We don't have synonyms for ischaemias yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are ischaemia, ischemias and ischemia.
(n) :
(cardiology, pathology) Alternative spelling of ischemia. [(cardiology, pathology) Local disturbance in blood circulation due to mechanical obstruction of the blood supply (for example, embolism, thrombosis, or vasoconstriction).]
(n) :
(cardiology, pathology) Alternative spelling of ischemia. [(cardiology, pathology) Local disturbance in blood circulation due to mechanical obstruction of the blood supply (for example, embolism, thrombosis, or vasoconstriction).]