The aimof the study is to assess the left ventricle (LV) untwist in healthy children and adolescents born fullterm.Materials and methods.The analysis was carried out in 108 healthy children aged 2 months to 18 years, born full-term. LV untwist is assessed using Speckle Tracking Imaging at the basal and apical level.Results.Four types of LV untwist were identified in children and adolescents. We did not find relation between LV untwist and age, nor with LV index spherical in systole and diastole, LV myocardial mass. The relationship between LV untwisting and LV rotation in systole at basal and apical segments was revealed.Conclusion.The described features of LV loosening are apparently associated with processes of postnatal growth and maturation of heart tissues in children and adolescents.
This literature review analyzes current data on the main stages of child’s heart contractility development from prenatal to postnatal period. The presented information will expand the conventional ideas on the age-related cardiovascular physiology in children, supplementing with relevant knowledge about the patterns of left ventricular mechanics, and the mechanisms affecting child’s heart morphology. In addition, we consider the evolutionary feasibility of the simultaneous existence of various left ventricular mechanics models, which ensure the effective cardiac function in the postnatal period. This is very important for the work of neonatologists, pediatricians, pediatric cardiologists and therapists.
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