Figure 2 | Hypertension Research

Figure 2

From: Hypertension and coarctation of the aorta: an inevitable consequence of developmental pathophysiology

Figure 2

Graphical representation of heart rate variability indicating number of successive normal-to-normal RR intervals greater than 5, 10, 20, 30, 40 and 50 ms expressed as a ratio of the total number of normal-to-normal RR intervals in the recording period (pNN5, 10, and so on). The variability is more pronounced in the control twin at all intervals indicating greater high-frequency variations in HR, representative of more pronounced parasympathetic modulation of heart rate variability.

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