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The ratio of the height of septomarginal trabecula branching from the crista supraventricularis (a) to the height of the interventricular septum (b) in the respective age groups
| a/b | Fetuses | Children | Adults |
|---|---|---|---|
| 1/6 | 0 | 0 | 0 |
| 1/5 | 5 | 2 | 0 |
| 1/4 | 1 | 7 | 6 |
| 1/3 | 14 | 18 | 38 |
| 2/5 | 12 | 28 | 27 |
| 1/2 | 14 | 5 | 21 |
| 3/5 | 11 | 0 | 7 |
| 2/3 | 3 | 0 | 1 |
| 60 | 60 | 100 |
