To assess the "O" of the OPQRST mnemonic in a patient who is having chest pain, you should ask:
◦ On a scale of 1 to 10, with 10 being the worst, how would you rate your pain?
◦ How many times has this happened in the past?
◦ Are you having any other signs or symptoms?
◦ What were you doing when the pain began?