No. Ms effects white matter in the brain and spinal cord. It does not effect heart muscle.
No. Ms does not affect ones heart. A medication for ms can.
Not directly. But two MS medications can cause heart issues, including Novantrone, which could result in a vacuolar cardiomyopathy, and Gilenya (fingolimod) which can cause a transient heart block in the first 6 hrs of use, but not longer.