There is provided an apparatus (12) for use in measuring blood pressure. The apparatus (12) comprises a processor (102) configured to acquire a signal indicative of pressure oscillations detected inside a cuff inflated to pressurize a measurement site of a subject undergoing cardiopulmonary resuscitation. The pressure oscillations detected inside the cuff are indicative of a pulse of the subject. The processor (102) is also configured to trigger a blood pressure measurement for the subject based on the pressure oscillations detected inside the cuff.