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Table 6 Mean transvalvular gradients for the main valve sizes by surgeon

From: Effect of surgeon on transprosthetic gradients after aortic valve replacement with Freestyle® stentless bioprosthesis and its consequences: A follow-up study in 587 patients

   Valve Size
   21 mm   23 mm   25 mm  
Surgeons N cases Mean ± StDev [mmHg] Range [mmhg] Mean ± StDev [mmHg] Range [mmHg] Mean ± StDev [mmHg] Range [mmHg]
Trainees 43 19 ± 2.4 0 16 ± 1.8 .- 17 ± 2.3 .-
A 53 24 ± 2.3 20 22 ± 1.7 24 16 ± 2.3 22
B 74 25 ± 1.9 27 21 ± 1.3 35 19 ± 1.8 28
C 280 21 ± 1.1 40 18 ± 0.8 27 16 ± 0.9 28,4
D 41 23 ± 2.7 38 26 ± 1.7 35 19 ± 2.8 35
E 67 20 ± 1.9 25 17 ± 1.4 30 13 ± 1.7 16
F 28 10 ± 8.2 27 12 ± 2.0 19 12 ± 2.6 18
ANOVA   P = 0.1   p < 0.001   P = 0.1