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

File: <base>/training/ningbo/g10/JS20473.hea (745 bytes) 
JS20473 12 500 5000
JS20473.mat 16x1+24 1000.0(0)/mV 16 0 49 16602 0 I
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JS20473.mat 16x1+24 1000.0(0)/mV 16 0 63 -19381 0 aVF
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JS20473.mat 16x1+24 1000.0(0)/mV 16 0 639 325 0 V3
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JS20473.mat 16x1+24 1000.0(0)/mV 16 0 166 -4089 0 V6
# Age: 80
# Sex: Male
# Dx: 284470004,426177001
# Rx: Unknown
# Hx: Unknown
# Sx: Unknown