A client with unstable angina is scheduled for coronary artery bypass grafting (CABG). The client asks the nurse about the purpose of this surgery. How should the nurse respond?

A) This choice is incorrect because sharp, stabbing pain is not typically associated with angina pectoris. It may be more characteristic of conditions like pleuritis or musculoskeletal pain.

B) This choice is incorrect because constant, burning pain is not typical of angina pectoris. It may be associated with conditions like heartburn or gastroesophageal reflux disease (GERD).

C) This choice is correct. Angina pectoris is often described as a crushing or pressure-like pain in the chest, which can be triggered by exertion or emotional stress. The pain may also radiate to the neck, jaw, or left arm.

D) This choice is incorrect because radiating pain to the left arm is associated with both angina pectoris and myocardial infarction (MI), but it is not specific enough to differentiate between the two conditions.

A) This choice is incorrect because while rest is essential during an angina episode, lying down in bed for an extended period is not necessary after administering nitroglycerin.

B) This choice is incorrect because monitoring blood pressure and heart rate every 15 minutes is not a standard nursing intervention after nitroglycerin administration. Monitoring vital signs as needed for the client's condition is appropriate.

C) This choice is incorrect because there is no need for the client to avoid drinking water or fluids after taking sublingual nitroglycerin.

D) This choice is correct. After taking sublingual nitroglycerin for chest pain relief, the client should sit or lie down and avoid sudden position changes. Nitroglycerin can cause systemic vasodilation and may lead to orthostatic hypotension, increasing the risk of dizziness or falls if the client stands up abruptly. Taking a seated or lying position reduces this risk and allows the medication to work effectively to relieve chest pain.