I was healthy until mid-August of this year. I had a near fainting spell and ended up in the emergency room. I was told to see a heart doctor which I did. I had a treadmill stress test and an angiogram. There was a little blockage that showed on the angiogram but nothing significant. I then had an MRI of my neck done to see if that was causing the problem. The MRI was consistent with boney matestis. They started looking for cancer. Five days later I had 3rd degree heart block and needed a pacemaker. For the next 3 mo they tried to determine what I had. After many, many tests, bone scan, biopsies, ekogram, cardiolite, etc., it was determined I had Sarcoid in the heart and bone marrow. I have started on 40mg of Prednisone a day. Since I have started the prednisone I have noticed that I can't walk across the room and my heart skips many beats and beats fast. I called the doctor and they adjusted my pacemaker so I can walk a little better but I still am very slow and have a hard time going shopping. My questions: Do you know of any clinics that have treated heart sarcoid? What is the best testing done to follow=up on how the medicine is doing in controlling the sarcoid? Would it be the Thallium Cardiolite test? Does Prednisone cause the heart to skip beats or beat fast? It mostly happens within 2 hrs of taking the pills or when I am walking and moving around. Any info on Heart Sarcoid would be appreciated. Thanks