Characteristics of the lesions, clinical symptoms and imaging modalities.

Degree of stenosis are reported according to NASCET criteria. Symptomatology is reported as transient ischemic attack (TIA) or stroke. Previous to surgery patients underwent Doppler-ultrasound (Doppler-us) in all cases and another imaging modality that was whether Magnetic Resonance Imaging (MRI) or Computerized Tomography Scanner (CT-scan).Characteristics of the lesions, clinical symptoms and imaging modalities.