Table 2.
Procedural Characteristics
| Procedural characteristics | Overall N=291 | Optimal N=103 | Mixed N=125 | Poor N=63 | P value |
|---|---|---|---|---|---|
| Number of clips | |||||
| Total | 1.5 [0.6] | 1.4 [0.5] | 1.5 [0.6] | 1.7 [0.7] | 0.001* |
| 1 clip | 156 (53.6) | 66 (64.1) | 63 (50.4) | 27 (42.9) | 0.01* |
| >1 clip | 135 (46.4) | 37 (35.9) | 62 (49.6) | 36 (57.1) | |
| Type of MitraClip | |||||
| Old generation | 115 (39.5) | 37 (35.9) | 51 (40.8) | 27 (42.9) | 0.52 |
| NT classic | 15 (5.1) | 4 (3.9) | 6 (4.8) | 5 (7.9) | 0.55 |
| NTR | 31 (10.7) | 11 (10.7) | 13 (10.4) | 7 (11.1) | 0.81 |
| XT | 13 (4.4) | 4 (3.9) | 7 (5.6) | 2 (3.2) | 0.80 |
| NTW | 40 (13.7) | 9 (8.7) | 20 (16.0) | 11 (17.5) | 0.38 |
| XTW | 65 (22.3) | 30 (29.1) | 21 (16.8) | 14 (22.2) | 0.07 |
| XTR | 55 (18.9) | 20 (19.4) | 25 (20.0) | 10 (15.8) | 0.88 |
| Fluoroscopy time, min | 23.0 [17.2] | 20.4 [11.1] | 22.4 [13.5] | 28.3 [27.7] | 0.01* |
| LAP, mm Hg | 20.0 [8.1] | 17.5 [7.4] | 21.3 [8.7] | 22.7 [7.3] | <0.001* |
| V‐wave, mm Hg | 35.0 [17.0] | 31.1 [16.6] | 35.8 [17.0] | 39.5 [17.3] | 0.008* |
| Postclip | |||||
| MR severity ≥moderate | 48 (16.6) | 0 (0) | 20 (16.0) | 28 (44.4) | <0.001* |
| LAP, mm Hg | 15.1 [5.9] | 12.5 [4.9] | 15.8 [5.6] | 18.3 [6.2] | <0.001* |
| V‐wave, mm Hg | 22.0 [9.4] | 17.7 [7.6] | 22.7 [9.0] | 27.9 [9.8] | <0.001* |
| Transesophageal echocardiography‐derived transmitral mean pressure gradient | 3.4 [1.4] | 2.7 [1.1] | 3.5 [1.4] | 4.3 [1.5] | <0.001* |
| Difference pre‐ and post | |||||
| MR reduction (grade) | 2.7 [0.8] | 2.9 [0.6] | 2.7 [0.8] | 2.2 [1.0] | <0.001* |
| LAP reduction, mm Hg | 5.1 [6.9] | 5.2 [6.3] | 5.7 [7.5] | 3.9 [6.7] | 0.26 |
| V‐wave reduction, mm Hg | 13.5 [15.0] | 14.0 [15.4] | 13.5 [14.2] | 12.8 [16.2] | 0.90 |
Values are expressed as mean [SD] or N (%). LAP indicates left atrial pressure; and MR, mitral regurgitation.
*
P value is significant if <0.05.