OPQRST is an mnemonic used by medical professionals to accurately discern reasons for a patient's symptoms and history in the event of an acute illness. It is specifically adapted to elicit symptoms of a possible heart attack.[1] Each letter stands for an important line of questioning for the patient assessment.[2][3] This is usually taken along with vital signs and the SAMPLE history and would usually be recorded by the person delivering the aid, such as in the "Subjective" portion of a SOAP note, for later reference.