Table 2.
Baseline renal duplex echo-Doppler parameters of the study population
| Parameter | Essential hypertension (n = 100) | Primary aldosteronism (n = 54) | P value |
|---|---|---|---|
| Total kidney volume (ml) | 414 ± 61 | 411 ± 58 | NS |
| Resistance index | 0.64 ± 0.05 | 0.61 ± 0.07 | 0.003 |
| Pulsatility index | 1.26 ± 0.14 | 1.19 ± 0.15 | 0.005 |
| Acceleration (m/sec2) | 19.2 ± 1.8 | 18.9 ± 1.5 | NS |
Values represent means ± sd. P values are calculated by the Student’s t test for unpaired data. Indicative normal reference values for intrarenal Doppler measurements: resistance index, 0.62 ± 0.07; pulsatility index, 1.20 ± 0.20; acceleration, 18.0 ± 3.0 m/sec2. NS, Not significant.