Table 3

Comparison of MRI DWI following Boston Lotus and Medtronic CoreValve

Lotus (n=29)CoreValve (n=37)P value
Incidence of new microinfarction (n(%))23(79)22(59) 0.025
Number of new microinfarcts per patient3.5 (IQR 7.0)2.0 (IQR 3.0) 0.002
Mean microinfarct volume per patient (ml)0.36 (IQR 0.57)0.17 (IQR 0.21)0.166
Number of new small lesions (<5 mm) (n(%))124(78)41(72) 0.005
Number of new large lesions (≥5 mm) (n(%))34(22)16(28) 0.036
Number of patients with new ACA lesions (n(%))14(48)2 (5) 0.001
Number of patients with new MCA lesions (n(%))20(69)19(51)0.149
Number of patients with new PCA lesions (n(%))10(34)6 (16)0.086
Number of patients with new VBA lesions (n(%))15(52)7 (19) 0.005
  • ACA, anterior cerebral artery; DWI, diffusion-weighted imaging; MCA, middle cerebral artery; PCA, posterior cerebral artery; VBA, vertebrobasilar artery

  • Statistically significant P values < 0.05 are shown in bold.