Current or Recent History of Atrial FibrillationPhase 2GENETIC-AFNCT01970501
Genetically Targeted Therapy for the Prevention of Symptomatic Atrial Fibrillation in Patients With Heart Failure
A Phase 2 study testing bucindolol hydrochloride and metoprolol succinate in people with Current or Recent History of Atrial Fibrillation, run by ARCA Biopharma, Inc. at 97 sites in 6 countries.
Trial summary
This study is being done to compare the effects of bucindolol hydrochloride (bucindolol) to metoprolol succinate (Toprol-XL) on the recurrence of symptomatic atrial fibrillation/atrial flutter in patients with heart failure who have a specific genotype for the beta-1 adrenergic receptor. Read more about this study
- Who is it for?
- Ages 18 to 85 years
- Conditions the study is for
- Current or Recent History of Atrial Fibrillation
- What is being tested?
- bucindolol hydrochloride and metoprolol succinate
- Type of treatment
- Pill or oral medicine
- Could I receive a placebo?
- Yes, some participants may receive a placebo
- How many people
- 267 participants
- Where
- 97 sitesin 6 countries
- Study dates
- Apr 2014to 28 Dec 2017
- Phase
- Phase 2
- Are there results?
- Yes, posted in the registrySummary in the doctors' view
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
- Must weigh at least 40 kg
- Possess the β1389 Arg/Arg genotype
- Left Ventricular Ejection Fraction (LVEF) < 0.50 assessed within 12 months prior to Screening
- At least one episode of symptomatic paroxysmal or persistent AF within 180 days of Screening
- Clinically appropriate for electrical cardioversion (ECV) if AF/AFL is present after study drug initiation
- Receiving appropriate anticoagulation therapy prior to Randomization
Who cannot join
- NYHA Class IV symptoms at the time of Randomization
- Significant fluid overload at Randomization
- Permanent AF at Screening
- More than two previous ECV within 6 months of Randomization or if the most recent ECV failed to produce SR
- Presence of an LVAD, or likely to requirement LVAD placement within 6 months of Randomization
- History of a successful atrioventricular (AV) node ablation
- History of an AF/AFL ablation within 30 days of Randomization
- Evidence of an appropriate firing of an implanted cardioverter-defibrillator (ICD) device for ventricular tachycardia (VT) or ventricular fibrillation (VF) within 90 days of Randomization
Trial locations and contacts
97 sites in 6 countries.
97 sites in 6 countries
United States48 sites
ARCA Clinical Research Site #173
Akron, Ohio, 44304
ARCA Clinical Research Site # 179
Albany, New York, 12205
ARCA Clinical Research Site #157
Anchorage, Alaska, 99508
ARCA Clinical Research Site #351
Athens, Georgia, 30606
ARCA Clinical Research Site #389
Atlanta, Georgia, 30322
ARCA Clinical Research Site #153
Aurora, Colorado, 80045
ARCA Clinical Research Site #398
Baltimore, Maryland, 21287
ARCA Clinical Site #391
Charlottesville, Virginia, 22908
ARCA Clinical Research Site #392
Cincinnati, Ohio, 45219
ARCA Clinical Research Site #322
Cleveland, Ohio, 44106
ARCA Clinical Research Site #151
Columbus, Ohio, 43210
ARCA Clinical Research Site #387
Dallas, Texas, 75230
ARCA Clinical Research Site #380
Denver, Colorado, 80120
ARCA Clinical Research Site #181
Durham, North Carolina, 27705
ARCA Clinical Research Site #381
East Palo Alto, California, 94303
ARCA Clinical Research Site #161
Elmer, New Jersey, 08318
ARCA Clinical Research Site #386
Falls Church, Virginia, 22042
ARCA Clinical Site #393
Germantown, Tennessee, 38138
ARCA Clinical Research Site #349
Greensboro, North Carolina, 27401
ARCA Clinical Research Site #303
Hammond, Indiana, 46320
ARCA Clinical Research Site # 189
Hershey, Pennsylvania, 17033
ARCA Clinical Research Site #202
Hillsborough, New Jersey, 08844
ARCA Clinical Research Site #388
Iowa City, Iowa, 52242
ARCA Clinical Research Site #198
Jackson, Tennessee, 38305
ARCA Clinical Research Site #109
Lancaster, Pennsylvania, 17603
ARCA Clinical Research Site #152
Lincoln, Nebraska, 68506
ARCA Clinical Research Site #186
Loma Linda, California, 92357
ARCA Clinical Research Site #200
Manassas, Virginia, 20109
ARCA Clinical Research Site #195
Miami, Florida, 33136
ARCA Clinical Research Site #156
Minneapolis, Minnesota, 55417
ARCA Clinical Site #396
New Orleans, Louisiana, 70121
ARCA Clinical Research Site #397
New York, New York, 10029
ARCA Research Site #131
Norfolk, Virginia, 23507
ARCA Clinical Research Site #342
Oakbrook Terrace, Illinois, 60181
ARCA Clinical Research Site #399
Oklahoma City, Oklahoma, 73135
ARCA Clinical Research Site #320
Pasadena, California, 91105
ARCA Clinical Research Site #133
Philadelphia, Pennsylvania, 19104
ARCA Clinical Research Site #383
Phoenix, Arizona, 85004
ARCA Clinical Research Site #385
Phoenix, Arizona, 85018
ARCA Clinical Research Site #115
Portland, Oregon, 97201
ARCA Clinical Research Site #196
Puyallup, Washington, 98372
ARCA Clinical Research Site #174
Saint Paul, Minnesota, 55102
ARCA Clinical Research Site #379
Salt Lake City, Utah, 84132
ARCA Clinical Research Site #108
St Louis, Missouri, 63110
ARCA Clinical Research Site #201
St Louis, Missouri, 63128
ARCA Clinical Research Site #390
Stanford, California, 94305
ARCA Clinical Research Site #184
Tampa, Florida, 33606
ARCA Clinical Research Site #127
Ypsilanti, Michigan, 48197
Canada18 sites
ARCA Clinical Research Site #612
Calgary, Alberta, T2N 4Z6
ARCA Clinical Research Site #611
Cambridge, Ontario, N1R 6V6
ARCA Clinical Research Site #621
Cambridge, Ontario, N1R 7R1
ARCA Clinical Research Site #601
Hamilton, Ontario, L8L 2X2
ARCA Clinical Research Site #609
London, Ontario, N6A 5A5
ARCA Clinical Research Site #614
Montreal, Quebec, H1T 1C8
ARCA Clinical Research Site #607
Montreal, Quebec, H2W 1T8
ARCA Clinical Research Site #603
Montreal, Quebec, H3G 1A3
ARCA Clinical Research Site #623
Newmarket, Ontario, L3Y 2P6
ARCA Clinical Research Site #618
Oshawa, Ontario, L1H 1B9
ARCA Clinical Research Site #613
Ottawa, Ontario, K1Y 4W7
ARCA Clinical Research Site #615
Québec, G1V 4G5
ARCA Clinical Research Site #625
Saint-Jérôme, Quebec, J7Z 5T3
ARCA Clinical Research Site #602
Sherbrooke, Quebec, J1H 5N4
ARCA Clinical Research Site #619
Toronto, Ontario, M4N 3M5
ARCA Clinical Research Site #626
Trois-Rivières, Quebec, G8Z 3R9
ARCA Clinical Research Site #624
Vancouver, British Columbia, V6E 1M7
ARCA Clinical Research Site #616
Waterloo, Ontario, N2J 1C4
Hungary9 sites
ARCA Clinical Research Site #726
Budapest, 1096
ARCA Clinical Research Site #727
Budapest, 1122
ARCA Clinical Research Site #728
Budapest, 1134
ARCA Clinical Research Site #729
Budapest, 1145
ARCA Clinical Research Site #733
Debrecen, 4032
ARCA Clinical Research Site #732
Kaposvár, 7400
ARCA Clinical Research Site #730
Pécs, 7624
ARCA Clinical Research Site #731
Szeged, 6725
ARCA Clinical Research Site #734
Szolnok, 5000
Netherlands9 sites
ARCA Clinical Research Site #781
Capelle aan den IJssel, 2906 ZC
ARCA Clinical Research Site #779
Gorinchem, 4204 AA
ARCA Clinical Research Site #776
Groningen, 9713 GZ
ARCA Clinical Research Site #780
Helmond, 5707 HA
ARCA Clinical Research Site #782
Leiderdorp, 2334 CK
ARCA Clinical Research Site #786
Roosendaal, 4708 AE
ARCA Clinical Research Site #777
Sneek, 8601 ZK
ARCA Clinical Research Site #783
Stadskanaal, 9501 HE
ARCA Clinical Research Site #784
Tiel, 4002 WP
Poland8 sites
ARCA Clinical Research Site #752
Bialystok, 15-276
ARCA Clinical Research Site #757
Gdansk, 80-952
ARCA Clinical Research Site #753
Krakow, 31-501
ARCA Clinical Research Site #755
Lodz, 91-347
ARCA Clinical Research Site #751
Lodz, 92-213
ARCA Clinical Research Site #758
Lublin, 20-954
ARCA Clinical Research Site #754
Warsaw, 02-097
ARCA Clinical Research Site #756
Wroclaw, 50-981
Serbia5 sites
ARCA Clinical Research Site #807
Belgrade, 11000
ARCA Clinical Research Site #806
Belgrade, 11080
ARCA Clinical Research Site #801
Kragujevac, 34000
ARCA Clinical Research Site #804
Niš, 18000
ARCA Clinical Research Site #805
Niš, 18000
About this study
Official title: GENETIC-AF - A Genotype-Directed Comparative Effectiveness Trial of Bucindolol and Toprol-XL for Prevention of Symptomatic Atrial Fibrillation/Atrial Flutter in Patients With Heart Failure
This study is being done to compare the effects of bucindolol hydrochloride (bucindolol) to metoprolol succinate (Toprol-XL) on the recurrence of symptomatic atrial fibrillation/atrial flutter in patients with heart failure who have a specific genotype for the beta-1 adrenergic receptor.
Read the detailed description
The goal of the GENETIC-AF trial is to demonstrate the superiority of pharmacogenetically targeted bucindolol compared to metoprolol for the prevention of symptomatic atrial fibrillation or atrial flutter in a genotype-defined population with heart failure and/or reduced left ventricular ejection fraction at high risk of atrial fibrillation/atrial flutter recurrence.
- Being tested
- bucindolol hydrochloride, metoprolol succinate, Placebo oral capsule
- Keywords
- atrial fibrillation, atrial flutter, heart failure, reduced left ventricle ejection fraction, electrical cardioversion, GENETIC-AF, Medtronic, bucindolol, pharmacogenetic, ARCA, Toprol, Toprol-XL, Metoprolol, Metoprolol succinate
- Medical subject headings
- Atrial Fibrillation, Atrial Flutter, Heart Failure
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
bucindolol hydrochlorideDrug
Also called bucindolol
metoprolol succinateDrug
Also called Toprol-XL, metoprolol
Placebo oral capsuleOther
Also called placebo
| Study group | Role | What they receive |
|---|---|---|
| bucindolol hydrochloride | Experimental | bucindolol hydrochloride (bucindolol)
Participants were randomized (1:1) to blinded treatment with bucindolol or metoprolol and titrated weekly to target doses of 50 mg twice daily (BID; < 75 kg) or 100 mg BID (≥ 75 kg) for bucindolol or 200 mg once daily (QD) for metoprolol. 84% of bucindolol participants attained target dose and 72% of metoprolol participants attained target dose.
The lowest starting dose of bucindolol was 6.25 mg BID with weekly dose titrations to the weight-based target dose or to the maximum tolerated dose. The starting dose assigned was based on the patient's beta-blocker treatment prior to randomization. Capsules for titration were available in the following dosage strengths to be taken twice daily (with or without food): 6.25mg, 12.5mg, 25mg, 50mg, and 100mg. Receives: Drug: bucindolol hydrochloride |
| metoprolol succinate | Active comparator | metoprolol succinate (Toprol-XL)
Participants were randomized (1:1) to blinded treatment with bucindolol or metoprolol and titrated weekly to target doses of 50 mg twice daily (BID; < 75 kg) or 100 mg BID (≥ 75 kg) for bucindolol or 200 mg once daily (QD) for metoprolol. 84% of bucindolol participants attained target dose and 72% of metoprolol participants attained target dose.
The lowest starting dose of metoprolol was 25 mg QD with weekly dose titrations to the target dose or to the maximum tolerated dose. The starting dose assigned was based upon the patient's beta-blocker treatment prior to randomization. Capsules for titration were available in the following dosage strengths to be taken twice daily (with or without food): 25mg, 50mg, 100mg, 200mg and/or matching placebo oral capsule to maintain blinded dosing. Receives: Drug: metoprolol succinate; Other: Placebo oral capsule |
What is being measured
The primary outcome is the main question the study is designed to answer.
Time to First Event of Symptomatic Atrial Fibrillation/Atrial Flutter (AF/AFL) or All Cause Mortality (ACM) During the 24-week Follow-up Period After Establishment of Stable Sinus Rhythm (SR) on Study Drug [End of Treatment Week 24].
Time-to-event is calculated as the date of the event minus the date of initiation of efficacy follow-up, with 1 added in order to include both the start date and end date of the interval. Cox's proportional hazards model will be used to calculate estimated hazard ratios and 95% confidence intervals. The calculations will be performed with the SAS PHREG procedure, with the stratification variables specified in the STRATA statement and the treatment group comparator and any covariates being examined specified in the MODEL statement. For the primary endpoint, the appropriateness of assuming proportional hazards will be explored by the graphing of log (-log(survival function)) over follow-up for each treatment group.
Measured: end of treatment week 24
Secondary outcomes (3)
Time to First Event of Symptomatic or Asymptomatic AF/AFL or ACM During the 24-week Follow-up Period After Establishment of Stable SR on Study Drug [End of Treatment Week 24]
Number of days on study medication before participant experienced symptomatic or asymptomatic atrial fibrillation, atrial flutter, or all-cause mortality during the 24 week follow up period.
Measured: end of treatment week 24
Number of Patients With Adequate Ventricular Rate Control During the 24-week Follow-up Period
Number of patients with adequate ventricular rate control following the start of medication during the 24-week Follow-up Period
Measured: end of treatment week 24
Total Number of Hospitalization Days Per Patient (All-cause) During the Total Study Period (24 Weeks)
Total number of hospitalization days per patient (all-cause) following the start of study medication during the Total Study Period (24 weeks). Hospitalization was defined by a hospital admission (note that same day admit and discharge equates to 0 days duration), ER visits were not counted as events.
Measured: 24 weeks
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted28 Oct 2013 (estimated)
- Study startApr 2014
- Primary completion28 Dec 2017
- Study completion28 Dec 2017
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Posted resultsParticipant flow, outcome measures and adverse events reported by the sponsor.
- Publications (7)Papers the sponsor has linked to this study.
- Other trials for Current or Recent History of Atrial FibrillationStudies 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 2
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Quadruple blind
- Who is masked
- Participant, Care provider, Investigator, Outcomes assessor
- Enrolment
- 267 participants (actual)
Sponsor and investigators
- Lead sponsor
- ARCA Biopharma, Inc.
- Sponsor type
- Industry (pharma, biotech, devices)
- Collaborators
- Medtronic
- Responsible party
- Sponsor
- Investigators
- Jonathan Piccini, MD, Principal investigator, Duke UniversityMichael Bristow, MD,PhD, Study director, ARCA Biopharma, Inc.
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT01970501
- Sponsor's protocol ID
- BUC-CLIN-303
- Acronym
- GENETIC-AF
- Status last verified
- Sep 2022
- First submitted
- 23 Oct 2013
- Last updated
- 26 Sep 2022
- Results posted
- Yes, on ClinicalTrials.gov
- Data monitoring committee
- Yes
- Individual data sharing
- No
Publications
Liggett SB, Mialet-Perez J, Thaneemit-Chen S, Weber SA, Greene SM, Hodne D, Nelson B, Morrison J, Domanski MJ, Wagoner LE, Abraham WT, Anderson JL, Carlquist JF, Krause-Steinrauf HJ, Lazzeroni LC, Port JD, Lavori PW, Bristow MR. A polymorphism within a conserved beta(1)-adrenergic receptor motif alters cardiac function and beta-blocker response in human heart failure. Proc Natl Acad Sci U S A. 2006 Jul 25;103(30):11288-93. doi: 10.1073/pnas.0509937103. Epub 2006 Jul 14.
PubMed 16844790O'Connor CM, Fiuzat M, Carson PE, Anand IS, Plehn JF, Gottlieb SS, Silver MA, Lindenfeld J, Miller AB, White M, Walsh R, Nelson P, Medway A, Davis G, Robertson AD, Port JD, Carr J, Murphy GA, Lazzeroni LC, Abraham WT, Liggett SB, Bristow MR. Combinatorial pharmacogenetic interactions of bucindolol and beta1, alpha2C adrenergic receptor polymorphisms. PLoS One. 2012;7(10):e44324. doi: 10.1371/journal.pone.0044324. Epub 2012 Oct 10.
PubMed 23071495Aleong RG, Sauer WH, Davis G, Murphy GA, Port JD, Anand IS, Fiuzat M, O'Connor CM, Abraham WT, Liggett SB, Bristow MR. Prevention of atrial fibrillation by bucindolol is dependent on the beta(1)389 Arg/Gly adrenergic receptor polymorphism. JACC Heart Fail. 2013 Aug;1(4):338-344. doi: 10.1016/j.jchf.2013.04.002.
PubMed 24159564Kao DP, Davis G, Aleong R, O'Connor CM, Fiuzat M, Carson PE, Anand IS, Plehn JF, Gottlieb SS, Silver MA, Lindenfeld J, Miller AB, White M, Murphy GA, Sauer W, Bristow MR. Effect of bucindolol on heart failure outcomes and heart rate response in patients with reduced ejection fraction heart failure and atrial fibrillation. Eur J Heart Fail. 2013 Mar;15(3):324-33. doi: 10.1093/eurjhf/hfs181. Epub 2012 Dec 7.
PubMed 23223178Carroll IA, Piccini JP, Steinberg BA, Tzou WS, Richards JC, DeMets DL, Bristow MR. Symptoms Burden as a Clinical Outcomes Assessment in Heart Failure Patients With Atrial Fibrillation. JACC Heart Fail. 2025 Apr;13(4):573-585. doi: 10.1016/j.jchf.2024.08.023. Epub 2024 Nov 20.
PubMed 39570238Piccini JP, Dufton C, Carroll IA, Healey JS, Abraham WT, Khaykin Y, Aleong R, Krueger SK, Sauer WH, Wilton SB, Rienstra M, van Veldhuisen DJ, Anand IS, White M, Camm AJ, Ziegler PD, Marshall D, Bristow MR, Connolly SJ; Genotype-Directed Comparative Effectiveness Trial of Bucindolol and Toprol-XL for Prevention of Atrial Fibrillation/Atrial Flutter in Patients with Heart Failure Trial Investigators*. Bucindolol Decreases Atrial Fibrillation Burden in Patients With Heart Failure and the ADRB1 Arg389Arg Genotype. Circ Arrhythm Electrophysiol. 2021 Aug;14(8):e009591. doi: 10.1161/CIRCEP.120.009591. Epub 2021 Jul 16.
PubMed 34270905Piccini JP, Connolly SJ, Abraham WT, Healey JS, Steinberg BA, Al-Khalidi HR, Dignacco P, van Veldhuisen DJ, Sauer WH, White M, Wilton SB, Anand IS, Dufton C, Marshall DA, Aleong RG, Davis GW, Clark RL, Emery LL, Bristow MR. A genotype-directed comparative effectiveness trial of Bucindolol and metoprolol succinate for prevention of symptomatic atrial fibrillation/atrial flutter in patients with heart failure: Rationale and design of the GENETIC-AF trial. Am Heart J. 2018 May;199:51-58. doi: 10.1016/j.ahj.2017.12.001. Epub 2017 Dec 6.
PubMed 29754666
Study at a glance
From the registry record, last updated by the sponsor on 26 Sep 2022. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- GENETIC-AF - A Genotype-Directed Comparative Effectiveness Trial of Bucindolol and Toprol-XL for Prevention of Symptomatic Atrial Fibrillation/Atrial Flutter in Patients With Heart Failure
- ClinicalTrials.gov ID
- NCT01970501
- Acronym / sponsor ID
- GENETIC-AF / BUC-CLIN-303
- Keywords
- atrial fibrillation, atrial flutter, heart failure, reduced left ventricle ejection fraction, electrical cardioversion, GENETIC-AF, Medtronic, bucindolol
- Phase
- Phase 2
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 267 participants (actual)
- Lead sponsor
- ARCA Biopharma, Inc.Industry (pharma, biotech, devices)
- Collaborators
- Medtronic
- Study start
- Apr 2014
- Primary completion
- 28 Dec 2017 (actual)
- Study completion
- 28 Dec 2017 (actual)
- First posted
- 28 Oct 2013 (estimated)
- Results
- Posted 15 Sep 2022
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
This study is being done to compare the effects of bucindolol hydrochloride (bucindolol) to metoprolol succinate (Toprol-XL) on the recurrence of symptomatic atrial fibrillation/atrial flutter in patients with heart failure who have a specific genotype for the beta-1 adrenergic receptor.
Detailed description
The goal of the GENETIC-AF trial is to demonstrate the superiority of pharmacogenetically targeted bucindolol compared to metoprolol for the prevention of symptomatic atrial fibrillation or atrial flutter in a genotype-defined population with heart failure and/or reduced left ventricular ejection fraction at high risk of atrial fibrillation/atrial flutter recurrence.
Study design
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Quadruple blind (participant, care provider, investigator, outcomes assessor)
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| bucindolol hydrochloride | Experimental | Drug: bucindolol hydrochloridebucindolol hydrochloride (bucindolol) Participants were randomized (1:1) to blinded treatment with bucindolol or metoprolol and titrated weekly to target doses of 50 mg twice daily (BID; < 75 kg) or 100 mg BID (≥ 75 kg) for bucindolol or 200 mg once daily (QD) for metoprolol. 84% of bucindolol participants attained target dose and 72% of metoprolol participants attained target dose. The lowest starting dose of bucindolol was 6.25 mg BID with weekly dose titrations to the weight-based target dose or to the maximum tolerated dose. The starting dose assigned was based on the patient's beta-blocker treatment prior to randomization. Capsules for titration were available in the following dosage strengths to be taken twice daily (with or without food): 6.25mg, 12.5mg, 25mg, 50mg, and 100mg. |
| metoprolol succinate | Active comparator | Drug: metoprolol succinate, Other: Placebo oral capsulemetoprolol succinate (Toprol-XL) Participants were randomized (1:1) to blinded treatment with bucindolol or metoprolol and titrated weekly to target doses of 50 mg twice daily (BID; < 75 kg) or 100 mg BID (≥ 75 kg) for bucindolol or 200 mg once daily (QD) for metoprolol. 84% of bucindolol participants attained target dose and 72% of metoprolol participants attained target dose. The lowest starting dose of metoprolol was 25 mg QD with weekly dose titrations to the target dose or to the maximum tolerated dose. The starting dose assigned was based upon the patient's beta-blocker treatment prior to randomization. Capsules for titration were available in the following dosage strengths to be taken twice daily (with or without food): 25mg, 50mg, 100mg, 200mg and/or matching placebo oral capsule to maintain blinded dosing. |
Who may qualify
- Ages
- 18 to 85 years
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (6 listed)
- Must weigh at least 40 kg
- Possess the β1389 Arg/Arg genotype
- Left Ventricular Ejection Fraction (LVEF) < 0.50 assessed within 12 months prior to Screening
- At least one episode of symptomatic paroxysmal or persistent AF within 180 days of Screening
- Clinically appropriate for electrical cardioversion (ECV) if AF/AFL is present after study drug initiation
Key exclusion criteria (8 listed)
- NYHA Class IV symptoms at the time of Randomization
- Significant fluid overload at Randomization
- Permanent AF at Screening
- More than two previous ECV within 6 months of Randomization or if the most recent ECV failed to produce SR
- Presence of an LVAD, or likely to requirement LVAD placement within 6 months of Randomization
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 |
|---|---|---|
| bucindolol hydrochlorideAlso: bucindolol | Drug | bucindolol hydrochloride |
| metoprolol succinateAlso: Toprol-XL, metoprolol | Drug | metoprolol succinate |
| Placebo oral capsuleAlso: placebo | Other | metoprolol succinate |
Primary outcome
Time to First Event of Symptomatic Atrial Fibrillation/Atrial Flutter (AF/AFL) or All Cause Mortality (ACM) During the 24-week Follow-up Period After Establishment of Stable Sinus Rhythm (SR) on Study Drug [End of Treatment Week 24].
Time frame: end of treatment week 24
Time-to-event is calculated as the date of the event minus the date of initiation of efficacy follow-up, with 1 added in order to include both the start date and end date of the interval. Cox's proportional hazards model will be used to calculate estimated hazard ratios and 95% confidence intervals. The calculations will be performed with the SAS PHREG procedure, with the stratification variables specified in the STRATA statement and the treatment group comparator and any covariates being examined specified in the MODEL statement. For the primary endpoint, the appropriateness of assuming proportional hazards will be explored by the graphing of log (-log(survival function)) over follow-up for each treatment group.
3 secondary outcomes
Time to First Event of Symptomatic or Asymptomatic AF/AFL or ACM During the 24-week Follow-up Period After Establishment of Stable SR on Study Drug [End of Treatment Week 24]
Time frame: end of treatment week 24
Number of Patients With Adequate Ventricular Rate Control During the 24-week Follow-up Period
Time frame: end of treatment week 24
Total Number of Hospitalization Days Per Patient (All-cause) During the Total Study Period (24 Weeks)
Time frame: 24 weeks
Results and safety
Loading the posted results from ClinicalTrials.gov…
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 26 Sep 2022.
- Posted resultsParticipant flow, baseline, all outcome measures and adverse events.
- Background: PubMed 16844790Liggett SB, Mialet-Perez J, Thaneemit-Chen S, Weber SA, Greene SM, Hodne D, Nelson B, Morrison J, Domanski MJ, Wagoner LE, Abraham WT, Anderson JL, Carlquist JF, Krause-Steinrauf HJ, Lazzeroni LC, Port JD, Lavori PW, Bristow MR. A polymorphism within a conserved beta(1)-adrenergic receptor motif alters cardiac function and beta-blocker response in human heart failure. Proc Natl Acad Sci U S A. 2006 Jul 25;103(30):11288-93. doi: 10.1073/pnas.0509937103. Epub 2006 Jul 14.
- Background: PubMed 23071495O'Connor CM, Fiuzat M, Carson PE, Anand IS, Plehn JF, Gottlieb SS, Silver MA, Lindenfeld J, Miller AB, White M, Walsh R, Nelson P, Medway A, Davis G, Robertson AD, Port JD, Carr J, Murphy GA, Lazzeroni LC, Abraham WT, Liggett SB, Bristow MR. Combinatorial pharmacogenetic interactions of bucindolol and beta1, alpha2C adrenergic receptor polymorphisms. PLoS One. 2012;7(10):e44324. doi: 10.1371/journal.pone.0044324. Epub 2012 Oct 10.
- Background: PubMed 24159564Aleong RG, Sauer WH, Davis G, Murphy GA, Port JD, Anand IS, Fiuzat M, O'Connor CM, Abraham WT, Liggett SB, Bristow MR. Prevention of atrial fibrillation by bucindolol is dependent on the beta(1)389 Arg/Gly adrenergic receptor polymorphism. JACC Heart Fail. 2013 Aug;1(4):338-344. doi: 10.1016/j.jchf.2013.04.002.
- Background: PubMed 23223178Kao DP, Davis G, Aleong R, O'Connor CM, Fiuzat M, Carson PE, Anand IS, Plehn JF, Gottlieb SS, Silver MA, Lindenfeld J, Miller AB, White M, Murphy GA, Sauer W, Bristow MR. Effect of bucindolol on heart failure outcomes and heart rate response in patients with reduced ejection fraction heart failure and atrial fibrillation. Eur J Heart Fail. 2013 Mar;15(3):324-33. doi: 10.1093/eurjhf/hfs181. Epub 2012 Dec 7.
- Derived from this study: PubMed 39570238Carroll IA, Piccini JP, Steinberg BA, Tzou WS, Richards JC, DeMets DL, Bristow MR. Symptoms Burden as a Clinical Outcomes Assessment in Heart Failure Patients With Atrial Fibrillation. JACC Heart Fail. 2025 Apr;13(4):573-585. doi: 10.1016/j.jchf.2024.08.023. Epub 2024 Nov 20.
- Derived from this study: PubMed 34270905Piccini JP, Dufton C, Carroll IA, Healey JS, Abraham WT, Khaykin Y, Aleong R, Krueger SK, Sauer WH, Wilton SB, Rienstra M, van Veldhuisen DJ, Anand IS, White M, Camm AJ, Ziegler PD, Marshall D, Bristow MR, Connolly SJ; Genotype-Directed Comparative Effectiveness Trial of Bucindolol and Toprol-XL for Prevention of Atrial Fibrillation/Atrial Flutter in Patients with Heart Failure Trial Investigators*. Bucindolol Decreases Atrial Fibrillation Burden in Patients With Heart Failure and the ADRB1 Arg389Arg Genotype. Circ Arrhythm Electrophysiol. 2021 Aug;14(8):e009591. doi: 10.1161/CIRCEP.120.009591. Epub 2021 Jul 16.
- Derived from this study: PubMed 29754666Piccini JP, Connolly SJ, Abraham WT, Healey JS, Steinberg BA, Al-Khalidi HR, Dignacco P, van Veldhuisen DJ, Sauer WH, White M, Wilton SB, Anand IS, Dufton C, Marshall DA, Aleong RG, Davis GW, Clark RL, Emery LL, Bristow MR. A genotype-directed comparative effectiveness trial of Bucindolol and metoprolol succinate for prevention of symptomatic atrial fibrillation/atrial flutter in patients with heart failure: Rationale and design of the GENETIC-AF trial. Am Heart J. 2018 May;199:51-58. doi: 10.1016/j.ahj.2017.12.001. Epub 2017 Dec 6.
- Individual participant dataSharing planned: No
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.
Jonathan Piccini, MD principal investigator
Duke University
Michael Bristow, MD,PhD study director
ARCA Biopharma, Inc.
97 sites in 6 countries: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A Phase 2 study testing bucindolol hydrochloride and metoprolol succinate in people with Current or Recent History of Atrial Fibrillation, run by ARCA Biopharma, Inc. at 97 sites in 6 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 6 inclusion and 8 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: finished, as of the sponsor's last update on 26 Sep 2022. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 97 sites in United States, Canada, Hungary, Netherlands, Poland and 1 more country. 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. 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 2 studies give the treatment to a larger group to see whether it has the intended effect and to keep checking safety.
Not every study follows the same path, and some studies (observational studies, device studies) have no phase.
Are results available for this study?
Yes. Results are posted in the registry (first posted 15 Sep 2022). A summary is in the For doctors view, and the full results are on ClinicalTrials.gov.
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?
Time to First Event of Symptomatic Atrial Fibrillation/Atrial Flutter (AF/AFL) or All Cause Mortality (ACM) During the 24-week Follow-up Period After Establishment of Stable Sinus Rhythm (SR) on Study Drug [End of Treatment Week 24]. (time frame: end of treatment week 24). 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 NCT01970501, which also lists 7 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 26 Sep 2022.