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

File: <base>/training/ningbo/g34/JS44257.hea (758 bytes) 
JS44257 12 500 5000
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JS44257.mat 16x1+24 1000.0(0)/mV 16 0 24 5021 0 V2
JS44257.mat 16x1+24 1000.0(0)/mV 16 0 -151 32462 0 V3
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JS44257.mat 16x1+24 1000.0(0)/mV 16 0 -73 -26477 0 V6
# Age: 70
# Sex: Male
# Dx: 427084000,164873001,55930002
# Rx: Unknown
# Hx: Unknown
# Sx: Unknown