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

File: <base>/training/ningbo/g1/JS11641.hea (765 bytes) 
JS11641 12 500 5000
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JS11641.mat 16x1+24 1000.0(0)/mV 16 0 49 7873 0 aVF
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JS11641.mat 16x1+24 1000.0(0)/mV 16 0 127 -12499 0 V2
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JS11641.mat 16x1+24 1000.0(0)/mV 16 0 59 6565 0 V6
# Age: 68
# Sex: Female
# Dx: 426783006,270492004,39732003,61721007
# Rx: Unknown
# Hx: Unknown
# Sx: Unknown