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

File: <base>/training/ningbo/g21/JS31220.hea (729 bytes) 
JS31220 12 500 5000
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JS31220.mat 16x1+24 1000.0(0)/mV 16 0 -54 6226 0 aVR
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JS31220.mat 16x1+24 1000.0(0)/mV 16 0 307 23237 0 V2
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JS31220.mat 16x1+24 1000.0(0)/mV 16 0 63 2420 0 V5
JS31220.mat 16x1+24 1000.0(0)/mV 16 0 49 9092 0 V6
# Age: 49
# Sex: Female
# Dx: 426177001
# Rx: Unknown
# Hx: Unknown
# Sx: Unknown