Table 2.
Myocardial Systolic Descent (Through-Plane Shortening) at Different Regions and Different Slices
| HCM (n=17) | Healthy Controls (n=6) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Slice | Anterior | Lateral | Posterior | Septal | Mean | Anterior | Lateral | Posterior | Septal | Mean |
| 1 | 5.4±2.4 | 7.1±3.1 | 7.7±3.4 | 6.6±2.3 | 6.7±2.9 | 10.2±5.2 | 11.9±3.4 | 12.3±3.4 | 10.8±3.1 | 11.3±3.7 |
| 2 | 3.9±2.1 | 4.5±2.6 | 5.7±2.8 | 5.6±1.9 | 4.9±2.4 | 8.0±4.8 | 9.2±3.4 | 9.6±2.9 | 8.7±2.0 | 8.9±3.3 |
| 3 | 2.4±1.7 | 2.9±2.3 | 4.7±2.3 | 3.8±1.3 | 3.5±2.1 | 5.9±5.2 | 6.6±3.4 | 7.0±3.0 | 5.8±2.8 | 6.3±3.5 |
| 4 | 1.0±1.8 | 1.4±2.0 | 2.3±1.9 | 1.0±1.2 | 1.4±1.8 | 2.4±3.1 | 3.6±2.9 | 3.8±3.1 | 2.4±2.9 | 3.1±2.9 |
HCM indicates hypertrophic cardiomyopathy.
Slice 1 is basal, and slice 4 is apical. There were significant differences in systolic descent between different regions at each level of slices in HCM: posterior>lateral and septal (P<.005, no significant difference between lateral and septal)>anterior (P<.05). Although a similar trend existed (posterior>lateral and septal>anterior), no significant differences were observed between different regions in healthy controls. At each region, this descent was significantly greater in controls than that of patients with HCM (P<.01). The systolic descent decreased from basal to apical slice (P<.001) in both HCM and healthy groups.