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

File: <base>/training/ningbo/g21/JS30967.hea (730 bytes) 
JS30967 12 500 5000
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JS30967.mat 16x1+24 1000.0(0)/mV 16 0 -15 -5565 0 aVF
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JS30967.mat 16x1+24 1000.0(0)/mV 16 0 24 14908 0 V2
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JS30967.mat 16x1+24 1000.0(0)/mV 16 0 15 -946 0 V6
# Age: 54
# Sex: Female
# Dx: 426177001
# Rx: Unknown
# Hx: Unknown
# Sx: Unknown