What does the irregular heartbeat symbol mean on the BP7250 display?

The irregular heartbeat symbol appears when an irregular rhythm is detected 2 or more times during a measurement, defined as a rhythm that is 25% less or 25% more than the average rhythm detected during the measurement. A symbol with a short indicator appears when detected 2 times, and a longer indicator appears when detected 3 or more times. The symbol may also appear if the monitor detects arm movement, so ensure you remain still during measurements. If it continues to appear, consult your physician. (Page 16-17)