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Table 3 Strain and Torsion

From: Cardiovascular magnetic resonance based diagnosis of left ventricular non-compaction cardiomyopathy: impact of cine bSSFP strain analysis

 All patients and healthy subjectsSubgroup ASubgroup BSubgroup CSubgroup DA vs. BA vs. CA vs. DC vs. D
All LVNC phenotype patientsAll healthy volunteersp-valuesLVNC phenotype patients (normal LV volumetrics)Healthy subjects (normal LV volumetrics)Healthy subjects (normal LV volumetrics, not meeting any LVNC criteria)Healthy subjects (normal LV volumetrics, meeting one or more LVNC criteria)p-valuesp-valuesp-valuesp-values
(n = 59)(n = 36) (n = 25)(n = 34)(n = 16)(n = 18)    
GRS (%)a26.4 (21.8, 32.7)37.1 (33.4, 43.1)< 0.00131.2 (28.2, 34.7)37.5 (34.2, 43.5)40.2 (35.5, 44.3)35.8 (33.1, 40.8)< 0.001< 0.0010.0060.103
Basal RS (%)a26.8 (21.2, 30.7)34.6 (31.0, 39.1)< 0.00128.8 (27.4, 36.1)34.6 (31.4, 39.1)35.3 (33.9, 40.9)32.0 (30.3, 35.6)0.0040.0020.1120.044
Mid RS (%)a23.9 (19.7, 28.9)29.9 (24.9, 35.9)< 0.00128.5 (24.7, 31.8)30.5 (25.8, 36.2)32.4 (29.5, 37.1)26.6 (24.0, 35.5)0.0650.0080.5160.087
Apical RS (%)a29.4 (24.0, 37.3)46.4 (40.1, 56.4)< 0.00133.3 (29.4, 42.2)47.3 (41.8, 58.2)49.2 (42.8, 59.8)45.6 (40.3, 51.4)< 0.001< 0.0010.0020.451
GCS (%)b−16.5 (−14.7, −18.6)−20.5 (−19.1, −22.1)< 0.001−18.5 (−16.8, −19.8)−20.6 (−19.3, −22.1)−21.5 (−20.1, −22.9)−20.0 (−18.8, −21.7)< 0.001< 0.0010.0050.073
Basal CS (%)b−16.3 (−14.2, −18.1)−19.6 (−18.4, −21.1)< 0.001−17.4 (−16.6, −20.0)−19.6 (−18.4, −21.2)−20.1 (−19.3, −21.7)−18.5 (− 18.2, − 20.0)0.0030.0020.0720.027
Mid CS (%)b−15.5 (−13.4, −17.8)− 18.3 (− 16.1, − 20.3)< 0.001−17.5 (− 16.1, − 18.9)− 18.6 (− 16.5, − 20.4)− 19.4 (− 18.1, − 21.0)−17.2 (−15.9, − 19.9)0.0610.0050.6580.079
Apical CS (%)b−17.8 (−15.4, − 19.9)−23.4 (− 21.9, −25.9)< 0.001− 19.4 (− 17.8, − 22.2)−23.7 (− 22.3, − 26.3)−24.4 (− 22.6, −26.6)−23.0 (− 22.0, −24.5)< 0.001< 0.001< 0.0010.270
GLS (%)b−14.6 (−12.9, − 16.5)− 17.1 (− 16.1, − 18.7)< 0.001− 16.4 (− 15.3, − 17.3)−17.1 (− 16.2, − 19.0)−17.2 (− 16.7, − 19.6)− 16.9 (− 16.1, − 18.3)0.0110.0090.0990.143
4-chamber LS (%)b−14.7 (− 12.9, − 16.9)−18.1 (− 16.8, − 19.5)< 0.001−16.0 (− 14.6, − 16.6)−16.7 (− 15.4, − 18.4)− 17.6 (− 16.2, − 20.4)−16.2 (− 15.0, − 17.3)0.0210.0030.3130.032
3-chamber LS (%)b−14.7 (− 12.5, − 16.5)−17.5 (− 15.9, − 19.1)< 0.001− 16.4 (− 14.9, − 17.9)− 17.6 (− 16.1, − 19.1)−17.8 (− 16.4, − 19.3)− 17.3 (− 16.0, − 18.6)0.0460.0480.1680.427
2-chamber LS (%)b−14.8 (−13.2, − 16.7)− 17.6 (− 16.3, − 19.3)< 0.001− 16.7 (− 14.8, − 18.5)−17.6 (− 16.4, − 19.2)−17.7 (− 16.3, − 18.7)−17.5 (− 16.4, − 19.4)0.0340.1090.0550.717
Global Torsion (°/cm)b1.01 (0.68, 1.43)0.94 (0.74, 1.54)0.7651.23 (0.99, 1.47)0.98 (0.78–1.55)1.01 (0.86, 1.75)0.93 (0.71, 1.42)0.4700.8520.1840.178
  1. Data presented as median (IQR)
  2. LVNC left ventricular non-compaction cardiomyopathy, LV left ventricle, GRS global radial strain, RS radial strain, GCS global circumferential strain, CS circumferential strain, GLS global longitudinal strain, LS longitudinal strain
  3. aIndependent samples t-test
  4. bWilcoxon rank sum test