Genetically Determined Response to Atenolol in Patients With Persistent Atrial Fibrillation

NCT01719367 | Completed Results

• 1 other identifier: 130298
• Study Type: interventional
• Target: 38
• Locations: 1 country
• Sites: 1

Brief 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. 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

Keywords

Baseline (pre-atenolol); Post-atenolol

Outcome Measures

Primary Outcomes (2)

• 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.

  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.

  after 10 amd 15 minutes of exercise

Study Arms (1)

Atenolol

EXPERIMENTAL

Patients will undergo a standardized, graded exercise protocol before and after receiving a dose of oral atenolol.

Drug: Atenolol

Interventions

Atenolol DRUG

Atenolol

Eligibility Criteria

• Age: 18 Years+
• Sex: all
• Healthy Volunteers: No
• Age Groups: Adult (18-64), Older Adult (65+)

You may qualify if:

• 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.

You may not qualify if:

• 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.
• 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.

Sponsors & Collaborators

• Vanderbilt University Medical Center: lead

Study Sites (1)

Vanderbilt University Medical Center

Nashville, Tennessee, 37232, United States

Location

Related Publications (15)

• 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.

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  PMID: 7188949 BACKGROUND

• Hanson 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.

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  PMID: 10212248 BACKGROUND

• Sandilands 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.

  PMID: 15247626 BACKGROUND

• Mialet 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.

  PMID: 14502278 BACKGROUND

• Liu 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.

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• Lobmeyer 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.

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• Kaab 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.

  PMID: 19141561 BACKGROUND

MeSH Terms

Conditions

Atrial Fibrillation

Interventions

Atenolol

Condition Hierarchy (Ancestors)

Arrhythmias, Cardiac; Heart Diseases; Cardiovascular Diseases; Pathologic Processes; Pathological Conditions, Signs and Symptoms

Intervention Hierarchy (Ancestors)

Phenoxypropanolamines; Propanolamines; Amino Alcohols; Alcohols; Organic Chemicals; Propanols; Amines

Results Point of Contact

• Title: Matthew Kolek, MD
• Organization: Florida Electrophysiology Associates

info@heartrhythmexperts.com

(561) 434-0353

Publication Agreements

• PI is Sponsor Employee: Yes

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: NA
• Masking: NONE
• Purpose: TREATMENT
• Intervention Model: SINGLE GROUP
• Sponsor Type: OTHER
• Responsible Party: SPONSOR

Study Record Dates

• First Submitted: October 29, 2012
• First Posted: November 1, 2012
• Study Start: January 1, 2013
• Primary Completion: September 1, 2016
• Study Completion: September 1, 2016
• Last Updated: June 17, 2019
• Results First Posted: June 17, 2019

Record last verified: 2019-06

Locations

US (1)