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Attenuation of the Side Effect Profile of Regadenoson: Study With Aminophylline in Patients Undergoing Myocardial Perfusion Imaging (ASSUAGE)

This study has been completed.
Information provided by (Responsible Party):
Rami Doukky, Rush University Medical Center Identifier:
First received: November 29, 2010
Last updated: November 27, 2012
Last verified: November 2012
The routine administration of 75 mg of intravenous aminophylline following regadenoson (Lexiscan®), a commonly used medication for nuclear stress testing of the heart, can reduce the gastrointestinal (diarrhea and stomach upset) and other side effects related to regadenoson.

Condition Intervention Phase
Patients Being Assessed With Nuclear Stress Testing of the Heart Using the Stress Agent Regadenoson (Lexiscan ®).
Drug: Aminophylline
Drug: Placebo
Phase 4

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double Blind (Participant, Care Provider, Investigator, Outcomes Assessor)
Primary Purpose: Prevention
Official Title: Attenuation of the Side Effect Profile of Regadenoson: A Randomized Double-Blind Placebo Controlled Study With Aminophylline in Patients Undergoing Myocardial Perfusion Imaging.

Resource links provided by NLM:

Further study details as provided by Rami Doukky, Rush University Medical Center:

Primary Outcome Measures:
  • Composite endpoints of abdominal cramps and diarrhea. [ Time Frame: within 2 hours from the intervention. ]
    Patients will be surveyed for these symptoms following to the completion of the cardiac stress testing procedure and prior to discharge from the laboratory.

Secondary Outcome Measures:
  • Global symptomatic burden of regadenoson [ Time Frame: within 2 hours from the intervention. ]
    Secondary end-point encompasses the sum of all regadenoson-related adverse-events of flushing, feeling hot, chest pain, chest discomfort, angina, headache, dizziness, abdominal cramps or discomfort, diarrhea, nausea, bronchospasm and the need to administer a clinically indicated aminophylline to treat suspected regadenoson related side effects.

Enrollment: 248
Study Start Date: November 2010
Study Completion Date: September 2011
Primary Completion Date: September 2011 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: Aminophylline
75 mg of intravenous aminophylline.
Drug: Aminophylline
75 mg of intravenous aminophylline
Placebo Comparator: Placebo
Matching normal saline placebo (sterile salt water).
Drug: Placebo
Matching 0.9 Normal Saline (sterile salt water)administered intravenously.

Detailed Description:
Approximately 250 patients who are referred for a nuclear stress testing of the heart with regadenoson (Lexiscan®) will be recruited to participate in the study. Following regadenoson (administered as part of a stress routine test protocol) participants will receive either aminophylline (75 mg - intravenously) or a matching inactive placebo (sterile salt water) injection. Participants will be surveyed for gastrointestinal symptoms and other side effects related to regadenoson. The frequency and severity of such side effects will be compared between the two study groups (aminophylline vs. placebo).

Ages Eligible for Study:   18 Years and older   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Adult patients referred to undergo a clinically-indicated regadenoson-stress myocardial perfusion imaging at Rush University Medical Center

Exclusion Criteria:

  • Patient refusal to participate
  • Known allergic reaction to aminophylline.
  • Pre-existing headache or acute/subacute GI illness with symptoms of diarrhea, abdominal discomfort, nausea or vomiting.
  • Any contraindication to aminophylline: hypotension, unstable cardiac arrhythmias and acute coronary symptoms.
  • Uncontrolled seizure disorder defined as more than 2 seizure episodes in the past 12 months or any seizure in the past week.
  • Pregnant or breast-feeding women.
  • Patients receiving anti-platelet agent dipyridamole (Persantine® or Aggrenox®).
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Please refer to this study by its identifier: NCT01250496

United States, Illinois
Rush University Medical Center
Chicago, Illinois, United States, 60612
Sponsors and Collaborators
Rush University Medical Center
  More Information

Publications automatically indexed to this study by Identifier (NCT Number):
Responsible Party: Rami Doukky, Director of Nuclear Cardiology and Stress Testing Laboratories, Rush University Medical Center Identifier: NCT01250496     History of Changes
Other Study ID Numbers: ASSUAGETrial
Study First Received: November 29, 2010
Last Updated: November 27, 2012

Keywords provided by Rami Doukky, Rush University Medical Center:
Myocardial Perfusion Imaging
pharmacologic stress test

Additional relevant MeSH terms:
Adenosine A2 Receptor Agonists
Purinergic P1 Receptor Agonists
Purinergic Agonists
Purinergic Agents
Neurotransmitter Agents
Molecular Mechanisms of Pharmacological Action
Physiological Effects of Drugs
Bronchodilator Agents
Autonomic Agents
Peripheral Nervous System Agents
Anti-Asthmatic Agents
Respiratory System Agents
Cardiotonic Agents
Phosphodiesterase Inhibitors
Enzyme Inhibitors
Purinergic P1 Receptor Antagonists
Purinergic Antagonists
Protective Agents processed this record on May 25, 2017