Study topic
Heart failure and drug management
NCLEX heart failure chapter: left vs right failure cues, acute pulmonary congestion priorities, digoxin toxicity with low potassium, and ACE / beta-blocker / diuretic safety.
Heart failure care on the NCLEX is a map of where the fluid sits, how hard the client is working to breathe, and which cardiac drugs become dangerous when the heart rate or potassium slips.
Left vs right: read the backup
| Side | Where fluid shows | Common cues |
|---|---|---|
| Left | Lungs | Dyspnea, orthopnea, crackles, low SpO2, cough, frothy sputum in severe failure |
| Right | Systemic veins | Jugular venous distention, dependent edema, weight gain, hepatic congestion/ascites picture |
Many clients eventually show both. Prioritize the breathing and oxygenation problem in front of you when the lungs are wet.
Acute decompensated failure
Crackles climbing the lung fields, SpO2 in the 80s on room air, JVD, and new orthopnea mean the client needs immediate support, not a leisurely full bath.
- Sit the client upright (high Fowler's as tolerated).
- Apply oxygen per order/protocol and reassess SpO2 and work of breathing.
- Anticipate loop diuretic therapy and other ordered preload/afterload reducers (for example IV nitroglycerin when ordered and BP allows).
- Monitor urine output, weight trend, lung sounds, and blood pressure after diuresis.
Digoxin with diuretics
Digoxin slows and strengthens the pump within a narrow safety window. Toxicity looks like GI upset, visual halo changes, and bradycardia or dysrhythmias. Hold the dose, assess apical rate, check recent potassium, and notify.
Safety
A client on digoxin and furosemide with potassium 3.1, nausea, yellow-green halos, and apical rate in the 50s is a hold-and-call picture, not a “give and recheck later” picture.
Antihypertensives and diuretics that hitchhike on HF care
ACE inhibitors (e.g., lisinopril)
- Teach a persistent dry cough as a common effect to report if bothersome.
- Facial/lip swelling or airway symptoms: treat as angioedema. Hold the drug and escalate immediately.
- Monitor for hyperkalemia and rising creatinine per protocol.
Beta-blockers (e.g., metoprolol)
- Count the apical pulse before giving. Hold for marked bradycardia per parameter (commonly under 60 unless a different order exists).
- Do not stop abruptly without a plan (rebound risk).
- In diabetes, warn that tachycardia from hypoglycemia may be blunted; teach other cues.
Diuretics
| Drug | Watch for | Teaching point |
|---|---|---|
| Furosemide (loop) | Hypokalemia, volume depletion, ototoxicity with rapid IV push risk | Report muscle weakness, cramps, dysrhythmia cues; take as timed for sleep disruption |
| Spironolactone (K+-sparing) | Hyperkalemia | Avoid potassium salt substitutes and unmonitored K+ pills |
| Thiazides (when used) | Hypokalemia, other electrolyte shifts | Same potassium vigilance as other wasting diuretics |
Lifestyle still counts beside the pillbox: a DASH-style pattern (more fruits/vegetables, less sodium) supports blood pressure and heart-failure sodium limits when the diet order allows.
Priority map
| Picture | First move |
|---|---|
| Wet lungs + hypoxia in HF | Upright, oxygen, diurese/unload as ordered |
| Digoxin + low K+ + nausea/halos/bradycardia | Hold digoxin, treat the safety cluster, notify |
| ACE + facial swelling | Hold drug; airway emergency pathway |
| Beta-blocker + apical 52 | Hold and clarify before giving |
| Spironolactone + salt substitute habit | Stop the substitute; teach hyperkalemia risk |
Must know
- 1Left-sided failure: pulmonary congestion (dyspnea, orthopnea, crackles, low SpO2). Right-sided: systemic congestion (JVD, edema, hepatic congestion).
- 2Acute decompensated HF with crackles and hypoxia: upright position, oxygen, diuresis as ordered, reduce preload/afterload per orders. Do not lay flat for comfort.
- 3Digoxin toxicity: anorexia/nausea, visual changes (yellow-green halos), bradycardia/dysrhythmias. Hold and notify.
- 4Hypokalemia raises digoxin toxicity risk. Loop diuretics (furosemide) commonly cause low K+.
- 5Before a beta-blocker (metoprolol): check apical HR. Hold and clarify for marked bradycardia (e.g., 52/min when the hold parameter is typically under 60 unless ordered otherwise).
- 6ACE inhibitor persistent dry cough is common and reportable. Facial swelling/angioedema is an emergency hold.
- 7Spironolactone: potassium-sparing. Avoid potassium salt substitutes and unmonitored K+ supplements.
- 8Beta-blockers can mask hypoglycemia symptoms in diabetes. Teach alternate warning signs (sweating may still appear).
- 9Blood-pressure lifestyle teaching still matters: DASH-style eating (more produce, less sodium) supports drug therapy.
Memory hooks
Left = lungs; right = rest of body
Left-sided backup fills the lungs. Right-sided backup fills the veins, ankles, and liver picture.
Low K makes dig dig deeper
Furosemide-driven hypokalemia plus digoxin is a toxicity setup. Check K+ and hold digoxin when toxicity cues appear.
ACE cough; ACE face = stop
A dry cough on an ACE inhibitor is expected and bothersome. Lip/face swelling is angioedema: stop and escalate.
How it's tested
Stems stack crackles and orthopnea with a drug choice, or digoxin nausea with a potassium of 3.1 and a slow apical rate. Distractors give digoxin through toxicity cues, encourage salt substitutes on spironolactone, or treat ACE angioedema like a mild cough.