a. True. According to the most recent MHRA guidance, patients with implanted pacemakers must not be examined by magnetic resonance (MR) diagnostic equipment. No provision is currently made for MR-safe pacemakers.
b. False. Patients should be monitored carefully; heat generation in the prosthesis is a potential problem.
c. False. Patients with non-ferromagnetic clips (titanium, tantalum, vanadium) can be examined.
d. False. The force from the external magnetic field is minimal compared with the force exerted by the beating heart.
e. False. The decision to scan should be based on the balance of clinical benefit and risks (which remain unknown, with excessive heating being potentially harmful).
