Final answer:
The procedure that is the exception to being carried out outside the operating room is the repair of a stenosed mitral valve, as it generally requires open-heart surgery.
Step-by-step explanation:
The correct option is E:
The procedure carried out outside of the operating room that is the exception is E) Repair of a stenosed mitral valve. In medical procedures, there are various operations and interventions that can be performed outside a traditional operating room. Percutaneous insertion of a left ventricular assist device (A), insertion of an automatic cardiac defibrillator (B), removal of a pacemaker lead (C), and insertion of a carotid artery stent (D) all typically involve minimally invasive techniques administered in specialized settings, such as catheterization laboratories, rather than a traditional surgical suite.
However, the repair of a stenosed mitral valve (E) usually requires open-heart surgery with cardiopulmonary bypass support and is done in an operating room, making it the correct answer as the exception to the procedures that can be carried out outside of the operating room.