We report that a bias in the assessment of left ventricular function (LVF) is due to the compressed sensing (CS) CINE. In cardiac CINE MRI EDV (or ESV) is assessed when blood volume is a maximum (or a minimum). Practically a time window (given by VPS) is used to reduce scan time. For CS-CINE the time window is expanded by adopting data at nearby cardiac frames. The expanded acquisition window reduces EDV and increases ESV due to time average effect. Note that the changes of the quantities are not random, thus they should be removed for a better diagnosis.