Myocardial Ischemia
Conditions
Keywords
Echocardiography, 2D, speckle tracking, Lexiscan, regadenoson, Myocardial ischemia, Myocardial perfusion imaging, cost and cost analysis, Cardiac-Gated SPECT Imaging, Echocardiography
Brief summary
This study is for people who have a SPECT scan (nuclear imaging of the blood flow to the heart muscle) ordered by their medical doctors. As part of the SPECT scan, they will have been given a drug called regadenoson to widen and expand the blood vessels bringing blood to the heart muscle. The SPECT pictures of the heart are taken about an hour after the regadenoson is put into an arm vein through an IV. In this study, additional echo pictures will be taken and compared to the SPECT pictures. The aim of the study is to see if the echo pictures work as well as SPECT to measure the blood flow to the heart muscle.
Detailed description
This is a single center, prospective, non-randomized, comparative, same-setting study of Lexiscan MPI SPECT versus state-of-the-art echocardiography. Lexiscan SPECT MPI will be performed per routine clinical protocol with Lexiscan administered as per package insert (0.4 mg in 5 ml IV push over 10 seconds followed by a 5 ml saline flush). Simultaneous echo/Doppler will be obtained immediately before (baseline), during and immediately post (peak vasodilation) using conventional techniques.
Interventions
DRUGNo intervention
No intervention
Sponsors
Astellas Pharma US, Inc.
Aiden Abidov
Study design
Observational model
COHORT
Time perspective
PROSPECTIVE
Eligibility
Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No
Inclusion criteria
* Patients referred to a University of Arizona/Sarver Heart Center/University Medical Center stress imaging laboratory and scheduled to receive a regadenoson SPECT nuclear scan.
Exclusion criteria
* Patients unable or unwilling to undergo the clinically necessary stress test or to provide informed consent.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Determine the diagnostic accuracy of state-of-the-art echocardiography after regadenoson administration (Lexi-Echo) in the evaluation of myocardial ischemia (determined by the reference standard myocardial perfusion imaging SPECT). | 10 minutes |
Secondary
| Measure | Time frame |
|---|---|
| Obtain short term (6 month) outcomes: hospitalization for ischemia or infarction, coronary angiographic (invasive or noninvasive) correlation when available for clinical indications, and mortality. | 6 months |
| Perform a limited cost-analysis of the two diagnostic testing options | 6 months |
| Obtain hemodynamic Doppler Echo variables to investigate the acute hemodynamic alterations during Lexiscan infusion. | 10 minutes |
Countries
United States
Outcome results
None listed