News | Radiopharmaceuticals and Tracers | October 17, 2016

Novel PET Agent Effective in Patients with Suspected Heart Disease Undergoing Exercise Stress Testing

Findings show superiority of flurpiridaz F-18 PET myocardial perfusion imaging compared to SPECT MPI

Lantheus, flurpiridaz F-18, myocardial perfusion imaging, MPI, cardiac stress testing, ASNC 2016

October 17, 2016 — Lantheus Holdings Inc. announced in late September that sub-analysis data from the first Phase 3 study of flurpiridaz F-18 for myocardial perfusion imaging (MPI) in patients undergoing exercise stress testing. The data was presented at the 21st annual scientific session of the American Society of Nuclear Cardiology (ASNC), Sept. 22-25 in Boca Raton, Fla. 

The findings show the superiority of flurpiridaz F-18, an investigational positron emission tomography (PET) agent for MPI, compared to MPI with single photon emission computed tomography (SPECT) for the assessment of coronary artery disease (CAD) during exercise stress testing.

“Due to short half-life limitations of currently available tracers (13NH3 and 82Rb), PET myocardial perfusion imaging is commonly used in conjunction with pharmacologic stress testing,” said Rob Beanlands, M.D., of University of Ottawa Heart Institute, the lead author of the presentation. “The ability to perform PET imaging with exercise stress would allow us to gather important additional clinical information and also to use the same camera for both stress modalities. The results of this study provide evidence of the particular utility and future potential of flurpiridaz F-18 PET imaging for the diagnosis of coronary artery disease.”

Based on a blinded read of PET and SPECT data, flurpiridaz F-18 PET imaging demonstrated a statistically greater sensitivity (67 percent) versus SPECT (54.9 percent) (p<0.016) but lower specificity (73.8 percent) versus SPECT (85.4 percent, non-significant for non-inferiority testing). Improved diagnostic performance of flurpiridaz F-18 PET imaging versus SPECT was also observed by ROC analysis (p<0.05). A significantly higher percentage of images were rated as either excellent or good quality with flurpiridaz F-18 PET imaging, compared to SPECT for rest images (p<0.001).  No drug-related serious adverse events were observed. 

The data are from a multicenter, international (United States, Canada, and Finland) Phase 3 study of flurpiridaz F-18 PET imaging, conducted in the United States, Canada and Finland. The study enrolled approximately 800 patients with known or suspected CAD who were scheduled for coronary angiography and conventional SPECT. Of these patients, 221 with known or suspected CAD underwent exercise stress flurpiridaz F-18 PET and SPECT imaging and coronary angiography.     

Lantheus is poised to commence the second of two Phase 3 trials for flurpiridaz F-18 PET imaging with a revised protocol in place under a U.S. Food and Drug Administration (FDA)-approved Special Protocol Assessment and is in active negotiations with potential strategic partners to assist with the further development, manufacture and commercialization of the agent.  

For more information: www.lantheus.com


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