Table 2: Vagal response on deep breathing test (XDB). Central sympathetic response alpha (alpha SC), central sympathetic response beta (beta SC) obtained during mental stress, and peripheral sympathetic response alpha (alpha SP) obtained on hand grip test. Parameters were measured before and after treatment by amlodipine, and expressed as mean ± SE; **: 𝑃 < 0 . 0 1 .

Test XDB (%)Alpha SC (%)Beta SC (%)Alpha SP (%)

Before amlodipine treatment21.2 ± 6.523.9 ± 8.716.7 ± 9.220.5 ± 7.3
After amlodipine treatment30.8 ± 2.9**11.2 ± 2.0**10.4 ± 1.3**10.7 ± 2.4**