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The relationships of MSNA with the AVI or API in all subjects. Relationships between MSNA and the AVI (a) and between MSNA and the API (b) in all subjects. Note: White circles indicate healthy subjects, and black circles indicate 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; R, correlation coefficient
