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Early Detection of Drug-Induced Renal Hemodynamic Dysfunction Using Sonographic Technology in Rats
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Regadenoson.

G M Bengalorkar1, K Bhuvana, N Sarala

  • 1Department of Pharmacology, Sri Devaraj Urs Medical College, Tamaka, Kolar, Karnataka, India.

Journal of Postgraduate Medicine
|June 22, 2012
PubMed
Summary
This summary is machine-generated.

Regadenoson is a pharmacological stress agent for myocardial perfusion imaging (MPI) when exercise is not possible. This adenosine receptor agonist offers comparable efficacy to adenosine with fewer side effects.

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Area of Science:

  • Cardiology
  • Nuclear Medicine
  • Pharmacology

Background:

  • Myocardial perfusion imaging (MPI) assesses heart blood flow using single-photon emission computerized tomography.
  • Pharmacological stress agents are crucial for MPI when exercise stress testing is contraindicated.
  • Regadenoson, a selective A2A adenosine receptor agonist, is utilized for pharmacological stress in MPI.

Purpose of the Study:

  • To evaluate the role and characteristics of regadenoson as a pharmacological stress agent in myocardial perfusion imaging.
  • To compare the efficacy and side effect profile of regadenoson with adenosine.

Main Methods:

  • Regadenoson administration involves a single bolus dose of 400 μg.
  • Pharmacokinetic analysis shows peak plasma concentration (Cmax) of 13.6 ng/mL within 1-4 minutes and a terminal half-life of 2 hours.
  • Mechanism involves A2A receptor agonism, leading to coronary vasodilation via increased cAMP and potassium channel opening.

Main Results:

  • Regadenoson achieves rapid onset and short duration, suitable for inducing hyperemia.
  • It demonstrates comparable efficacy to adenosine for MPI.
  • Regadenoson is associated with fewer adverse effects compared to adenosine.

Conclusions:

  • Regadenoson is an effective and well-tolerated pharmacological stress agent for MPI.
  • Its favorable side effect profile and pharmacokinetic properties make it suitable for patients with contraindications to exercise stress, including those with mild-to-moderate reactive airway disease, obstructive lung disease, and renal impairment.