Assessment of cardiovascular status through the pattern variability of blood pressure signal

Any periodic or nearly periodic signal can be characterized by three periodicity attributes: the period length, the shape or pattern of the repetitive segments, and the scaling factors associated with the successive periodic segments. The pattern variability series derived from the blood pressure signal for normal and diseased subjects are examined. For the healthy subjects the pattern variability is found to be distinctly nondeterministic, whereas they are found to be deterministic for subjects with cardiovascular problems