MRI Variables in Segments from Healthy Volunteers and in Patient Segments With and Without 201TI Defects
| Variable | Healthy volunteers (n = 74) | Patients | |
|---|---|---|---|
| No 201TI defects (n = 67) | 201TI defects (n = 21) | ||
| Thickness (cm) | 0.99 ± 0.15* | 1.23 ± 0.33* | 0.88 ± 0.30 |
| Curvature radii (cm)† | |||
| Circumferential | 3.2 ± 1.2 | 4.2 ± 1.7 | 3.3 ± 1.6 |
| Meridional | 20 ± 41* | 13 ± 21 | 6 ± 4 |
| Diastolic wall tension index‡ (N · m−1 · mm Hg−1) | 3.2 ± 1.2* | 3.3 ± 1.1* | 2.5 ± 1.0 |
| Diastolic wall stress index‡ (hN · m−2 · mm Hg−1) | 3.2 ± 1.6 | 2.8 ± 1.2 | 3.0 ± 1.4 |
↵* P < 0.05 for comparisons with segments that have 201TI SPECT defects.
↵ † Apical segments, which are not analyzed using meridional and circumferential curvature radii, are excluded.
↵ ‡ End-diastolic wall tension and wall stress were calculated for standard value of 1 mm Hg of left ventricular hydrostatic pressure at end-diastole.