Research Article

A Classification System to Detect Congestive Heart Failure Using Second-Order Difference Plot of RR Intervals

Figure 2

(a) C T M ( 𝑟 ) versus 𝑟 (b) 𝐷 ( 𝑟 ) versus 𝑟 for an N (blue) and CHF (red) subject.
807379.fig.002a
(a)
807379.fig.002b
(b)