Mechanisms of Left Ventricular Dysfunction Assessed by Layer-Specific Strain Analysis in Patients With Repaired Tetralogy of Fallot

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Author(s)

Abstract

<p><b><i>Background:</i></b>Left ventricular (LV) dysfunction in patients with repaired tetralogy of Fallot (rTOF) is an important risk factor for adverse outcomes. The aim of this study was to assess the details and time course of such LV dysfunction using layer-specific strain analysis by echocardiography.</p><p><b><i>Methods and Results:</i></b>The 66 patients with rTOF (mean age, 16.3±9.3 years) were divided into 3 groups (T1: 4–10 years, T2: 11–20 years, T3: 21–43 years), and 113 controls of similar age (mean age, 17.2±9.3 years) were divided into 3 corresponding groups (C1, C2, and C3). Layer-specific longitudinal strain (LS) and circumferential strain (CS) of 3 myocardial layers (endocardial, midmyocardial, and epicardial) were determined by echocardiography. Basal and papillary endocardial CS values were decreased in T1 compared with C1. With the exception of papillary epicardial CS, basal/papillary CS and LS of all 3 layers decreased in T2 compared with C2. Excepting papillary epicardial CS, all other values were decreased in T3 compared with C3.</p><p><b><i>Conclusions:</i></b>Potential myocardial damage was found in the endocardium at the basal and papillary levels of the LV in young patients with rTOF, extending from the endocardium to the epicardium and from the base to the apex. This is the possible time course of LV dysfunction in patients with rTOF.</p>

Journal

  • Circulation Journal

    Circulation Journal 81(6), 846-854, 2017

    The Japanese Circulation Society

Codes

  • NII Article ID (NAID)
    130005679612
  • NII NACSIS-CAT ID (NCID)
    AA11591968
  • Text Lang
    ENG
  • ISSN
    1346-9843
  • NDL Article ID
    028184332
  • NDL Call No.
    Z54-B860
  • Data Source
    NDL  J-STAGE 
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