Hypokinesis means decreased heart wall movement, and that would account for 49% LVEF. Normal LVEF is 55 to 75%, and that is the amount of blood/oxygen pumped into circulation with each heartbeat.. Impaired wall movement can be due to heart muscle cell damage, ischemia (lack of blood flow) to the location noted.
Dilated LV is consistent with hypokenesis as the heart dilates to increase the blood supply to meet blood/oxygen deficit from weaker than normal pumping contractions...increased afterload (occluded vessels, etc.) dilates LV.