Aim: The purpose of our research was to evaluate the effects of dental electromagnetic devices on the functioning of implanted cardiac devices in patients. Methodology: Biotronik Actros DR+ pacemaker was evaluated at maximum sensitivity on a flat bench top. The pacemaker lead, electronic apex locator, and oscilloscope were connected across a 150-ohm resistor. Pace monitoring was carried out with a Biotronik EPR 1000 programmer and a Tektronix TDS 220 2-channel digital real-time oscilloscope. Results: Four of five electronic apex locators tested did not cause inhibition or interfere with normal pacemaker function. Conclusion: It seems that electronic apex locators can be used safely in patients with pacemakers.