Reversible cerebral vasoconstriction syndrome (RCVS) is a segmental constriction of cerebral arteries which exposes the patient to cerebral ischaemia and haemorrhage. Its pathophysiology is unknown. Disequilibrium in the regulation of the cerebral arterial tone (sympathetic overactivity) seems to be involved . The postpartum period is a frequent contributor to severe RCVS . Since there is no proven treatment, one may consider milrinone, a vasodilator occasionally used for vasospasm treatment after aneurysmal subarachnoid haemorrhage (ASAH) .