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Cardiac Morbidity and the Cause of Death in Elderly Patients with Prostate Cancer and Incidental Cardiac Uptake on Bone Scintigraphy.
Clinical Physiology and Functional Imaging 2023 July 9
Cardiac transthyretin amyloidosis (ATTR) is a possible incidental finding on bone scintigraphy imaged due to prostate cancer. We investigated its significance in 1426 elderly prostate cancer patients (>70 years) who underwent bone scintigraphy in three nuclear medicine departments in Finland. Patients with Perugini grade two or three uptakes were considered positive for cardiac uptake. Heart failure diagnoses and pacemaker implantations were collected from the hospital's records. Mortality data were gathered from the Finnish national statistical service (Statistics Finland). The Median follow-up time was four years (interquartile range 2 - 5 years). Cardiac uptake was detected in 37 individuals (2.6%), and it was associated with an elevated risk of both overall and cardiovascular death in univariable analysis. However, cardiac uptake did not predict overall mortality in the multivariable analysis when adjusted to age, bone metastases, or the diagnosis of heart failure (p-value >0.05). The risk of heart failure was higher in patients with cardiac uptake (47% vs. 15%, p<0.001), while the risk of pacemaker implantations was not elevated (5% vs. 5%, p=0.89). In conclusion, cardiac uptake on bone scintigraphy imaged due to prostate cancer is associated with an elevated risk of heart failure and both overall and cardiovascular death. However, cardiac uptake was not independently associated with overall mortality when adjusted to age, bone metastasis, or heart failure. Therefore, they are essential to consider when incidental cardiac uptake is detected on bone scintigraphy. The need for pacemaker implantation was not elevated in patients with cardiac uptake. This article is protected by copyright. All rights reserved.
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