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Effects of verapamil on activation patterns during 20-s VF episodes
| Baseline | Verapamil | Percent Change | P Value | |
|---|---|---|---|---|
| Number of wavefronts | 72 ± 24 | 75 ± 31 | 4 ± 0.05↑ | 0.07 |
| Fractionation incidence | 0.14 ± 0.05 | 0.12 ± 0.05 | 14 ± 7↓ | 0.009 |
| Multiplicity | 11.3 ± 5.4 | 15.2 ± 6.4 | 35 ± 14↑ | <0.001 |
| Activation rate, b/s | 10 ± 0.9 | 10.4 ± 1.3 | 4 ± 2.6↑ | 0.043 |
| Conduction velocity, m/s | 0.44 ± 0.09 | 0.49 ± 0.09 | 11 ± 1.2↑ | <0.001 |
Values are means ± SD.
