Table I. Ex vivo study, chordal tension measurements.
The decrease in tensions (in Newton, N) before and after MVP creation in 11 pig hearts for 3 pre-specified LV pressure levels (50, 75, 100 mmHg) is demonstrated for the anterior (A) and posterior (P) AML secondary chordae as well as for the total chordal tension (A+P).
| Chordae | Before (N) | After (N) | Decrease (%) | P |
|---|---|---|---|---|
| 50 mmHg | ||||
| Anterior | .35±.25 | .21±.13 | 34.7±27.9 | .005 |
| Posterior | .31±.21 | .20±.16 | 31.5±26.8 | .014 |
| Total | .63±.36 | .41±.27 | 39.0±15.1 | <.001 |
| 75 mmHg | ||||
| Anterior | .61±.36 | .36±.22 | 36.4±20.5 | <.001 |
| Posterior | .50±.33 | .34±.26 | 31.2±28.4 | .01 |
| Total | 1.1±.58 | .69±.44 | 36.5±16.0 | <.001 |
| 100 mmHg | ||||
| Anterior | .83±.41 | .54±.31 | 36.1±15.4 | <.001 |
| Posterior | .69±.46 | .49±.37 | 29.3±23.9 | .005 |
| Total | 1.52±.74 | 1.02±.62 | 34±13.0 | <.001 |