A Williamson County jury on Wednesday awarded a record $8.5 million wrongful-death verdict to the wife of a 60-year-old Marion man who died during elective shoulder surgery.Heartland Regional Medical Center in Marion earlier this week admitted that it was liable for the death of Lowell Williamson.Williamson died a week after hospital employees allegedly administered too much of an anesthetic gas known as Sevoflurane to him. The gas caused Williamson’s blood pressure to drop to dangerously low levels, cutting off the …