Abstract
Background: Despite advancements in the management of cardiac amyloidosis, the contemporary estimates of the cardiovascular deaths (CVDs) in amyloidosis are not well-established. Objective: This study sought to assess the longitudinal trends of CVDs with comorbid amyloidosis and analyze the disparities in mortality in terms of race, gender, and geographical location. Methods: We queried the Centers for Disease Control and Prevention's Wide-Ranging Online Data for Epidemiologic Research database and performed serial cross-sectional analyses of national death certificate data for cardiovascular mortality with comorbid amyloidosis among patients aged 25 and above. Diseases of the circulatory system (ICD-10 I00-I99) were listed as the underlying cause of death, and amyloidosis (ICD-10 E85) as contributing cause of death. We calculated age-adjusted mortality rates (AAMRs) per 1,000,000 individuals and determined the trends over time by estimating the annual percent change using the Joinpoint Regression Program. Results: In the 22-year study period, 4,145 CVDs with comorbid amyloidosis in the United States were identified between 1999 and 2020. The AAMRs increased significantly from 0.69 per 1,000,000 individuals in 1999 to 2.13 per 1,000,000 individuals in 2020 (p< 0.05), with an annual percent increase of +3.92. The AAMRs for the span of 22 years were higher in males than females (1.66 vs. 0.75, p<0.05). When stratified by race, African American populations had the highest cumulative AAMR (2.34) compared to other racial groups. In terms of urbanization, the AAMR was significantly higher in the urban regions compared to the rural areas (1.15 vs. 0.91, p<0.05). Conclusion: The AAMRs from CVDs with comorbid amyloidosis have increased significantly over the past two decades, with significant disparities in male and African American individuals. This emphasises the need of further research in the development of effective treatments for amyloid heart disease.
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