Table 7 Normal values of biventricular regional strain by age decades for women
Variables | 21–30 years (n = 40) | 31–40 years (n = 78) | 41–50 years (n = 71) | 51–60 years (n = 34) | 61–70 years (n = 31) | P value |
|---|---|---|---|---|---|---|
LV radial strain (%) | ||||||
 Basal | 33.4 ± 5.4 | 34.6 ± 5.3 | 35.2 ± 5.5 | 37.3 ± 5.4 | 38.8 ± 5.4 | < 0.001 |
 Mid-cavity | 33.0 ± 5.8 | 34.6 ± 6.1 | 34.7 ± 7.5 | 36.1 ± 6.3 | 41.8 ± 5.6 | < 0.001 |
 Apical | 51.0 ± 13.0 | 54.0 ± 8.6 | 53.0 ± 12.5 | 52.2 ± 9.7 | 58.9 ± 10.0 | 0.036 |
LV circumferential strain (%) | ||||||
 Basal | − 19.2 ± 2.1 | − 19.7 ± 1.9 | − 19.8 ± 1.9 | − 20.5 ± 1.6 | − 21.0 ± 1.7 | < 0.001 |
 Mid-cavity | − 19.3 ± 2.1 | − 19.9 ± 2.0 | − 19.8 ± 2.7 | − 20.4 ± 2.1 | − 22.6 ± 1.7 | < 0.001 |
 Apical | − 24.2 ± 3.1 | − 25.2 ± 2.2 | − 24.6 ± 2.9 | − 24.5 ± 2.2 | − 25.9 ± 2.6 | 0.028 |
RV radial strain (%) | ||||||
 Basal | 20.9 ± 7.0 | 20.1 ± 6.2 | 18.6 ± 7.2 | 19.9 ± 6.8 | 23.6 ± 5.7 | 0.013 |
 Mid-cavity | 25.7 ± 8.6 | 25.8 ± 9.2 | 27.0 ± 10.0 | 31.0 ± 8.7 | 34.0 ± 9.7 | < 0.001 |
 Apical | 33.9 ± 15.1 | 36.8 ± 14.8 | 36.7 ± 13.2 | 37.9 ± 11.9 | 44.0 ± 11.8 | 0.040 |
RV circumferential strain (%) | ||||||
 Basal | − 12.0 ± 3.5 | − 11.8 ± 3.1 | − 11.0 ± 3.8 | − 11.7 ± 3.9 | − 13.8 ± 2.8 | 0.006 |
 Mid-cavity | − 15.2 ± 3.9 | − 15.2 ± 3.9 | − 15.7 ± 4.2 | − 17.6 ± 3.7 | − 18.4 ± 3.8 | < 0.001 |
 Apical | − 18.2 ± 5.0 | − 19.2 ± 5.1 | − 19.0 ± 4.8 | − 19.6 ± 4.2 | − 22.1 ± 3.7 | 0.011 |