Abstract: To evaluate the relationship between lesion’s severity and Poincarè plots (PPlots) features, 20 first-ever stroke subjects and 10 healthy subjects were studied. Patients were divided in two groups according to single or multiple medium cerebral artery lesion, All subjects underwent 24-hour Holter recording analysed by PPlots, spectral and timedomain techniques. PPlots were quantified by the length (L), width (W) and area (A) of 2D plots and by the number of peaks (Np) and the length of the radii of inertia (Px,y,z) of the 3D plots. The power in VLF, LF and HF bands and the classical time-domain indices SDNN, PNN50, MSSD were also evaluated. A direct relationship between increasing lesion’s severity and progressive collapsing of both 2D and 3D PPlots was observed. L, A and Np, showed the most significant differences between groups, while lower significance was found for spectral and timedomain parameters. These results suggest that PPlots analysis contains relevant information related to different HRV dynamics in normal and stroke subjects with different lesion’s severity
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