ari	automatically-generated beat annotations
atr	manually corrected beat annotations
16a	automatically-generated, manually-corrected ST-segment measurements
sta	ST-segment episode annotations, Vmin = 75 microV, Tmin = 30 s
stb	ST-segment episode annotations, Vmin = 100 microV, Tmin = 30 s
stc	ST-segment episode annotations, Vmin = 100 microV, Tmin = 60 s