| level | description | reference in book |
|---|---|---|
| 0 myocardial cell | chapter XII, par. 3.2 | |
| 1 conglomerate of cells | 3-dimensional block of model cells | chapter V, par. 3 |
| oscillator | chapter XII, par. 3.3 | |
| fractal | chapter XII, par. 3.5 | |
| 2 conglomerate of level-1 conglomerates | chapter XII, par. 3.6 | |
| relaxation oscillator | chapter IX, par. 2 | |
| 3 the left ventricle | chapter XII, par. 3.7 |