Atrial FibrillationNCT01719367
Genetically Determined Response to Atenolol in Patients With Persistent Atrial Fibrillation
A study testing Atenolol in people with Atrial Fibrillation, run by Vanderbilt University Medical Center at 1 site in United States.
Trial summary
Atrial fibrillation (AF), the most common sustained heart rhythm disorder, is becoming increasingly prevalent in the Western world. The number of people with AF in the United States is projected to roughly double by the year 2050, to an estimated 6-12 million. Read more about this study
- Who is it for?
- Ages 18 years and older
- Conditions the study is for
- Atrial Fibrillation
- What is being tested?
- Atenolol
- Type of treatment
- Pill or oral medicine
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 38 participants
- Where
- 1 siteUnited States
- Study dates
- Jan 2013to Sep 2016
- Phase
- Interventional
- 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 years and older
- All sexes
- No healthy volunteers
- Adult, Older adult
Who may be able to join
- Subjects must be at least 18 years of age.
- Subjects must have a history of persistent AF currently treated with a rate control strategy.
- Subjects should be willing to give written, informed consent.
- Subjects must be willing and able to participate in the exercise protocol.
Who cannot join
- New York Heart Association Class III or IV heart failure.
- A history of heart failure induced by tachy-arrhythmia.
- A history of coronary artery disease and the presence of at least one of the following:
- Canadian Class III or IV angina.
- Recent myocardial infarction, coronary artery bypass grafting, or percutaneous coronary intervention within 6 months.
- Severe renal or hepatic impairment.
Show all 11Show fewer
- Subjects who have a clinically significant allergy/intolerance to atenolol, including a history of beta-blocker induced bronchospasm.
- Females who are pregnant or nursing.
- History of severe AV node dysfunction/pacemaker dependence.
- Subjects who have a systolic blood pressure < 90 mm Hg or resting Ventricular Rate <50 or >120 per minute on the day of the study.
- Patients currently taking Vaughan-Williams Class I or III anti-arrhythmic drugs.
Trial locations and contacts
1 site in 1 country.
United States1 site
Vanderbilt University Medical Center
Nashville, Tennessee, 37232
About this study
Atrial fibrillation (AF), the most common sustained heart rhythm disorder, is becoming increasingly prevalent in the Western world. The number of people with AF in the United States is projected to roughly double by the year 2050, to an estimated 6-12 million. For many patients with AF, rate control with atrioventricular (AV) node blockers is a widely accepted therapeutic strategy. These agents control heart rate, thus preventing symptoms and systolic heart failure associated with tachycardia due to a rapid ventricular response to AF. Beta-blockers are widely accepted as first line agents for rate control in AF, especially when patients have concomitant hypertension (HTN), coronary artery disease, cardiomyopathies, or heart failure (HF). As a class, beta-blockers are among the most commonly prescribed cardiovascular medications.
Among patients with AF treated with beta-blockers, the heart rate (HR) response varies substantially. Sometimes, adequate rate control can be achieved by titration of the beta-blocker dose; but frequently, additional AV nodal blockers and/or digoxin are necessary. In some cases, adequate rate control cannot be achieved even with the simultaneous use of multiple AV nodal blockers, necessitating mechanical ablation of the AV node and permanent pacemaker implantation.
Patient-specific variables that influence the response to beta-blockers include comorbid conditions, weight, age, and level of physical activity. Ethnic differences in the response to beta-blockers for the treatment of HTN and HF are well-described. However, the contribution of genetic variants to beta-blocker efficacy in AF is unknown. We propose to study whether the ADRB1 Gly389Asp SNP reduces response to beta-blockade in subjects with permanent AF.
- Conditions
- Atrial Fibrillation
- Being tested
- Atenolol
- Keywords
- Baseline (pre-atenolol), Post-atenolol
- Medical subject headings
- Atrial Fibrillation
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
AtenololDrug
| Study group | Role | What they receive |
|---|---|---|
| Atenolol | Experimental | Patients will undergo a standardized, graded exercise protocol before and after receiving a dose of oral atenolol. Receives: Drug: Atenolol |
What is being measured
The primary outcome is the main question the study is designed to answer.
Change in Pre- and Post-atenolol Ventricular Rate Response After 5 Minutes of Exercise
After baseline vital signs and ECG are recorded, patients will be asked to perform a baseline standardized (modified Bruce) exercise protocol. Heart rate will be recorded during each stage of the exercise protocol. Patients will be asked to exercise to sub-maximal exertion. After the baseline exercise protocol, patients will be given a single dose of oral atenolol. After a two hour waiting period to allow for peak effect of atenolol, patients will repeat the exercise protocol. The primary study outcome measure will be the difference in pre- and post-atenolol ventricular rate response to exercise. The primary outcome measure will be compared in patients with various polymorphisms in genes that might play a role in the inter-individual response to atenolol.
Measured: after 5minutes of exercise
Change in Pre- and Post-atenolol Ventricular Rate Response After 10 and 15 Minutes of Exercise
After baseline vital signs and ECG are recorded, patients will be asked to perform a baseline standardized (modified Bruce) exercise protocol. Heart rate will be recorded during each stage of the exercise protocol. Patients will be asked to exercise to sub-maximal exertion. After the baseline exercise protocol, patients will be given a single dose of oral atenolol. After a two hour waiting period to allow for peak effect of atenolol, patients will repeat the exercise protocol. The primary study outcome measure will be the difference in pre- and post-atenolol ventricular rate response to exercise. The primary outcome measure will be compared in patients with various polymorphisms in genes that might play a role in the inter-individual response to atenolol.
Measured: after 10 amd 15 minutes of exercise
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted1 Nov 2012 (estimated)
- Study startJan 2013
- Primary completionSep 2016
- Study completionSep 2016
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 (15)Papers the sponsor has linked to this study.
- Other trials for Atrial FibrillationStudies of the same condition, open and under way.
- More trials run by Vanderbilt University Medical CenterThe sponsor's other registered studies.
- 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 N/A
- Primary purpose
- Treatment
- Allocation
- Not applicable
- Intervention model
- Single group
- Masking
- None (open label)
- Enrolment
- 38 participants (actual)
Sponsor and investigators
- Lead sponsor
- Vanderbilt University Medical Center
- Sponsor type
- University, hospital or other
- Responsible party
- Sponsor
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT01719367
- Sponsor's protocol ID
- 130298
- Status last verified
- Jun 2019
- First submitted
- 29 Oct 2012
- Last updated
- 17 Jun 2019
- Results posted
- Yes, on ClinicalTrials.gov
- Data monitoring committee
- No
Publications
European Heart Rhythm Association; Heart Rhythm Society; Fuster V, Ryden LE, Cannom DS, Crijns HJ, Curtis AB, Ellenbogen KA, Halperin JL, Le Heuzey JY, Kay GN, Lowe JE, Olsson SB, Prystowsky EN, Tamargo JL, Wann S, Smith SC Jr, Jacobs AK, Adams CD, Anderson JL, Antman EM, Hunt SA, Nishimura R, Ornato JP, Page RL, Riegel B, Priori SG, Blanc JJ, Budaj A, Camm AJ, Dean V, Deckers JW, Despres C, Dickstein K, Lekakis J, McGregor K, Metra M, Morais J, Osterspey A, Zamorano JL; American College of Cardiology; American Heart Association Task Force on Practice Guidelines; European Society of Cardiology Committee for Practice Guidelines; Writing Committee to Revise the 2001 Guidelines for the Management of Patients With Atrial Fibrillation. ACC/AHA/ESC 2006 guidelines for the management of patients with atrial fibrillation--executive summary: a report of the American College of Cardiology/American Heart Association Task Force on Practice Guidelines and the European Society of Cardiology Committee for Practice Guidelines (Writing Committee to Revise the 2001 Guidelines for the Management of Patients With Atrial Fibrillation). J Am Coll Cardiol. 2006 Aug 15;48(4):854-906. doi: 10.1016/j.jacc.2006.07.009. No abstract available.
PubMed 16904574Go AS, Hylek EM, Phillips KA, Chang Y, Henault LE, Selby JV, Singer DE. Prevalence of diagnosed atrial fibrillation in adults: national implications for rhythm management and stroke prevention: the AnTicoagulation and Risk Factors in Atrial Fibrillation (ATRIA) Study. JAMA. 2001 May 9;285(18):2370-5. doi: 10.1001/jama.285.18.2370.
PubMed 11343485Miyasaka Y, Barnes ME, Gersh BJ, Cha SS, Bailey KR, Abhayaratna WP, Seward JB, Tsang TS. Secular trends in incidence of atrial fibrillation in Olmsted County, Minnesota, 1980 to 2000, and implications on the projections for future prevalence. Circulation. 2006 Jul 11;114(2):119-25. doi: 10.1161/CIRCULATIONAHA.105.595140. Epub 2006 Jul 3.
PubMed 16818816Beta-Blocker Evaluation of Survival Trial Investigators; Eichhorn EJ, Domanski MJ, Krause-Steinrauf H, Bristow MR, Lavori PW. A trial of the beta-blocker bucindolol in patients with advanced chronic heart failure. N Engl J Med. 2001 May 31;344(22):1659-67. doi: 10.1056/NEJM200105313442202.
PubMed 11386264Havlik RJ, Garrison RJ, Fabsitz R, Feinleib M. Variability of heart rate, P-R, QRS and Q-T durations in twins. J Electrocardiol. 1980;13(1):45-8. doi: 10.1016/s0022-0736(80)80008-2.
PubMed 7188949Hanson B, Tuna N, Bouchard T, Heston L, Eckert E, Lykken D, Segal N, Rich S. Genetic factors in the electrocardiogram and heart rate of twins reared apart and together. Am J Cardiol. 1989 Mar 1;63(9):606-9. doi: 10.1016/0002-9149(89)90907-7.
PubMed 2919564Levin MC, Marullo S, Muntaner O, Andersson B, Magnusson Y. The myocardium-protective Gly-49 variant of the beta 1-adrenergic receptor exhibits constitutive activity and increased desensitization and down-regulation. J Biol Chem. 2002 Aug 23;277(34):30429-35. doi: 10.1074/jbc.M200681200. Epub 2002 May 28.
PubMed 12034720Mason DA, Moore JD, Green SA, Liggett SB. A gain-of-function polymorphism in a G-protein coupling domain of the human beta1-adrenergic receptor. J Biol Chem. 1999 Apr 30;274(18):12670-4. doi: 10.1074/jbc.274.18.12670.
PubMed 10212248Sandilands A, Yeo G, Brown MJ, O'Shaughnessy KM. Functional responses of human beta1 adrenoceptors with defined haplotypes for the common 389R>G and 49S>G polymorphisms. Pharmacogenetics. 2004 Jun;14(6):343-9. doi: 10.1097/00008571-200406000-00003.
PubMed 15247626Mialet Perez J, Rathz DA, Petrashevskaya NN, Hahn HS, Wagoner LE, Schwartz A, Dorn GW, Liggett SB. Beta 1-adrenergic receptor polymorphisms confer differential function and predisposition to heart failure. Nat Med. 2003 Oct;9(10):1300-5. doi: 10.1038/nm930. Epub 2003 Sep 14.
PubMed 14502278Liu J, Liu ZQ, Yu BN, Xu FH, Mo W, Zhou G, Liu YZ, Li Q, Zhou HH. beta1-Adrenergic receptor polymorphisms influence the response to metoprolol monotherapy in patients with essential hypertension. Clin Pharmacol Ther. 2006 Jul;80(1):23-32. doi: 10.1016/j.clpt.2006.03.004. Epub 2006 Jun 8.
PubMed 16815314Johnson JA, Zineh I, Puckett BJ, McGorray SP, Yarandi HN, Pauly DF. Beta 1-adrenergic receptor polymorphisms and antihypertensive response to metoprolol. Clin Pharmacol Ther. 2003 Jul;74(1):44-52. doi: 10.1016/S0009-9236(03)00068-7.
PubMed 12844134Small KM, Forbes SL, Rahman FF, Bridges KM, Liggett SB. A four amino acid deletion polymorphism in the third intracellular loop of the human alpha 2C-adrenergic receptor confers impaired coupling to multiple effectors. J Biol Chem. 2000 Jul 28;275(30):23059-64. doi: 10.1074/jbc.M000796200.
PubMed 10801795Lobmeyer MT, Gong Y, Terra SG, Beitelshees AL, Langaee TY, Pauly DF, Schofield RS, Hamilton KK, Herbert Patterson J, Adams KF Jr, Hill JA, Aranda JM Jr, Johnson JA. Synergistic polymorphisms of beta1 and alpha2C-adrenergic receptors and the influence on left ventricular ejection fraction response to beta-blocker therapy in heart failure. Pharmacogenet Genomics. 2007 Apr;17(4):277-82. doi: 10.1097/FPC.0b013e3280105245.
PubMed 17496726Kaab S, Darbar D, van Noord C, Dupuis J, Pfeufer A, Newton-Cheh C, Schnabel R, Makino S, Sinner MF, Kannankeril PJ, Beckmann BM, Choudry S, Donahue BS, Heeringa J, Perz S, Lunetta KL, Larson MG, Levy D, MacRae CA, Ruskin JN, Wacker A, Schomig A, Wichmann HE, Steinbeck G, Meitinger T, Uitterlinden AG, Witteman JC, Roden DM, Benjamin EJ, Ellinor PT. Large scale replication and meta-analysis of variants on chromosome 4q25 associated with atrial fibrillation. Eur Heart J. 2009 Apr;30(7):813-9. doi: 10.1093/eurheartj/ehn578. Epub 2009 Jan 13.
PubMed 19141561
Study at a glance
From the registry record, last updated by the sponsor on 17 Jun 2019. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Genetically Determined Response to Atenolol in Patients With Persistent Atrial Fibrillation
- ClinicalTrials.gov ID
- NCT01719367
- Acronym / sponsor ID
- 130298
- Conditions
- Atrial Fibrillation
- Keywords
- Baseline (pre-atenolol), Post-atenolol
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 38 participants (actual)
- Lead sponsor
- Vanderbilt University Medical CenterUniversity, hospital or other
- Study start
- Jan 2013
- Primary completion
- Sep 2016 (actual)
- Study completion
- Sep 2016 (actual)
- First posted
- 1 Nov 2012 (estimated)
- Results
- Posted 17 Jun 2019
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
Atrial fibrillation (AF), the most common sustained heart rhythm disorder, is becoming increasingly prevalent in the Western world. The number of people with AF in the United States is projected to roughly double by the year 2050, to an estimated 6-12 million. For many patients with AF, rate control with atrioventricular (AV) node blockers is a widely accepted therapeutic strategy. These agents control heart rate, thus preventing symptoms and systolic heart failure associated with tachycardia due to a rapid ventricular response to AF. Beta-blockers are widely accepted as first line agents for rate control in AF, especially when patients have concomitant hypertension (HTN), coronary artery disease, cardiomyopathies, or heart failure (HF). As a class, beta-blockers are among the most commonly prescribed cardiovascular medications.
Among patients with AF treated with beta-blockers, the heart rate (HR) response varies substantially. Sometimes, adequate rate control can be achieved by titration of the beta-blocker dose; but frequently, additional AV nodal blockers and/or digoxin are necessary. In some cases, adequate rate control cannot be achieved even with the simultaneous use of multiple AV nodal blockers, necessitating mechanical ablation of the AV node and permanent pacemaker implantation.
Patient-specific variables that influence the response to beta-blockers include comorbid conditions, weight, age, and level of physical activity. Ethnic differences in the response to beta-blockers for the treatment of HTN and HF are well-described. However, the contribution of genetic variants to beta-blocker efficacy in AF is unknown. We propose to study whether the ADRB1 Gly389Asp SNP reduces response to beta-blockade in subjects with permanent AF.
Study design
- Primary purpose
- Treatment
- Allocation
- Not applicable
- Intervention model
- Single group
- Masking
- None (open label)
- Number of arms
- 1
| Arm | Type | Receives |
|---|---|---|
| Atenolol | Experimental | Drug: AtenololPatients will undergo a standardized, graded exercise protocol before and after receiving a dose of oral atenolol. |
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (4 listed)
- Subjects must be at least 18 years of age.
- Subjects must have a history of persistent AF currently treated with a rate control strategy.
- Subjects should be willing to give written, informed consent.
- Subjects must be willing and able to participate in the exercise protocol.
Key exclusion criteria (11 listed)
- New York Heart Association Class III or IV heart failure.
- A history of heart failure induced by tachy-arrhythmia.
- A history of coronary artery disease and the presence of at least one of the following:
- Severe renal or hepatic impairment.
- Subjects who have a clinically significant allergy/intolerance to atenolol, including a history of beta-blocker induced bronchospasm.
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 |
|---|---|---|
| Atenolol | Drug | Atenolol |
Primary outcome
Change in Pre- and Post-atenolol Ventricular Rate Response After 5 Minutes of Exercise
Time frame: after 5minutes of exercise
After baseline vital signs and ECG are recorded, patients will be asked to perform a baseline standardized (modified Bruce) exercise protocol. Heart rate will be recorded during each stage of the exercise protocol. Patients will be asked to exercise to sub-maximal exertion. After the baseline exercise protocol, patients will be given a single dose of oral atenolol. After a two hour waiting period to allow for peak effect of atenolol, patients will repeat the exercise protocol. The primary study outcome measure will be the difference in pre- and post-atenolol ventricular rate response to exercise. The primary outcome measure will be compared in patients with various polymorphisms in genes that might play a role in the inter-individual response to atenolol.
Change in Pre- and Post-atenolol Ventricular Rate Response After 10 and 15 Minutes of Exercise
Time frame: after 10 amd 15 minutes of exercise
After baseline vital signs and ECG are recorded, patients will be asked to perform a baseline standardized (modified Bruce) exercise protocol. Heart rate will be recorded during each stage of the exercise protocol. Patients will be asked to exercise to sub-maximal exertion. After the baseline exercise protocol, patients will be given a single dose of oral atenolol. After a two hour waiting period to allow for peak effect of atenolol, patients will repeat the exercise protocol. The primary study outcome measure will be the difference in pre- and post-atenolol ventricular rate response to exercise. The primary outcome measure will be compared in patients with various polymorphisms in genes that might play a role in the inter-individual response to atenolol.
Results and safety
Loading the posted results from ClinicalTrials.gov…
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 17 Jun 2019.
- Posted resultsParticipant flow, baseline, all outcome measures and adverse events.
- Background: PubMed 16904574European Heart Rhythm Association; Heart Rhythm Society; Fuster V, Ryden LE, Cannom DS, Crijns HJ, Curtis AB, Ellenbogen KA, Halperin JL, Le Heuzey JY, Kay GN, Lowe JE, Olsson SB, Prystowsky EN, Tamargo JL, Wann S, Smith SC Jr, Jacobs AK, Adams CD, Anderson JL, Antman EM, Hunt SA, Nishimura R, Ornato JP, Page RL, Riegel B, Priori SG, Blanc JJ, Budaj A, Camm AJ, Dean V, Deckers JW, Despres C, Dickstein K, Lekakis J, McGregor K, Metra M, Morais J, Osterspey A, Zamorano JL; American College of Cardiology; American Heart Association Task Force on Practice Guidelines; European Society of Cardiology Committee for Practice Guidelines; Writing Committee to Revise the 2001 Guidelines for the Management of Patients With Atrial Fibrillation. ACC/AHA/ESC 2006 guidelines for the management of patients with atrial fibrillation--executive summary: a report of the American College of Cardiology/American Heart Association Task Force on Practice Guidelines and the European Society of Cardiology Committee for Practice Guidelines (Writing Committee to Revise the 2001 Guidelines for the Management of Patients With Atrial Fibrillation). J Am Coll Cardiol. 2006 Aug 15;48(4):854-906. doi: 10.1016/j.jacc.2006.07.009. No abstract available.
- Background: PubMed 11343485Go AS, Hylek EM, Phillips KA, Chang Y, Henault LE, Selby JV, Singer DE. Prevalence of diagnosed atrial fibrillation in adults: national implications for rhythm management and stroke prevention: the AnTicoagulation and Risk Factors in Atrial Fibrillation (ATRIA) Study. JAMA. 2001 May 9;285(18):2370-5. doi: 10.1001/jama.285.18.2370.
- Background: PubMed 16818816Miyasaka Y, Barnes ME, Gersh BJ, Cha SS, Bailey KR, Abhayaratna WP, Seward JB, Tsang TS. Secular trends in incidence of atrial fibrillation in Olmsted County, Minnesota, 1980 to 2000, and implications on the projections for future prevalence. Circulation. 2006 Jul 11;114(2):119-25. doi: 10.1161/CIRCULATIONAHA.105.595140. Epub 2006 Jul 3.
- Background: PubMed 11386264Beta-Blocker Evaluation of Survival Trial Investigators; Eichhorn EJ, Domanski MJ, Krause-Steinrauf H, Bristow MR, Lavori PW. A trial of the beta-blocker bucindolol in patients with advanced chronic heart failure. N Engl J Med. 2001 May 31;344(22):1659-67. doi: 10.1056/NEJM200105313442202.
- Background: PubMed 7188949Havlik RJ, Garrison RJ, Fabsitz R, Feinleib M. Variability of heart rate, P-R, QRS and Q-T durations in twins. J Electrocardiol. 1980;13(1):45-8. doi: 10.1016/s0022-0736(80)80008-2.
- Background: PubMed 2919564Hanson B, Tuna N, Bouchard T, Heston L, Eckert E, Lykken D, Segal N, Rich S. Genetic factors in the electrocardiogram and heart rate of twins reared apart and together. Am J Cardiol. 1989 Mar 1;63(9):606-9. doi: 10.1016/0002-9149(89)90907-7.
- Background: PubMed 12034720Levin MC, Marullo S, Muntaner O, Andersson B, Magnusson Y. The myocardium-protective Gly-49 variant of the beta 1-adrenergic receptor exhibits constitutive activity and increased desensitization and down-regulation. J Biol Chem. 2002 Aug 23;277(34):30429-35. doi: 10.1074/jbc.M200681200. Epub 2002 May 28.
- Background: PubMed 10212248Mason DA, Moore JD, Green SA, Liggett SB. A gain-of-function polymorphism in a G-protein coupling domain of the human beta1-adrenergic receptor. J Biol Chem. 1999 Apr 30;274(18):12670-4. doi: 10.1074/jbc.274.18.12670.
- Background: PubMed 15247626Sandilands A, Yeo G, Brown MJ, O'Shaughnessy KM. Functional responses of human beta1 adrenoceptors with defined haplotypes for the common 389R>G and 49S>G polymorphisms. Pharmacogenetics. 2004 Jun;14(6):343-9. doi: 10.1097/00008571-200406000-00003.
- Background: PubMed 14502278Mialet Perez J, Rathz DA, Petrashevskaya NN, Hahn HS, Wagoner LE, Schwartz A, Dorn GW, Liggett SB. Beta 1-adrenergic receptor polymorphisms confer differential function and predisposition to heart failure. Nat Med. 2003 Oct;9(10):1300-5. doi: 10.1038/nm930. Epub 2003 Sep 14.
- Background: PubMed 16815314Liu J, Liu ZQ, Yu BN, Xu FH, Mo W, Zhou G, Liu YZ, Li Q, Zhou HH. beta1-Adrenergic receptor polymorphisms influence the response to metoprolol monotherapy in patients with essential hypertension. Clin Pharmacol Ther. 2006 Jul;80(1):23-32. doi: 10.1016/j.clpt.2006.03.004. Epub 2006 Jun 8.
- Background: PubMed 12844134Johnson JA, Zineh I, Puckett BJ, McGorray SP, Yarandi HN, Pauly DF. Beta 1-adrenergic receptor polymorphisms and antihypertensive response to metoprolol. Clin Pharmacol Ther. 2003 Jul;74(1):44-52. doi: 10.1016/S0009-9236(03)00068-7.
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Atrial Fibrillation (AF)
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.
The record lists no contact. Use the official record to reach the sponsor.
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing Atenolol in people with Atrial Fibrillation, run by Vanderbilt University Medical Center at 1 site in United States.
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 4 inclusion and 11 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 17 Jun 2019. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in United States. 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.
Are results available for this study?
Yes. Results are posted in the registry (first posted 17 Jun 2019). 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?
Change in Pre- and Post-atenolol Ventricular Rate Response After 5 Minutes of Exercise (time frame: after 5minutes of exercise). 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 NCT01719367, which also lists 15 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 17 Jun 2019.