Affera Basics Practice Test

Navigation systems cut fluoroscopy exposure by providing accurate, real-time catheter localization without relying on continuous X-ray imaging. They build a 3D map of the heart using magnetic or impedance-based tracking, and the catheter’s position is shown on that map as you move. Because you can see where the catheter is and where you plan to ablate on the map, you can navigate to targets with far fewer fluoroscopic images, using fluoroscopy mainly for final verification or safety checks. This approach significantly reduces radiation for the patient and the team. Higher image resolution or other ideas like merely slowing the heart rate don’t inherently lessen the need for fluoroscopy; replacing mapping isn’t appropriate because the map-guided navigation is what enables the reduced exposure.