b42 4 1000 60000 b42.dat 16 2/uV 12 0 171 -10633 0 AECG1 b42.dat 16 2/uV 12 0 44 -9257 0 AECG2 b42.dat 16 2/uV 12 0 82 -13093 0 AECG3 b42.dat 16 2/uV 12 0 12 -19780 0 AECG4