Table 6 Normal values of biventricular regional strain by age decades for men
Variables | 21–30 years (n = 44) | 31–40 years (n = 100) | 41–50 years (n = 92) | 51–60 years (n = 48) | 61–70 years (n = 28) | P value |
|---|---|---|---|---|---|---|
LV radial strain (%) | ||||||
 Basal | 26.2 ± 5.1 | 29.4 ± 4.4 | 30.0 ± 4.3 | 29.4 ± 5.5 | 33.3 ± 5.5 | < 0.001 |
 Mid-cavity | 28.5 ± 5.3 | 30.9 ± 5.5 | 30.9 ± 5.2 | 30.5 ± 5.2 | 34.7 ± 7.8 | < 0.001 |
 Apical | 45.4 ± 9.7 | 48.1 ± 10.8 | 50.4 ± 10.5 | 45.7 ± 9.6 | 49.3 ± 12.3 | 0.043 |
LV circumferential strain (%) | ||||||
 Basal | − 16.3 ± 2.4 | − 17.8 ± 1.7 | − 18.0 ± 1.7 | − 17.7 ± 2.2 | − 19.4 ± 2.3 | < 0.001 |
 Mid-cavity | − 17.6 ± 2.2 | − 18.5 ± 2.1 | − 18.6 ± 1.9 | − 18.4 ± 1.9 | − 20.4 ± 2.9 | < 0.001 |
 Apical | − 22.6 ± 2.9 | − 23.4 ± 2.7 | − 24.1 ± 2.7 | − 23.0 ± 2.5 | − 24.4 ± 2.9 | 0.009 |
RV radial strain (%) | ||||||
 Basal | 15.5 ± 5.9 | 17.0 ± 5.6 | 17.4 ± 5.6 | 18.4 ± 5.8 | 21.0 ± 6.3 | 0.002 |
 Mid-cavity | 22.1 ± 7.5 | 23.6 ± 7.7 | 24.1 ± 8.4 | 26.1 ± 7.6 | 29.6 ± 8.4 | 0.001 |
 Apical | 30.8 ± 9.4 | 33.2 ± 12.6 | 32.7 ± 12.7 | 36.0 ± 12.3 | 39.2 ± 10.9 | 0.030 |
RV circumferential strain (%) | ||||||
 Basal | − 9.6 ± 3.3 | − 10.1 ± 3.1 | − 10.4 ± 3.0 | − 11.1 ± 3.0 | − 13.6 ± 4.1 | < 0.001 |
 Mid-cavity | − 13.9 ± 3.6 | − 14.5 ± 3.6 | − 14.7 ± 3.8 | − 15.6 ± 3.2 | − 18.1 ± 4.0 | < 0.001 |
 Apical | − 16.9 ± 5.8 | − 17.8 ± 4.5 | − 17.5 ± 5.2 | − 18.7 ± 4.1 | − 21.2 ± 4.0 | 0.002 |