Can the level of stimulation in the first controlled operation mode cause cardiac stimulation in patients without implanted devices?

The level of stimulation in the first controlled operation mode is not sufficient to cause cardiac stimulation in patients without implanted devices. This operational mode is specifically designed to minimize interactions with biological tissues and to keep patients safe from possible adverse effects, such as those related to cardiac function.

In general, MRI systems operate within established safety standards, and the first controlled operation mode adheres strictly to guidelines that limit the types of interactions that can occur with the body. The induced currents are generally low enough that they do not reach levels that could stimulate nerve or muscle tissue, including the heart, in individuals without any implanted devices.

Therefore, the correct answer indicates that in the absence of implanted electronic devices, the risk of cardiac stimulation is effectively mitigated, reinforcing the safety measures that are in place during MRI procedures.