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

File: <base>/training/ningbo/g35/JS44909.hea (765 bytes) 
JS44909 12 500 5000
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JS44909.mat 16x1+24 1000.0(0)/mV 16 0 -10 14439 0 V4
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# Age: 30
# Sex: Female
# Dx: 427084000,164873001,429622005,59931005
# Rx: Unknown
# Hx: Unknown
# Sx: Unknown