03/06/2026
The pacemaker may misinterpret the electromagnetic signals from the ultrasonic scaler as the heart's own natural heartbeat. Believing the heart is beating fine on its own, the pacemaker will stop delivering necessary electrical pulses. For a pacemaker-dependent patient, this sudden pause can cause bradycardia (an unsafely slow heart rate), immediate dizziness, fainting (syncope), or cardiac arrest.
