What are the risks of riding roller coasters for a person with pacemaker?

That depends: The pacemaker itself is not a problem. However, riding a roller coaster can be stressful to some. (such as me!). If you also have coronary artery disease, the stress could provoke chest pain so that the roller coaster ride can be just as dangerous as any other stressful activity.

Pacer: It depends on the patients overall condition. A pacemaker itself is just a device. If the patients condition such as heart failure makes the roller coaster a bad risk, that is what the limit is. Ask the treating doctor, but would not hop on the ride without that.