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Aims: Disease staging and prognostic scoring in wild-type transthyretin-related cardiac amyloidosis (ATTRwt-CA) can be captured by two systems (NAC and Columbia scores). However, uncertainty remains as epidemiology of the disease is evolving rapidly. We evaluated features associated with staging systems across ATTRwt-CA patients from different diagnostic pathways, and their association with prognosis., Methods: We performed an analysis on DIAMOND patients with available data to evaluate NAC and Columbia score. DIAMOND was a retrospective study from 17 Italian referral centres for CA, enrolling 1281 patients diagnosed between 2016 and 2021, and aimed at describing characteristics of pathways leading to ATTRwt-CA diagnosis. Of the original cohort, 811 patients were included in this analysis. Each patient had NAC and Columbia score calculated. Patients were grouped according to NAC and Columbia scoring classes. We described characteristics of patients according to staging classes and diagnostic pathways at diagnosis. Prevalence of early diagnoses, defined as NAC Ia, NYHA class I, no use of diuretics, no history of heart failure (HF) hospitalizations nor of atrial fibrillation prior to diagnosis, was investigated. Finally, prognostic variables were tested alone and grouped as NAC or Columbia scores in Cox univariate and multivariate regression analyses. Prognosis was investigated as all-cause mortality, in the whole population and dividing patients in HF versus other diagnostic pathways., Results: Only 1% of the study population had an early ATTRwt-CA diagnosis. Distribution of prognostic variables and of NAC and Columbia classes was heterogeneous across diagnostic pathways. The prevalence of NAC III and Columbia III was higher in the HF diagnostic pathway, but all NAC and Columbia classes were present in all pathways. Both NAC and Columbia scores were associated with all-cause mortality at univariate Cox regression analysis in the whole population, in patients from the HF diagnostic pathway and in those from other pathways. At multivariate analysis, Columbia score remained significantly associated with the outcome, together with age at diagnosis, left ventricular ejection fraction and maximal wall thickness., Conclusions: In this contemporary nationwide cohort, an ATTRwt-CA early diagnosis was very rare. Disease staging with NAC and Columbia scoring systems determined classes of patients with heterogeneous features. Both scores were significantly associated with mortality, but other variables also had prognostic significance., (© 2024 The Author(s). ESC Heart Failure published by John Wiley & Sons Ltd on behalf of European Society of Cardiology.)

Background: The introduction of a noninvasive diagnostic algorithm in 2016 led to increased awareness and recognition of cardiac amyloidosis (CA)., Objectives: The purpose of this study was to analyze the impact of the introduction of the noninvasive diagnostic algorithm on diagnosis and prognosis in a multicenter Italian CA cohort., Methods: This was a retrospective analysis of 887 CA patients from 5 Italian Cardiomyopathies Referral Centers: 311 light-chain CA, 87 variant transthyretin (TTR)-related CA, 489 wild-type TTR-related CA. Clinical characteristics and outcomes (all-cause mortality and heart failure [HF] hospitalizations) were compared overall and for each CA subtype between patients diagnosed before versus after 2016. Outcomes were further compared by propensity score weighted Kaplan-Meier analysis and Cox regression analysis., Results: CA diagnoses increased after 2016, in particular for wild-type TTR-related CA. Patients diagnosed after versus before 2016 were older, had less frequently a history of HF prior to diagnosis, and NYHA functional class III-IV at diagnosis. Over a median follow-up of 18 months, 172 (86%) patients diagnosed before 2016 died or had an HF hospitalization, versus 300 (44%) diagnosed after 2016. Propensity score weighted Kaplan-Meier analysis showed worse outcomes ( P  < 0.001) for patients diagnosed before 2016. At Cox regression analysis, CA diagnosis after 2016 was an independent protective factor for the composite outcome (HR: 0.69; P  = 0.001), with interaction by CA subtype (significant in TTR-related CA and null in light-chain)., Conclusions: CA patients diagnosed after 2016 showed a less severe phenotype and a better prognosis. The impact of the noninvasive diagnostic algorithm on outcomes was particularly relevant in TTR-related CA., Competing Interests: The work reported in this publication was funded by the 10.13039/501100003196Italian Ministry of Health, RC-2022-2773270 project. The authors have reported that they have no relationships relevant to the contents of this paper to disclose., (© 2024 The Authors.)

Transthyretin cardiac amyloidosis (ATTR-CA) predominantly affects older adults with multiple chronic conditions, leading to significant physical, cognitive, and emotional challenges. New disease-modifying drugs are effective in early stages, prompting a shift toward comprehensive assessments, including functional capacity and quality of life. However, these assessments may not fully capture the complexity of older ATTR-CA patients, especially regarding frailty and mood disorders, which can influence symptom reporting. Thus, integrating comprehensive geriatric assessment tools into routine clinical practice may be crucial to detect early signs of frailty or functional impairment that could impact outcomes and mitigate futility and ageism in the decision-making process. This review highlights the importance of evaluating multimorbidity, disability, and frailty in older patients with ATTR-CA to optimize management strategies., Competing Interests: Dr Maurer is supported by grant from 10.13039/100000002NIH R01HL139671 and R01AG081582-01; grants and personal fees from Alnylam, Pfizer, Eidos, Prothena, and Ionis; and personal fees from AstraZeneca, Akcea, Intellia, and Novo Nordisk. Dr Fontana is supported by a British Heart Foundation Intermediate Clinical Research Fellowship (FS/18/21/33447). Dr Gillmore has received consultancy fees from Alnylam, AstraZeneca, ATTRalus, Bridgebio, Ionis, Intellia, Lycia, and Pfizer. Dr Goyal is supported by 10.13039/100000049National Institute on Aging grants K76AG064428, R21AG077092, R01AG085420, and R24AG064025; and has received consulting fees from Agepha Pharma, Akros Pharma, Axon therapies, and Sensorum Health. Dr Fine has received research support and consulting honoraria from Pfizer, Alnylam, Ionis, AstraZeneca, Novo Nordisk, Sanofi/Genzyme, and Eidos/BridgeBio. Dr Grogan has received research support and or advisory board/consulting fees from Alnylam, BridgeBio/Eidos, Janssen, Pfizer, AstraZeneca, Novo, and Nordisk (all funds paid to employer, no personal compensation). Dr Marfella is supported by Programmi di Ricerca Scientifica di Rilevante Interesse Nazionale (Scientific research programs of high national interest) # 2020LM8WNW. Dr Limongelli has received research support and or advisory board/consulting fees from Alnylam, Pfizer, and AstraZeneca. Dr Longhi is supported by the Italian Ministry of Health, RC-2022-2773270 project. Dr Cuddy is supported by grant support from 10.13039/100000002NIH 1K23HL166686-01 and 10.13039/100000967AHA 23CDA857664; and has received personal fees from Pfizer, Bridgebio, Ionis, AstraZeneca, and Novo Nordisk. Dr Masri is supported by Research Grants from 10.13039/100004319Pfizer, Ionis, Attralus, and 10.13039/100014941Cytokinetics; and has received fees from Cytokinetics, BMS, Eidos, Pfizer, Ionis, Lexicon, Attralus, Haya, BioMarin, Alexion, and Tenaya. Dr Olivotto is supported by grants for “Respect,” “StratifyHF,” and “SmashHCM” and has received grants from 10.13039/100015340Bayer, 10.13039/100016619MyoKardia, Inc, which is a wholly owned subsidiary of Bristol Myers Squibb, Sanofi Genzyme, and Shire, which is now part of Takeda; personal fees from Bayer, Sanofi Genzyme, and Shire/Takeda; and payments as a consultant from MyoKardia, Inc. Dr Perfetto has received honoraria for advisory board participation from Pfizer, Alnylam, and Akcea. Dr Ungar is supported by Piano Nazionale di Ripresa e Resilienza grants. Dr Cappelli has received consultant fees from Pfizer, Alnylam, AstraZeneca, BridgeBio, Daiichi Sankyo, and Novo Nordisk. All other authors have reported that they have no relationships relevant to the contents of this paper to disclose., (© 2024 The Authors.)

Background: Amyloid deposition in tenosynovial structures precedes cardiac involvement up to 20 years. Therefore, a cardiological screening in patients with a history of tenosynovial manifestations of cardiac amyloidosis (CA) could lead to an increased number of early diagnoses., Methods: Patients with tenosynovial manifestations of CA (carpal tunnel syndrome, atraumatic biceps tendon rupture, lumbar spinal stenosis) have been identified by general practitioners and evaluated in a Referral Center for CA. Patients with a high suspicion of CA underwent the CA diagnostic pathway., Results: Among 50 General Practitioners (GP) contacted, 10 (20%) agreed to participate in the study for a total of 5615 patients ≥60 years. One hundred forty-five patients met the inclusion criteria, 2 of them already had a diagnosis of CA, and 57 agreed to undergo a cardiological evaluation (electrocardiography, echocardiography, NTproBNP assay). The median age was 73 [67-80] years and 31 (54%) were women. Eight patients were suggested to start the CA diagnostic pathway, five of them underwent a complete diagnostic evaluation for CA, three refused to complete the diagnostic exams and no new diagnoses were made., Conclusion: A screening program for CA in patients with tenosynovial manifestations identified by general practitioners is feasible, but may not yield a high rate of new diagnosis. In this study, we identified two patients who already had a diagnosis of CA, and among patients at high risk for CA, 37% refused to complete the diagnostic pathway. Increased awareness of CA among patients might increase participation and diagnostic yield in screening studies. Further validation of this protocol is needed to evaluate its diagnostic performance., Competing Interests: Declaration of competing interest The authors declare that there is no conflict of interest., (Copyright © 2023. Published by Elsevier B.V.)

Background: Atrial fibrillation (AF) is common in patients with cardiac amyloidosis (CA) and is a significant risk factor for heart failure hospitalization and thromboembolic events., Objective: This study was designed to investigate the atrial electrofunctional predictors of incident AF in CA., Methods: A multicenter, observational study was conducted in 4 CA referral centers including sinus rhythm patients with light-chain (AL) and transthyretin (ATTR) CA undergoing electrocardiography and cardiac magnetic resonance imaging. The primary end point was new-onset AF occurrence., Results: Overall, 96 patients (AL-CA, n = 40; ATTR-CA, n = 56) were enrolled. During an 18-month median follow-up (Q1-Q3, 7-29 months), 30 patients (29%) had incident AF. Compared with those without AF, patients with AF were older (79 vs 73 years; P = .001). They more frequently had ATTR (87% vs 45%; P < .001); electrocardiographic interatrial block (IAB), either partial (47% vs 21%; P = .011) or advanced (17% vs 3%; P = .017); and lower left atrial ejection fraction (LAEF; 29% vs 41%; P = .004). Age (hazard ratio [HR], 1.059; 95% CI, 1.002-1.118; P = .042), any type of IAB (HR, 2.211; 95% CI, 1.03-4.75; P = .041), and LAEF (HR, 0.967; 95% CI, 0.936-0.998; P = .044) emerged as independent predictors of incident AF. Patients exhibiting any type of IAB, LAEF <40%, and age >78 years showed a cumulative incidence for AF of 40% at 12 months. This risk was significantly higher than that carried by 1 (8.5%) or none (7.6%) of these 3 risk factors., Conclusion: In patients with CA, older age, IAB on 12-lead electrocardiography, and reduced LAEF on cardiac magnetic resonance imaging are significant and independent predictors of incident AF. A closer screening for AF is advisable in CA patients carrying these features., Competing Interests: Disclosures A.C. received honoraria from Alnylam, AstraZeneca, and Pfizer., (Copyright © 2024 Heart Rhythm Society. Published by Elsevier Inc. All rights reserved.)

Cardiac amyloidosis (CA) is an infiltrative cardiomyopathy divided into two types: light-chain (LA) and transthyretin (ATTR) CA. Cardiac magnetic resonance (CMR) has emerged as an important diagnostic tool in CA. While late gadolinium enhancement (LGE), T1 mapping and extracellular volume (ECV) have a consolidate role in the assessment of CA, T2 mapping has been less often evaluated. We aimed to test the value of T2 mapping in the evaluation of CA. This study recruited 70 patients with CA (51 ATTR, 19 AL). All the subjects underwent 1.5 T CMR with T1 and T2 mapping and cine and LGE imaging. Their QALE scores were evaluated. The myocardial T2 values were significantly ( p < 0.001) increased in both types of CA compared to the controls. In the AL-CA group, increased T2 values were associated with a higher QALE score. The myocardial native T1 values and ECV were significantly ( p < 0.001) higher in the CA patients than in the healthy subjects. Left ventricular (LV) mass, QALE score and ECV were higher in ATTR amyloidosis compared with AL amyloidosis, while the LV ejection fraction was lower ( p < 0.001). These results support the concept of the presence of myocardial edema in CA. Therefore, a CMR evaluation including not only myocardial T1 imaging but also myocardial T2 imaging allows for more comprehensive tissue characterization in CA.

Background: Whether, and to what extent, frailty and other geriatric domains are linked to health status in patients with transthyretin cardiac amyloidosis (ATTR-CA) is unknown., Aims: To determine the association of frailty with health status [defined by the Kansas City Cardiomyopathy Questionnaire (KCCQ)] in patients with ATTR-CA., Methods: Consecutive ATTR-CA patients undergoing cardiovascular assessment at a tertiary care clinic from September 2021 to September 2023 were invited to participate. KCCQ, frailty and social environment were recorded. Frailty was assessed using the modified Frailty Index (mFI), mapping 11 variables from the Canadian Study of Health and Aging (frailty ≥0.36)., Results: Of 168 screened ATTR-CA patients, 138 [83% men, median age of 79 (75-84) years] were enrolled in the study. Median KCCQ was 66 (50-75). wtATTR-CA was the most prevalent form (N = 113, 81.9%). The most frequent cardiac variant was Ile68Leu (17/25 individuals with vATTR-CA). Twenty (14.5%) patients were considered frail, and prevalence of overt disability was 6.5%. At multivariable linear regression analysis, factors associated with worsening KCCQ were age at evaluation, the mFI, NYHA Class, and NAC Score. Gender, ATTR-CA type, phenotype, and LVEF were not associated with health status., Discussion: In older patients diagnosed with ATTR-CA, frailty, symptoms, and disease severity were associated with KCCQ., Conclusions: Functional status is a determinant of quality of life and health status in older individuals with a main diagnosis of ATTR-CA. Future research may provide more in-depth knowledge on the association of frailty in patients with ATTR-CA with respect to quality of life and prognosis., (© 2024. The Author(s).)

Background: The extent of myocardial bone tracer uptake with technetium pyrophosphate, hydroxymethylene diphosphonate, and 3,3-diphosphono-1,2-propanodicarboxylate in transthyretin amyloid cardiomyopathy (ATTR-CM) might reflect cardiac amyloid burden and be associated with outcome., Methods: Consecutive patients with ATTR-CM who underwent diagnostic bone tracer scintigraphy with acquisition of whole-body planar and cardiac single-photon emission computed tomography (SPECT) images from the National Amyloidosis Centre and 4 Italian centers were included. Cardiac uptake was defined according to the Perugini classification: 0=absent cardiac uptake; 1=mild uptake less than bone; 2=moderate uptake equal to bone; and 3=high uptake greater than bone. Extent of right ventricular (RV) uptake was defined as focal (basal segment of the RV free wall only) or diffuse (extending beyond basal segment) on the basis of SPECT imaging. The primary outcome was all-cause mortality., Results: Among 1422 patients with ATTR-CM, RV uptake accompanying left ventricular uptake was identified by SPECT imaging in 100% of cases at diagnosis. Median follow-up in the whole cohort was 34 months (interquartile range, 21 to 50 months), and 494 patients died. By Kaplan-Meier analysis, diffuse RV uptake on SPECT imaging (n=936) was associated with higher all-cause mortality compared with focal (n=486) RV uptake (77.9% versus 22.1%; P <0.001), whereas Perugini grade was not associated with survival ( P =0.27 in grade 2 versus grade 3). On multivariable analysis, after adjustment for age at diagnosis (hazard ratio [HR], 1.03 [95% CI, 1.02-1.04]; P <0.001), presence of the p.(V142I) TTR variant (HR, 1.42 [95% CI, 1.20-1.81]; P =0.004), National Amyloidosis Centre stage (each category, P <0.001), stroke volume index (HR, 0.99 [95% CI, 0.97-0.99]; P =0.043), E/e' (HR, 1.02 [95% CI, 1.007-1.03]; P =0.004), right atrial area index (HR, 1.05 [95% CI, 1.02-1.08]; P =0.001), and left ventricular global longitudinal strain (HR, 1.06 [95% CI, 1.03-1.09]; P <0.001), diffuse RV uptake on SPECT imaging (HR, 1.60 [95% CI, 1.26-2.04]; P <0.001) remained an independent predictor of all-cause mortality. The prognostic value of diffuse RV uptake was maintained across each National Amyloidosis Centre stage and in both wild-type and hereditary ATTR-CM ( P <0.001 and P =0.02, respectively)., Conclusions: Diffuse RV uptake of bone tracer on SPECT imaging is associated with poor outcomes in patients with ATTR-CM and is an independent prognostic marker at diagnosis., Competing Interests: Disclosures The authors report no conflicts in relation to the submitted work. They report the following conflicts outside the submitted work: Dr Rapezzi served on the Italian scientific advisory board of Pfizer and received unrestricted research grants and personal fees from Pfizer and personal fees from Alnylam Pharmaceuticals. Dr Biagini received advisory board fees from Sanofi, Genzyme, and Takeda. Dr Cappelli received advisory board fees from Pfizer and Akcea and research grants from Pfizer. Dr Sinagra received personal fees for occasional educational activities from Biotronik, Boston Scientific, AstraZeneca, and Novartis. Dr Canepa received speaker and advisor fees from Akcea Therapeutics, Menarini, Novartis, Pfizer, Sanofi e Sanofi Genzyme, and Vifor Pharma, as well as 2 investigator-initiated grants from Pfizer. Dr Fontana is supported by a British Heart Foundation intermediate clinical research fellowship (FS/18/21/33447). Dr Merlo received congress fees from Novartis and Vifor Pharma and research grant and congress fees from Pfizer. Dr Gillmore receives advisory board fees from Pfizer, Alnylam, ATTRalus, Intellia, AstraZeneca, and BridgeBio.

Background: Transthyretin amyloid cardiomyopathy (ATTR-CM) is associated with a progressive reduction of functional capacity. The progression of cardiopulmonary exercise testing (CPET) parameters over time is still unknown., Methods: In this study, 55 patients with ATTR-CM underwent 2 serial cardiologic evaluations and CPETs in a national referral center for cardiac amyloidosis (Careggi University Hospital, Florence)., Results: Forty-three patients (78%) had wild-type ATTR. Median age was 80 years (interquartile range [IQR] 76-83 years), and 50 of the patients (91%) were men. At baseline, median peak oxygen consumption (pVO 2 ) was 15 mL/kg/min (IQR 12-18 mL/kg/min), percentage of predicted pVO 2 (%ppVO 2 ) was 71% (IQR 60%-83%) and VE/VCO 2 slope was 31 (IQR 26-34). After a median follow-up of 14 months (IQR 13-16 months), pVO 2 , %ppVO 2 and VE/VCO 2 slope were significantly worsened (-1.29 mL/kg/min [95% confidence interval (CI): -1.85 to -0.74; P < 0.01], -4.5% [95% CI: -6.9 to -2.02; P < 0.01], and 8.6 [95% CI 6-11; P < 0.01], respectively). Furthermore, exercise time (-39 s, 95% CI: -59 to -19; P < 0.01), exercise tolerance (-0.47 metabolic equivalents, 95% CI: -0.69 to -0.2; P < 0.01), and peak systolic pressure (-10.8 mm Hg, 95% CI: -16.2 to -5.4; P < 0.01) were significantly reduced. The worsening in CPET variables did not correspond with a significant change in echocardiographic parameters., Conclusions: Cardiorespiratory response to exercise significantly worsened over a short period of time in patients with ATTR-CM. Serial CPET may be useful to identify early disease progression., (Copyright © 2023 The Authors. Published by Elsevier Inc. All rights reserved.)

Background: Transthyretin cardiac amyloidosis (ATTR-CA) has a deep impact on the quality of life (QoL), yet no specific patient-reported outcome measures (PROMs) for ATTR-CA exist., Methods: The ITALY study involved 5 Italian referral centres (Pisa, Pavia, Ferrara, Florence, Messina) enrolling consecutive outpatients with ATTR-CA., Results: Two 30-item questionnaires were created for wild-type (wt) and variant (v) ATTR-CA. Scores ranged from 100 (best condition) to 0 (worst condition). Out of 140 patients enrolled (77% with ATTRwt-CA), 115 repeated the re-evaluation at 6 months. At baseline, only 30% of patients needed help to fill out the questionnaires. Among baseline variables, all KCCQ and SF-36 domains were univariate predictors of ITALY scores in ATTRwt-CA patients, with the KCCQ Symptom Summary score (beta coefficient 0.759), Social Limitations (0.781), and Overall summary score (0.786) being the strongest predictors. The SF-36 Emotional well-being score (0.608), the KCCQ Overall summary score (0.656), and the SF-36 Energy/fatigue score (0.669) were the strongest univariate predictors of ITALY scores in ATTRv-CA. Similar results were found at 6 months., Conclusions: The ITALY questionnaires are the first specific PROMs for ATTRwt- and ATTRv-CA. Questionnaire completion is feasible. ITALY scores display close relationships with non-ATTR-specific measures of QoL.

Background: Tafamidis was approved to treat patients with transthyretin amyloid cardiomyopathy (ATTR-CM) on the basis of findings from the phase 3 Tafamidis in Transthyretin Cardiomyopathy Clinical Trial (ATTR-ACT)., Objectives: This study was a post hoc analysis exploring tafamidis efficacy in octogenarian patients., Methods: Analysis of patients aged <80 and ≥80 years in ATTR-ACT and its ongoing open-label long-term extension (LTE) study, where all patients receive tafamidis., Results: After 30 months in ATTR-ACT, least squares (LS) mean change from baseline in 6-minute walk test (6MWT) distance, N-terminal pro-B-type natriuretic peptide (NT-proBNP) concentration, and Kansas City Cardiomyopathy Questionnaire Overall Summary (KCCQ-OS) score were smaller (all P < 0.05) in patients aged ≥80 years treated with tafamidis (n = 51) vs placebo (n = 37). At the LTE study interim analysis, patients aged ≥80 years treated continuously with tafamidis had a smaller decline in KCCQ-OS score (P < 0.05) and trended toward longer median survival (45 vs 27 months; all-cause mortality HR: 0.6828 [95% CI: 0.4048-1.1517]; P = 0.1526) than those initially treated with placebo in ATTR-ACT. Similar efficacy was observed in patients aged <80 years in ATTR-ACT, including smaller LS mean change from baseline in 6MWT distance, NT-proBNP concentration, and KCCQ-OS score, and lower rate of cardiovascular-related hospitalizations with tafamidis (n = 125) vs placebo (n = 140). In the LTE study, patients aged <80 years treated continuously with tafamidis had a longer median survival (80 vs 41 months; HR = 0.4513 [95% CI: 0.3176-0.6413]; P < 0.0001) and a smaller decline in KCCQ-OS score than those initially treated with placebo., Conclusions: The findings demonstrate tafamidis efficacy for patients with ATTR-CM both in those aged <80 and those aged ≥80 years. (Tafamidis in Transthyretin Cardiomyopathy Clinical Trial [ATTR-ACT]; NCT01994889/Long-term Safety of Tafamidis in Subjects With Transthyretin Cardiomyopathy; NCT02791230)., Competing Interests: Funding Support and Author Disclosures This study was sponsored by Pfizer. Pfizer contributed to the design and conduct of the study and management and collection of data. In their role as authors, employees of Pfizer were involved in the analysis and interpretation of data, preparation, review, and approval of the manuscript and the decision to submit for publication, along with their co-authors. The study sponsor approved the manuscript from an intellectual property perspective but had no right to veto the publication. Dr Garcia-Pavia has served as a speaker in scientific meetings for Alexion, Alnylam, BridgeBio, Ionis, AstraZeneca, Novo Nordisk, and Pfizer; has received funding from Alnylam and Pfizer for scientific meeting expenses; has received consultancy fees from Alnylam, Attralus, BridgeBio, Neuroimmune, AstraZeneca, Novo Nordisk, Alexion, Intellia, and Pfizer; and his institution has received research grants/educational support from Alnylam, AstraZeneca, BridgeBio, Intellia, and Pfizer. Dr Sultan and Mr Gundapaneni are full-time employees of Pfizer and hold stock/stock options. Dr Sekijima has a patent concerning tafamidis; has received honoraria for lectures and advisory board participation from Pfizer and Alnylam; and his institution has received research grants from Pfizer and Alnylam. Dr Perfetto has received honoraria for advisory board participation from Pfizer, Alnylam, and Akcea. Dr Hanna has received honoraria for advisory board participation from Pfizer, Alnylam, Akcea, Alexion, and Eidos; and has served as a speaker for a scientific meeting session funded by Alnylam. Dr Witteles has received honoraria for advisory board participation from Pfizer, Alnylam, Ionis, AstraZeneca, Janssen, Intellia, BridgeBio, Novo Nordisk, and Alexion., (Copyright © 2024 The Authors. Published by Elsevier Inc. All rights reserved.)

Caregivers' psychological well-being is linked to the quality of care provided for familiar with chronic illness. Despite caregivers of cardiac patients present an impaired psychological well-being, less investigated is the psychological well-being of caregivers of individuals with a rare disease such as the Transthyretin Cardiac Amyloidosis (ATTR-CA). Specifically, given that no study explored the well-being of the caregiver and the caregiver-patient relationship, this study aimed to analyze the prevalence of anxiety and depression in ATTR-CA caregivers and if these disorders were associated with patient's and caregiver's characteristics. Fifty-eight dyad caregiver-ATTR-CA patients completed the Hospital Anxiety and Depression Scale and the Network of Relationships Inventory. Moreover, ATTR-CA patients completed the Kansas City Cardiomyopathy Questionnaire, while caregivers completed the Multidimensional Scale of Social Support. Results showed that anxious caregivers (44%) reported higher conflict with patients. They had ATTR-CA relatives with a worse perception of cardiac symptoms and higher anxiety and depression. Depressed caregivers (39%) reported higher conflict with ATTR-CA relatives and lower perceived social support. Caregiver reported a high prevalence of anxiety and depression associated with worse personal relational well-being and to patient's psycho-physical condition. The care of ATTR-CA patient should consider the caregiver well-being.