Which of the following is a contraindication for NIV?

Respiratory arrest is indeed a contraindication for noninvasive ventilation (NIV). This is primarily because NIV relies on the patient's ability to initiate breaths; if a patient is in respiratory arrest, they are unable to breathe independently, making NIV ineffective and potentially harmful. In such cases, immediate interventions and invasive respiratory support would be necessary, such as intubation, to ensure adequate ventilation and oxygenation.

On the other hand, stable respiratory conditions may require assistance but typically do not preclude NIV. Minor facial deformities might present challenges with mask fit but are not absolute contraindications. Low blood pressure is also not a direct contraindication for NIV; however, it may require careful monitoring and assessment in conjunction with the patient's overall clinical status.