Click on image to view larger version.

Figure 1 Example of recordings from a patient with hypertension. From above and moving down are shown the electrocardiogram (ECG), respiratory movements (Resp), Finapress blood pressure (FBP), multiunit muscle sympathetic nerve activity (Bursts) and action potentials (AP in µV). The single-unit muscle sympathetic nerve activity is counted from APs of the same profile and amplitude (tallest unit in this example) to derive the mean frequency of central vasoconstrictor sympathetic neural discharge. The burst count may include a variable number of units with different profiles.