Hidden heart risk: study aims to catch deadly protein buildup before symptoms start

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

(V122I TTR carriers and carriers of other pathogenic TTR alleles (or matched non-carriers)) Inclusion Criteria: * Men and women ages 30-80 who are carriers of pathogenic TTR alleles (or matched non-carriers) without history of HF (this will be assessed by study personnel) and defined as: a) No history of hospitalization within the previous 12 months for management of HF; b) Without an elevated B-type natriuretic peptide level ≥100 pg/mL or NT-proBNP ≥360 pg/mL within the previous 12 months; or c) No clinical diagnosis of HF from a treating clinician * Signed informed consent Exclusion Criteria: * A self-reported history or clinical history of HF * Other known causes of cardiomyopathy * History of light-chain cardiac amyloidosis * Prior type 1 myocardial infarction (non-ST segment elevation myocardial Infarction {NSTEMI} or ST-elevation myocardial infarction {STEMI}) * Cardiac transplantation * Body weight \>250 lbs * Estimated glomerular filtration rate ≤30 mL/min/1.73 m2 * Inability to safely undergo CMRI (For participants with symptomatic hATTR-CA, we will enroll probands with HF from Aim 1 or patients with suspected symptomatic hATTR-CA from the three study sites.) Inclusion Criteria: * Men and women ages 30-80 who have symptomatic hATTR-CA as determined by a history of HF (this will be assessed by study personnel) and defined as: a) History of hospitalization within the previous 12 months for management of HF; b) An elevated B-type natriuretic peptide level ≥100 pg/mL or NT-proBNP ≥360 pg/mL within the previous 12 months; or c) A clinical diagnosis of HF from a treating clinician. * Have an established or suspected diagnosis of hATTR-CA based on either a) Biopsy confirmed by Congo red (or equivalent) staining with tissue typing with immunohistochemistry or mass spectrometric analysis or immunoelectron microscopy, OR b) positive technetium-99m (99mTc)-pyrophosphate or -bisphosphonate scan, combined with accepted laboratory criteria without abnormal M-protein. * TTR gene sequencing that is pending or that is confirming the pathogenic TTR variant * Signed informed consent Exclusion Criteria: * Other known causes of cardiomyopathy * History of light-chain cardiac amyloidosis * Cardiac transplantation * Liver transplantation * Previous treatment with a TTR stabilizer (tafamidis, acoramidis) within the prior 14 days or TTR any silencer (inotersen, patisiran, eplontersen) * Estimated glomerular filtration rate ≤30 mL/min/1.73 m2