Article
作者: Sarswat, Nitasha ; Warner, Alberta ; Kelly, Jeffery W. ; Badarin, Firas Al ; Beamud, Francisco Munoz ; Gottlieb, Stephen ; Azevedo, Olga ; Briseno, Maria Alejandra Gonzalez Duarte ; Lenihan, Daniel ; Praktiknjo, Michael ; Mueller, Christopher ; Inamo, Jocelyn ; Luigetti, Marco ; Waddington-Cruz, Marcia ; Conceicao, Isabel ; Delgado, Diego ; Grogan, Martha ; Diemberger, Igor ; Costello, Jose Gonzalez ; Mohty, Dania ; Quan, Dianna ; Cirami, Calogero Lino ; Nienhuis, Hans ; Drachman, Brian ; Coelho, Teresa ; Fine, Nowell ; Powers, Evan ; Tschoepe, Carsten ; Tan, Cheng Yin ; Torrón, Roberto Fernandéz ; Salutto, Valeria Lujan ; Adams, David ; Ueda, Mitsuharu ; Pavia, Pablo Garcia ; Nicolau, Jose Nativi ; Miller, Edward ; Cariou, Eve ; Wixner, Jonas ; Kim, Darae ; Brunkhorst, Robert ; Amass, Leslie ; Kristen, Arnt V. ; Chao, Chi-Chao ; Ventura, Hector ; de BarrosCorreia, Edileide ; Freimer, Miriam ; Carlsson, Martin ; Tournev, Ivailo ; Zivkovic, Sasa ; Badelita, Sorina ; Dispenzieri, Angela ; Riley, Steve ; Polydefkis, Michael ; Plante-Bordeneuve, Violaine ; Slosky, David ; Tallaj, Jose ; Tauras, James ; Moreno, Juan Gonzalez ; Emden, Michele
INTRODUCTION:Tafamidis is approved to treat transthyretin amyloid cardiomyopathy (ATTR-CM). Many patients with ATTR-CM present with a mixed phenotype of both cardiac and neurologic symptoms, but real-world effectiveness studies of tafamidis in this population are lacking. This study assessed survival and other outcomes in a real-world, contemporary cohort of tafamidis-treated and untreated patients with mixed-phenotype ATTR-CM.
METHODS:The Transthyretin Amyloidosis Outcomes Survey (THAOS) was a longitudinal, observational, phase 4 study of patients with transthyretin amyloidosis and asymptomatic carriers of pathogenic transthyretin gene variants and was completed in June 2023. This analysis included a contemporary cohort of patients enrolled in THAOS in 2019-2023 who were characterized as having mixed-phenotype ATTR-CM at enrollment. The tafamidis-treated cohort received the approved dose of tafamidis (meglumine 80 mg/free acid 61 mg) throughout the study, and the untreated cohort never received tafamidis.
RESULTS:In tafamidis-treated (n = 116) and untreated patients (n = 223), respectively, median age at enrollment was 77.8 and 72.8 years, and 42.2% and 77.6% had variant ATTR-CM. Survival rates at 30 months were 81.5% (95% CI 66.7-90.2) in tafamidis-treated patients and 75.1% (95% CI 66.1-82.0) in untreated patients. Median yearly incidence of cardiovascular-related hospitalizations was 0.89 for tafamidis-treated and 1.70 for untreated patients, and median duration of cardiovascular-related hospitalizations was 7.0 and 11.5 days, respectively. There were 13 (11.2%) and 40 (17.9%) deaths in the respective groups.
CONCLUSION:Patients with mixed-phenotype ATTR-CM treated with the approved dose of tafamidis had numerically higher survival rates, a numerically lower rate of cardiovascular-related hospitalizations, and fewer deaths than untreated patients. These data parallel recent results for patients with predominantly cardiac ATTR-CM from THAOS and extend results of ATTR-ACT to a contemporary, real-world, mixed-phenotype population.
TRIAL REGISTRATION:ClinicalTrials.gov identifier NCT00628745.