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

File: <base>/training/ningbo/g30/JS39880.hea (737 bytes) 
JS39880 12 500 5000
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JS39880.mat 16x1+24 1000.0(0)/mV 16 0 -24 -15926 0 V2
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JS39880.mat 16x1+24 1000.0(0)/mV 16 0 -49 -5450 0 V6
# Age: 53
# Sex: Female
# Dx: 426783006
# Rx: Unknown
# Hx: Unknown
# Sx: Unknown