PQRST are the sixteenth through twentieth letters of the ISO basic Latin alphabet and may refer to that alphabet as a whole.
PQRST may refer to: The PQRST method, a method of studying OPQRST, a mnemonic initialism used by persons performing first aid, omitting O for Onset of the event The part of the Alphabet song One complete heartbeat in the ECG (P-wave, QRS complex, T-wave)