Summary: Transthyretin (TTR) is a protein made by the liver that helps transport thyroid hormone and vitamin A in the blood. In some people, this protein breaks down and forms harmful clumps called amyloid. TTR amyloid gets deposited in the heart wall and stops it from pumping blood properly, which may lead to heart failure. The breakage in TTR protein can be age-related (wild-type ATTR-CM), or genetic (va...

Summary: Transthyretin amyloidosis (ATTR) is a disease where the normally occurring transthyretin (TTR) protein falls apart and forms amyloid, a sticky plaque-like substance that accumulates in different organs in the body and can cause damage to the organ. There are two ways that the TTR protein can fall apart. One way occurs as a person ages, where the normal TTR protein can fall apart and form amyloid t...

Summary: Transthyretin Amyloid Cardiomyopathy (ATTR-CM) is a serious and life-threatening condition where a protein called transthyretin (TTR) misfolds and builds up as amyloid fibrils in the heart muscle. This buildup causes the heart to become stiff, leading to restrictive cardiomyopathy and progressive heart failure. There are two forms of ATTR-CM: a hereditary or 'variant' form (vATTR-CM) caused by a g...