Beta-blockers in i-PAH

NCT ID: NCT01246037

Last Updated: 2014-01-14

Basic Information

• Recruitment Status: UNKNOWN
• Clinical Phase: PHASE1/PHASE2
• Total Enrollment: 30 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2011-02-28
• Study Completion Date: 2014-04-30

Brief Summary

The main question of this study is: 'Is selective beta-blocker treatment safe and effective in reducing sympathetic overdrive, thereby improving RV function and remodeling in patients with iPAH?'.

In addition to the determination of RVEF, the investigators will explore how beta-blocker therapy affects sympathetic overdrive, remodeling of the RV, single beat elastance, exercise capacity and mechanical efficiency.

30 iPAH patients will be randomized to either Bisoprolol- or placebo-treatment in a double-blinded fashion. A cross-over trial design will be used to increase the power of the study and to assess long-term effects of Bisoprolol-treatment and -withdrawal. The medication will be given in an escalating dose regimen (as described in the 'farmacotherapeutisch kompas', www.fk.cvz.nl) and treatment will be monitored along the guidelines of the American Heart Association.

Detailed Description

This is a clinical study aimed to provide a proof of concept of the safety and efficacy of beta-blocker treatment in PAH-associated right ventricular failure.

The protocol of the proposed double blinded cross over design.

The reasons for not choosing an initial open phase 1 study, but to start directly with a placebo controlled study are:

1. Although the drug is considered contraindicated in the studied patient population, it is very common for PAH patients to receive beta-blocker therapy in an uncontrolled way; without reports of serious side effects until now

2. Dose titration in the study will be performed on the basis of side-effects and at this moment the investigators cannot predict the optimal dose which is both safe and efficacious. Therefore, safety assessment can only be performed in combination with the assessment of pharmaceutical effectiveness.

After obtaining informed consent, 30 idiopathic PAH patients (NYHA II-III) will be randomly assigned to either the placebo group or beta-blocker therapy. For the randomization and study blinding the investigators will use a VUMC computer based procedure in close collaboration with the VUMC pharmacy.

In the first 4 months of study, the dose of the drug will be gradually increased; the titration scheme is based on the 'farmacotherapeutisch kompas' (described below) and monitored according to the ACC/AHA/ESC guidelines. Up titration will be performed under the responsibilities of an experienced heart failure cardiologist and pulmonologist.

MEASUREMENTS Time points 1, 3 and 5 (6 months periods): this includes a complete assessment of the patient

• Clinical assessment: physical examination, NYHA class, ECG, routine lab including NT-proBNP and urine tests for proteinuria.
• Imaging of right ventricular function: the primary measure of this study will be right ventricular ejection fraction measured by means of MRI. Additional MRI and echocardiographic measurements will be performed. (the complete study protocols are added as supplements).
• Right Heart Catheterization (performed under local anesthesia): Measurements of pressures in the pulmonary artery, right ventricle and right atrium, while patients are breathing room air and at end-expiration.
• Exercise capacity by means of a maximal incremental cycle testing (CardioPulmonary Exercise Test) to measure maximal work load, VO2 max, anaerobic threshold, heart rate response, oxygen pulse and ventilatory efficiency. And by means of 6 minute walking distance.
• Heart Rate Variability (HRV)
• Nuclear scanning: a comprised PET protocol will be performed to measure 11C-acetaat, oxygen-15-labeled water (H215O) and ¹¹C-HED uptake in the right ventricle. A summary of the protocol is added as a supplement.

UP-TITRATION PHASE (first 4 months; either on placebo or Bisoprolol): patients will be monitored every second week under supervision of an experienced pulmonologist, specialized in PAH, and a cardiologist, specialized in chronic heart failure during a visit to the outpatient clinic. If no contra-indications are found the dose will be increased to the next step.

The investigators will start with a dosage of 1,25 mg Bisoprolol once daily. Every two weeks dosage is increased by 1,25 mg, until maximum dosage of 10 mg once a day is reached, or as high as tolerated by the patient.

Increasing the dosage will be stopped, or if needed the dosage will be reduced, in case of:

• systolic systemic pressure < 90 mmHg
• clinical progression in heart failure
• clinically relevant bradycardia or <60b/min
• progression of complaints
• drop in 6 minute walk distance > 15% The titration procedure for the placebo will be the same as for titration of Bisoprolol. The dosage of the medication will be altered for maximal four months and after this the patients will use a stable dose for the rest of the six month period.

Every clinical visit will at least contain a clinical assessment, assessment of NYHA class, 6 minute walk distance, ECG and a Minnesota quality of life questionnaire. Every fourth week NT-proBNP, kidney- and liver functions will be assessed. In addition, the patient will be instructed to use a diary to record his/her symptoms and body weight.

STABLE PHASE: It is expected that up to 4 months are required to reach an acceptable dose of Bisoprolol. After this up-titration phase, the patient will be followed closely during the remaining part of the six month period, using a stable medication dose. The monitoring includes continuation of the diary, monthly visits to the outpatient clinic including the measurements as described in the up-titration phase and a telephone call every 4 weeks in between office visits.

CROSS OVER After six months new measurements will be done. Thereafter the medication will be tapered down in a two week period and than finally stopped. This will be done to prevent the patients for possible side effects (rebound tachycardia) of stopping their medication. The same tapering down procedure will be performed after the third set of measurements.

Conditions

Idiopathic Pulmonary Arterial Hypertension

Study Design

• Allocation Method: RANDOMIZED
• Intervention Model: CROSSOVER
• Primary Study Purpose: TREATMENT
• Blinding Strategy: QUADRUPLE

Study Groups

First placebo

First half year placebo, second half year bisoprolol

Group Type: EXPERIMENTAL

Bisoprolol

Intervention Type: DRUG

In the first 4 months of study, the dose of the drug will be gradually increased; the titration scheme is based on the 'farmacotherapeutisch kompas' and monitored according to the ACC/AHA/ESC guidelines. Up titration will be performed under the responsibilities of an experienced heart failure cardiologist and pulmonologist.

First Bisoprolol

First half year bisoprolol, second half year placebo

Group Type: EXPERIMENTAL

Bisoprolol

Intervention Type: DRUG

In the first 4 months of study, the dose of the drug will be gradually increased; the titration scheme is based on the 'farmacotherapeutisch kompas' and monitored according to the ACC/AHA/ESC guidelines. Up titration will be performed under the responsibilities of an experienced heart failure cardiologist and pulmonologist.

Interventions

Bisoprolol

In the first 4 months of study, the dose of the drug will be gradually increased; the titration scheme is based on the 'farmacotherapeutisch kompas' and monitored according to the ACC/AHA/ESC guidelines. Up titration will be performed under the responsibilities of an experienced heart failure cardiologist and pulmonologist.

Intervention Type: DRUG

Eligibility Criteria

Inclusion Criteria

• Idiopathic PAH patients
• Stable on PAH specific treatment defined

• No change in PAH specific treatment in the past 6 months
• No change in functional class in the past 6 months
• <10 % change in 6 minute walk distance in the past 6 months
• Functional class 2 or 3
• In sinus rhythm

Exclusion Criteria

• History of systemic hypertension, ischaemic heart disease, valvular disease or cardiomyopathy.
• Asthma
• Use of concomitant medication other than diuretics, Acenocoumarol and PAH targeted therapy
• History of cardiac arrhythmias or the use of anti-arrhythmic drugs
• Sick sinus syndrome
• systolic hypotension < 90 mmHg
• AV-block
• Clinically relevant sinus-bradycardia

• Minimum Eligible Age: 18 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: No

Sponsors

ZonMw: The Netherlands Organisation for Health Research and Development

OTHER

Sponsor Role: collaborator

Amsterdam UMC, location VUmc

OTHER

Sponsor Role: lead

Responsible Party

A. Vonk Noordegraaf

Prof. dr.

Responsibility Role: PRINCIPAL_INVESTIGATOR

Principal Investigators

Anton Vonk Noordegraaf, Prof. MD PhD

Role: PRINCIPAL_INVESTIGATOR

VU University Medical Center, pulmonary department

Locations

VUmc

Amsterdam, , Netherlands

Countries

Netherlands

References

van Campen JS, de Boer K, van de Veerdonk MC, van der Bruggen CE, Allaart CP, Raijmakers PG, Heymans MW, Marcus JT, Harms HJ, Handoko ML, de Man FS, Vonk Noordegraaf A, Bogaard HJ. Bisoprolol in idiopathic pulmonary arterial hypertension: an explorative study. Eur Respir J. 2016 Sep;48(3):787-96. doi: 10.1183/13993003.00090-2016. Epub 2016 Jul 7.

Reference Type: DERIVED

PMID: 27390285 (View on PubMed)

Other Identifiers

2010-262

Identifier Type: -

Identifier Source: org_study_id