Brett Sperry, MD Profile picture
Aug 24, 2018 9 tweets 6 min read Twitter logo Read on Twitter
16/
Sorry @venkmurthy @onco_cardiology @IbrahimMSaeed1 and others but #WhyCMR is not on this algorithm. Though, it is used frequently as a “catch all” diagnostic test for various cardiomyopathies.
17/
I use cardiac MRI frequently for non-invasive evaluation in AL. Still, you will need biopsy proof of amyloid somewhere in the body before most hematologists will treat.

Amazing summary image by NAC group in London: ncbi.nlm.nih.gov/pubmed/29929616
18/
SPECIAL POPULATIONS

Aortic stenosis: ATTR and AS coexist in the elderly. Common cause of LFLG AS. We have described this @maz_hanna @ClevelandClinic as well as @JoaoLCavalcante, NAC, Columbia, +more. 16% of TAVRs and 30% of LFLG AS with EF<50% may have ATTR.
19/
Carpal tunnel syndrome: about 10% of patients will have Congo red in tenosynovial tissue at time of surgery and some will have cardiac involvement. Opportunity for early diagnosis, monitoring, treatment. 2 abstracts at ISA meeting and publication from us in the coming weeks.
20/
Hypertensive patients with renal disease, particularly African Americans, will have an echo that mimics amyloidosis including apical sparing strain pattern. Don’t be fooled!
21/
PROGNOSIS
Staging systems from @MarthaGrogan1 @ADispenzieri @MorieGertz at @MayoClinic involve Troponin T, NTproBNP, and free light chain difference (for AL). Diagnosing subtype is important due to difference in prognosis!
22/
TREATMENT

Mainstay of therapy in AL with symptomatic HF is CyBorD (cyclophosphamide, bortezomib, and dexamethasone). Daratumumab if +myeloma. High dose melphalan + autologous stem cell transplant in those with lower Mayo stage and lower # organs involved. (evolving)
23/
Treatment in ATTR is very exciting. Onpattro (patisiran) just approved by FDA from @Alnylam. Results of ATTR-ACT for tafamidis from @Pfizer expected within the week at #ESCCongress. Inotersen @Akceatx coming soon.
24/24
Lots of nuance to many of these points, but I hope this was a helpful general overview and primer on #amyloidosis. The future is bright in this “rare” disease!

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More from @BrettSperryMD

Aug 24, 2018
1/
As #ESCCongress nears, I thought I would do a #tweetorial on amyloidosis. Exciting times for the field and new data/treatments expected next week.

#FITSurvivalGuide #CardioTwitter @tony_breu @rodney_falk @marthagrogan1 @amyloidosisfdn @AmyloidosisSupp @Amyloidosis_ARC
2/
What is amyloidosis?

A protein misfolding disorder in which one of thirty-five distinct proteins pathologically misfolds and aggregates extracellularly as insoluble amyloid fibrils, ultimately leading to organ dysfunction.
3/
You can see that other diseases like Alzheimer’s involve amyloid deposition. We will focus on two types of amyloidosis that affect the heart and nervous system: immunoglobulin light chain (AL) and transthyretin (ATTR) amyloidosis.
Read 16 tweets

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