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

File: <base>/training/ptb-xl/g16/HR15110.hea (750 bytes) 
HR15110 12 500 5000
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HR15110.mat 16x1+24 1000.0(0)/mv 16 0 -20 -18049 0 III
HR15110.mat 16x1+24 1000.0(0)/mv 16 0 80 12342 0 aVR
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HR15110.mat 16x1+24 1000.0(0)/mv 16 0 45 -3042 0 V6
# Age: 56
# Sex: Male
# Dx: 426783006,713426002
# Rx: Unknown
# Hx: Unknown
# Sx: Unknown