My father Om Parkash Babbar from Punjab AGE 62 ,MALE,SLIM.PTCA IN 2002.CABG IN 2008,now latest 2D echo report shows LVEF 18% which is very low than 2 years earlier ,it was 30% then. Now doctor has changed some medicine.can LVEF be increased with medicines? how critical is LVEF ratio? ECHO report as :LV is dilated with regional wall motionabnormality.MILD mitral regurgitation.Other cardiac valves are Structurally normal.LV apical clot.Pericardium is Normal. pls suggest.in anticipation.thanx in advance,warm regards,rajesh babbar.