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Welcome and Introductions
Nowell Fine
MD, SM, FRCPC, FACC, FCCS, FASE, FHFSA
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Faculty
Nowell M. Fine (Chair)
MD, SM, FRCPC, FACC, FCCS, FASE, FHFSA
Clinical Assistant Professor of Cardiac Sciences and
Community Health Sciences
Clinical Director, Libin Cardiovascular Institute
Director of Echocardiography, Heart Failure Cardiologist
Cumming School of Medicine, University of Calgary
Calgary, AB
Michael Heffernan
MD, PhD, FRCPC, FACC
Director, Oakville Cardiologists Inc.
Staff Cardiologist, Oakville Trafalgar Memorial Hospital
Medical Director, Research, Halton Healthcare
Assistant Clinical Professor (adj), McMaster University
Oakville, ON
Margot Davis
MD, MSc, FRCPC
Clinical Assistant Professor, UBC Cardiology
Director, UBC Cardiology-Oncology Program
Vancouver, BC
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Debra Bosley
RN, BScN
Nurse Clinician/ Cardio-Oncology Clinic
Cardiac Sciences, South Health Campus
Member of the Canadian Nurses Association and the
College of Registered Nurses of Alberta
Calgary, AB
John Pasternak (Patient)
MD
Medicine Hat, AB
Disclosures: Dr. Nowell Fine
•Consultancy/speaking fees: Akcea, Alnylam, Pfizer, Sanofi
•Clinical trial participation: Pfizer
Disclosures: Ms. Debra Bosley
•Consultancy/speaking fees: None
•Clinical trial participation: None
Disclosures: Dr. Margot Davis
•Consultancy/speaking fees: Janssen, Novartis, Boehringer-Ingelheim,
Takeda, Pfizer, Akcea, Alnylam, Amgen, Ferring
•Grant funding: Pfizer, Takeda, Boehringer-Ingelheim, Servier, Akcea
Disclosures: Dr. Michael Heffernan
•Consultancy/speaking fees: AstraZeneca, Boehringer Ingelheim,
BMS/Pfizer Alliance, Novartis, Pfizer, Sanofi, Servier, Amgen, Bayer, Bristol-
Myers Squibb
•Clinical trial participation: AstraZeneca, Boehringer Ingelheim, Novartis,
Pfizer, Amgen, Bayer, Merck
•Fiduciary Role: Oakville Cardiologist Inc, Oakville Cardiovascular Research
LP
•Ownership/Partnership/Principal: Oakville Cardiologist Inc, Oakville
Cardiovascular Research LP
Disclosures: Dr. John Pasternak
•Consultancy/speaking fees: None
•Clinical trial participation: Pfizer
Disclosure of Commercial Support
Specific details of relationship:
– This program has received financial support from Pfizer Canada Inc.
in the form of an educational grant
– This program has received in-kind support from Canadian Heart
Failure Society in the form of logistical support
Potential for conflict(s) of interest:
– Speakers have received honoraria from Canadian Heart Failure
Society
– Pfizer Canada Inc. is the manufacturer of a product that will be
discussed in this program
Mitigating Potential Bias
Potential biases are acknowledged and are mitigated by
presenting data supported by national and international
guidelines, and as follows:
• Information presented is evidence-based
• Material has been developed and reviewed by a Planning
Committee
Off-label uses of drugs may be discussed and will be identified as
such by the speaker
Accreditation
This event is an accredited Group Learning Activity (Section 1) as defined by
the Maintenance of Certification Program of the Royal College of Physicians &
Surgeons of Canada and approved by the Canadian Cardiovascular Society.
You may claim a maximum of 0.75 hours.
Learning Objectives
• Recognize the challenges patients face prior to obtaining an ATTR
amyloidosis diagnosis and the importance of early diagnosis
• Review the clinical presentation, treatment, and guidelines for wild-type
ATTR amyloidosis and highlight the importance of a multidisciplinary team
approach
• Integrate contemporary guidelines and treatment options in the care of
patients with wild-type ATTR amyloidosis, whether managed in an
academic centre or in community practice
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Agenda
Topic Facilitator
Welcome and Introductions Dr. Nowell Fine
wtATTR Amyloidosis: A Distinct Disease to Diagnose and Treat Dr. Margot Davis
Diving into the Reality of Managing wtATTR Amyloidosis
Dr. Nowell Fine
Ms. Debra Bosley
Dr. John Pasternak (Patient)
Managing wtATTR in your Own Clinic Dr. Michael Heffernan
Q&A ALL
Closing Remarks Dr. Nowell Fine
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wtATTR Amyloidosis: A Distinct
Disease to Diagnose and Treat
Margot K. Davis
MD, MSc, FRCPC
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Epidemiology of wtATTR
• Accurate population data are limited
• Wild-type disease is far more common than mutant
• Estimated that at least 25% of individuals >80 years of age have
histological evidence of amyloid deposits in the heart
• ATTRwt accounts for ~13% of HFpEF cases in elderly patients (≥60 years
old)
• Clinical features mimic other cardiac pathologies that frequently co-exist in
advanced age, such as hypertensive heart failure and aortic stenosis
ATTR, transthyretin amyloidosis; ATTR-CA, transthyretin cardiac amyloidosis; ATTRwt, wild-type form of transthyretin amyloidosis; CA, cardiac amyloidosis; HFpEF, heart failure with preserved ejection
fraction; TAVR, transcatheter aortic valve replacement.
Connors LH et al. Circulation 2016;133(3):282-290; González-López E et al. Eur Heart J 2015;36(38) 2585-2594; Castaño A et al. Eur Heart J 2017;38(38):2879-2887.
Cardiac Manifestations
Index of Suspicion – Key Features
Pre-contrast T1 Post-contrast T1
ECV LGE
• Increased LV and RV
wall thickness
• Preserved ventricular
size, biatrial
enlargement
• Diastolic dysfunction
• Increased valvular and
interatrial septum
thickness
• Small pericardial
effusion
• Reduced LV GLS,
preserved apical strain
(basal-apical strain
gradient)
• Diffuse transmural or
subendocardial pattern
LGE
• Left atrial LGE
• Elevated native (non-
contrast) T1 mapping
time
• Extracellular volume
expansion (post-
contrast T1 mapping)
• Low voltage (especially
limb leads)
• Pseudo-infarct pattern
• Atrial fibrillation
• Conduction system
disease
• Ventricular ectopy
• Increased myocardial
radiotracer uptake equal
to or greater than bone
(≥Grade 2), or in
quantitative comparison
with the contralateral
lung (HCL ratio ≥1.5)
ECG Echo
CMRI Tc-99m-PYP
Courtesy Dr. James White, Dr. Denise
Chan, University of Calgary
CCS/CHFS
Joint
Position
Statement
Can J Cardiol. 2020 Mar;36(3):322-332
Tc99m-PYP SPECT in Cardiac Amyloidosis
Intense diffuse myocardial uptake in a patient with
ATTR cardiac amyloidosis, grade 2-3 compared with
bone
No/minimal myocardial uptake in a patient with AL
cardiac amyloidosis, or other causes of LVH
ATTR, transthyretin amyloidosis; SPECT, single photon emission computed
tomographyTc99m-PYP, 99mtechnetium pyrophosphate.
J Am Coll Cardiol, 68(12), Falk RH et al., 1323-1341, (2016)
Heart : Contralateral lung ratio >1.5 highly sensitive
(>95%) and specific (>85%) for ATTR cardiac
amyloidosis
ATTR CA AL CA
Planar whole body
scan
With SPECT
Tc99m-PYP (Bone) Scintigraphy Enables the Diagnosis of
Cardiac ATTR Amyloidosis Without the Need for Histology
Study Design
• 1217 patients with suspected cardiac amyloidosis
• Bone scintigraphy and biochemical investigations
AL, light-chain amyloidosis; ATTR, transthyretin amyloidosis; Tc99m-PYP, 99mtechnetium pyrophosphate.
Gillmore JD et al. Circulation 2016;133:2404-2412.
Results
• 857 patients – histologically proven amyloid (374 with endomyocardial biopsies)
• 360 patients – nonamyloid cardiomyopathies
• Myocardial radiotracer uptake on bone scintigraphy was >99% sensitive and 86% specific for
cardiac ATTR amyloid
• False positives almost exclusively from uptake in patients with cardiac AL amyloidosis
• Combined findings of grade 2 or 3 myocardial radiotracer uptake on bone scintigraphy +
absence of a monoclonal protein in serum or urine:
• Specificity and positive predictive value for cardiac ATTR amyloidosis: 100% (CI 98.0-
100)
Overview of Management
Supportive Care in Cardiac Amyloidosis
Recommendation
• We recommend that heart transplantation be considered for select patients with
advanced HF due to cardiac amyloidosis, in whom significant extra-cardiac
manifestations are absent and the risk of disease progression is considered low
and/or amenable to disease modifying therapy (Strong Recommendation,
Moderate-Evidence Quality).
Recommendation
• In the absence of contraindications, we recommend therapeutic anticoagulation in
patients with cardiac amyloidosis and AF, regardless of calculated risk of stroke or
systemic embolism. (Strong Recommendation, Low-Quality Evidence).
Disease-Modifying Therapy in Cardiac
Amyloidosis
Recommendation
• We recommend tafamidis (if available) for patients with ATTR cardiac
amyloidosis and NYHA class I-III symptoms. (Strong Recommendation,
High-Quality Evidence).
Recommendation
• We recommend treatment with a TTR RNA silencing agent (patisiran or
inotersen) for patients with hereditary ATTR amyloidosis with
ambulatory polyneuropathy (Strong Recommendation, High-Quality
Evidence).
Summary of Evidence Deficiencies
Use of beta blockers, ACE/ARB, MRA, (ARNI), CCB, digoxin
Role of liver transplant in era of ATTR disease-modifying therapy
Role of LVAD
Rate vs. rhythm control
Warfarin vs DOAC
Role of prophylactic pacemakers
Role of CRT
Criteria for primary prevention ICD
Emerging Therapeutic Targets of the
Amyloidogenic TTR Cascade
Maurer MS et al. N Engl J Med 2018;379:1007-1016
Randomization, Evaluation, & Outcomes
Maurer MS et al. N Engl J Med 2018;379:1007-1016
Primary Analysis and Components
Maurer MS et al. N Engl J Med 2018;379:1007-1016
* *
Key Secondary End Points
CI, confidence interval.
Adapted from Maurer MS et al. N Engl J Med 2018; Epub ahead of print doi:
10.1056/NEJM/Moa1805689.
Tafamidis: Subgroup Analysis
Conclusions
• ATTR-CM is an underdiagnosed cause of heart disease
• Emerging therapeutic options act at different point in the amyloidogenic TTR cascade:
• Silencers: Agents target suppression of amyloidogenic TTR
• Stabilizers: TTR-stabilizing agents
• Degraders: Removal of already deposited fibrils
• Tafamidis is the first HC-approved disease-modifying therapy for wtATTR-CM with the ability
to prolong survival and improve symptoms in ATTR patients
• Additional therapies and advances in the diagnosis will continue to improve the care of this
challenging and complex population
ATTR, transthyretin amyloidosis; ATTRm, mutated form of transthyretin amyloidosis; TTR, transthyretin.
Q&A
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Diving into the Reality of Managing
wtATTR Amyloidosis
Nowell Fine
MD, SM, FRCPC, FACC, FCCS, FASE, FHFSA
Debra Bosley
RN, BScN
John Pasternak (Patient)
MD
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Caring for the wtATTR Patient:
Clinic and Patient Perspectives
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Debra Bosley, Nurse Clinician
Cardiac Amyloidosis Clinic, University of Calgary
• Multidisciplinary ‘team’ approach to patient care
• Nurse clinician, cardiologist
• Other medical subspecialties – Calgary Amyloidosis Working Group
• Referral review and triage
• Client phone interview
• Review investigations with cardiologist, determine appropriate pre-
appointment testing
• Imaging, AL urine/serum screening
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Cardiac Amyloidosis Clinic
University of Calgary
• Initial appointment
• Need for subsequent investigations – genetic testing
• Management plan – heart failure care, subspecialty referrals, disease-
modifying therapy
• Patient/client education
o Disease course, subtype, symptoms, progression
o Clinic protocols and procedures
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Cardiac Amyloidosis Clinic
University of Calgary
• Follow-up care
• Monitor and interpret follow-up testing, labs, symptoms
• Follow-up on medical subspecialty referrals
• Ongoing education and support for clients/families
• Liaise and coordinate with research team regarding clinical trials
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Dr. John Pasternak
Family Physician, wtATTR Patient
• What are the important considerations from the patient
perspective of?
• Initial consultation and diagnostic work-up
• Follow-up management and care
• What other advice do you have for healthcare providers of
ATTR patients?
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Q&A
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Managing wtATTR in your
own Clinic
Michael Heffernan
MD, PhD, FRCPC, FACC
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Translating Canadian Guidelines into Practice
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Implementing The Guidelines At Your Centre
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Diagnosis: It Begins With An Index of Suspicion
If amyloidosis is not in your
differential diagnosis you will not
make the diagnosis
Awareness of the ATTR Red Flags
Consider using search algorithms in
your EMR to identify patients with
Red Flag features that may have
been overlooked in the past several
years
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AL Amyloid: Ruling Out A Medical Emergency
• AL amyloidosis, a multiorgan disease commonly
affecting the kidney, resulting in nephrotic syndrome
• Cardiac involvement is the second most common
presenting manifestation
• Other organ systems that may be involved include
• Peripheral and autonomic nervous system
• Vasculature
• Liver
• Gastrointestinal tract
• Soft tissues.
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Untreated, the median survival from onset of heart
failure is approximately 6 months, but current
therapies can induce a prolonged remission and
extend life by many years
AL Amyloidosis Screen
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Screening requisition in your EMR ready for use
Immunofixation will reveal an M-protein
sFLC will reveal an abnormal kappa-lambda ratio.
< 0.26 - monoclonal lambda light chain process
> 1.65 - monoclonal kappa light chain process.
Diagnosis: Ruling in ATTR
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Diagnosis: Establishing Cardiac PYP Scanning
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Radiopharmaceutical and Dose: Tc99m Pyrophosphate / 15-20mCi
Imaging Time: 1 hour-post injection
May have to image at 2 hours post injection if the heart : contralateral ratio is
1.3-1.6 (equivocal range) and/or the visual grade is 1 or 2
Acquisition: Planars: Anterior, Left Lateral (8min/750kcts/Zoom 1.5)
SPECT and gated planars (differentiate between myocardial uptake vs blood
pool) should be performed for equivocal studies.
Visual Scoring
Opacity in cavity excludes blood pool
Quantitative Analysis
Cardiac PYP: Stepwise Image Analysis
• Image quality
• Need to see the ribs and sternum clearly
• Visual Scan interpretation
• Note focal hotspots and agreement with sampling windows
• Semi-quantatative interpretation in relation to rib uptake
• Grade 0 to 3
• Quantitative scoring of heart to contralateral lung ratio
• SPECT analysis for equivocal studies
• Rule in or out blood pool false positive
Responding to the PYP Result
Positive
Refer to regional centre for
treatment until this is more
widely available
Would expect local initiation
of therapy in the future
Equivocal
Rescan PYP with SPECT
Perform cardiac MRI
Biopsy
Negative
Consider another etiology
A full-length variant
(Phe64Leu and Thr59Lys) is
an important false negative
and will require a biopsy if
your clinical suspicion is
high
Diagnosis: Genetic
Analysis
• A positive ATTR patient will require genetic testing
• Genetic tests are readily available (similar to the 23andMe
home kit)
• Wide regional variation of accessibility to genetic counselling
• Recognized mutations (hATTR) and wild type (wATTR) are
definitive
• Mutations of unknown significance are just that
• Input of a geneticist is helpful
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Q&A
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