I created this form based on the article from Stroke Journal referenced below. Next step is to create a public Excel template or REDCap database template that each neurocritical care unit can use for their own AVM database. Figure below shows screen capture from first page (form is 2 pages long). PDF and DOCX versions of the form area available (see bottom for links to files.)
- BAVM (brain AVM) – preferred over cerebral AVM (CAVM), abnormal tangle of vessels that results in arteriovenous shunting (nonutritive blood flow) demonstrated by 4-vessel cerebral contrast angiography.
- Date of presentation – date on which patient experienced signs or symptoms that led to the medical evaluation
- Index date – medical encounter through which the date of presentation was learned
- diagnosis date – date of definitive diagnosis of BAVM (i.e. date of contrast angiography)
- language cortex – the left hemisphere unless additional clinical data suggets otherwise
- eloquence – locations as per Spetzler-Martin score, plus the thalamus/hypothalamus/basal ganlgia; ??nondominant parietal lobe may be considered eloquent as visuospatial deficits may be under-recognized but disabling
- diffuse nidus – has peninsula or islands of intervening brain
- old BAVM hemorrhage – all instances of CT or MR evidence of bleeding that is not temporally related to imaging for current signs and symptoms
- superficial drainage – all drainage from BAVM is through cortical venous system
- deep drainage – if any of all of drainage is through deep veins
- deep veins – internal cerebral v., basal v., precentral cerebral v.; in the posterior fossa, only cerebellar hemispheric veins that drain directly into straight sinus, torcula or transverse sinus are considered superficial
- venous stenosis – narrowing of any draining vein outflow pathway in 2 angiographic views; %stenosis – narrowest diameter of vein (in mm) divided by largest diameter of vein prox to stenosis (in mm)
- venous ectasia – any change in venous caliber in the venous runoff or drainage from BAVM with a >2-fold caliber change in any draining venous channel.
- sinus thrombosis – defect in dural venous sinus, excludes arachnoid granulations
- feeding vessel – arterial structure that angiographically demonstrates a contribution of flow to the AV shunt
- feeding arteries – parent arteries that give rise to vessels that supply flow to BAVM
- penetrators / perforators – vessels that are normally end arteries
- flow-related aneurysm – aneurysm lies on a pathway that carries non-nutritive blood flow supplying BAVM
- nidal aneurysm – aneurysm contiguous with the vascular mass
- proximal – located on the vessel or branch points of circle of Willis or proximal to it
- distal – refers to more distal locations beyond the circle of Willis
“Reporting Terminology For Brain Arteriovenous Malformation Clinical And Radiographic Features For Use In Clinical Trials”. Stroke 32.6 (2001): 1430-1442. Web.