Word: Antiarrhythmic
Part of Speech: Noun
Definition: An antiarrhythmic is a type of medicine (drug) that helps to treat problems with the heart's rhythm. When the heart beats too fast, too slow, or in an irregular way, antiarrhythmics can help make the heartbeat more normal.
"The doctor prescribed an antiarrhythmic to help control my irregular heartbeat."
In more advanced discussions, you might encounter terms like "cardiac arrhythmia," which refers to the condition of having an irregular heartbeat. You could say, "The patient with cardiac arrhythmia was treated with an antiarrhythmic medication."
In summary, "antiarrhythmic" refers to a drug that is used to help fix problems with how the heart beats.