A white infarct is due to?

Infarcts are of two types:- 1) Red infarcts (haemorrhagic infarcts) It occurs in the ovary (venous occlusion due to torsion), lung (loose tissue) and small intestine. It has well defined hemorrhagic red margins which later become brown. 2) Pale infarct/white infarct (anaemic infarct) It occurs in solid organs like heart, spleen, liver, kidney, and brain. It has ill-defined pale margins.