Faculty Collaboration Database

The diagnostic and prognostic value of near-normal perfusion or borderline ischemia on stress myocardial perfusion imaging. J Nucl Cardiol 2022 Apr;29(2):826-835

Date

10/10/2020

Pubmed ID

33034835

DOI

10.1007/s12350-020-02375-y

Scopus ID

2-s2.0-85092305072 (requires institutional sign-in at Scopus site)   7 Citations

Abstract

BACKGROUND: Data on the diagnostic and prognostic value of subtle abnormalities on myocardial perfusion imaging (MPI) are limited.

METHODS AND RESULTS: In a retrospective single-center cohort of patients who underwent regadenoson SPECT-MPI, near-normal MPI was defined as normal left ventricular ejection fraction (LVEF ≥ 50%) and a summed stress score (SSS) of 1-3 vs SSS = 0 in normal MPI. Borderline ischemia was defined as normal LVEF, SSS = 1-3, and a summed difference score (SDS) of 1 vs SDS = 0 in the absence of ischemia. Coronary angiography data within 6 months from MPI were tabulated. Patients were followed for cardiac death (CD), myocardial infarction (MI), coronary revascularization (CR), and Late CR (LCR) [> 90 days post MPI]. Among 6,802 patients (mean age, 62 ± 13 years; 42% men), followed for a mean of 2.5 ± 2.1 years, 4,398 had normal MPI, 2,404 had near-normal MPI, and 972 had borderline ischemia. Among patients who underwent angiography within 6 months, obstructive (≥ 70% or left main ≥ 50%) CAD was observed at higher rates among subjects with near-normal MPI (33.5% vs 25.5%; P = .049) and those with borderline ischemia (40.5% vs 25.8%; P = .004). During follow-up, 158 (2.3%) CD/MI, 246 (3.6%) CR, and 150 (2.2%) LCR were observed. Near-normal MPI (SSS = 1-3), compared to normal MPI (SSS = 0), was not associated with a significant difference in the risk of the composite endpoint of CD/MI (Hazard ratio [HR], 1.21; 95% confidence interval [CI], .88-1.66; P = .243) or LCR (HR 1.28; CI .93-1.78; P = .130), but was associated with a significant increase in the risk of CR (HR 1.91; CI 1.49-2.46; P < .001). Borderline ischemia (SDS = 1), compared to no ischemia (SDS = 0), was not associated with a significant difference in the risk of CD/MI [HR 1.09; CI .70-1.69; P = .693], but was associated with a significant increase in the risk of CR (HR 5.62; CI 3.08-10.25; P < .001) and LCR (HR 2.98; CI 1.36-6.53; P = .006).

CONCLUSION: Near-normal MPI and borderline ischemia on SPECT-MPI provide no significant prognostic information in predicting hard cardiac events but are associated with higher rates of obstructive angiographic CAD and coronary revascularizations.

Author List

Kassab K, Hussain K, Torres A, Iskander F, Iskander M, Khan R, Doukky R

Author

Mina Iskander MBBS Assistant Professor in the Medicine department at Medical College of Wisconsin

MESH terms used to index this publication - Major topics in bold

Aged
Coronary Artery Disease
Exercise Test
Female
Humans
Male
Middle Aged
Myocardial Infarction
Myocardial Ischemia
Myocardial Perfusion Imaging
Perfusion
Prognosis
Retrospective Studies
Stroke Volume
Tomography, Emission-Computed, Single-Photon
Ventricular Function, Left