Table 3 The SD and required sample size to show a clinical change with a power of 90% and an α error of 0.05 to detect a change of the V_ed and V_es of 10 ml and an absolute change in the EF of 3% for SA images before and after registration.¹

10 ml change in V _ed

5.8

7.1 (8)

4.2

3.7 (4)

48%

10 ml change in V _es

3.4

2.4 (3)

1.8

0.7 (1)

71%

3% absolute change in EF

1.9

8.4 (9)

1.3

3.9 (4)

53%