MYOCARDIAL STRAIN RATE BYANATOMIC DOPPLER SPECTRUM: FIRST CLINICAL EXPERIENCE USING RETROSPECTIVE SPECTRAL TISSUE DOPPLER FROM ULTRA-HIGH FRAME RATE IMAGING

摘要

Strain rate imaging by tissue Doppler (TDI) is vulnerable to stationary reverberations and noise (clutter). Anatomic Doppler spectrum (ADS) presents retrospective spectral Doppler from ultra-high frame rate imaging (UFR-TDI) data for a region of interest, that is, ventricular wall or segment, at one time instance. This enables spectral assessment of strain rate (SR) without the influence of clutter. In this study, we assessed SR with ADS and conventional TDI in 20 patients with a recent myocardial infarction and 10 healthy volunteers. ADS-based SR correlated with fraction of scarredmyocardium of the left ventricle (r = 0.68, p <0.001), whereas SR by conventional TDI did not (r = 0.23, p = 0.30). ADS identified scarredmyocardiumand ADS Visualwas the onlymethod that differentiated transmural from non-transmural distribution of myocardial scar on a segmental level (p = 0.002). Finally, analysis of SR by ADS was feasible in a larger number of segments compared with SR by conventional TDI (p < 0.001). (E-mail: Lars.c.nilsen@ntnu.no) (C) 2017World Federation for Ultrasound in Medicine& Biology.