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

File: <base>/training/ningbo/g13/JS23393.hea (766 bytes) 
JS23393 12 500 5000
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JS23393.mat 16x1+24 1000.0(0)/mV 16 0 -337 -2040 0 aVR
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JS23393.mat 16x1+24 1000.0(0)/mV 16 0 -2069 -2006 0 V2
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JS23393.mat 16x1+24 1000.0(0)/mV 16 0 473 -513 0 V6
# Age: 67
# Sex: Female
# Dx: 446358003,164912004,10370003
# Rx: Unknown
# Hx: Unknown
# Sx: Unknown