Mechanisms of arrhythmias: enhanced automaticity and reentry

Table 2 provides an overview of the classifications of antiarrhythmic agents, their actions, and their uses against reentrant arrhythmias and those caused by enhanced automaticity. Table 3 reviews many of the differences between the two mechanisms of arrhythmias: enhanced automaticity and reentry. Clinical distinction will assist in the most appropriate choice of therapy for terminating cardiac arrhythmias.