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Integrated Dual Exercise and Lexiscan Positron Emission Tomography: IDEALPET (IDEALPET)

This study has been completed.
Information provided by (Responsible Party):
Sharmila Dorbala, MBBS, Brigham and Women's Hospital Identifier:
First received: April 16, 2010
Last updated: July 11, 2017
Last verified: July 2017
This is a single-center study of subjects undergoing clinically indicated heart scans for evaluation of known or suspected heart disease. We will also include 10 healthy subjects without known heart disease. We would like to study stress testing of the heart using exercise and a medication called regadenoson. Imaging of the heart will be performed.

Condition Intervention Phase
Coronary Artery Disease Drug: Exercise plus Regadenoson (Lexercise) Drug: Regadenoson (Lexiscan) Phase 4

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)
Primary Purpose: Diagnostic
Official Title: Integrated Dual Exercise and Lexiscan PET: IDEAL PET

Resource links provided by NLM:

Further study details as provided by Sharmila Dorbala, MBBS, Brigham and Women's Hospital:

Primary Outcome Measures:
  • Safety and tolerability of combined exercise and regadenoson stress [ Time Frame: 1 hour ]

    Safety and tolerability of combined standard Bruce exercise stress testing combined with regadenoson infusion will be studied.

    • Side effects, ECG changes, blood pressure changes, will be recorded during Lexercise and compared to Lexiscan study.
    • Safety blood work will be drawn after the Lexercise PET study.
    • Radiation dose to the staff will be measured using personal dosimeters after the Lexiscan as well as the Lexercise PET study.

Secondary Outcome Measures:
  • Image Quality [ Time Frame: 1 hour ]

    Image quality: The following parameters will be measured in the Lexiscan study and compared to the Lexercise study

    • Motion artifacts
    • Image registration
    • Sub diaphragmatic activity (liver heart ratios)
    • Defect contrast
    • Signal to noise ratio and
    • Dynamic image evaluability will be assessed

  • Diagnostic Value [ Time Frame: 1 hour ]
    • Defect size, severity, extent and contrast with Lexiscan alone will be compared to exercise Lexiscan protocol
    • Left ventricular ejection fraction at rest and immediately post stress with Lexiscan alone will be compared to the Lexercise protocol.
    • Myocardial blood flow estimates and coronary flow reserve will be compared between the Lexiscan alone and Lexercise protocols.
    • Comparison to coronary angiography results when available.

Enrollment: 41
Study Start Date: February 2011
Study Completion Date: June 6, 2017
Primary Completion Date: June 6, 2017 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Active Comparator: Regadenoson (Lexiscan)
Regadenoson Rubidium-82 Positron Emission Tomography
Drug: Regadenoson (Lexiscan)
Regadenoson Rubidium-82 Positron Emission Tomography
Experimental: Exercise + Regadenoson (Lexiscan)
Exercise plus Regadenoson (Lexiscan) Rubidium-82 Positron Emission Tomography
Drug: Exercise plus Regadenoson (Lexercise)
Standard Bruce exercise stress test with regadenoson injection at maximal stress with Rubidium-82 Positron Emission Tomography

Detailed Description:

Regadenoson is stress agent approved by the FDA for use with myocardial perfusion imaging with technetium-99m single photon emission computed tomography (SPECT) in patients that are unable to exercise adequately. We would like to study Regadenoson in conjunction with Exercise Rubidium-82 positron emission tomography myocardial perfusion imaging (PET MPI). Regadenoson is not approved by FDA for use with Rubidium-82 PET MPI. Also, we would like to study a novel stress protocol of Regadenoson combined with symptom limited exercise stress (not FDA approved).

The objectives of this study are to assess the tolerability and safety of combined symptom limited exercise stress test with Lexiscan (Lexercise PET) compared to Lexiscan alone (Lexiscan PET), to assess image quality of Lexercise compared to Lexiscan PET and to compare relative and absolute myocardial perfusion imaging with Lexercise compared to Lexiscan PET to identify CAD.


Ages Eligible for Study:   18 Years to 90 Years   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • Age > 18 years
  • Clinically indicated N-13 ammonia PET study or ten healthy volunteers
  • Known coronary artery disease (prior percutaneous coronary intervention, prior coronary artery bypass surgery or Q wave MI on ECG) or intermediate to high pretest likelihood of CAD
  • Able to exercise on a treadmill
  • Able and willing to provide informed consent to participate in the study

Exclusion Criteria:

  • Contraindications to exercise stress testing such as, unstable angina, known severe left main coronary artery stenosis, severe heart failure, uncontrolled arrhythmias, symptomatic hypotension or severe hypertension (systolic blood pressure < 90 or > 200 mmHg, respectively), or > 1st degree atrioventricular block in the absence of a functioning pacemaker.
  • Subject requires emergent cardiac medical intervention or catheterization after the clinical study.
  • Documented myocardial infarction (MI) ≤ 30 days prior to enrollment.
  • History of percutaneous coronary intervention (PCI) ≤ 4weeks prior to enrollment.
  • History of coronary artery bypass graft (CABG) ≤ 8 weeks prior to enrollment.
  • History of heart transplantation.
  • Allergy or intolerance to aminophylline or regadenoson
  • Known severe or oxygen dependent bronchoconstrictive or bronchospastic lung disease [e.g., asthma, wheezing, chronic obstructive pulmonary disease (COPD), etc.].
  • Severe LV dysfunction, with ejection fraction of < 30%
  • Serious non-cardiac medical illness (e.g., disseminated malignancy, severe neurological dysfunction at time of baseline PET study) or a social situation which will preclude research study participation
  • History of Seizures.
  Contacts and Locations
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Please refer to this study by its identifier: NCT01109992

United States, Massachusetts
Brigham and Womens' Hospital
Boston, Massachusetts, United States, 02421
Sponsors and Collaborators
Brigham and Women's Hospital
Principal Investigator: Sharmila Dorbala, MBBS Brigham and Women's Hospital
  More Information

Klocke FJ, Baird MG, Lorell BH, Bateman TM, Messer JV, Berman DS, O'Gara PT, Carabello BA, Russell RO Jr, Cerqueira MD, St John Sutton MG, DeMaria AN, Udelson JE, Kennedy JW, Verani MS, Williams KA, Antman EM, Smith SC Jr, Alpert JS, Gregoratos G, Anderson JL, Hiratzka LF, Faxon DP, Hunt SA, Fuster V, Jacobs AK, Gibbons RJ, Russell RO; American College of Cardiology; American Heart Association Task Force on Practice Guidelines; American Society for Nuclear Cardiology. ACC/AHA/ASNC guidelines for the clinical use of cardiac radionuclide imaging--executive summary: a report of the American College of Cardiology/American Heart Association Task Force on Practice Guidelines (ACC/AHA/ASNC Committee to Revise the 1995 Guidelines for the Clinical Use of Cardiac Radionuclide Imaging). Circulation. 2003 Sep 16;108(11):1404-18.

Responsible Party: Sharmila Dorbala, MBBS, Director, Nuclear Cardiology, Brigham and Women's Hospital Identifier: NCT01109992     History of Changes
Other Study ID Numbers: BWH
Study First Received: April 16, 2010
Last Updated: July 11, 2017

Keywords provided by Sharmila Dorbala, MBBS, Brigham and Women's Hospital:
coronary artery disease
positron emission tomography

Additional relevant MeSH terms:
Coronary Artery Disease
Myocardial Ischemia
Coronary Disease
Heart Diseases
Cardiovascular Diseases
Arterial Occlusive Diseases
Vascular Diseases
Adenosine A2 Receptor Agonists
Purinergic P1 Receptor Agonists
Purinergic Agonists
Purinergic Agents
Neurotransmitter Agents
Molecular Mechanisms of Pharmacological Action
Physiological Effects of Drugs processed this record on September 21, 2017