05/08/2026
What if the strongest clue to cardiac amyloidosis is found outside the heart?
Consider an older patient with heart failure, increased ventricular wall thickness, and no clear explanation.
Now look beyond the echocardiogram.
Do they have bilateral carpal tunnel syndrome?
Peripheral or autonomic neuropathy?
Lumbar spinal stenosis or a previous tendon rupture?
Proteinuria, gastrointestinal symptoms, or unexplained low blood pressure?
Individually, these findings are common and nonspecific. Together, in the right clinical context, they may form a pattern that should raise suspicion for cardiac amyloidosis.
European Society of Cardiology guidance identifies several of these cardiac and extracardiac features as important diagnostic red flags. Their relevance varies by amyloid type, so they should prompt appropriate evaluation rather than be treated as diagnostic on their own.
The practical takeaway is simple:
When cardiac findings do not fully explain the patient’s multisystem history, step back and connect the clues.
Earlier recognition can lead to appropriate testing, accurate amyloid typing, and timely specialist referral.
Which extracardiac clue has most often raised your suspicion of cardiac amyloidosis?
