I have sinus bradycardia. dr is recommending pacemaker are there any other alternatives that can be consider?

Bradycardia: More information is needed to advise you. If your heart rate won't increase adequately with exercise, you may need need a pacer to allow you to increase activity.

Only if symptomatic: This depends on the health of the heart, exclusion of any other problems, and presence of symptoms. Healthy, conditioned athletes may have sinus bradycardia while sleeping, sometimes as low as a hr in the 30s! but one key distinction is that the hr increases with exercise. If you have no symptoms, have a normal hr response to exercise, and heart function is nml -- pacer is probably unnecessary.