Final answer:
For a patient with aortic stenosis experiencing acute pain due to decreased coronary blood flow, promoting rest to decrease myocardial oxygen demand is an appropriate nursing intervention. Sublingual nitroglycerin can also be used under physician guidance for managing such chest pain.
Step-by-step explanation:
The appropriate nursing intervention for a patient with aortic stenosis who is experiencing acute pain due to decreased coronary blood flow is to promote rest to decrease myocardial oxygen demand. Resting minimizes the workload on the heart and thus, the need for oxygen, which can help alleviate the chest pain associated with inadequate blood flow, also known as angina. While sublingual nitroglycerin is also used to treat chest pain by increasing coronary blood flow, it should be taken as directed by a physician and in response to specific symptoms.
Additionally, instructions on the use of sublingual nitroglycerin for chest pain may be given so the patient knows how to respond to future episodes of angina. Education about anticoagulant therapy may be necessary if the aortic stenosis has led to conditions such as atrial fibrillation, but this is not directly related to the treatment of acute chest pain. While raising the head of the bed can decrease venous return and decrease the workload on the heart, it is not the first intervention for chest pain caused by aortic stenosis.