What is sick sinus syndrome?

Heart rate problem: Sick sinus syndrome is a vague medical term referring to a problem with the heart's sinus rhythm. It can include rhythms that are too fast, too slow, irregular, or all of the above. If symptomatic, it is often treated with a pacemaker. It can be a symptom of aging, or of a deeper problem. Definitely, get it checked out asap.

Arrhythmia: Sick sinus is a syndrome characterized by both rapid and slow rhythms in the same person. Often needs to be treated with pacemaker so the slowing for the rapid can be protected from getting too slow.

Sick sinus syndrome: Sick sinus syndrome is a cardiac conduction disorder where the hearts spontaneous pacemaker, does not send its electrical impulses quick enough to keep the heart beating as fast as your body requires. It results in the heart rate becoming too slow, not getting fast enough during exertion, or waiting too long to spontaneously restart after a fast heart rate. Can be treated with pacemaker. See doc