Layers of the left ventricle
| Heart | Specimen | Age | SL (mm) | ML (mm) | DL (mm) | %ML |
|---|---|---|---|---|---|---|
| 1 | TA | 1 month | 0.6 | 4.0 | 1.1 | 71 |
| 2 | TA | 6 years | 0.9 | 9.0 | 1.5 | 78 |
| 3 | TA | 8 years | 1.5 | 11.0 | 2.0 | 78 |
| 4 | N | 36 hours | 1.3 | 3.0 | 1.4 | 53 |
| 5 | N | 2 months | 1.6 | 4.0 | 1.5 | 56 |
| 6 | N | 4 years | 1.9 | 4.8 | 1.6 | 58 |
| 7 | N | 10 years | 1.9 | 5.1 | 1.7 | 58 |
| 8 | N | 32 years | 5.5 | 12.2 | 3.8 | 57 |
| 9 | N | 60 years | 6.0 | 13.0 | 4.0 | 56 |
DL, thickness of deep layer; ML, thickness of middle layer; N, normal heart; SL, thickness of superficial layer; TA, tricuspid atresia; %ML, thickness of the middle layer as percentage of total.