) Had any acute or serious comorbid condition (eg, major infection or hematologic, renal, metabolic, gastrointestinal, or endocrine dysfunction) that, in the judgment of the investigator, could lead to premature termination of study participation or interfere with the measurement or interpretation of the efficacy and safety assessments in the study.
  • 18) Unable to comply with the study requirements, including the number of required visits to the clinical site.
  • 19) Pregnant or lactating female.

Trial locations and contacts

No sites are listed yet. Contact the study team or a site near you to ask about taking part.

Mu contact

About this study

This study aims to evaluate the efficacy and safety of Mavacamten combined with radiofrequency ablation compared to Mavacamten alone in patients with symptomatic obstructive hypertrophic cardiomyopathy (HOCM).

Participants were randomized into two groups:

Read the detailed description

This study aims to evaluate the efficacy and safety of Mavacamten combined with radiofrequency ablation compared to Mavacamten alone in patients with symptomatic obstructive hypertrophic cardiomyopathy (HOCM).

Participants were randomized into two groups:

Group 1: Mavacamten monotherapy Group 2: Mavacamten + Radiofrequency Ablation

Being tested
radiofrequency ablation, Mavacamten
Medical subject headings
Cardiomyopathy, Hypertrophic

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • radiofrequency ablationProcedure or surgery

    Radiofrequency Ablation is a minimally invasive interventional technique performed via catheter guidance. It utilizes thermal energy (50-80°C) generated by high-frequency alternating current (typically 300-750 kHz) to induce coagulative necrosis or electrophysiological isolation in targeted tissues, thereby eliminating abnormal electrical activity or mechanical obstruction. In the treatment of cardiomyopathy, RFA is applied to ablate hypertrophied myocardial tissue (e.g., the ventricular septum) to alleviate left ventricular outflow tract (LVOT) obstruction.

  • MavacamtenDrug

    Initial Dose: Both groups received a starting dose of Mavacamten 2.5 mg orally once daily.

    Dose Titration: Adjustments were made based on a previously published titration protocol, guided by correlations among resting left ventricular ejection fraction (LVEF), LVOT gradient during Valsalva maneuver, and pre-dose Mavacamten plasma concentrations.

Study groups in NCT06856265
Study groupRoleWhat they receive
Mavacamten monotherapyActive comparatorInitial Dose: Both groups received a starting dose of Mavacamten 2.5 mg orally once daily. Dose Titration: Adjustments were made based on a previously published titration protocol, guided by correlations among resting left ventricular ejection fraction (LVEF), LVOT gradient during Valsalva maneuver, and pre-dose Mavacamten plasma concentrations. Permitted Doses: Individualized doses included 1 mg, 2.5 mg, 5 mg, 10 mg, or 15 mg.
Receives: Drug: Mavacamten
Mavacamten combined with radiofrequency ablationExperimentalInitial Dose: Both groups received a starting dose of Mavacamten 2.5 mg orally once daily. Dose Titration: Adjustments were made based on a previously published titration protocol, guided by correlations among resting left ventricular ejection fraction (LVEF), LVOT gradient during Valsalva maneuver, and pre-dose Mavacamten plasma concentrations. Permitted Doses: Individualized doses included 1 mg, 2.5 mg, 5 mg, 10 mg, or 15 mg. Post-procedure Initiation: In the combination therapy group, Mavacamten was initiated within 24 hours after radiofrequency ablation.
Receives: Procedure: radiofrequency ablation; Drug: Mavacamten

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Change in Valsalva LVOT peak gradient from baseline to week 30, as determined by Doppler echocardiography.

    Change in Valsalva LVOT peak gradient from baseline to week 30, as determined by Doppler echocardiography.

    Measured: from baseline to week 30

Secondary outcomes (9)
  1. The proportion of patients at week 30 with a Valsalva LVOT peak gradient less than 30mmHg.

    The proportion of patients at week 30 with a Valsalva LVOT peak gradient less than 30mmHg.

    Measured: At week 30

  2. The proportion of patients at week 30 with a Valsalva LVOT peak gradient less than 50 mm Hg.

    The proportion of patients at week 30 with a Valsalva LVOT peak gradient less than 50 mm Hg.

    Measured: At week 30

  3. The proportion of patients at week 30 at least 1 class improvement in NYHA functional classification.

    The proportion of patients at week 30 at least 1 class improvement in NYHA functional classification.

    Measured: Changes from baseline to week30 in the resting LVOT peak gradient

  4. Changes from baseline to week30 in the resting LVOT peak gradient.

    Changes from baseline to week30 in the resting LVOT peak gradient

    Measured: from baseline to week 30

  5. Changes from baseline to week 30 in the KCCQ Clinical Summary Score (KCCQ-CSS)

    Changes from baseline to week 30 in the KCCQ Clinical Summary Score (KCCQ-CSS),

    Measured: from baseline to week 30

  6. Changes from baseline to week 30 in the N-terminal pro-B-type natriuretic peptide (NT-proBNP) level.

    Changes from baseline to week 30 in the N-terminal pro-B-type natriuretic peptide (NT-proBNP) level

    Measured: from baseline to week 30

  7. Changes from baseline to week 30 in the high-sensitivity cardiac troponin I (hs-cTnI) level.

    Changes from baseline to week 30 in the high-sensitivity cardiac troponin I (hs-cTnI) level.

    Measured: from baseline to week 30.

  8. Changes from baseline to week 30 left of the ventricular mass index (LVMI) evaluated by CMR imaging.

    Changes from baseline to week 30 left of the ventricular mass index (LVMI) evaluated by CMR imaging.

    Measured: from baseline to week 30

  9. Incidence and severity of treatment-emergent adverse events (TEAEs) and serious adverse events (SAEs).

    Incidence and severity of treatment-emergent adverse events (TEAEs) and serious adverse events (SAEs).

    Measured: from baseline to week 30

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted4 Mar 2025
  2. Study start26 Feb 2025 (estimated)
  3. Primary completion1 Dec 2025 (estimated)
  4. Study completion1 Dec 2025 (estimated)

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase N/A
Primary purpose
Treatment
Allocation
Randomised
Intervention model
Parallel groups
Model description
Trial Design: Participants were randomly assigned to two groups: Group 1: Mavacamten monotherapy Group 2: Mavacamten combined with radiofrequency ablation Dosing Protocol: Initial Dose: Both groups received a starting dose of Mavacamten 2.5 mg orally once daily. Dose Titration: Adjustments were made based on a previously published titration protocol, guided by correlations among resting left ventricular ejection fraction (LVEF), LVOT gradient during Valsalva maneuver, and pre-dose Mavacamten plasma concentrations. Permitted Doses: Individualized doses included 1 mg, 2.5 mg, 5 mg, 10 mg, or 15 mg. Post-procedure Initiation: In the combination therapy group, Mavacamten was initiated within 24 hours after radiofrequency ablation.
Masking
None (open label)
Enrolment
40 participants (estimated)
IDs, dates and publications
ClinicalTrials.gov ID
NCT06856265
Sponsor's protocol ID
MRAHC
Status last verified
Feb 2025
First submitted
26 Feb 2025
Last updated
4 Mar 2025
Results posted
No
Data monitoring committee
Yes
FDA-regulated drug
No
FDA-regulated device
No
Individual data sharing
No

Questions about this trial

What is this clinical trial studying?

A study testing radiofrequency ablation and Mavacamten in people with Obstructive Hypertrophic Cardiomyopathy and Mavacamten, run by Shanghai Chest Hospital.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 8 inclusion and 15 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: opening soon, as of the sponsor's last update on 4 Mar 2025. Status can change between updates, so confirm with the study contact before making plans.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

Are results available for this study?

This study is still under way. Results are not available in the source record yet.

How can a doctor refer a patient or contact the research team?

Contact Mu, or a site near the patient. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Change in Valsalva LVOT peak gradient from baseline to week 30, as determined by Doppler echocardiography. (time frame: from baseline to week 30). It is what the study was designed to measure, not a finding.

Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 4 Mar 2025.

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