Tafamidis improves myocardial longitudinal strain in A97S transthyretin cardiac amyloidosis

Autor: Yuan-Kun (Aden) Wu, An-Li Yu, Mei-Fang Cheng, Lung-Chun Lin, Ming-Jen Lee, Chia-Hung Chou, Chia-Tung Shun, Hsueh-Wen Hsueh, Jimmy Jyh-Ming Juang, Ping-Huei Tseng, Siao-Ping Lin, Mao-Yuan Su, Chi-Chao Chao, Sung-Tsang Hsieh, Cheng-Hsuan Tsai, Yen-Hung Lin
Jazyk: angličtina
Rok vydání: 2024
Předmět:
Zdroj: Therapeutic Advances in Chronic Disease, Vol 15 (2024)
Druh dokumentu: article
ISSN: 2040-6231
20406223
DOI: 10.1177/20406223231222828
Popis: Background: Transthyretin cardiomyopathy (ATTR-CM) is a debilitating disease that has received much attention since the emergence of novel treatments. The Transthyretin Cardiomyopathy Clinical Trial showed that tafamidis, a transthyretin tetramer stabilizer, effectively reduced the declines in functional capacity and quality of life. However, Ala97Ser (A97S) hereditary ATTR-CM is underrepresented in major ATTR-CM tafamidis trials. Objectives: We aim to investigate the change in global longitudinal strain (GLS) of A97S ATTR-CM patients after 12 months of tafamidis treatment. Methods: We retrospectively analysed a prospective cohort of patients with A97S ATTR-CM who received tafamidis meglumine (61 mg/day) at the National Taiwan University Hospital. Echocardiography with speckle tracking strain analysis was performed at baseline and 12 months after treatment. Results: In all, 20 patients were included in the cohort. The baseline left ventricular ejection fraction (LVEF) and interventricular septum (IVS) thickness were 59.20 ± 13.23% and 15.10 ± 3.43 mm, respectively. After 12 months of tafamidis treatment, the LVEF and IVS were 61.83 ± 15.60% ( p = 0.244) and 14.59 ± 3.03 mm ( p = 0.623), respectively. GLS significantly improved from −12.70 ± 3.31% to −13.72 ± 3.17% ( p = 0.048), and longitudinal strain (LS) in apical and middle segments significantly improved from −16.05 ± 4.82% to −17.95 ± 3.48% ( p = 0.039) and −11.89 ± 4.38% to −13.58 ± 3.12% ( p = 0.039), respectively. Subgroup analysis showed that patients with LVEF
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