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  • Impact of high-intensity endurance exercise on regional left and right ventricular myocardial mechanics

    Author(s)
    Stewart, Glenn M
    Chan, Jonathan
    Yamada, Akira
    Kavanagh, Justin J
    Haseler, Luke J
    Shiino, Kenji
    Sabapathy, Surendran
    Griffith University Author(s)
    Sabapathy, Surendran
    Kavanagh, Justin J.
    Stewart, Glenn
    Chan, Jonathan H.
    Year published
    2017
    Metadata
    Show full item record
    Abstract
    Aims: Strenuous endurance exercise acutely increases myocardial wall stress and evokes transient functional cardiac perturbations. However, it is unclear whether exercise-induced functional cardiac disturbances are ubiquitous throughout the myocardium or are segment specific. The aim of this study was to examine the influence of high-intensity endurance exercise on global and segmental left (LV) and right (RV) ventricular tissue deformation (strain). Methods and results: Echocardiography was used to measure strain in 23 active men (age: 28 ± 2 years; VO2 peak: 4.5 ± 0.7 L min−1) at rest and during a standardized low-intensity ...
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    Aims: Strenuous endurance exercise acutely increases myocardial wall stress and evokes transient functional cardiac perturbations. However, it is unclear whether exercise-induced functional cardiac disturbances are ubiquitous throughout the myocardium or are segment specific. The aim of this study was to examine the influence of high-intensity endurance exercise on global and segmental left (LV) and right (RV) ventricular tissue deformation (strain). Methods and results: Echocardiography was used to measure strain in 23 active men (age: 28 ± 2 years; VO2 peak: 4.5 ± 0.7 L min−1) at rest and during a standardized low-intensity exercise challenge, before and after a 90-min high-intensity endurance cycling intervention. Following the cycling intervention, LV and RV global strain decreased at rest (LV: −18.4 ± 0.4% vs. −17.7 ± 0.4%, P < 0.05; RV: −27.6 ± 0.7% vs. −26.4 ± 0.6%, P < 0.05) and by a greater extent during the low-intensity exercise challenge (LV: −21.3 ± 0.4% vs. −19.2 ± 0.5%, P < 0.01; RV: −28.4 ± 0.8% vs. −23.5 ± 0.9%, P < 0.01). Reductions in LV strain were unique to regions of RV attachment (e.g. LV septum: −24.4 ± 0.5% vs. −21.4 ± 0.6%, P < 0.01) with lateral (−18.9 ± 0.4% vs. −18.4 ± 0.5%) and posterior segments (−19.5 ± 0.4% vs. −18.8 ± 0.7%) unaffected. Similarly, augmentation of strain from rest to exercise was abolished in the RV free wall (−1.1 ± 1.0% vs. 2.9 ± 1.2%, P < 0.01), reduced in the septum (−4.6 ± 0.4% vs. −2.4 ± 0.5%, P < 0.01), and unchanged in the lateral (−1.2 ± 0.6% vs. −0.9 ± 0.6%) and posterior walls (−1.7 ± 0.6% vs. −1.3 ± 0.7%). Conclusion: Changes in ventricular strain following high-intensity exercise are more profound in the right ventricle than in the left ventricle. Reductions in LV strain were unique to the septal myocardium and may reflect ventricular interactions secondary to exercise-induced RV dysfunction.
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    Journal Title
    European Heart Journal – Cardiovascular Imaging
    DOI
    https://doi.org/10.1093/ehjci/jew128
    Note
    This publication has been entered into Griffith Research Online as an Advanced Online Version.
    Subject
    Cardiovascular medicine and haematology not elsewhere classified
    Publication URI
    http://hdl.handle.net/10072/143135
    Collection
    • Journal articles

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