Which situation requires that an emergency patient be moved?

In the context of emergency care, moving a patient is often necessary to ensure their safety and facilitate appropriate medical intervention. When a patient has undergone cardiac arrest while seated in a chair, immediate action is required to provide effective cardiopulmonary resuscitation (CPR) and other life-saving measures. Performing CPR on a patient in a seated position can be challenging and ineffective due to the physical constraints of the chair, which can hinder the rescuer's ability to deliver high-quality compressions.

In contrast, patients who are unresponsive and found on the ground or in their bed with early symptoms of shock may be in a position where immediate movement is not strictly necessary, as their environments do not impede the delivery of care. For patients with inadequate breathing and signs of shock, intervention may require supine positioning for optimal airway management, but the situation doesn't inherently demand immediate relocation if appropriate care can be rendered on-site.

Thus, the correct choice emphasizes the necessity of safely moving a patient in cardiac arrest from a seated position to ensure the effectiveness of resuscitation efforts, highlighting the critical nature of environment and positioning in emergency medical situations.