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Effects of Frame Rate on Two‐Dimensional Speckle Tracking–Derived Measurements of Myocardial Deformation in Premature Infants

Frame rate (FR) of image acquisition is an important determinant of the reliability of 2‐dimensional speckle tracking echocardiography (2DSTE)‐derived myocardial strain. Premature infants have relatively high heart rates (HR). The aim was to analyze the effects of varying FR on the reproducibility of 2DSTE‐derived right ventricle (RV) and left ventricle (LV) longitudinal strain (LS) and strain rate (LSR) in premature infants.