Temporal trends of single-photon emission computed tomography myocardial perfusion imaging in patients without prior coronary artery disease: A 22-year experience at a tertiary academic medical center

In Mayo Clinic Rochester, annual SPECT utilization in patients without prior CAD increased in 1992-2002 but then decreased. Despite similar CAD risk factors and decreased utilization after 2003, more tests were low risk; summed stress score, summed difference score, and high-risk tests all decreased. Our findings confirm previous observations that SPECT was increasingly used in patients with a lower prevalence of CAD.