Heart rate thresholds for cardiovascular risk and sympathetic activation in the metabolic syndrome.

In the group as a whole both MSNA and plasma NE showed highly significant direct relationships with clinic HR, the correlation being similar for MSNA and NE ( r = 0.89 and r = 0.91, P < 0.01 for both) Similar significant relationships were also found between 24-h HR values and MSNA or NE.

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