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

File: <base>/training/ningbo/g25/JS35557.hea (703 bytes) 
JS35557 12 500 5000
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JS35557.mat 16x1+24 1000.0(0)/mV 16 0 -39 -24840 0 III
JS35557.mat 16x1+24 1000.0(0)/mV 16 0 98 27882 0 aVR
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JS35557.mat 16x1+24 1000.0(0)/mV 16 0 -78 13718 0 aVF
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# Age: 7
# Sex: Male
# Dx: 427393009
# Rx: Unknown
# Hx: Unknown
# Sx: Unknown