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

File: <base>/training/ningbo/g2/JS12548.hea (770 bytes) 
JS12548 12 500 5000
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JS12548.mat 16x1+24 1000.0(0)/mV 16 0 88 22714 0 V2
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# Age: 77
# Sex: Male
# Dx: 6374002,55827005,698252002,164890007,427172004
# Rx: Unknown
# Hx: Unknown
# Sx: Unknown