Clinical Trials

Inclusion Criteria:

* Has documented diagnosis of ATTR amyloidosis with cardiomyopathy including those with hereditary ATTR (hATTR) or wild-type ATTR (wATTR) amyloidosis.
* Has medical history of heart failure (HF) with at least 1 prior hospitalization for HF or signs and symptoms that require treatment with a diuretic.
* Has screening N-terminal prohormone B-type natriuretic peptide (NT-proBNP) \>300 ng/L and \<8500 ng/L; In patients with permanent or persistent atrial fibrillation, screening NT-proBNP \>600 ng/L and \<8500 ng/L.
* Patients may be receiving approved TTR stabilizers for ATTR amyloidosis (eg, tafamidis, acoramidis) and may be receiving background therapy for HF at the discretion of the Investigator.

Exclusion Criteria:

* Has New York Heart Association (NYHA) Class IV HF; or NYHA Class III heart failure AND ATTR Amyloidosis Disease Stage 3.
* Has a polyneuropathy disability (PND) Score IIIa, IIIb, or IV.
* Has an estimated glomerular filtration rate eGFR of \<30 mL/min/1.73m\^2 at screening.
* Has received prior or currently receiving TTR-lowering therapy

Note: Other protocol defined Inclusion/Exclusion Criteria may apply.

Eligibility last updated 08/12/2025. Questions regarding updates should be directed to the study team contact.