Which of the following is a step in treating hypoxia?

Ensuring maximum oxygen under pressure is a critical step in treating hypoxia. Hypoxia occurs when there is a deficiency of oxygen in the tissues, which can happen at high altitudes or due to various physiological conditions. Administering oxygen under pressure increases the amount of available oxygen in the blood and can quickly alleviate the symptoms of hypoxia. This method is commonly used in aviation and medical settings to restore adequate oxygen levels and improve the oxygen-carrying capacity of blood.

In contrast, ascending to a higher altitude would further decrease the ambient pressure and potentially worsen hypoxia rather than treat it. Monitoring heart rate is important for assessing the physiological impacts of hypoxia but does not directly treat the condition itself. Waiting for symptoms to resolve is not a proactive treatment strategy, as timely intervention is necessary to prevent more severe consequences related to oxygen deprivation.