Key result
Tafamidis is linked to ~42% lower mortality in nonagenarians with wild-type ATTR-CM.
Why the study?
The diagnosis of wtATTR-CM has increased especially in patients over 80 years old, but objective tools are needed to identify which octogenarians may benefit from disease-specific therapy beyond chronological age.
Does tafamidis improve survival in nonagenarian patients (age >90) with ATTR-CA?
Cohort (n=336)
Yes
Does tafamidis improve survival in nonagenarian patients (age >90) with ATTR-CA?
Hazard Ratio: 0.58 (95% CI 0.38–0.89)
Absolute Event Rate: 84% vs 74%
p-value: p=0.01
Tafamidis is associated with a significant survival benefit in ATTR-CA patients over 90 years old, supporting the use of comprehensive geriatric assessment rather than chronological age to guide treatment.
Tafamidis was associated with improved survival in nonagenarians with wtATTR-CM; extends observations but remains hypothesis-generating and should not yet change practice.
Wild type transthyretin cardiac amyloidosis (wtATTR-CM) is an age-related condition which results from the deposition of insoluble amyloid fibrils, formed by the misfolding of transthyretin, a protein produced by the liver. It is a progressive disease if left untreated. The improvement in non-invasive diagnostic pathways, coupled with raised disease awareness and the recognition of wtATTR-CM as a treatable condition, has been associated with an exponential increase in the diagnosis especially in patients over 80-year-old - an underrepresented category in clinical trials. Recent evidence suggests that while some octogenarians may gain benefit from disease-specific therapy, others do not respond. For this reason, in octogenarians the key future challenge will be to validate objective tools to identify patients who are unlikely to benefit from disease modifying treatment and at the same time not to discriminate patients simply on chronological age, with the overall aim to identify those patients who may gain most benefit from intervention.
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Fontana et al. (2024) conducted a cohort in Wild-type transthyretin cardiac amyloidosis (wtATTR-CM) (n=336). Tafamidis vs. Non-treated was evaluated on 12-month survival (HR 0.58, 95% CI 0.38-0.89, p=0.01). Tafamidis treatment significantly improved survival in nonagenarian patients with wild-type transthyretin cardiac amyloidosis compared to no treatment (HR 0.58).
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