In the OPQRST mnemonic, what does the letter R represent?

• A. Region, Radiation, Recurrence
• B. Radius, Resonance
• C. Repetition, Response
• D. Rate, Rhythm

Answer: (A)

OPQRST is a quick pain assessment used to describe how pain presents. The R focuses on where the pain is and whether it spreads. Region tells you the location of the pain, and Radiation describes if the pain travels to other areas. This distinction helps clinicians judge the pattern of pain, which can influence diagnosis and urgency—for example, pain from the heart often radiates to the arm or jaw, while localized pain stays in one spot. So the R is about Region and Radiation. The option that includes those terms matches the intended meaning. The word Recurrence isn’t part of the R component, so it isn’t necessary for defining this letter.