Myocardial Fatigue: a Mechano-energetic Concept in Heart Failure

Patrick Tran, Helen Maddock, Prithwish Banerjee

    Research output: Contribution to journalReview articlepeer-review

    9 Citations (Scopus)

    Abstract

    This review combines existing mechano-energetic principles to provide a refreshing perspective in heart failure (HF) and examine if the phenomenon of myocardial fatigue can be rigorously tested in vitro with current technological advances as a bridge between pre-clinical science and clinical practice. As a testament to the changing paradigm of HF pathophysiology, there has been a shift of focus from structural to functional causes, as reflected in its modern universal definition and redefined classification. Bolstered by recent landmark trials of sodium-glucose cotransport-2 inhibitors across the HF spectrum, there is a rekindled interest to revisit the basic physiological tenets of energetic efficiency, metabolic flexibility, and mechanical load on myocardial performance. Indeed, these principles are well established in the study of skeletal muscle fatigue. Since both striated muscles share similar sarcomeric building blocks, is it possible that myocardial fatigue can occur in the face of sustained adverse supra-physiological load as a functional cause of HF? Myocardial fatigue is a mechano-energetic concept that offers a novel functional mechanism in HF. It is supported by current studies on exercise-induced cardiac fatigue and reverse translational science such as from recent landmark trials on sodium glucose co-transporter 2 inhibitors in HF. We propose a novel framework of myocardial fatigue, injury, and damage that aligns with the contemporary notion of HF as a continuous spectrum, helps determine the chance and trajectory of myocardial recovery, and aims to unify the plethora of cellular and molecular mechanisms in HF. [Abstract copyright: © 2022. The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.]
    Original languageEnglish
    Pages (from-to)711-730
    Number of pages20
    JournalCurrent Cardiology Reports
    Volume24
    Issue number6
    Early online date30 Mar 2022
    DOIs
    Publication statusPublished - 1 Jun 2022

    Keywords

    • Myocardial fatigue
    • Cardiomyocytes
    • Metabolism
    • Cardiac energetic
    • Heart failure
    • Mechanical load

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