atr_i	manually determined boundaries and peaks on lead i
atr_ii	manually determined boundaries and peaks on on lead ii
atr_iii	manually determined boundaries and peaks on on lead iii
atr_avr	manually determined boundaries and peaks on on lead avr
atr_avl	manually determined boundaries and peaks on on lead avl
atr_avf	manually determined boundaries and peaks on on lead avf
atr_v1	manually determined boundaries and peaks on on lead v1
atr_v2	manually determined boundaries and peaks on on lead v2
atr_v3	manually determined boundaries and peaks on on lead v3
atr_v4	manually determined boundaries and peaks on on lead v4
atr_v5	manually determined boundaries and peaks on on lead v5
atr_v6	manually determined boundaries and peaks on on lead v6