What is the etiology for hellp syndrome?

Severe Pre Eclampsia. Hellp syndrome is a form of severe pre eclampsia that is characterized by elevated blood pressures +protein in the urine, he - hemolysis (the breakdown of red blood cells), el-elevated liver enzymes and lp-low platelet count. Patients may experience severe headaches, blurred vision, abdominal pain, nausea, swelling... Most often this occurs late in the pregnancy. The cause for hellp is unknown.