Table 2

Estimated annual case numbers of intra-arterial ischemic stroke interventions at the top 100, 200, and 500 volume stroke hospitals if they intervened as frequently as groups at Massachusetts General Hospital and St. Luke's Brain and Stroke Institute, Kansas City, Missouri

100 top stroke hospitals3200–12 900
200 top stroke hospitals5400–21 700
500 top stroke hospitals10 400–41 500