ibutilide (7.24). Class IV compounds include traditional Ca^2 +channel blockers such as
verapamil (7.25) and diltiazem (7.26).
7.4.4 Targeting the Sodium Channel Protein: AnticonvulsantsSeizures are the brain’s equivalent to cardiac arrhythmias. Like arrhythmias, seizures
are not a disease but rather a symptom of some underlying pathology. The human brain
ENDOGENOUS CELLULAR STRUCTURES 421