VE also know as pvcs premature ventricular contractions and SVE also known as pacs premature atrial contractions. Almost everyone with have some of one or the other or both on a 24 hour monitor
VE = ventricular ectopics (beats originating from the hearts main chambers)
SVE = supraventricular ectopics (beats originating from upper chambers, except sinus node)
Hope this helps.