Degree and associated mechanism of mitral regurgitation (MR) among screened low-risk and high-risk children
| MR grade | Low-risk cohort (n=359) Mechanism of MR | High-risk cohort (n=400) Mechanism of MR | ||||||||
| ISS (n/%) | MVP/MVP-spectrum (n/%) | Pseudoprolapse (n/%) | Indeterminate (n/%) | Total* (n/%) | ISS (n/%) | MVP/MVP-spectrum (n/%) | Pseudoprolapse (n/%) | Indeterminate (n/%) | Total* (n/%) | |
| MR (All) | 55 (53.4) | 1 (1) | 0 (0) | 47 (45.6) | 103 (28.7) | 49 (49) | 5 (5) | 2 (2) | 44 (44) | 100 (25) |
| MR (1 cm<2 cm) | 34 (50) | 1 (1.5) | 0 (0) | 33 (48.5) | 68 (18.9) | 28 (49.1) | 3 (5.3) | 0 (0) | 26 (45.6) | 57 (14.3) |
| MR (≥2 cm) | 15 (65.2) | 0 (0) | 0 (0) | 8 (34.8) | 23 (6.4) | 12 (60) | 2 (10) | 2 (10) | 4 (20) | 20 (5) |
| MR (WHF path) | 11 (78.5) | 0 (0) | 0 (0) | 3 (21.4) | 14 (3.9) | 11 (84.6) | 0 (0) | 2 (15.4) | 0 (0) | 13 (3.3) |
*Calculated as a percentage of the entire cohort.
ISS, inter-scallop separation; MVP, mitral valve prolapse; WHF path, World Heart Federation ‘pathological MR’ on comprehensive study.