Table 2. Simple descriptions, total accuracy, right-side total accuracy and left-side total accuracy in pediatric patients with the previous algorithms and the newly developed algorithm.

	Simple descriptions	Total	Right side	Left side
Arruda	4 individual steps	46.2%	34.3%	70.6%
	1. I (Δ < +) or V1 (RS > 1) → AVF (Δ)
	2. II (Δ: -)
	3. V1 (Δ < +) → AVF (Δ)
	4. Remaining → AVF (Δ)
Boersma	3 sequential steps	70.2%	77.1%	55.9%
	V1 (RS), III (RS), II (RS)
Chiang	4 sequential steps	48.1%	32.9%	79.4%
	V2 (RS), III (Δ), AVF (Δ) / V1 (RS)
d’Avila	4 sequential steps	30.8%	11.4%	70.6%
	V1 (RS), III (RS), AVL (RS) / III (Q) → RSII(RS)
Iturralde	3 sequential steps	46.2%	41.4%	55.9%
	III (RS), V1 (RS), V2 (RS)
Li	3 sequential steps	92.3%	88.6%	100%
	V1 (RS), V1 (Δ) / I (Δ) → III (Δ)

RS, R/S polarity; Δ, delta wave polarity; < +, ± or -; /, followed by the different result of previous step in the same level of algorithm; →, next step only following by the one of the previous step.