Symptomatic Non-Obstructive Hypertrophic CardiomyopathyPhase 3ACACIA-HCMNCT06081894
A Trial to Evaluate the Efficacy and Safety of Aficamten Compared to Placebo in Adults With Symptomatic Non-Obstructive Hypertrophic Cardiomyopathy (nHCM)
A Phase 3 study testing Aficamten in people with Symptomatic Non-Obstructive Hypertrophic Cardiomyopathy, run by Cytokinetics at 180 sites in 20 countries.
Trial summary
This clinical trial will study the effects of aficamten (versus placebo) on the quality of life, exercise capacity, and clinical outcomes of patients with non-obstructive hypertrophic cardiomyopathy. Read more about this study
- Who is it for?
- Ages 18 to 85 years
- Conditions the study is for
- Symptomatic Non-Obstructive Hypertrophic Cardiomyopathy
- What is being tested?
- Aficamten
- Type of treatment
- Pill or oral medicine
- Could I receive a placebo?
- Yes, some participants may receive a placebo
- How many people
- 500 participants
- Where
- 180 sitesin 20 countries
- Study dates
- 31 Aug 2023to Nov 2026
- Phase
- Phase 3
- 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 to 85 years
- All sexes
- No healthy volunteers
- Adult, Older adult
Who may be able to join
- Between 18-85 years of age
- Body mass index < 40 kg/m2
- Diagnosed with nHCM and has a screening echocardiogram with the following:
- End-diastolic left ventricular (LV) wall thickness:
- ≥ 15 mm in one or more myocardial segments OR
- ≥ 13 mm in one or more wall segments and a known disease-causing gene mutation or positive family history of HCM AND
Show all 15Show fewer
- Resting LVOT-G < 30 mmHg AND Valsalva LVOT-G < 50 mmHg AND
- LVEF ≥ 60%
- Participants with a history of intracavitary obstruction are eligible.
- NYHA class II or III
- Respiratory exchange ratio of ≥ 1.00 at screening by cardiopulmonary exercise testing (CPET) and predicted peak oxygen uptake (pVO2) ≤ 90% for age and sex
- KCCQ-CSS score of ≤ 85
- NT-proBNP of:
- NT-pro BNP ≥ 300 pg/mL or NT-proBNP ≥ 900 pg/mL if in atrial fibrillation or atrial flutter OR
- For Black participants, an NT-pro BNP ≥ 225 pg/mL or NT-proBNP ≥ 675 pg/mL if in atrial fibrillation or atrial flutter
Who cannot join
- Significant valvular heart disease (per Investigator judgment)
- Moderate or severe valvular aortic stenosis or fixed subaortic obstruction
- Moderate or severe mitral regurgitation
- Known or suspected infiltrative, genetic or storage disorder causing cardiac hypertrophy that mimics nHCM (eg, Noonan syndrome, Fabry disease, amyloidosis)
- Known current unrevascularized coronary artery stenosis of ≥ 70% or documented history of myocardial infarction.
- History of LV systolic dysfunction (LVEF < 45%) or stress cardiomyopathy
Show all 18Show fewer
- Inability to exercise on a treadmill or bicycle (eg, orthopedic limitations)
- Documented room air oxygen saturation reading < 90% at screening or history of significant chronic obstructive pulmonary disease or severe/significant pulmonary hypertension
- History of syncope, symptomatic ventricular arrhythmia, or sustained ventricular tachyarrhythmia with exercise within 3 months prior to screening
- History of resistant hypertension (persistently elevated blood pressure despite maximal doses of 3 or more classes of medications for hypertension control)
- Screening diastolic blood pressure ≥ 100 mmHg
- Received prior treatment with aficamten
- Received treatment with mavacamten within 3 months prior to screening (must be discussed with the medical monitor prior to screening)
- Undergone septal reduction therapy < 6 months prior to screening
- Is being considered for or is likely to be considered for heart transplant listing or left ventricular assist device placement during the study period
- Paroxysmal or permanent atrial fibrillation is excluded only if:
- rhythm restoring treatment (e.g., direct-current cardioversion, atrial fibrillation ablation procedure, or antiarrhythmic therapy) has been required ≤ 3 months prior to screening
- rate control and anticoagulation have not been achieved for at least 3 months prior to screening.
Trial locations and contacts
180 sites in 20 countries.
180 sites in 20 countries
United States60 sites
Michigan Medicine
Ann Arbor, Michigan, 48109
Emory Clinic
Atlanta, Georgia, 30322
MedStar Union Memorial Hospital
Baltimore, Maryland, 21218
University of Alabama at Birmingham
Birmingham, Alabama, 35233
Massachusetts General Hospital
Boston, Massachusetts, 02114
Brigham and Women's Hospital
Boston, Massachusetts, 02115
Lahey Hospital & Medical Center
Burlington, Massachusetts, 01803
Medical University of South Carolina
Charleston, South Carolina, 29425
Sanger Heart & Vascular Institute - HCM Clinic
Charlotte, North Carolina, 28204
University of Virginia
Charlottesville, Virginia, 22903
The Lindner Research Center at The Christ Hospital
Cincinnati, Ohio, 45219
University Hospitals Cleveland Medical Center
Cleveland, Ohio, 44106
Cleveland Clinic
Cleveland, Ohio, 44195
Henry Ford Hospital
Detroit, Michigan, 48202
Northwestern University
Evanston, Illinois, 60208
Inova Health Care Services
Falls Church, Virginia, 22042
Piedmont Heart Institute (CPET)
Fayetteville, Georgia, 30214
Holy Cross Medical Group - Cardiology Associates
Fort Lauderdale, Florida, 33308
Greenville Memorial Hospital
Greenville, South Carolina, 29605-5601
The Queen's Medical Center-Punchbowl
Honolulu, Hawaii, 96813
Baylor College of Medicine
Houston, Texas, 77030
Houston Methodist Hospital
Houston, Texas, 77030
Ascension St. Vincent
Indianapolis, Indiana, 46260
University of Iowa Hospitals and Clinics
Iowa City, Iowa, 52242
The University of Kansas Medical Center
Kansas City, Kansas, 66160
Saint Luke's Hospital of Kansas City
Kansas City, Missouri, 64111
UC San Diego Health - Sulpizio Cardiovascular Center
La Jolla, California, 92037
Keck Medical Center of USC (Outpatient Clinic)
Los Angeles, California, 90033
Cedars-Sinai Medical Center (Smidt Heart Institute)
Los Angeles, California, 90048
UCLA Medical Center Cardiovascular Clinic
Los Angeles, California, 90095
University of Wisconsin Hospitals and Clinics
Madison, Wisconsin, 53792
Northwell Health North Shore University Hospital
Manhasset, New York, 11030
Aurora St. Luke's Medical Center
Milwaukee, Wisconsin, 53215
Medical College of Wisconsin/Froedtert Hospital
Milwaukee, Wisconsin, 53226
M Health Fairview University of Minnesota Medical Center - East Bank
Minneapolis, Minnesota, 55455
WVU Medicine
Morgantown, West Virginia, 26506
Morristown Medical Center
Morristown, New Jersey, 07960
Intermountain Medical Center
Murray, Utah, 84107
Ascension Saint Thomas Heart West
Nashville, Tennessee, 37205
Vanderbilt University Medical Center
Nashville, Tennessee, 37232
Yale New Haven Hospital
New Haven, Connecticut, 06519
NYU Langone Health
New York, New York, 10016
Weill Cornell Medicine
New York, New York, 10021
Mount Sinai Hospital
New York, New York, 10029
Columbia University Medical Center/New York Presbyterian Hospital
New York, New York, 10032
Investigational Drug Services, AdventHealth Orlando
Orlando, Florida, 32804
Hospital of the University of Pennsylvania
Philadelphia, Pennsylvania, 19104
UPMC Presbyterian
Pittsburgh, Pennsylvania, 15213
Providence St. Vincent Medical Center
Portland, Oregon, 97225
Oregon Health & Science University
Portland, Oregon, 97239
VCU Health Downtown Medical Campus
Richmond, Virginia, 23298
Carilion Clinic Cardiology
Roanoke, Virginia, 24014
Mayo Clinic
Rochester, Minnesota, 55905
University of Utah Health
Salt Lake City, Utah, 84132
University of California San Francisco
San Francisco, California, 94143
Virginia Mason Medical Center
Seattle, Washington, 98101
Providence Sacred Heart Medical Center & Children's Hospital (CPET)
Spokane, Washington, 99204
Lundquist Institute for Biomedical Innovation at Harbor-UCLA Medical Center
Torrance, California, 90502
Westchester Medical Center
Valhalla, New York, 10595
MedStar Washington Hospital Center
Washington D.C., District of Columbia, 20010
Japan22 sites
Kyushu University Hospital
Fukuoka, 812-8582
Kobe City Medical Center General Hospital
Hyōgo, 650{047
Hyogo Prefectural Harima-Himeii General Medical Center
Hyōgo, 670-8560
University of Tsukuba Hospital
Ibaraki, 305-8576
SHOWA Medical University Fujigaoka Hospital
Kanagawa, 227-8501
Kochi Medical School Hospital
Kochi, 783-8505
National Hospital Organization Kyoto Medical Center
Kyoto, 612-0861
Mie University Hospital
Mie, 514-8507
National University Corporation Tohoku University Tohoku University Hospital
Miyagi, 980-8574
Shinshu University Hospital
Nagano, 390-8621
Osaka Metropolitan University Hospital
Osaka, 545-8586
Osaka General Medical Center
Osaka, 558-8558
National Cerebral and Cardiovascular Center
Osaka, 564-8565
Osaka Medical and Pharmaceutical University Hospital
Osaka, 569-8686
Kitasato University Hospital
Sagamihara, 252-0375
Saitama Medical University International Medical Center
Saitama, 350-1298
Hamamatsu University Hospital
Shizuoka, 431-3192
St. Luke's International Hospital
Tokyo, 104-8560
Nippon Medical School Hospital
Tokyo, 113-8603
The University of Tokyo Hospital
Tokyo, 113-8655
Tokyo Women's Medical University Hospital
Tokyo, 162-8666
Teikyo University Hospital
Tokyo, 173-8606
Spain13 sites
Complejo Hospitalario Universitario A Coruna
A Coruña, 15006
Hospital de la Santa Creu i Sant Pau
Barcelona, 08025
Hospital Clinic i Provincial de Barcelona
Barcelona, 08036
Hospital General Universitario Gregorio Marañón (HGUGM), Calle del Doctor Esquerdo, 46.
Madrid, 28007
Hospital Clinico San Carlos
Madrid, 28040
Hospital Universitario Puerta de Hierro
Madrid, 28220
Hospital Universitario Virgen de la Victoria Campus Universitario de Teatinos
Málaga, 29010
Hospital Clinico Universitario Virgen de la
Murcia, 30120
Hospital Son Llatzer
Palma de Mallorca, 07198
Hospital Universitario de Salamanca
Salamanca, 37007
Hospital Universitario Virgen Macarena
Seville, 41009
Hospital Universitario Virgen del Rocio
Seville, 41013
Hospital Alvaro Cunqueiro
Vigo, 36312
China12 sites
Peking University First Hospital
Beijing, 100034
Fuwai Hospital, CAMS & PUMC
Beijing, 100037
The 1st Affiliated Hospital of Sun Yat-sen University
Guangzhou, Guangdong, 510080
Guangdong Provincial People's Hospital
Guangzhou, 519041
The First Hospital of Jilin University
Jilin City, 130031
Zhongda Hospital Southeast University
Nanjin, 210009
Shanghai Ruijin Hospital Luwan Branch
Shanghai, 200020
Zhongshan Hospital Fudan University
Shanghai, 200032
People's Hospital of Liaoning Province
Shenyang, 110067
Remin Hospital of Wuhan University
Wuhan, 430060
The 1st affi. Hospital of Xi'an Jiaotong University
Xi'an, 710061
The 1st affiliated Hospital of Zhengzhou University
Zhenzhou, 450052
Italy10 sites
UOC Cardiologica
Brescia, 25123
Azienda Ospedaliera Universitaria Careggi pad. 13 Clinica Medica II Plano Cardiologia
Florence, 50134
Cardiologia Universitaria - UTIC - Riabilitazione Cardiologica Azienda Ospedaliero Universitaria - Ospedali Riuniti
Foggia, 71122
Unita Operativa di Riabilitazione Cardiologica, Istituto Auxologico Italiano, IRCCS - Auxologico San Luca, Piazzale Brescia, 20
Milan, 20149
Dipartimento Cardio-toraco- vascolare, ASST Grande Ospedale Metropolitano, NiguardaPiazza Ospedale Maggiore, 3
Milan, 20162
Dipartimento di Emergenze Cardiovascolari, Medicina Clinica e dell'Invecchiamento, AOU Federico II
Naples, 80131
Fondazione Toscana Gabriele Monasterio Per La ricerca Medica e Di Sanita Pubbliga (FTGM) Cardio-Toracic-UOC Cardiology and Cardiovasulcar Medicine San Cataldo Hospital at CNR
Pisa, 56124
Dipartimento Cardiopolmonare, Istituto di Ricovero e Cura a Carattere Scientifico San Raffaele
Roma, 00163
Cardiology Department IRCCS San Donato Hospital - University of Milan
San Donato Milanese, Milano, 20097
Azienda Sanitaria Universitaria Giuliano Isontina Trieste SC Cardiologia
Trieste, 34148
Brazil9 sites
Fundacao Felice Rocho / Hospital Felicio Rocho
Minas Gerais, 30110-934
NUPEC Cardio / Cardio HVC
Minas Gerais, 30220-140
Instituto D'Or de Pesquisa e Ensino/Cardio Pulmonar da Bahia SA
Ondina, Salvador, 40170-0130
CLINICOR Clinica Cardiologica LTDA
Ribeirão Preto, 14026-900
Instituto Dante Pazzanese de Cardiologia
São Paulo, 04012-909
Instituto do Coracao do Hospital de Aguiar
São Paulo, 05403-900
Associacao Lar Sao Francisco de Assis na Providencia de Deus - Hospital Universitario Sao Francisco na Providencia de Deus (HUSF)
São Paulo, 12916-542
Saraiva & Berlinger LTDA - EPP/IPECC - Instituto de Pesquisa Clinical de Campinas
São Paulo, 13060-080
Hospital das Clinicas de Faculdade de Medicina de Ribeirao Preto da Universidade de Sao Paulo - HCFMRP
São Paulo, 14051-140
France8 sites
Assistance Publique Hopitaux de Marseille
Marseille, 13005
Clinique Du Millenaire
Montpellier, 34000
Centre Hospitalier Universitaire De Montpellier
Montpellier, 34295
Assistance Publique Hopitaux De Paris
Paris, 75010
Assistance Publique Hopitaux de Paris
Paris, 75015
Centre Hospitalier Universitaire De Bordeaux
Pessac, 33600
Centre Hospitalier Universitaire De Nantes
Saint-Herblain, 44800
Hopital Rangueil
Toulouse, 31059
United Kingdom7 sites
NHS Tayside Ninewells Hospital & Medical School
Dundee, Scotland, DD1 9SY
NHS Greater Glasgow and Clyde Queen Elizabeth University Hospital
Glasgow, G51 4TF
Liverpool Heart and Chest Hospital NHS Foundation Trust
Liverpool, L14 3PE
Barts Health NHS Trust St Bartholomew's Hospital
London, EC1A 7BE
St George's University Hospitals NHS Foundation Trust,
London, SW17 0QT
Royal Brompton Hospital
London, SW3 6NP
Oxford Centre for Clinical Magnetic Resonance Research (Ocmr)
Oxford, OX3 9DU
Canada5 sites
Royal Alexandra Hospital
Edmonton, Alberta, T5H 3V9
Health Sciences North
Greater Sudbury, Ontario, P3E 5J1
QEII Health Science Centre (Halifax Infirmary site)
Halifax, B3H 3A7
Montreal Heart Institute
Montreal, Quebec, H1T 1C8
St. Boniface Hospital
Winnipeg, Manitoba, R2H 2A6
Israel5 sites
The Barzilai University Medical Center 2 - Cardiology Division
Ashkelon, 7830604
Division of Cardiology Hadassah Medical Center
Jerusalem, 9112001
Meir Medical Center
Kfar Saba, 4428164
The Chaim Sheba Medical Center
Ramat Gan, 5265601
Ziv Medical Center
Safed, 1311001
Portugal5 sites
Unidade Local de Saude da Regiao de Aveiro, E.P.E.
Aveiro, 3814-501
Unidade Local de Saude do Alto Ave, E.P.E
Creixomil, Guimaraes, 4835-044
Unidade Local de Saude de Sao Jose, E.P.E, - Hospital de Santa Marta Servico de Cardiologia
Lisbon, 1150-199
Hospital da Luz
Lisbon, 1500-650
Hospital CUF Descobertas, Lisbon, Cadiology Department
Lisbon, 1998-018
Germany4 sites
Charite-Universitaetsmedizin Berlin Campus Virchow-Klinikum (CVK) Medizinische Klinik mit Schwerpunkt Kardiologie
Berlin, 13353
Herzzentrum der Universitatsmedizin Gottingen
Göttingen, 37075
Universitaesklinkum Heidelberg Klinik fuer Kardiologie, Angeiologie und Pneumologie
Heidelberg, 69120
Univeristy Hospital Jena Clinic for Internal Medicine I (Cardiology, Angiology, Internal Intensive Care Medicine)
Jena, 07747
Greece4 sites
Evangelismos General Hospital of Athens
Athens, 10676
"Hippokration" General Hospital of Athens
Athens, 11527
University General Hospital Attikon
Attiki, 12462
Onassis Cardiac Surgery Center
Kallithea, 17674
Argentina3 sites
Hospital Italiano de Buenos Aires Juan Domingo Peron
Buenos Aires, 119
ICBA - Instituto Cardiovascular de Buenos Aires
Buenos Aires, C1428
Hospital Privado Centro Medico de Cordoba S.A
Córdoba, X5016KEH
Australia3 sites
Flinders Medical Centre Cardiology Research
Adelaide, South Australia, 5042
The Prince Charles Hospital
Chermside, Queensland, 4032
Fiona Stanley Hospital, AHF Unit
Murdoch, 6150
Denmark3 sites
Aarhus University Hospital
Aarhus, 8200
Department of Cardiology Copenhagen University Hospital, Bispebjerg
Copenhagen, 2400
Odense University Hospital, Department of Cardiology
Odense, 5000
Netherlands3 sites
Amsterdam UMC, location AMC
Amsterdam, 1105
P. Debyelaan 25
Maastricht, HX, 6229
Erasmus University Medical Center
Rotterdam, 3015
Hungary2 sites
Semmelweis Egyetem Varosmajori Sziv- es Ergyogyaszati Klinika
Budapest, 1122
University of Szeged
Szeged, 6725
About this study
Official title: A Phase 3, Multi-Center, Randomized, Double-Blind Trial to Evaluate the Efficacy and Safety of Aficamten Compared to Placebo in Adults With Symptomatic Non-Obstructive Hypertrophic Cardiomyopathy
This clinical trial will study the effects of aficamten (versus placebo) on the quality of life, exercise capacity, and clinical outcomes of patients with non-obstructive hypertrophic cardiomyopathy.
- Being tested
- Aficamten, Placebo
- Keywords
- CK-3773274, CK-274, Aficamten, Symptomatic Non-Obstructive Hypertrophic Cardiomyopathy, nHCM, ACACIA-HCM, ACACIA
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
AficamtenDrug
Oral Tablet
PlaceboDrug
Oral Tablet
| Study group | Role | What they receive |
|---|---|---|
| Aficamten | Experimental | Participants in this arm will receive a single daily oral dose of 5 mg, 10 mg, 15 mg, or 20 mg of aficamten with dose levels guided by echocardiography assessments, for up to 72 weeks. Receives: Drug: Aficamten |
| Placebo | Placebo comparator | Participants in this arm will receive placebo, for up to 72 weeks. Receives: Drug: Placebo |
What is being measured
The primary outcome is the main question the study is designed to answer.
Change in Kansas City Cardiomyopathy Questionnaire - Clinical Summary Score (KCCQ-CSS)
Effect of aficamten compared with placebo on participant health status
Measured: Baseline to Week 36
Change in pVO2
Effect of aficamten compared with placebo on maximal exercise capacity
Measured: Baseline to Week 36
Secondary outcomes (5)
Change in composite of two Z-scores of CPET parameters (pVO2 and VE/VCO2 slope)
Effect of aficamten compared with placebo on global exercise capacity based on maximal and sub-maximal exercise performance
Measured: Baseline to Week 36
Proportion of participants with ≥ 1 class improvement in New York Heart Association (NYHA) Functional Class
Effect of aficamten compared with placebo on NYHA Functional Classification
Measured: Baseline to Week 36
Change in N-terminal prohormone brain natriuretic peptide (NT-proBNP)
Effect of aficamten compared with placebo on a biomarker of cardiac wall stress
Measured: Baseline to Week 36
Change in Left Atrial Volume Index (LAVI) in participants without atrial fibrillation or flutter at baseline on ECG
Effect of aficamten compared with placebo on echocardiographic measures of structural remodeling
Measured: Baseline to Week 36
Time to first cardiovascular (CV) event
Effect of aficamten compared with placebo on cardiovascular events (ie, CV death, heart transplantation or left ventricular assist device, aborted sudden cardiac death, non-fatal stroke, heart failure hospitalization, or cardiac arrhythmia (atrial fibrillation or ventricular tachyarrhythmia) requiring treatment or hospitalization)
Measured: Baseline to End of Study, Week 72
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted13 Oct 2023
- Study start31 Aug 2023
- Primary completion31 Aug 2026
- Study completionNov 2026 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (3)Papers the sponsor has linked to this study.
- Other trials for Symptomatic Non-Obstructive Hypertrophic CardiomyopathyStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
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 3
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Double blind
- Who is masked
- Participant, Investigator
- Enrolment
- 500 participants (estimated)
Sponsor and investigators
- Lead sponsor
- Cytokinetics
- Sponsor type
- Industry (pharma, biotech, devices)
- Responsible party
- Sponsor
- Investigators
- Cytokinetics MD, Study director, Cytokinetics
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT06081894
- Sponsor's protocol ID
- CY 6033
- Other IDs
- 2023-505797-15-00, 2023
- Acronym
- ACACIA-HCM
- Status last verified
- Sep 2026
- First submitted
- 31 Aug 2023
- Last updated
- 22 Sep 2026
- Results posted
- No
- Data monitoring committee
- Yes
- FDA-regulated drug
- Yes
- FDA-regulated device
- No
- Individual data sharing
- No
Publications
Hegde SM, Wang X, Bhatia A, Pena-Pena ML, Sherrid MV, Figueiredo EL, Arad M, Barriales-Villa R, Choudhury L, Claggett BL, Coats CJ, de Barros Correia E, Costabel JP, Elliott PM, Silva Enciso JE, Garcia-Pavia P, Ge J, Ho CY, Lakdawala NK, Lewis GD, Maron MS, Martinez MW, Masri A, Maurer MS, Michels M, Mitter SS, Pino Moreno JE, Nagy V, Olivotto I, Owens AT, Poulsen SH, Rader F, Rowin EJ, Ruda M, Schulze PC, Sikand N, Spertus JA, Zhao X, Divanji PH, Heitner SB, Jacoby DL, Kupfer S, Malik FI, Salazar-Mendiguchia J, Wohltman A, Zhuo S, Solomon SD; ACACIA-HCM Investigators. Effect of Aficamten on Cardiac Structure and Function in Patients with Symptomatic Nonobstructive Hypertrophic Cardiomyopathy. Circulation. 2026 Aug 29. doi: 10.1161/CIRCULATIONAHA.126.082343. Online ahead of print.
PubMed 42667274Masri A, Maron MS, Bhatia A, Pena-Pena ML, Sherrid MV, Figueiredo EL, Arad M, Barriales-Villa R, Choudhury L, Claggett BL, Coats CJ, Correia EB, Costabel JP, Elliott PM, Silva Enciso JE, Garcia-Pavia P, Ge J, Hegde SM, Lewis GD, Lopes RD, Martinez MW, Maurer MS, Miao ZM, Michels M, Mitter SS, Pino Moreno JE, Olivotto I, Owens AT, Poulsen SH, Rader F, Rowin EJ, Schulze PC, Sepp R, Sikand N, Solomon SD, Spertus JA, Teale C Sr, Zhao X, Divanji PH, Heitner SB, Jacoby DL, Kupfer S, Malik FI, Salazar-Mendiguchia J, Wohltman A, Zhuo S, Ho CY; ACACIA-HCM Investigators. Aficamten for Symptomatic Nonobstructive Hypertrophic Cardiomyopathy. N Engl J Med. 2026 Aug 28. doi: 10.1056/NEJMoa2603021. Online ahead of print.
PubMed 42663312Maron MS, Masri A, Bhatia A, Pena-Pena ML, Sherrid MV, Figueiredo EL, Arad M, Choudhury L, Claggett BL, Coats CJ, de Barros Correia E, Costabel JP, Elliott PM, Silva Enciso JE, Ge J, Ho CY, Kulac I, Lewis GD, Martinez MW, Maurer MS, Michels M, Mitter SS, Pino Moreno JE, Olivotto I, Owens AT, Poulsen SH, Rader F, Rowin EJ, Schulze PC, Sepp R, Sikand N, Solomon SD, Spertus JA, Zhao X, Divanji PH, Heitner SB, Jacoby DL, Kupfer S, Malik FI, Salazar-Mendiguchia J, Wohltman A, Zhuo S, Barriales-Villa R; ACACIA-HCM Investigators. Global Efficacy of Aficamten in Nonobstructive Hypertrophic Cardiomyopathy: Results From ACACIA-HCM. Circulation. 2026 Aug 28. doi: 10.1161/CIRCULATIONAHA.126.082026. Online ahead of print.
PubMed 42663111
Study at a glance
From the registry record, last updated by the sponsor on 22 Sep 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- A Phase 3, Multi-Center, Randomized, Double-Blind Trial to Evaluate the Efficacy and Safety of Aficamten Compared to Placebo in Adults With Symptomatic Non-Obstructive Hypertrophic Cardiomyopathy
- ClinicalTrials.gov ID
- NCT06081894
- Acronym / sponsor ID
- ACACIA-HCM / CY 6033
- Keywords
- CK-3773274, CK-274, Aficamten, Symptomatic Non-Obstructive Hypertrophic Cardiomyopathy, nHCM, ACACIA-HCM, ACACIA
- Phase
- Phase 3
- Study type
- Interventional
- Recruitment status
- Active, not recruiting
- Enrolment
- 500 participants (estimated)
- Lead sponsor
- CytokineticsIndustry (pharma, biotech, devices)
- Collaborators
- Sanofi, Bayer
- Study start
- 31 Aug 2023 (actual)
- Primary completion
- 31 Aug 2026 (actual)
- Study completion
- Nov 2026 (estimated)
- First posted
- 13 Oct 2023 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
This clinical trial will study the effects of aficamten (versus placebo) on the quality of life, exercise capacity, and clinical outcomes of patients with non-obstructive hypertrophic cardiomyopathy.
Study design
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Double blind (participant, investigator)
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| Aficamten | Experimental | Drug: AficamtenParticipants in this arm will receive a single daily oral dose of 5 mg, 10 mg, 15 mg, or 20 mg of aficamten with dose levels guided by echocardiography assessments, for up to 72 weeks. |
| Placebo | Placebo comparator | Drug: PlaceboParticipants in this arm will receive placebo, for up to 72 weeks. |
Who may qualify
- Ages
- 18 to 85 years
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (15 listed)
- Between 18-85 years of age
- Body mass index < 40 kg/m2
- Diagnosed with nHCM and has a screening echocardiogram with the following:
- NYHA class II or III
- Respiratory exchange ratio of ≥ 1.00 at screening by cardiopulmonary exercise testing (CPET) and predicted peak oxygen uptake (pVO2) ≤ 90% for age and sex
Key exclusion criteria (18 listed)
- Significant valvular heart disease (per Investigator judgment)
- Known or suspected infiltrative, genetic or storage disorder causing cardiac hypertrophy that mimics nHCM (eg, Noonan syndrome, Fabry disease, amyloidosis)
- Known current unrevascularized coronary artery stenosis of ≥ 70% or documented history of myocardial infarction.
- History of LV systolic dysfunction (LVEF < 45%) or stress cardiomyopathy
- Inability to exercise on a treadmill or bicycle (eg, orthopedic limitations)
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| AficamtenOral Tablet | Drug | Aficamten |
| PlaceboOral Tablet | Drug | Placebo |
Primary outcome
Change in Kansas City Cardiomyopathy Questionnaire - Clinical Summary Score (KCCQ-CSS)
Time frame: Baseline to Week 36
Effect of aficamten compared with placebo on participant health status
Change in pVO2
Time frame: Baseline to Week 36
Effect of aficamten compared with placebo on maximal exercise capacity
5 secondary outcomes
Change in composite of two Z-scores of CPET parameters (pVO2 and VE/VCO2 slope)
Time frame: Baseline to Week 36
Proportion of participants with ≥ 1 class improvement in New York Heart Association (NYHA) Functional Class
Time frame: Baseline to Week 36
Change in N-terminal prohormone brain natriuretic peptide (NT-proBNP)
Time frame: Baseline to Week 36
Change in Left Atrial Volume Index (LAVI) in participants without atrial fibrillation or flutter at baseline on ECG
Time frame: Baseline to Week 36
Time to first cardiovascular (CV) event
Time frame: Baseline to End of Study, Week 72
Results and safety
This study is still under way. Results are not available in the source record yet.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 22 Sep 2026.
- Derived from this study: PubMed 42667274Hegde SM, Wang X, Bhatia A, Pena-Pena ML, Sherrid MV, Figueiredo EL, Arad M, Barriales-Villa R, Choudhury L, Claggett BL, Coats CJ, de Barros Correia E, Costabel JP, Elliott PM, Silva Enciso JE, Garcia-Pavia P, Ge J, Ho CY, Lakdawala NK, Lewis GD, Maron MS, Martinez MW, Masri A, Maurer MS, Michels M, Mitter SS, Pino Moreno JE, Nagy V, Olivotto I, Owens AT, Poulsen SH, Rader F, Rowin EJ, Ruda M, Schulze PC, Sikand N, Spertus JA, Zhao X, Divanji PH, Heitner SB, Jacoby DL, Kupfer S, Malik FI, Salazar-Mendiguchia J, Wohltman A, Zhuo S, Solomon SD; ACACIA-HCM Investigators. Effect of Aficamten on Cardiac Structure and Function in Patients with Symptomatic Nonobstructive Hypertrophic Cardiomyopathy. Circulation. 2026 Aug 29. doi: 10.1161/CIRCULATIONAHA.126.082343. Online ahead of print.
- Derived from this study: PubMed 42663312Masri A, Maron MS, Bhatia A, Pena-Pena ML, Sherrid MV, Figueiredo EL, Arad M, Barriales-Villa R, Choudhury L, Claggett BL, Coats CJ, Correia EB, Costabel JP, Elliott PM, Silva Enciso JE, Garcia-Pavia P, Ge J, Hegde SM, Lewis GD, Lopes RD, Martinez MW, Maurer MS, Miao ZM, Michels M, Mitter SS, Pino Moreno JE, Olivotto I, Owens AT, Poulsen SH, Rader F, Rowin EJ, Schulze PC, Sepp R, Sikand N, Solomon SD, Spertus JA, Teale C Sr, Zhao X, Divanji PH, Heitner SB, Jacoby DL, Kupfer S, Malik FI, Salazar-Mendiguchia J, Wohltman A, Zhuo S, Ho CY; ACACIA-HCM Investigators. Aficamten for Symptomatic Nonobstructive Hypertrophic Cardiomyopathy. N Engl J Med. 2026 Aug 28. doi: 10.1056/NEJMoa2603021. Online ahead of print.
- Derived from this study: PubMed 42663111Maron MS, Masri A, Bhatia A, Pena-Pena ML, Sherrid MV, Figueiredo EL, Arad M, Choudhury L, Claggett BL, Coats CJ, de Barros Correia E, Costabel JP, Elliott PM, Silva Enciso JE, Ge J, Ho CY, Kulac I, Lewis GD, Martinez MW, Maurer MS, Michels M, Mitter SS, Pino Moreno JE, Olivotto I, Owens AT, Poulsen SH, Rader F, Rowin EJ, Schulze PC, Sepp R, Sikand N, Solomon SD, Spertus JA, Zhao X, Divanji PH, Heitner SB, Jacoby DL, Kupfer S, Malik FI, Salazar-Mendiguchia J, Wohltman A, Zhuo S, Barriales-Villa R; ACACIA-HCM Investigators. Global Efficacy of Aficamten in Nonobstructive Hypertrophic Cardiomyopathy: Results From ACACIA-HCM. Circulation. 2026 Aug 28. doi: 10.1161/CIRCULATIONAHA.126.082026. Online ahead of print.
- Individual participant dataSharing planned: No
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Cytokinetics MD study director
Cytokinetics
180 sites in 20 countries: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A Phase 3 study testing Aficamten in people with Symptomatic Non-Obstructive Hypertrophic Cardiomyopathy, run by Cytokinetics at 180 sites in 20 countries.
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 15 inclusion and 18 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: under way, not looking for participants, as of the sponsor's last update on 22 Sep 2026. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 180 sites in United States, Japan, Spain, China, Italy and 15 more countries. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. Some participants in this study may receive a placebo. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
What does this phase mean?
Phase 3 studies compare the treatment with the current standard treatment or a placebo in a large group, to confirm how well it works and watch for side effects.
Not every study follows the same path, and some studies (observational studies, device studies) have no phase.
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?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Change in Kansas City Cardiomyopathy Questionnaire - Clinical Summary Score (KCCQ-CSS) (time frame: Baseline to Week 36). The study lists 2 primary outcomes in all. It is what the study was designed to measure, not a finding.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT06081894, which also lists 3 linked publications.
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 22 Sep 2026.