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 nitroglycerin tablets should not be swallowed immediately; they are designed to dissolve under the tongue to provide rapid relief from chest pain.
B: This choice is incorrect as nitroglycerin tablets do not need to be taken with water; they should dissolve sublingually and taking them with water could dilute the medication, reducing its effectiveness.
C: This choice is incorrect because crushing the tablet and mixing it with food would delay and potentially reduce the absorption of the medication, which is critical during an episode of angina.
D: This is the correct instruction because nitroglycerin tablets are very sensitive to light and moisture, which can reduce their effectiveness. Keeping them in their original bottle ensures they are protected from environmental factors that could degrade the medication.

A) This choice is incorrect because smoking is a modifiable risk factor for MI. Cessation of smoking can significantly reduce the risk of developing MI and other cardiovascular diseases.

B) This choice is incorrect because a sedentary lifestyle is a modifiable risk factor for MI. Engaging in regular physical activity can help reduce the risk of MI.

C) This choice is incorrect because diabetes mellitus is a modifiable risk factor for MI. Managing diabetes through lifestyle changes, medications, and blood sugar control can help reduce the risk of cardiovascular complications, including MI.

D) This choice is correct. A family history of MI is a non-modifiable risk factor because it is based on genetic factors that cannot be changed through lifestyle modifications. Having a close relative with a history of MI increases an individual's risk of developing MI, but it cannot be altered or eliminated through lifestyle changes.