Will Two Do? Varying Dimensions in Electrocardiography: The PhysioNet/Computing in Cardiology Challenge 2021 1.0.3

File: <base>/training/ningbo/g2/JS11870.hea (765 bytes) 
JS11870 12 500 5000
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JS11870.mat 16x1+24 1000.0(0)/mV 16 0 -205 19849 0 aVF
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JS11870.mat 16x1+24 1000.0(0)/mV 16 0 -166 20692 0 V6
# Age: 17
# Sex: Male
# Dx: 426177001,270492004,427393009
# Rx: Unknown
# Hx: Unknown
# Sx: Unknown