Echocardiography: Systolic position of the ventricular septum outer contour, event f, related to event a (before atrial systole, f-a), event b (after atrial systole, f-b) and event d (at the start of septal wall thickening, f-d).
| M-mode | |||
| Person No. | f-a | f-b | f-d |
| 1 | 0 | -1 | -2 |
| 2 | 0 | -1 | -1 |
| 3 | 0 | -1 | -2 |
| 4 | 0 | 0 | -1 |
| 5 | 0 | -2 | -3 |
| 6 | (-3 | -5 | -5) |
| 7 | (-3 | -5 | -5) |
| 8 | 0 | -1 | -2 |
| 9 | -1 | 0 | 0 |
| m | -0.1 | -0.9 | -1.6 |
| +/- I | 0.4 | 0.7 | 1.0 |