The central nervous effect of prostaglandins I2, E2 and F2 alpha on aconitine-induced cardiac arrhythmia in rats.

Intracerebroventricular administration of PGI2 or PGE2 reduced aconitine-induced cardiac arrhythmia in rats. PGF2 alpha had no antiarrhythmic effect under the same conditions. The ED50 values of PGI2 and E2 were 0.25 microgram/kg and 1.1 microgram/kg, respectively. Central mechanisms may participate in the antiarrhythmic effect of these PGs.