Course Content
ATTR-CM Comprehensive Knowledge Assessment
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Module 6: Beyond the Guidelines: Real-World Cases in ATTR Amyloidosis Diagnosis
ATTR cardiac amyloidosis is a complex and evolving field where textbook algorithms often fall short. This case-based module presents five diverse patients whose symptoms, imaging, and pathology illustrate diagnostic nuances not always captured in traditional pathways. Through lessons on discordant imaging, refractory HFpEF, multimodal imaging concordance, hereditary systemic involvement, and rapid progression, learners will explore how to synthesize findings from echocardiography, nuclear imaging, CMR, tissue biopsy, and genetic testing. This module empowers clinicians to apply diagnostic reasoning in challenging presentations and avoid misdiagnosis or treatment delays.
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Introduction
Case 1: Case of Biopsy-Proven Wild-Type ATTR-CM With Discordant Imaging
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Case 2: Multimodality Cardiac Imaging in Managing Transthyretin Amyloid Cardiomyopathy
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Case 3: Hereditary ATTR Presenting With GI and Neurological Symptoms
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ATTR-CM Comprehensive Knowledge Assessment Quiz
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ATTR Cardiac Amyloidosis Clinical Cases
    About Lesson

    When Imaging Disagrees: The Role of Biopsy in Diagnosing ATTR-CM

    When Imaging Disagrees: The Role of Biopsy in Diagnosing ATTR-CM

    Lesson Abstract

    Not all cases of transthyretin cardiac amyloidosis (ATTR-CM) follow the textbook diagnostic pathway. This lesson examines a complex case of wild-type ATTR-CM with discordant imaging results, normal nuclear scintigraphy but abnormal CMR findings, ultimately diagnosed via endomyocardial biopsy. Learners will review diagnostic red flags, limitations of bone scintigraphy, and the interpretive nuances of CMR and laboratory testing. Emphasis is placed on recognizing when to escalate to biopsy and how to integrate all available data in ambiguous or early-stage presentations. This case reinforces that clinical suspicion, even in the face of conflicting test results, must guide definitive diagnosis and early treatment.

    Learning Objectives

    By the end of this lesson, you will be able to:

    1. Recognize the limitations of nuclear scintigraphy in diagnosing ATTR-CM.
    2. Identify CMR findings that raise suspicion for amyloid cardiomyopathy.
    3. Understand the diagnostic value of endomyocardial biopsy in discordant cases.
    4. Interpret mildly abnormal monoclonal screening in the context of ATTR-CM suspicion.
    5. Apply a multidisciplinary approach to diagnostic uncertainty in ATTR-CM.

    Note: All patient images used in this lesson are AI-generated and intended for illustrative purposes only. They do not depict real individuals.

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