Final answer:
The primary treatment for sick sinus syndrome is the implantation of an artificial pacemaker, which regulates the heart's rhythm by providing electrical stimulation. These devices can be programmed for on-demand or continuous stimulation and may include built-in defibrillators.
Step-by-step explanation:
Patients with sick sinus syndrome are often treated by implanting an artificial pacemaker. When the heart falls into a junctional rhythm, which is less efficient than the normal sinus rhythm, the implantation of a pacemaker can help. The pacemaker delivers electrical impulses to the heart muscle, ensuring that it contracts and pumps blood effectively. These pacemakers can be programmed by cardiologists to deliver electrical stimulation either on demand or continuously, depending on the patient's needs. Additionally, some advanced devices come with built-in defibrillators to address more severe arrhythmias.