Combined Nonlinear Analysis of Atrial and Ventricular Series for Automated Screening of Atrial Fibrillation

Table 1

Classification outcomes obtained by the combined quadratic sample entropy in TQ intervals (TQEn) and the coefficient of sample entropy (COSEn) when applied to the AFDB for different values of and .

Parameter	Se	Sp	Acc	Th	Delay
TQEn (L = 5 & N = 15)	94.03%	92.39%	93.12%	−1.40	8.89 beats
TQEn (L = 5 & N = 30)	94.19%	95.01%	94.64%	−1.31	16.47 beats
TQEn (L = 15 & N = 15)	93.02%	95.64%	94.47%	−1.68	13.91 beats
TQEn (L = 15 & N = 30)	93.89%	96.18%	95.15%	−1.66	21.75 beats
COSEn (N = 5)	85.43%	83.68%	84.46%	−1.67	2.75 beats
COSEn (N = 12)	94.57%	93.11%	93.76%	−1.47	7.24 beats
COSEn (N = 15)	95.32%	94.14%	94.64%	−1.44	8.12 beats
COSEn (N = 30)	95.94%	96.32%	96.15%	−1.37	16.87 betas