Hospital Massacre

The name of this movie is Hospital Massacre released in 1981-10-16 and it's main theme is Divorcee Susan Jeremy goes to a local Los Angeles county hospital for a routine exam and finds herself stranded there while a maniac, dressed in a doctor's surgical mask and clothing, goes around killing all the staff are associated with her. Could it possibly be the psycho Harold, who killed a friend of Susan's on Valentine's Day 19 years earlier?.