Correct Answer: C

Rationale: Assessing the apical pulse is crucial before administering digoxin because the medication can lead to bradycardia. Monitoring the apical pulse helps determine the heart rate, and digoxin is typically withheld if the pulse is below 60 beats per minute. This assessment is essential to prevent potential adverse effects associated with digoxin administration.

Correct Answer: A

Rationale: If chest pain persists after the first dose of nitroglycerin, it is appropriate to administer a second dose while continuing to monitor the client's response. Nitroglycerin is a vasodilator commonly used to relieve angina symptoms by dilating blood vessels and increasing blood flow to the heart. Reassessing the client's response and providing a second dose may be necessary to achieve adequate pain relief and improve blood flow to the heart.

Correct Answer: A

Rationale: Clients with rheumatic heart disease are at risk for infective endocarditis, a serious infection of the heart lining or valves, and need prophylactic antibiotics before invasive procedures, including dental work, to prevent this life-threatening complication.

Correct Answer: B

Rationale: When assessing a client with a history of left-sided heart failure, the presence of bilateral lung crackles is a key finding to determine if the condition is currently active. Crackles in the lungs indicate fluid accumulation, a common sign of left-sided heart failure due to pulmonary congestion.

Correct Answer: A

Rationale: In the case of an above-the-knee amputation, the priority item that should be available for emergency use is a surgical tourniquet. This is crucial to control severe bleeding that may occur post-operatively.