Does the relationship between heart rate and blood pressure differ between hypertensive and normotensive subjects?
Hypertensive subjects demonstrate a different relationship between heart rate and blood pressure compared to normotensive subjects, indicating altered neurovegetative modulation.
A twenty-four-hour blood pressure (BP) monitoring was performed in 20 normotensive and 20 hypertensive subjects, matched by sex and age. Blood pressure and heart rate (HR) variability were evaluated both as absolute and percent standard deviation. In agreement with the literature no significant difference in HR and BP variability was observed between the two groups. The linear regression between HR and BP values was evaluated in both groups. The authors observed a significant difference in the relationship between these two cardiovascular variables between the two groups. In the hypertensive group the cardiovascular control of HR and BP showed a different relationship than in normotensive subjects, suggesting a different neurovegetative modulation.
Vannucchi et al. (Mon,) studied this question.
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