Figure 3.

Correct VB detection with some exceptions. A QRS complex is early detected as EB because of muscle disturbances between the 768^th and 769^th s of AHA 6003d2. Normal QRS complexes after 22^nd and 28^th s in AHA 2008d1 are marked erroneously as EBs. Difficult EBs with compensatory pause are detected in AHA 5001d1, except for the low amplitude EB after the 258^th s.