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Table 3 Analyzed ECG leads and heartbeat intervals.

From: Electrochemotherapy of colorectal liver metastases - an observational study of its effects on the electrocardiogram

Patient number ECG lead used for analysis before/after ECT Analyzed
heartbeat intervals
No. of beats before ECT procedure No. of beats after ECT procedure
    N A (%) ST (%) N A (%) ST (%)
4 II / II NN, ppQTc 14317 12 (0.084) 0 (0) 14216 17 (0.119) 0 (0)
5 II / II NN, ppQTc 15722 3 (0.019) 15692 (99.8) 18112 1 (0.006) 14001 (77.3)
6 II / II NN 13975 309 (2.163) 0 (0) 18271 8 (0.044) 0 (0)
7 II / II NN, ppQTc 16873 20 (0.118) 0 (0) 18820 15 (0.080) 2321 (12.3)
9 II / V6 NN 18321 18 (0.098) 6915 (37.7) 26047 9 (0.035) 0 (0)
10 V6 / I NN 14785 70 (0.471) 0 (0) 15202 23 (0.151) 763 (5.02)
12 V6 / V6 NN, ppQTc 18825 42 (0.223) 0 (0) 17764 6 (0.034) 4395 (24.7)
13 II / II NN, ppQTc 13864 6 (0.043) 0 (0) 19405 8 (0.044) 3209 (16.5)
14 V6 / V6 NN, ppQTc 13857 135 (0.965) 10111 (73.0) 16620 0 (0) 7078 (42.6)
15 II / II NN, ppQTc 17461 25 (0.143) 696 (3.99) 26450 39 (0.147) 25188 (95.3)
Summary 158000 640 (0.403) 33414 (21.1) 190907 126 (0.034) 56955 (29.8)
  1. NN: normal-to-normal heartbeat interval; ppQTc: corrected peak-to-peak QT interval; N: number of heartbeats classified as normal; A: number of heartbeats classified as abnormal; ST: number of heartbeats with ST segment deviation.
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