Which type of medication is used primarily to combat arrhythmias?

Antidysrhythmics are specifically designed to treat arrhythmias, which are irregular heartbeats. These medications work by affecting the electrical impulses in the heart that cause it to beat. They can help restore the normal rhythm of the heart by either slowing down or stabilizing electrical conduction, depending on the specific type of antidysrhythmic used.

In the context of arrhythmias, these medications are crucial because they can prevent serious complications like stroke or heart failure that may arise from an irregular heartbeat. Thus, antidysrhythmics are tailored for this purpose, making them the appropriate choice for managing arrhythmias effectively.