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

File: <base>/training/cpsc_2018/g7/A6646.hea (674 bytes) 
A6646 12 500 5000
A6646.mat 16x1+24 1000.0(0)/mV 16 0 -42 1 0 I
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# Age: 76
# Sex: Female
# Dx: 164884008
# Rx: Unknown
# Hx: Unknown
# Sx: Unknown