Table 1.

Effects of verapamil on characteristics of reentry during 20-s VF episodes

	Baseline	Verapamil	Percent Change	P Value
Reentry incidence, %	3.3 ± 2.1	1.0 ± 0.9	70 ± 11↓	0.01
Reentrant core size, mm2	83 ± 49	77 ± 50	7 ± 8↓	0.22
Reentrant perimeter, mm	47 ± 15	43 ± 17	9 ± 17↓	0.25
Reentrant cycle length, ms	82 ± 10	70 ± 9.6	15 ± 4↓	<0.001
Reentrant speed, m/s	0.51 ± 0.06	0.56 ± 0.04	10 ± 2↑	<0.001

Values are means ± SD. VF, ventricular fibrillation.