Table 3 Number of basal and apical slices not delineated by the complete beginners (B1, B2) and the intermediate beginner (IB) at end-diastole and end-systole before and after teaching, compared with expert observer E1

Basal end-diastole endocardial

2

2

5

3

4

3

Basal end-systole endocardial

7

1

12

7

6

5

Basal end-diastole epicardial

1

0

3

2

4

2

Basal end-systole epicardial

4

0

9

4

5

3

Apical end-diastole endocardial

6

2

4

4

6

3

Apical end-systole endocardial

8

5

5

3

8

3

Apical end-diastole epicardial

0

1

1

0

0

0

Apical end-systole epicardial

0

0

0

0

1

0