A patient monitor comprises: an electrocardiograph (14, 20) monitoring an electrocardiographic signal (40) of a patient (10)； a secondary physiological signal monitor (16, 20) monitoring a second physiological signal (50) of the patient concurrently with the electrocardiograph monitoring the electrocardiographic signal of the patient； an alarm condition detector (42, 44) configured to detect an alarm condition based on the electrocardiographic signal of the patient； an alarm condition validator (52, 54, 56) configured to validate the alarm condition based on pulse regularity of a pulsatile component of the concurrently monitored second physiological signal of the patient； and an alarm indicator (24, 26, 58) configured to generate a human perceptible alarm conditional upon both the alarm condition detector detecting an alarm condition and the alarm condition validator validating the alarm condition.
