Left-Sided vs Right-Sided Failure
Left-sided HF backs up into the pulmonary circulation, producing crackles, dyspnea, orthopnea, and pink frothy sputum in severe cases. Right-sided HF backs up into the systemic circulation, causing jugular venous distension, hepatomegaly, ascites, and dependent edema. A classic NCLEX trap is a question describing bilateral leg edema and asking you to identify it as a left-sided finding; remember JVD and peripheral edema belong to the right side. Biventricular failure presents with both symptom clusters simultaneously, and BNP levels rise proportionally to ventricular stretch, making a BNP above 400 pg/mL a strong indicator of decompensated failure requiring prompt provider notification.
Priority Nursing Interventions
For acute decompensation, prioritize airway and oxygenation: place the client in high-Fowler's position, apply supplemental oxygen, and prepare for IV loop diuretics such as furosemide. Daily weights are the single best indicator of fluid status; a gain of 2-3 lbs in a day or 5 lbs in a week warrants provider notification. Monitor potassium closely with loop diuretics since hypokalemia increases digoxin toxicity risk and dysrhythmia potential. Restrict sodium to 2 g/day and fluids as ordered. Auscultate lungs before and after diuresis to evaluate effectiveness, and monitor for hypotension since aggressive diuresis can precipitate renal hypoperfusion.
Medications and Teaching Traps
ACE inhibitors reduce afterload but require monitoring for hyperkalemia, cough, and angioedema; ARBs are substituted when cough is intolerable. Beta-blockers like carvedilol are started at low doses in stable HF, not during acute exacerbation, because they can worsen acute decompensation. Digoxin narrow therapeutic range (0.5-2.0 ng/mL) means you must assess apical pulse for a full minute and hold the dose below 60 bpm in adults. Teach clients to weigh themselves daily at the same time, avoid high-sodium processed foods, and report sudden weight gain, increased dyspnea, or swelling immediately rather than waiting for a scheduled appointment.