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

File: <base>/training/ningbo/g2/JS12269.hea (751 bytes) 
JS12269 12 500 5000
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JS12269.mat 16x1+24 1000.0(0)/mV 16 0 29 -17443 0 aVF
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JS12269.mat 16x1+24 1000.0(0)/mV 16 0 -137 21025 0 V2
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JS12269.mat 16x1+24 1000.0(0)/mV 16 0 29 -1970 0 V6
# Age: 72
# Sex: Female
# Dx: 426177001,270492004,164934002
# Rx: Unknown
# Hx: Unknown
# Sx: Unknown