Table 3.
Comparison of 3DE LV strain components of HCM subgroups
| HCM with Moderate Hypertrophy | P values of LVOTO vs. nonobstructive | P values of two LVOTO groups | |||||
|---|---|---|---|---|---|---|---|
| All (n=216) |
Nonobstructive (n=38) |
Provokable LVOTO(n=63) | Resting LVOTO(n=115) | Provokable LVOTO | Resting LVOTO | ||
| GLS, -% | 14.4(12.0, 16.7) | 12.5 (10.0, 13.3) | 15.0 (13.0, 17.0) | 15.0 (12.0, 17.0) | 0.003* | 0.002* | >0.999 |
| GCS, -% | 18.6(16.1, 21.1) | 17.0 (14.0, 18.3) | 18.0 (15.3, 21.0) | 19.0 (17.0, 21.0) | 0.023* | 0.002* | 0.213 |
| GAS, -% | 28.8(24.6, 32.3) | 25.0 (22.0, 29.0) | 29.0 (25.0, 32.8) | 30.0 (26.0, 32.0) | 0.020* | 0.001* | >0.999 |
| GRS, % | 46.6(37.2, 53.5) | 36.5 (32.0, 46.5) | 48.0 (38.0, 54.0) | 48.0 (40.0, 54.5) | 0.012* | 0.001* | >0.999 |
| Peak twist, ° | 12.4(6.6, 17.3) | 6.3 (3.1, 10.4) | 13.2 (7.05, 17.4) | 13.7 (8.4, 19.4) | 0.004* | <0.001* | 0.397 |
| Peak torsion, °/cm | 2.5±1.2 | 1.6 (0.9, 2.2) | 2.5 (1.5, 3.1) | 2.7 (2.1, 3.6) | 0.031* | <0.001* | 0.092 |
Footnote: Data are presented as mean ± standard deviation or median (interquartile range) for continuous variables and number (percentage) for categorical variables. Comparisons among groups were performed using one-way analysis of variance (ANOVA) or the Kruskal-Wallis test for continuous variables, and the chi-square test for categorical variables. *indicates statistic difference is significant (p<0.05). LVOTO: left ventricular outflow tract obstruction, GLS: global longitudinal strain, GCS: global circumferential strain, GAS: global area strain, GRS: global radial strain