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The relationships of MSNA with the AVI or API in each group. Relationships between MSNA and the AVI (a) and between MSNA and the API (b) in healthy subjects. Relationships between MSNA and the AVI (c) and between MSNA and the API (d) in patients with HT. Abbreviations: AVI, arterial velocity pulse index; AU, arbitrary unit; API, arterial pressure‐volume index; BI, burst incidence; MSNA, muscle sympathetic nerve activity; HT, hypertension; R, correlation coefficient
