When planning preoperative cardiac care for a patient with mitral valve prolapse, which intervention should the nurse prioritize?

Choice A rationale Conducting regular glucose monitoring is essential for patients with diabetes mellitus to prevent complications like hypoglycemia or ketoacidosis. However, mitral valve prolapse is a structural abnormality of the heart valve and does not inherently affect pancreatic function or insulin resistance. Unless the patient has a co-existing metabolic disorder, prioritizing glucose checks over cardiac-specific interventions would be inappropriate. The nurse must focus on the risks specifically associated with the mechanical dysfunction of the mitral valve. Choice B rationale Patients with mitral valve prolapse are at an increased risk for developing infective endocarditis, especially if there is associated regurgitation. During invasive procedures, bacteria can enter the bloodstream and adhere to the irregular surface of the prolapsed valve. Educating the patient on antibiotic prophylaxis before certain dental or surgical procedures is a high priority to prevent this life-threatening infection. Preventing the colonization of the heart valves is a foundational element of long-term management and preoperative planning for these patients. Choice C rationale Encouraging increased fluid intake is generally used to maintain hydration or to help thin respiratory secretions. In the context of cardiac care, however, excessive fluids can sometimes lead to volume overload, particularly if the mitral valve prolapse has progressed to significant mitral regurgitation and heart failure. While maintaining normal hydration is important, it is not a specific priority for mitral valve prolapse and could potentially be harmful if the patient's compensatory mechanisms are already stressed by valvular dysfunction. Choice D rationale A low-sodium diet (typically less than 2,000 mg per day) is often recommended for patients with heart failure or hypertension to reduce fluid retention. While this might be part of a general heart-healthy lifestyle, it is not the primary preoperative priority for a patient with mitral valve prolapse unless they are already showing signs of symptomatic heart failure. The most immediate concern for a stable patient with this condition is the prevention of endocarditis rather than strict dietary sodium restriction.