IVRT (ms)
E/A ratio
DT (ms)
A duration (ms)
PV S/D ratio
PV Ar (cm/s)
PV Ar duration (ms)
Septal e’/a’ (cm/s)
Septal e’/a’ ratio
Lateral e’ (cm/s)
Lateral e’/a’ ratio
Measurement:
IVRT (ms) |
| Age Group: 16-20 y |
| 50 ± 9(32–68) |
| Age Group: 21-40 y |
| 67 ± 8(51–83) |
| Age Group: 41-60 y |
| 74 ± 7(60–88) |
| Age Group: >60 y |
| 87 ± 7(73–101) |
Measurement:
E/A ratio |
| Age Group: 16-20 y |
| 1.88 ± 0.45(0.98–2.78) |
| Age Group: 21-40 y |
| 1.53 ± 0.40(0.73–2.33) |
| Age Group: 41-60 y |
| 1.28 ± 0.25(0.78–1.78) |
| Age Group: >60 y |
| 0.96 ± 0.18(0.6–1.32) |
Measurement:
DT (ms) |
| Age Group: 16-20 y |
| 142 ± 19(104–180) |
| Age Group: 21-40 y |
| 166 ± 14(138–194) |
| Age Group: 41-60 y |
| 181 ± 19(143–219) |
| Age Group: >60 y |
| 200 ± 29(142–258) |
Measurement:
A duration (ms) |
| Age Group: 16-20 y |
| 113 ± 17(79–147) |
| Age Group: 21-40 y |
| 127 ± 13(101–153) |
| Age Group: 41-60 y |
| 133 ± 13(107–159) |
| Age Group: >60 y |
| 138 ± 19(100–176) |
Measurement:
PV S/D ratio |
| Age Group: 16-20 y |
| 0.82 ± 0.18(0.46–1.18) |
| Age Group: 21-40 y |
| 0.98 ± 0.32(0.34–1.62) |
| Age Group: 41-60 y |
| 1.21 ± 0.32(0.81–1.61) |
| Age Group: >60 y |
| 1.39 ± 0.47(0.45–2.33) |
Measurement:
PV Ar (cm/s) |
| Age Group: 16-20 y |
| 16 ± 10(1–36) |
| Age Group: 21-40 y |
| 21 ± 8(5–37) |
| Age Group: 41-60 y |
| 23 ± 3(17–29) |
| Age Group: >60 y |
| 25 ± 9(11–39) |
Measurement:
PV Ar duration (ms) |
| Age Group: 16-20 y |
| 66 ± 39(1–144) |
| Age Group: 21-40 y |
| 96 ± 33(30–162) |
| Age Group: 41-60 y |
| 112 ± 15(82–142) |
| Age Group: >60 y |
| 113 ± 30(53–173) |
Measurement:
Septal e’/a’ (cm/s) |
| Age Group: 16-20 y |
| 14.9 ± 2.4(10.1–19.7) |
| Age Group: 21-40 y |
| 15.5 ± 2.7(10.1–20.9) |
| Age Group: 41-60 y |
| 12.2 ± 2.3(7.6–16.8) |
| Age Group: >60 y |
| 10.4 ± 2.1(6.2–14.6) |
Measurement:
Septal e’/a’ ratio |
| Age Group: 16-20 y |
| 2.4* |
| Age Group: 21-40 y |
| 1.6 ± 0.5(0.6–2.6) |
| Age Group: 41-60 y |
| 1.1 ± 0.3(0.5–1.7) |
| Age Group: >60 y |
| 0.85 ± 0.2(0.45–1.25) |
Measurement:
Lateral e’ (cm/s) |
| Age Group: 16-20 y |
| 20.6 ± 3.8(13–28.2) |
| Age Group: 21-40 y |
| 19.8 ± 2.9(14–25.6) |
| Age Group: 41-60 y |
| 16.1 ± 2.3(11.5–20.7) |
| Age Group: >60 y |
| 12.9 ± 3.5(5.9–19.9) |
Measurement:
Lateral e’/a’ ratio |
| Age Group: 16-20 y |
| 3.1* |
| Age Group: 21-40 y |
| 1.9 ± 0.6(0.7–3.1) |
| Age Group: 41-60 y |
| 1.5 ± 0.5(0.5–2.5) |
| Age Group: >60 y |
| 0.9 ± 0.4(0.1–1.7) |
Data are expressed as mean ± SD (95% confidence interval). Note that for e’ velocity in subjects aged 16 to 20 years, values overlap with those for subjects aged 21 to 40 years. This is because e’ increases progressively with age in chilfren and adolescents. Therefore, the e’ velocity is higher in a normal 20-year-old than in a normal 16-year-old, which results in a somewhat lower average e’ value when subjects aged 16 to 20 years are considered.
*Standard deviations are not included because these data were computed, not directly provided in the original articles from which they were derived.