It is concluded that the endogenous heat toxin is the cardinal factor leading to apoplexy.Its formation and development experience three stages like latent,delomorphic and acute changeable ones.

• 其形成与演变大体经历了隐匿态、显现态、极变态三期,其致病具有骤发性、酷烈性、火热性、兼挟性、善变性、顽固性等特点。