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Genetic Analysis of Hereditary Transthyretin Ala97Ser Related Amyloidosis
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Conduction system disease in cardiac amyloidosis

Ala' Assaf1, Mario Mekhael1, Charbel Noujaim1

  • 1Tulane Research Innovation for Arrhythmia Discovery (TRIAD), Tulane University School of Medicine, New Orleans, LA, USA.

Trends in Cardiovascular Medicine
|February 22, 2023
PubMed

Insights

Cardiac amyloidosis significantly impacts heart electrical activity, commonly causing atrial fibrillation and increasing clotting risks. Understanding these effects is crucial for managing cardiac amyloidosis patients.

Area of Science:

  • Cardiology
  • Electrophysiology
  • Cardiac Electrophysiology

Background:

  • Cardiac amyloidosis (CA) profoundly affects the heart's conductive system.
  • Atrial fibrillation is the most frequent electrophysiological abnormality in CA, linked to increased mortality and hospitalizations.
  • Thromboembolic risk is elevated in CA patients, even without atrial fibrillation, and atrioventricular nodal disease is common.

Purpose of the Study:

  • To review the diverse effects of cardiac amyloidosis on the cardiac conductive system.
  • To discuss the implications for arrhythmia management and therapeutic strategies.

Main Methods:

  • Literature review of studies on cardiac amyloidosis and its electrophysiological manifestations.
  • Analysis of data regarding atrial fibrillation, thromboembolism, and ventricular arrhythmias in CA.
  • Evaluation of current and emerging treatment modalities.

Main Results:

  • Atrial fibrillation is the most common manifestation, associated with poor outcomes.
  • Thromboembolism risk is high, irrespective of atrial fibrillation or CHA2DS2-VASc score.
  • Atrioventricular nodal disease is prevalent and may precede CA diagnosis.
  • The role of implantable cardioverter defibrillators and the impact of new CA therapies on the conductive system require further investigation.

Conclusions:

  • Cardiac amyloidosis presents complex challenges for cardiac electrophysiology and patient management.
  • Further research is needed to clarify arrhythmia incidence, optimize device therapy, and understand the electrophysiological effects of novel CA treatments.

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