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Figure 2 Regression analysis between changes in muscle sympathetic nerve activity (MSNA) (burst/min, left panel), heart rate (HR) (beats/min [bpm], right panel), and mean arterial blood pressure (MBP) (mm Hg) during dobutamine infusion in the control subjects; the largest increases in MBP are accompanied by the most pronounced inhibitions in MSNA as well as with the least increases in HR.