In the past, an irregular heart rhythm was treated by using a drug to help regulate the beat. There is a treatment that can also regulate heart rhythms that has replaced drugs in some cases. What is that treatment?

A pacemaker sends small electrical impulses to help the heart maintain a regular rhythm. It can be used instead of medication in some cases of an irregular heartbeat. Angioplasty opens narrowed blood vessels, while a myocardial infarction is a heart attack.

AI-written and checked against the verified answer.