ArticleAnnals of nuclear medicine2025
Prognostic significance of non-perfusion parameters of cadmium-zinc-telluride single-photon emission computed tomography myocardial perfusion imaging for individuals with normal myocardial perfusion: a large-scale single-center retrospective cohort study.
Article in Annals of nuclear medicine, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
purposeThe study aimed to assess the prognostic value of non-perfusion parameters for gated myocardial perfusion imaging (MPI) performed using Cadmium-Zinc-Telluride (CZT) single-photon emission computed tomography (SPECT) for individuals with normal myocardial perfusion.
methodsWe analyzed data from consecutive patients who underwent thallium-201 MPI SPECT with normal perfusion. Major adverse cardiovascular events (MACEs) were recorded during a 2-year follow-up. Non-perfusion parameters were evaluated as predictors of MACEs.
resultsAmong 1570 patients with normal SPECT perfusion, 80 (5.1%) experienced MACEs over a mean follow-up of 22.5 ± 10.8 months: 12 (0.8%) had cardiac death, and 68 (4.3%) underwent coronary revascularization due to significant coronary artery disease. Independent predictors of MACEs included worsening post-stress ejection fraction (HR: 1.971; p = 0.008), and increased lung-to-heart ratio (HR: 2.207; p = 0.001). Kaplan-Meier analysis showed the highest MACEs' incidence in patients with two of these factors (p < 0.001). Among patients with normal resting ejection fraction, EF worsening (OR: 2.16; p = 0.004) and increased lung-to-heart ratio (OR: 1.91; p = 0.0013) both remained strong predictors.
conclusionsAlthough normal myocardial perfusion typically indicates low risk for obstructive coronary artery disease, worsening post-stress ejection fraction and increased lung-to-heart ratio are crucial prognostic indicators. Importantly, these non-perfusion parameters retain their prognostic value even in patients without clinical heart failure, highlighting their relevance in comprehensive risk stratification beyond perfusion assessment alone.
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