Introduction
Methods
Patients
Ethical considerations
MRI examination and image analysis
Echocardiography examination
Statistical analysis
Results
Comparison of baseline characteristics in HCM and control groups
HCM group (N = 76) | Control group (N = 46) |
p value | |
---|---|---|---|
Age(years) | 47.1 ± 12.6 | 44.3 ± 6.9 | 0.116 |
Gender | 0.667 | ||
Male | 50 (65.8 %) | 32 (69.6 %) | |
Female | 26 (34.2 %) | 14 (30.4 %) | |
Heart rate (beats/min) | 70.5 ± 9.4 | 70.4 ± 2.5 | 0.982 |
BSA (m2) | 1.7 ± 0.2 | 1.7 ± 0.1 | 0.707 |
BMI (kg/m2) | 24.1 ± 2.0 | 23.5 ± 1.5 | 0.101 |
SBP (mmHg) | 124.3 ± 6 | 119.5 ± 7.1 | <0.001 |
DBP (mmHg) | 81.8 ± 5.8 | 78 ± 5.1 | <0.001 |
Family history of HCM | 20 (26.3 %) | 0 (0 %) | <0.001 |
Unexplained syncope | 10 (13.2 %) | 0 (0 %) | <0.001 |
Comparison of echocardiography parameters in HCM and control groups
HCM (N = 76) | Control (N = 46) |
p value | |
---|---|---|---|
Bas-Rotation (°) | 8.6 ± 1.8 | 5.5 ± 0.7 | <0.001 |
AP-Rotation (°) | 11.2 ± 2.4 | 7.8 ± 0.6 | <0.001 |
LV-Twist (°) | 19.8 ± 4.0 | 13.2 ± 0.9 | <0.001 |
LVEF (%) | 70.4 ± 6.0 | 67.3 ± 3.8 | 0.001 |
LADs (mm) | 40.6 ± 3.1 | 32.1 ± 2.0 | <0.001 |
LVDd (mm) | 41.0 ± 2.1 | 44.5 ± 1.5 | <0.001 |
LAVi (ml/m2) | 51.3 ± 5.4 | 30.7 ± 2.9 | <0.001 |
IVST (mm) | 20.7 ± 3.0 | 9.0 ± 0.6 | <0.001 |
LVPWT (mm) | 10.9 ± 0.8 | 8.8 ± 0.4 | <0.001 |
RWT | 0.5 ± 0.04 | 0.3 ± 0.01 | <0.001 |
E/A | 1.0 ± 0.3 | 1.3 ± 0.1 | <0.001 |
E/Em | 14.6 ± 3.2 | 8.5 ± 1.1 | <0.001 |
LVMI (g/m2) | 119.1 ± 22.5 | 68.9 ± 7.6 | <0.001 |
GLS | −14.2 ± 1.8 | −18.0 ± 0.4 | <0.001 |
Untwisting velocity | −10.5 ± 1.1 | −13.1 ± 0.4 | <0.001 |
Distribution of characteristics in HCM patients with and without fibrosis
Non-fibrosis (N = 27) | Fibrosis group (N = 49) |
p value | |
---|---|---|---|
Age (years) | 51.7 ± 8.5 | 44.6 ± 13.8 | 0.007* |
Heart rate (beats/min) | 70.7 ± 10.6 | 70.4 ± 8.9 | 0.889 |
BSA (m2) | 1.7 ± 0.2 | 1.8 ± 0.1 | 0.129 |
BMI (kg/m2) | 24.2 ± 1.6 | 24.0 ± 2.3 | 0.693 |
SBP (mmHg) | 123.7 ± 5.9 | 124.6 ± 6.1 | 0.524 |
DBP (mmHg) | 81.4 ± 5.5 | 82.1 ± 5.9 | 0.628 |
Bas-Rotation (°) | 6.7 ± 0.9 | 9.6 ± 1.3 | <0.001* |
AP-Rotation (°) | 8.3 ± 0.9 | 12.7 ± 1.2 | <0.001* |
LV-Twist (°) | 15.0 ± 1.1 | 22.4 ± 2.1 | <0.001* |
LVEF (%) | 70.7 ± 3.7 | 70.2 ± 6.9 | 0.698 |
LADs (mm) | 38.7 ± 1.1 | 41.7 ± 3.3 | <0.001* |
LVDd (mm) | 41.6 ± 1.9 | 40.7 ± 2.1 | 0.052 |
LAVi (ml/m2) | 45.1 ± 2.4 | 54.7 ± 2.9 | <0.001* |
IVST (mm) | 18.3 ± 2.2 | 22.1 ± 2.4 | <0.001* |
LVPWT (mm) | 10.7 ± 0.7 | 11.1 ± 0.8 | 0.02* |
RWT | 0.5 ± 0.04 | 0.5 ± 0.02 | <0.001* |
E/A | 1.2 ± 0.2 | 1.0 ± 0.2 | 0.001* |
E/Em | 11.1 ± 1.6 | 16.6 ± 1.9 | <0.001* |
LVMI (g/m2) | 98.3 ± 10.5 | 130.6 ± 18.8 | <0.001* |
GLS | −16.4 ± 0.9 | −13.0 ± 0.6 | <0.001* |
Untwisting velocity | −11.4 ± 1.1 | −10.0 ± 0.8 | <0.001* |
Univariate and multivariate logistic regression analysis of effect factors for fibrosis in HCM patients
Optimal | Sensitivity | Specificity | AUC |
p value | |
---|---|---|---|---|---|
Cutoff value | (95 % CI) | (95 % CI) | (95 % CI) | ||
LV-twist | ≥18.5 | 98 % (87.8–99.9 %) | 100 % (84.5–100 %) | 0.99 (0.99–1.0) | <0.001 |
GLS | ≥−14.7 | 100 % (92.7–100 %) | 100 % (87.2–100 %) | 1.0 (1.0–1.0) | <0.001 |
E/Em | ≥13.4 | 98 % (89.1–99.9 %) | 96.3 % (81.0–99.9 %) | 0.99 (0.99–1.0) | <0.001 |
LVEF | ≥70.5 | 55.1 % (40.2–69.3 %) | 66.7 % (46.0–83.5 %) | 0.5 (0.4–0.6) | 0.78 |