Figure 1

Traces showing rapid cardiovascular collapse induced by E. ocellatus venom (50 µg/kg, i.v.) in anaesthetised rats in the (a) absence and (b) presence of artificial respiration. (c) Trace showing the response to E. ocellatus venom (50 µg/kg, i.v.) after two sequential priming doses of E. ocellatus venom (1 µg/kg, i.v). Venom additions indicated by arrows.