Journal of Nuclear Cardiology

, Volume 15, Issue 3, pp 329–336 | Cite as

Safety of regadenoson, an adenosine A2A receptor agonist for myocardial perfusion imaging, in mild asthma and moderate asthma patients: A randomized, double-blind, placebo-controlled trial

  • Brian R. Leaker
  • B. O’Connor
  • Trevor T. Hansel
  • Peter J. Barnes
  • Lixen Meng
  • Vandana S. Mathur
  • Hsiao D. Lieu
Original Articles

Abstract

Background. Patients with reactive airways are at risk for adenosine-induced bronchocon-striction, mediated via A2B and/or A3 adenosine receptors.

Methods and Results. To examine the effects of regadenoson, a selective adenosine A2A receptor agonist, on airway resistance, we conducted a randomized, double-blind, placebo-controlled crossover trial in asthmatic patients with a positive adenosine monophosphate challenge test. The mean ratio of the forced expiratory volume in 1 second (FEV1) at each tested time point relative to the baseline FEV1 was significantly higher after treatment with regadenoson compared with placebo from 10 to 60 minutes after treatment. One patient had a substantial but asymptomatic FEV1 reduction (−36.2%) after regadenoson that reversed spontaneously. The most common adverse events with regadenoson were tachycardia (66%), dizziness (53%), headache (45%), and dyspnea (34%). The mean heart rate significantly increased with regadenoson (maximum of +10.4 beats/min) versus placebo.

Conclusions. In this pilot safety study of 48 patients with mild or moderate asthma who had bronchial reactivity to adenosine monophosphate, regadenoson was safe and well tolerated.

Key Words

Reactive airways spirometry pulmonary function test stress test adenosine receptor 

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Copyright information

© American Society of Nuclear Cardiology 2003

Authors and Affiliations

  • Brian R. Leaker
    • 1
  • B. O’Connor
    • 1
  • Trevor T. Hansel
    • 1
  • Peter J. Barnes
    • 1
  • Lixen Meng
    • 2
  • Vandana S. Mathur
    • 3
  • Hsiao D. Lieu
    • 3
  1. 1.From the Pulmonology, Heart and Lung CentreLondonEngland
  2. 2.BiostatisticsCV TherapeuticsPalo Alto
  3. 3.Clinical ResearchCV TherapeuticsPalo Alto

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