Reference values for left and right ventricular systolic-to-diastolic duration ratio (SDR) found using both spectral and tissue Doppler of fetal heart between 20 and 36+6  weeks of gestation

ConclusionsReference values for SDR SEP, LV, and RV using spectral and tissue Doppler of fetal heart were established between 20 and 36+6  weeks of gestation.
Source: The International Journal of Cardiovascular Imaging - Category: Radiology Source Type: research