The Impact of the Routine Aminophylline Administration Following Regadenoson Stress on SPECT Myocardial Perfusion (ASSUAGE-MPI)
The investigators developed a modified regadenoson nuclear stress test of the heart that incorporates an aminophylline injection following regadenoson (The ASSUAGE protocol). The modified (ASSUAGE) protocol has been associated with fewer side effects and was better tolerated by patients.
This study will investigate whether the modified regadenoson stress protocol (ASSUAGE) produces blood flow pattern to the heart similar to that of a standard regadenoson stress protocol. In proven to be the case, the ASSUAGE protocol has the potential to be used on a wide scale instead of the current standard protocol.
|Study Design:||Intervention Model: Single Group Assignment
Masking: Single Blind (Outcomes Assessor)
Primary Purpose: Diagnostic
|Official Title:||The Impact of Routine Administration of Aminophylline Following Regadenoson According to the ASSUAGE Protocol on the Accuracy of Regadenoson Stress Myocardial Perfusion Imaging: A Single-Blinded Cross-Over Clinical Trial|
- Summed Difference Score (SDS); a measure of size and severity of ischemia (heart muscle in jeopardy) detected with regadenoson nuclear stress of the heart (standard vs. ASSUAGE protocol). [ Time Frame: The second (investigational) stress will be performed within 4 weeks from the intial one. ]The SDS produced with standard protocol will be compared to SDS produced with the modified (ASSUAGE) protocol. The study is set out to demonstrate that there is no significant difference in SDS between the two protocols within the same patients.
- Agreement rate in the SDS burden category (normal/mild, moderate or severe) [ Time Frame: within 4 weeks ]Agreement rate in the SDS burden category (normal/mild, moderate or severe)between scan 1 and scan 2 will be compared to the agreement rate between 2 sets of images from scan 1. The study is set out to demonstrate that these agreement rates are not significantly different.
- Agreement rate in the size of blood flow abnormality category (none/small, moderate or large) [ Time Frame: within 4 weeks ]Agreement rate in the SDS burden category (normal/mild, moderate or severe)between scan 1 and scan 2 will be compared to the agreement rate between 2 sets of images from scan 1. The study is set out to demonstrate that these agreement rates are not significantly different.
|Study Start Date:||July 2012|
|Estimated Study Completion Date:||December 2014|
|Estimated Primary Completion Date:||August 2014 (Final data collection date for primary outcome measure)|
Experimental: ASSUAGE Protocol
There is only one arm in this cross-over design trial. Patients who had a standard regadenoson stress test will be invited to enroll in the study. All enrolled subjects will undergo an investigational (ASSUAGE) regadenoson stress test. Imaging scans from the same patients (scan 1 and scan 2) will be compared.
Drug: ASSUAGE Protocol
75 mg of aminophylline injected intravenously 90 seconds following the radioisotope injection in the setting of regadenoson nuclear stress test of the heart.
Other Name: Aminophylline
Please refer to this study by its ClinicalTrials.gov identifier: NCT01655524
|United States, Illinois|
|Rush University Medical Center|
|Chicago, Illinois, United States, 60612|
|Principal Investigator:||Rami Doukky, MD||Rush University Medical Center|