TABLE 4.
Incidence of arrhythmia in perfused hearts of the control, untreated MI, and pre-treated MI groups.
| Control | Untreated MI | Lipoic acid | Zinc | Clopidogrel | |
| Total number of rats | 25 | 16 | 24 | 24 | 25 |
| Number of rats with basal arrhythmia | 0 | 4a | 1 | 3 | 1b |
| Percent ratio | 0% | 25% | 4.17% | 12.5% | 4% |
| Number of rats with ISO-provoked arrhythmia | 1 | 2 | 1 | 1 | 0 |
| Percent ratio | 4% | 12.5% | 4.17% | 4.17% | 0% |
| Total number of rats with arrhythmia | 1 | 6a | 2b | 4 | 1b |
| Percent ratio | 4% | 37.5% | 8.33% | 16.67% | 4% |
MI, myocardial infarction; ISO, isoproterenol. aSignificance of differences from control group calculated by χ2-test at p < 0.05. bSignificance of differences from MI group calculated by χ2-test at p < 0.05.