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

File: <base>/training/ningbo/g12/JS22231.hea (754 bytes) 
JS22231 12 500 5000
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JS22231.mat 16x1+24 1000.0(0)/mV 16 0 -54 -25282 0 V2
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JS22231.mat 16x1+24 1000.0(0)/mV 16 0 -49 -29510 0 V6
# Age: 74
# Sex: Male
# Dx: 426177001,6374002,39732003
# Rx: Unknown
# Hx: Unknown
# Sx: Unknown