Multifocal pvcs in a normal heart. What is the risk of developing a ventricular arrythmia?

May be a risk. As in earlier answer, multifocal pvcs may not need treatment. But you should have someone explore for possible causes of pvcs that are reversible. These can be from such things as caffeine, alcohol, other drugs, medications, thyroid disease, and some other illnesses. Some people have many pvcs. We learned that sometimes treatment can be worse than the funny rhythm. But there can be a risk so see doc.