Table 1:

Summary of dependent variables in 10 consecutive patients who underwent basilar artery stenting for symptomatic athero-occlusive disease

Patient-related variables
    Age >70 years
    Pre-existing history of diabetes
    Pre-existing history of significant heart disease
    Indication for stenting
    Rate of onset of index event (abrupt vs progressive)
    Recent failed balloon angioplasty
    Preoperative acute/subacute infarction
Technique-related variables
    Experience (procedure performed 1999–2000 versus 2001–2003)
    Primary stenting (versus pre-dilation of target lesion with angioplasty balloon)
    More than one stent implanted
    Type of anesthesia (general versus conscious sedation)
    Major branch artery jailed by stent construct
    Residual stenosis <20%
Perioperative antithrombotic therapy
    Preloaded with clopidogrel before procedure
    Intraoperative anticoagulation with documented activated clotting times ≥250 seconds
    Intraoperative IIb/IIIa inhibitors
    Postoperative IIb/IIIa inhibitors ≥12 hours
    Postoperative anticoagulation with heparin and/or warfarin for ≥48 hours
    Postoperative maintenance therapy with dual antiplatelet agents
Anatomic characteristics
    Lesion location
    Lesion extension across basilar artery branch ostia
    Number of patent vertebral arteries contributing to basilar circulation
    At least moderate stenosis affecting 2 or more major basilar artery branches
    At least 1 posterior communicating artery giving collateral flow to the basilar artery
Lesion characteristics
    Mori classification
    Pretreatment stenosis ≥80%
    Lesion ulceration
    Prestent lesion lumen ≤0.5 mm
    Lesion length >10 mm
    Lesion angle >45°