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

File: <base>/training/ningbo/g3/JS12741.hea (763 bytes) 
JS12741 12 500 5000
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JS12741.mat 16x1+24 1000.0(0)/mV 16 0 54 -7379 0 aVR
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JS12741.mat 16x1+24 1000.0(0)/mV 16 0 10 28129 0 aVF
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JS12741.mat 16x1+24 1000.0(0)/mV 16 0 -98 3166 0 V2
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JS12741.mat 16x1+24 1000.0(0)/mV 16 0 -117 21481 0 V4
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JS12741.mat 16x1+24 1000.0(0)/mV 16 0 -166 26136 0 V6
# Age: 76
# Sex: Female
# Dx: 698252002,164890007,55827005
# Rx: Unknown
# Hx: Unknown
# Sx: Unknown