A nurse notes an increased heart rate in a patient with heart failure. Which compensatory mechanism is likely at play?
Increased secretion of natriuretic peptides
Activation of the sympathetic nervous system
Increased cardiac fibrosis
Inhibition of the renin-angiotensin-aldosterone system
The Correct Answer is B
A. Natriuretic peptides promote vasodilation and diuresis but do not directly increase heart rate.
B. Activation of the sympathetic nervous system increases heart rate and contractility to maintain cardiac output in heart failure.
C. Cardiac fibrosis is a pathological change, not a compensatory mechanism causing increased heart rate.
D. The renin-angiotensin-aldosterone system is usually activated, not inhibited, in heart failure.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. The apical pulse should be measured for a full 1 minute, not just 30 seconds, before administering digoxin.
B. Nausea, vomiting, and anorexia are early signs of digoxin toxicity, so evaluating the client for these symptoms is appropriate.
C. Clients on digoxin should consume potassium-rich foods to prevent hypokalemia, which increases the risk of digoxin toxicity.
D. Digoxin is usually withheld if the heart rate is below 60 bpm, not above 100 bpm. Tachycardia (heart rate >100) is not a reason to withhold digoxin.
Correct Answer is D
Explanation
A. Reporting bacterial meningitis is not optional; it is a reportable disease due to its public health significance.
B. It is necessary to report all cases of bacterial meningitis to monitor and control outbreaks.
C. All cases, regardless of severity, must be reported, not just severe cases.
D. Bacterial meningitis is a nationally notifiable disease, meaning cases must be reported to the Centers for Disease Control and Prevention (CDC) to help track and prevent spread.
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