Table 4.

Incidences of phase 2 VF in conscious rats

Incidence of phase 2 VF	Year
90	1981
70	1981
50	1981
70	1983
55	1983
75	1984
60	1984
75	1985
75	1985
100	1986
89	1988
66	1992
81	1995

Mean±s.d.: 74±14%. Data are taken from Curtis et al. (1987); Opitz et al. (1995); Saint et al. (1992). For each year, the data represent the group mean incidence from groups of sizes ranging from 4 to 9 (variation due to variation in numbers of deaths occurring from phase 1 VF and cardiac output failure prior to the start of the phase 2 observation period).