Click on image to view larger version.

Figure 1 The mean frequency of single-unit muscle sympathetic nerve activity (s-MSNA) in the three groups of subjects, NT (normotension), WHT (white-coat hypertension) and EHT (essential hypertension) expressed as mean (height of columns) and SEM (bars). Symbols represent statistical analysis between groups; *p < 0.05 and p < 0.05.