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Table 1

From: Left ventricular twist, but not circumferential-longitudinal shear angle, increases with increasing age in normal subjects

Age Number of subjects (n) Mean peak twist Mean peak CL-shear angle Apical epicardial radius Basal epicardial radius Apical rotation Basal rotation Distance
20-29 yrs 9 10.0±2.4° 4.7±1.5° 22.8±2.8 mm 29.7±6.0 mm 5.3±3.2° -4.7±1.4° 5.6±0.7 cm
30-39 yrs 14 10.0±1.0° 5.0±1.0° 22.1±2.0 mm 31.7±3.2 mm 6.1±1.3° -3.9±1.2° 5.0±0.3 cm
40-49 yrs 7 12.3±3.9° 5.0±1.2° 20.3±2.9 mm 32.0±3.7 mm 7.9±3.5° -4.4±1.3° 5.6±0.7 cm
50-59 yrs 13 11.7±3.9° 5.1±1.6° 20.6±2.8 mm 31.7±2.9 mm 8.6±4.2° -3.1±1.3° 5.2±0.7 cm
60-70 yrs 11 13.6±4.0° 5.6±2.0° 17.5±2.4 mm 28.2±2.5 mm 9.7±4.0° -3.9±1.1° 5.0±0.5 cm
ANOVA P-value   P=0.048 20-29 and 30-39 are statistically different from 60-70 P=0.77 No difference P=0.0002 60-70 statistically different from all other groups P=0.09 No difference P=0.02 20-29 and 30-39 are statistically different from 60-70 And 20-29 is statistically different from 50-59 P=0.07 No difference P=0.03 20-29 is different from 30-39 and 60-70 40-49 is different from 30-39 and 60-70