Names & Terms You Will Hear
Plain-language meanings for the terms your care team may use.
| Term | Meaning |
|---|---|
| Cardiac amyloidosis | An abnormal protein called amyloid builds up in the heart muscle, making it stiff and thick. |
| ATTR amyloidosis | Transthyretin amyloidosis — the most common cardiac type. Two forms: wild-type (age-related) and hereditary (gene change). |
| AL amyloidosis | Light-chain amyloidosis. Comes from abnormal bone marrow cells. Less common but moves fast — a blood doctor (hematologist) leads care. |
| Transthyretin (TTR) | A protein made by the liver. When TTR folds the wrong way, it builds up in the nerves and the heart. |
| Senile cardiac amyloidosis | An old name for wild-type ATTR. Doctors no longer use this term. |
| Restrictive cardiomyopathy | A stiff-heart pattern. Amyloid makes the heart walls thick and hard to fill, even though the squeeze (ejection fraction) stays normal at first. |
What Is Cardiac Amyloidosis?
- Amyloid is a protein that folds the wrong way. It stacks into fibers and builds up in organs. In the heart, it makes the muscle stiff and thick.
- There are two main cardiac types: ATTR (transthyretin) and AL (light chain). They can look alike on imaging, but they are different diseases with different treatments.
- ATTR-wild-type is the most common form. It mainly affects men over 70. For a long time, doctors missed it as normal aging.
- ATTR-hereditary runs in families. The V122I gene change is more common in Black patients. The V30M change is more common in patients from Portugal, Sweden, or Japan.
- AL comes from abnormal cells in the bone marrow. It moves fast and needs urgent care from a blood doctor (hematologist).
- Many patients have several red flags at once: carpal tunnel in both hands, lower-back spinal stenosis, biceps tendon rupture, a low-voltage EKG, thick heart walls on echo, and unexplained heart failure with a normal squeeze (preserved ejection fraction).
Why It Matters
- Without treatment, cardiac amyloidosis leads to severe heart failure, abnormal heart rhythms, and early death.
- Modern treatment helps. Tafamidis for ATTR reduced deaths by 30% in the ATTR-ACT trial. Quality of life also improves.
- Amyloidosis is often missed. A bone scan (PYP scan) plus a few blood and urine tests can confirm ATTR without a biopsy in most cases.
- AL amyloidosis must be ruled out first. Its drugs are not the same as ATTR drugs — the two types need separate care paths.
- Family members of patients with hereditary ATTR may benefit from gene testing.
Risk Factors
Knowing your personal risks helps your care team take extra precautions.
| Risk Factor | Why It Increases Risk |
|---|---|
| Age over 65 | Wild-type ATTR becomes much more common with age. Up to 25% of men over 85 have some amyloid in the heart. |
| Male sex | ATTR-wild-type is far more common in men than in women. |
| Family history of amyloidosis | Hereditary ATTR is passed down through families. If a parent has it, close relatives should be tested. |
| Black or Caribbean ancestry | The V122I gene change is found in about 3–4% of Black Americans. It raises the risk of ATTR heart disease. |
| Carpal tunnel in both hands | This often appears years before heart symptoms in ATTR. It is a major warning sign. |
| Lower-back spinal stenosis | Amyloid deposits in the spine are common with ATTR. |
| Biceps tendon rupture without injury | Also called the "Popeye sign." A strong clue for ATTR. |
| Multiple myeloma or MGUS | These blood cell disorders raise the risk of AL amyloidosis. |
| Thick heart walls with normal squeeze | If an echo shows walls thicker than 14 mm but a normal squeeze, amyloid should be ruled out. |
Treatment Options
Shown in English for your safety — this section is not automatically translated. Confirm with your doctor or call the office.
- ATTR — tafamidis (Vyndaqel/Vyndamax): keeps the TTR protein stable so it cannot build up. One pill a day. The main drug for ATTR heart disease.
- ATTR — patisiran (Onpattro) and inotersen (Tegsedi): gene-blocking drugs. Approved for ATTR nerve damage and now being studied for the heart.
- ATTR — acoramidis: a newer TTR drug. The FDA approved it in 2024 for ATTR heart disease.
- AL — blood doctor (hematologist) leads care: drugs such as CyBorD and daratumumab are used. Some patients get a stem-cell transplant. AL needs a bone marrow biopsy and blood-cell workup.
- Heart failure care: water pills (diuretics) help with swelling but must be used with care. Amyloid patients respond strongly to even small fluid shifts.
- Drugs to avoid: digoxin can build up to toxic levels. Beta-blockers at high doses, verapamil, and diltiazem can weaken the pump in amyloid. ACE inhibitors can drop blood pressure too far if the nerves are also affected.
- Atrial fibrillation (AFib): very common in amyloid. A blood thinner is usually needed to lower stroke risk.
- Gene counseling: advised for families with hereditary ATTR.
Risks, Benefits, and Alternatives
Shown in English for your safety — this section is not automatically translated. Confirm with your doctor or call the office.
Every choice has trade-offs. Use this table to start the shared decision conversation with your care team.
| Option | Risks | Benefits | Alternatives |
|---|---|---|---|
| Tafamidis (ATTR heart) | Very costly without insurance. Can cause mild diarrhea. Does not treat nerve damage. | Cut deaths by 30% in the ATTR-ACT trial. Slows the disease. One pill a day. Well tolerated. | Acoramidis (newer TTR drug). Supportive care only. |
| Acoramidis (ATTR heart) | Costly. Less long-term data than tafamidis. | Holds TTR more firmly than tafamidis. Trial data show fewer heart events. | Tafamidis. Gene-silencing drugs. Supportive care. |
| Bone scan (PYP) workup | Small radiation dose. Can give a false-positive result in AL amyloidosis. | Confirms ATTR without a biopsy in most patients. Safe and non-invasive. | Heart muscle biopsy (endomyocardial biopsy). Cardiac MRI. |
| Heart muscle biopsy (endomyocardial biopsy) | An invasive procedure. Small risk of bleeding, abnormal heart rhythm, or perforation. | Gives a definite tissue answer when imaging tests are not clear. | PYP bone scan. Cardiac MRI. Rarely needed for ATTR today. |
Common Misconceptions
| Myth | Reality |
|---|---|
| "Amyloidosis is rare — it can't be me." | Wild-type ATTR is more common than people think. Up to 13% of patients with heart failure and a normal squeeze may have amyloid. |
| "My heart squeeze is normal — it can't be amyloidosis." | Cardiac amyloid usually keeps the ejection fraction (squeeze) normal until late in the disease. Thick walls with a normal squeeze is the classic sign. |
| "My carpal tunnel and back problems are not related to my heart." | Carpal tunnel in both hands, spinal stenosis, and biceps tendon rupture are outside-the-heart warning signs for ATTR. They can appear years before heart symptoms. |
| "There is nothing you can do for amyloidosis." | There is now. Tafamidis cuts deaths from ATTR-CM. AL amyloidosis can be treated by a blood doctor. Finding it early helps. |
| "If it is genetic, my children will get it too." | Hereditary ATTR is passed down through families, but not everyone who carries the gene change gets the disease. Treatment also exists. Gene counseling helps families plan. |
| "My bone scan was positive — I need a heart biopsy." | If blood and urine tests for light chains are normal and the PYP scan is grade 2 or 3, most patients get an ATTR diagnosis without a biopsy. |
Possible Complications
Knowing what can go wrong helps you spot problems early. Most complications are uncommon, especially with treatment.
| Where / What | What Can Happen |
|---|---|
| Heart failure | The stiff heart cannot fill well. Shortness of breath and swelling get worse over time. |
| Atrial fibrillation (AFib) | Very common with amyloid. Stroke risk is high — a blood thinner is usually needed. |
| Slow heart rhythm / heart block | Amyloid can slow or block the heart's electrical signals. A pacemaker may be needed. |
| Orthostatic hypotension | A sudden drop in blood pressure when standing up — a sign that the nerves are also affected. |
| Aortic stenosis overlap | Amyloid often occurs together with a tight aortic valve. Both may need to be treated. |
| Nerve damage — neuropathy (ATTR) | Numbness, pain, or falls. If this develops, ask about gene-blocking drugs. |
| Kidney damage (AL more often) | AL amyloid can cause large amounts of protein to leak into the urine. A kidney doctor should follow up. |
Points to Know
Shown in English for your safety — this section is not automatically translated. Confirm with your doctor or call the office.
If you remember nothing else, remember these key points.
- Cardiac amyloidosis can be treated — finding it early matters most.
- Warning signs: carpal tunnel in both hands, lower-back stenosis, biceps tendon rupture, or a thick heart with a low-voltage EKG.
- ATTR and AL look alike but are different diseases. Always test for AL (light chains) first.
- A bone scan (PYP) is the main non-invasive test for ATTR once AL is ruled out.
- Tafamidis cuts ATTR-CM deaths by 30%. Acoramidis is a newer approved option.
- Use water pills carefully. Avoid digoxin and verapamil. Take a blood thinner for AFib.
- Hereditary ATTR runs in families. Close relatives may need gene testing.
When to Call Us — and When to Call 911
Shown in English for your safety — this section is not automatically translated. Confirm with your doctor or call the office.
If you are not sure, call. We would rather hear from you twice than miss a real problem.
- Call 911 for fainting, severe shortness of breath, or chest pain that does not go away.
- Call our office if you gain more than 3 pounds in 2 days or 5 pounds in a week.
- Call our office if your legs swell up or your breathing gets worse with activity.
- Call our office if you feel dizzy or lightheaded when you stand up. This is common in amyloidosis.
- Call our office if you get new numbness, tingling, or pain in your hands or feet.
- Call our office before starting beta-blockers, verapamil, diltiazem, or digoxin. These can be harmful in amyloidosis.
- Call our office if a family member is found to have hereditary ATTR. Gene counseling can help your family plan ahead.
Office: (727) 943-5200
Trusted Resources
Independent, evidence-based pages we recommend for deeper reading.
- Amyloidosis Foundation — Patient community and education.
- AHA — Cardiac Amyloidosis — Patient-facing overview from American Heart Association.
- Cleveland Clinic — Cardiac Amyloidosis — Comprehensive overview.
- Mayo Clinic — Cardiac Amyloidosis — Diagnosis and treatment overview.
- NHLBI — Amyloidosis — Federally sourced patient information.
Sources Used to Build This Guide
- AHA Scientific Statement: Cardiac Amyloidosis (2020) [Scientific Statement] — Definitive overview of ATTR and AL cardiac amyloidosis; diagnostic algorithm and red-flag findings.
- ACC Expert Consensus: Diagnosis and Treatment of Cardiac Amyloidosis (2023) [Guideline / Consensus] — Current US treatment algorithm including tafamidis, patisiran/inotersen, and the gene-silencing era.
- ATTR-ACT trial (tafamidis for ATTR cardiomyopathy) [Randomized trial] — Pivotal RCT showing tafamidis reduces all-cause mortality and cardiovascular hospitalizations in ATTR-CM.
- Mayo Clinic — Cardiac Amyloidosis [Patient education] — Plain-language symptom and diagnosis overview.
- Amyloidosis Foundation [Patient advocacy] — Patient community, support resources, and education materials.
- NHLBI — Cardiac Amyloidosis [Patient education] — Federal patient-education resource.
- Maurer MS et al. Genotype-Specific Treatment Outcomes in ATTR-ACT. [Subanalysis] — Wild-type vs hereditary ATTR response to tafamidis — informs misconceptions about hereditary disease.
- ATTR Amyloidosis Patient and Caregiver Guide (CCF) [Patient education] — Comprehensive plain-language overview from a major academic center.
