Final answer:
The next intervention that should be performed after the initial assessment of the patient is applying oxygen.
Step-by-step explanation:
The next intervention that should be performed after the initial assessment of the patient is Apply oxygen. The patient's symptoms, such as light-headedness, nausea, and chest discomfort, along with the presence of pale skin and diaphoresis, suggest that there may be a lack of oxygen supply to the body. Applying oxygen can help improve oxygenation and alleviate the symptoms.