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Impact of Myocardial Perfusion Imaging with PET and ⁸²Rb on Downstream Invasive Procedure Utilization, Costs, and Outcomes in Coronary Disease Management

Michael E. Merhige^1,2, William J. Breen^,1,3, Victoria Shelton², Teresa Houston³, Brian J. D'Arcy^1,3 and Anthony F. Perna¹

¹ Departments of Cardiology, Internal Medicine, and Nuclear Medicine, State University of New York at Buffalo, Buffalo, New York; ² Heart Center of Niagara, Niagara Falls, New York; and ³ Buffalo Cardiology and Pulmonary Associates, Buffalo, New York

Correspondence: For correspondence or reprints contact: Michael E. Merhige, MD, Heart Center of Niagara, 521 Tenth St., Niagara Falls, New York 14302. E-mail: merhige{at}buffalo.edu

We hypothesized that PET myocardial perfusion imaging with ⁸²Rb (PET MPI), would reduce downstream utilization of diagnostic arteriography, compared with SPECT, in patients matched for pretest likelihood of coronary disease (pCAD). PET MPI is more accurate for assessment of impaired coronary flow reserve compared with SPECT MPI, potentially reducing the demand for subsequent arteriography, percutaneous transcoronary intervention, and coronary artery bypass grafting (CABG), with attendant cost savings, while avoiding a negative impact on coronary events. Methods: The frequency of diagnostic arteriography, revascularization, costs, and 1-y clinical outcomes in 2,159 patients studied with PET MPI was compared with 2 control groups studied with SPECT MPI matched to the PET group by pCAD: an internal control group of 102 patients and an external SPECT control group of 5,826 patients. CAD management costs were approximated with realistic global fee estimates. Results: Arteriography rates were 0.34 and 0.31 for the external and internal control SPECT groups and 0.13 for the patients studied with PET (P < 0.0001). pCAD averaged 0.39 in patients studied with PET MPI, and in the external SPECT control group, and 0.37 in the internal SPECT controls. Revascularization rates were 0.13 and 0.11 for external and internal SPECT patients and 0.06 for the PET group (P < 0.0001; P < 0.01), with a cost savings of 30% noted for PET patients, with no significant difference in cardiac death or myocardial infaction at 1-y follow-up. Conclusion: PET MPI in patients with intermediate pCAD results in a >50% reduction in invasive coronary arteriography and CABG, a 30% cost savings, and excellent clinical outcomes at 1 y compared with SPECT.

Deceased.

COPYRIGHT © 2007 by the Society of Nuclear Medicine, Inc.

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