Babies born at less than 37 weeks gestation (premature) have different nutritional needs than babies born at full term (after 38 weeks). Premature babies will often stay in the neonatal intensive care unit. There they are watched closely to make sure they are getting the right balance of fluids and nutrition.
Indeed, hypotension may result in low flow or so-called watershed infarctions, and more significantly, it may augment injury from other causes. Due to the limitation of retrospective design, the study did not review the link between postoperative hypotension and the occurrence of stroke.
Stroke can be caused by either blockage of blood vessels in the brain (by clots that have either formed in the brain or that were formed elsewhere and migrated to the brain) or by bleeding in or around the brain (from burst arteries due to weak spots in the artery wall or due to high blood pressure).