Table 1. Abbreviations used throughout the Delphi process and in the consensus document.

Name	Abbreviations
Transcranial Doppler ultrasonography	TCD
Middle cerebral artery	MCA
Anterior cerebral artery	ACA
Posterior cerebral artery	PCA
Internal carotid artery	ICA
Extracranial internal carotid artery	Ex-ICA
Ophthalmic artery	OA
Vertebral artery	VA
Basilar artery	BA
Systolic flow velocity	Vs
Diastolic flow velocity	Vd
Mean flow velocity	Vm
Pulsatility index	PI
Lindegaard ratio	LR
Sviri ratio	SR
Soustiel ratio	SoR