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

File: <base>/training/ningbo/g13/JS23474.hea (757 bytes) 
JS23474 12 500 5000
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JS23474.mat 16x1+24 1000.0(0)/mV 16 0 -215 20848 0 V2
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# Age: 85
# Sex: Female
# Dx: 59118001,427084000,427172004
# Rx: Unknown
# Hx: Unknown
# Sx: Unknown