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Figure 2 Scatter-graph showing the mean frequency of single-unit muscle sympathetic nerve activity (s-MSNA) in essential hypertensives with left ventricular hypertrophy (LVH) (triangles) and without LVH (squares). Open triangles = those subjects receiving therapy; bars = the group mean. *p < 0.001 (two-way analysis of variance). NS = nonsignificant.