Dear Dr. Roach: In October 2014, I had my aortic valve replaced, and a pacemaker was put in. I was put on 100 mg of metoprolol daily — then 50 mg, then 25 mg. I have been off this medicine for six ...

DEAR DR. ROACH: In October 2014, I had my aortic valve replaced, and a pacemaker was put in. I was put on 100 mg of metoprolol daily — then 50 mg, then 25 mg. I have been off this medicine for six ...

Dear Dr. Roach • In October 2014, I had my aortic valve replaced, and a pacemaker was put in. I was put on 100 mg of metoprolol daily — then 50 mg, then 25 mg. I have been off this medicine for six ...

Sick sinus syndrome (SSS) is a heart rhythm problem that affects your heart's natural pacemaker. You may develop symptoms of SSS like dizziness, fainting, and fatigue. Treatment may include lifestyle ...