L left
LAD left axis deviation or left anterior descending
LAE left atrial enlargement
LAHB left anterior hemiblock
LAP left atrial pressure or leukocyte alkaline phosphatase
LBBB left bundle branch block
LDH lactate dehydrogenase
LE lupus erythematosus
LIH left inguinal hernia
LLL left lower lobe
LMP last menstrual period
LNMP last normal menstrual period
LOC loss of consciousness or level of consciousness
LP lumbar puncture
LPN licensed practical nurse
LUL left upper quadrant
LV left ventricle
LVEDP left ventricular end diastolic pressure
LVH left ventricular hypertrophy