Abstract Background and introduction Information about optimal use of heparin in flush fluids during endovascular thrombectomy (EVT) for acute ischemic stroke (AIS) is lacking. Variables that determine total heparin dose entering the patient by flush fluids are mostly unknown. We aim to provide insight in these unknown but highly relevant variables. https://www.roneverhart.com/NeOn-Zero-Lefty-M390-BLADE-TITANIUM-HANDLE-MRBS-p11472/