TABLE 3.
Polarity of ECG components on Einthoven leads in zebrafish vs. humans.
| Polarity | P wave n/ntotal (%) | QRS complex n/ntotal (%) | T wave n/ntotal (%) | QRS-T concordance n/ntotal (%) |
| Zebrafish lead I | ||||
| Total (n = 30) | (+): 25/30 (83%) (−): 2/30 (7%) (0): 3/30 (10%) | (+): 28/30 (93%) (−): 2/30 (7%) (0): 0/30 (0%) | (+): 28/30 (93%) (−): 2/30 (7%) (0): 0/30 (0%) | (+): 25/30 (83%) (−): 2/30 (7%) (0): 3/30 (10%) |
| M (n = 15) | (+): 12/15 (80%) (−): 1/15 (7%) (0): 2/15 (13%) | (+): 14/15 (93%) (−): 1/15 (7%) (0): 0/15 (0%) | (+): 14/15 (93%) (−): 1/15 (7%) (0): 0/15 (0%) | (+): 12/15 (80%) (−): 1/15 (7%) (0): 2/15 (13%) |
| F (n = 15) | (+): 13/15 (87%) (−): 1/15 (7%) (0): 1/15 (7%) | (+): 14/15 (93%) (−): 1/15 (7%) (0): 0/15 (0%) | (+): 14/15 (93%) (−): 1/15 (7%) (0): 0/15 (0%) | (+):14/15 (93%) (−):1/15 (7%) (0): 0/15 (0%) |
| Zebrafish M vs. F lead I | P > 0.99 | P > 0.99 | P > 0.99 | P = 0.59 |
| Zebrafish lead II | ||||
| Total (n = 30) | (+): 0/30 (0%) (−): 29/30 (97%) (0): 1/30 (3%) | (+): 0/30 (0%) (−): 30/30 (100%) (0): 0/30 (0%) | (+): 0/30 (0%) (−): 29/30 (97%) (0): 1/30 (3%) | (+): 0/30 (0%) (−): 28/30 (93%) (0): 2/30 (7%) |
| M (n = 15) | (+): 0/15 (0%) (−): 14/15 (93%) (0): 1/15 (7%) | (+): 0/15 (0%) (−): 15/15 (100%) (0): 0/15 (0%) | (+): 0/15 (0%) (−): 14/15 (93%) (0): 1/15 (7%) | (+): 0/15 (0%) (−): 13/15 (87%) (0): 2/15 (13%) |
| F (n = 15) | (+): 0/15 (0%) (−): 15/15 (100%) (0): 0/15 (0%) | (+): 0/15 (0%) (−): 15/15 (100%) (0): 0/15 (0%) | (+): 0/15 (0%) (−): 15/15 (100%) (0): 0/15 (0%) | (+): 0/15 (0%) (−): 15/15 (100%) (0): 0/15 (0%) |
| Zebrafish M vs. F lead II | P > 0.99 | P > 0.99 | P > 0.99 | P = 0.481 |
| Zebrafish lead I vs. II | P < 0.0001 | P < 0.0001 | P < 0.0001 | P < 0.0001 |
| Human lead I | ||||
| Total (n = 24) | (+): 24/24 (100%) (−): 0/24 (0%) (0): 0/24 (0%) | (+): 23/24 (96%) (−): 0/24 (0%) (0): 1/24 (4%) | (+): 24/24 (100%) (−): 0/24 (0%) (0): 0/24 (0%) | (+): 23/24 (96%) (−): 0/24 (0%) Undetermined: 1/24 (4%) (0): 0/24 (0%) |
| M (n = 12) | (+): 12/12 (100%) (−): 0/12 (0%) (0): 0/12 (0%) | (+):12/12 (100%) (−): 0/12 (0%) (0): 0/12 (0%) | (+):12/12 (100%) (−): 0/12 (0%) (0): 0/12 (0%) | (+): 12/12 (100%) (−): 0/12 (0%) (0): 0/12 (0%) |
| F (n = 12) | (+): 12/12 (100%) (−): 0/12 (0%) (0): 0/12 (0%) | (+): 11/12 (92%) (−): 0/12 (0%) (0): 1/12 (8%) | (+): 12/12 (100%) (−): 0/12 (0%) (0): 0/12 (0%) | (+): 11/12 (92%) (−): 0/12 (0%) Undetermined: 1/12 (8%) (0): 0/12 (0%) |
| Human M vs. F lead I | P > 0.99 | P > 0.99 | P > 0.99 | P > 0.99 |
| Human lead II | ||||
| Total (n = 24) | (+): 23/24 (96%) (−): 0/24 (0%) (0): 1/24 | (+): 24/24 (100%) (−): 0/24 (0%) (0): 0/24 (0%) | (+): 24/24 (100%) (−): 0/24 (0%) (0): 0/24 (0%) | (+): 24/24 (100%) (−): 0/24 (0%) (0): 0/24 (0%) |
| M (n = 12) | (+):11/12 (92%) (−): 0/12 (0%) (0): 1/12 (8%) | (+):12/12 (100%) (−): 0/12 (0%) (0): 0/12 (0%) | (+):12/12 (100%) (−): 0/12 (0%) (0): 0/12 (0%) | (+): 12/12 (100%) (−): 0/12 (0%) (0): 0/12 (0%) |
| F (n = 12) | (+): 12/12 (100%) (−): 0/12 (0%) (0): 0/12 (0%) | (+): 12/12 (100%) (−): 0/12 (0%) (0): 0/12 (0%) | (+): 12/12 (100%) (−): 0/12 (0%) (0): 0/12 (0%) | (+): 12/12 (100%) (−): 0/12 (0%) (0): 0/12 (0%) |
| Human M vs. F lead II | P > 0.99 | P > 0.99 | P > 0.99 | P > 0.99 |
| Human lead I vs. II | P > 0.99 | P > 0.99 | P > 0.99 | P > 0.99 |
| Fish vs. human lead I | P = 0.06 | P > 0.99 | P = 0.5 | P = 0.2 |
| Fish vs. human lead II | P < 0.0001 | P < 0.0001 | P < 0.0001 | P < 0.0001 |
We compared differences between leads, species, and sexes using Fisher’s exact test. P-values are shown in italics; statistically significant P-values in bold font. Polarity (0), isoelectric; QRS-T concordance (0), discordance.