Case Study — Cardiac
Acute Heart Failure NGN Case Study
A Next Gen NCLEX-style unfolding case. Read each step, commit to your own answer — out loud or on paper — and only then reveal ours. The six steps mirror the NCSBN Clinical Judgment Measurement Model exactly as the exam tests it.
15 min activity · Cardiac
Educational use only. This case is a learning exercise with simplified values, not a treatment protocol — real heart failure care follows provider orders, your facility’s protocols, and the patient’s individualized regimen. This material supports nursing education and exam review. It is not medical advice and is not a substitute for clinical judgment, institutional policy, or medical direction. Always follow facility protocols and current provider orders.
The Scenario
2030, ED: Mrs. Okada, 74, with known heart failure (reduced ejection fraction), hypertension, and atrial fibrillation, comes in because she “can’t catch her breath lying down anymore” — three pillows last night, then a recliner. Her daughter mentions a family barbecue weekend: “lots of ham and chips,” and grandma “didn’t want to take her water pill before the long car ride.”
2040 Assessment
- HR 102 irregularly irregular · BP 158/92 · RR 26 · SpO₂ 89% RA · Temp 36.8°C
- Weight 68.2 kg — home log shows 65.5 kg three days ago (+6 lb)
- Crackles in both lower lung fields; S3 heard; speaking in short sentences, worse when flat
- 2+ pitting edema to mid-shin bilaterally; JVD visible at 45°
- Home meds: furosemide (skipped ×2 days), lisinopril, metoprolol, apixaban
Step 1 — Recognize Cues
Which findings are most relevant — and which matter most right now? List the cues you would flag before revealing.
▸Reveal answer
The congestion cluster: orthopnea (three pillows → recliner), bilateral crackles, S3, JVD, 2+ edema, SpO₂ 89%, and the most objective cue in heart failure — a 6-pound weight gain in three days. That is roughly three liters of retained fluid, on a scale, in writing.
The why cues: a sodium-heavy weekend plus two skipped furosemide doses — the two most common triggers of decompensation, both teachable.
The trap: reading BP 158/92 as “at least the pressure’s fine.” In decompensated HF, hypertension is often part of the problem (afterload the failing ventricle can’t push against) — not reassurance.
Step 2 — Analyze Cues
What conditions could explain this picture? Labs return: BNP markedly elevated, troponin normal, creatinine 1.4 (baseline 1.1), potassium 4.2. Chest X-ray: pulmonary vascular congestion. Connect the cues.
▸Reveal answer
Acute decompensated heart failure (most supported): known HFrEF + volume triggers + the full congestion exam + high BNP + congested X-ray. This is a volume-overloaded, “warm and wet” decompensation.
Worth excluding: acute MI as the trigger (troponin normal, no chest pain — but ischemia can decompensate a failing heart, so the 12-lead matters), pneumonia (no fever, bilateral wet crackles rather than focal findings), and rapid afib driving the episode (rate 102 — elevated but not the 140s+ story).
The creatinine bump reflects a congested, underperfused kidney — expect it to improve with decongestion, but it shapes diuretic monitoring.
Step 3 — Prioritize Hypotheses
Rank what threatens her, in order. What is the trajectory you are racing?
▸Reveal answer
1. Oxygenation — fluid is filling the lungs; SpO₂ 89% and climbing crackles are the steps toward flash pulmonary edema: sudden severe dyspnea, pink frothy sputum, panic. That is the cliff edge this case walks.
2. The volume itself — three liters of excess fluid is the cause; decongestion (diuresis) is the treatment for both the lungs and the kidneys.
3. The rhythm and the trigger — her afib needs watching (decompensation and diuresis both provoke rate problems and electrolyte shifts), and the dietary/adherence trigger needs fixing before discharge or she’s back in a month.
Step 4 — Generate Solutions
What should the next hour look like? Draft your actions and anticipated orders.
▸Reveal answer
Immediate nursing actions: sit her fully upright with legs dependent (gravity is a free diuretic for the lungs), oxygen titrated to target, continuous monitoring (that afib), IV access, and reassurance — air hunger feeds catecholamines, which feed the spiral.
Anticipated orders: IV furosemide (IV beats her missed oral dosing — gut edema impairs absorption), possibly IV vasodilator (nitroglycerin) for the hypertensive congestion per protocol, strict I&O with a urinary catheter if needed for accurate measurement, daily weights ordered from tonight, fluid and sodium restriction, repeat electrolytes after diuresis, 12-lead EKG.
What you will NOT see — and must not run: maintenance IV fluids or a saline bolus. Any unprompted fluids in a congested HF patient are an error to question, not a default to hang.
Step 5 — Take Action
2230, two judgment moments: (a) After 80 mg IV furosemide she has put out 1,400 mL and feels “much lighter,” but now reports leg cramps; the repeat potassium is 3.2. (b) The 0900 med list for tomorrow still shows her home metoprolol. A colleague asks, “Hold the beta-blocker since she’s in failure, right?” What do you do with each?
▸Reveal answer
(a) Replace the potassium per orders and keep watching. Brisk diuresis drains potassium (and magnesium); cramps at K⁺ 3.2 in a cardiac patient on the monitor is a dysrhythmia setup — especially in afib. Electrolyte checks after every aggressive diuresis are not optional paperwork.
(b) Don’t reflexively hold it — clarify with the provider. The modern rule: established beta-blocker therapy is usually continued through a decompensation unless the patient is hypotensive, bradycardic, or in cardiogenic shock — stopping it abruptly worsens outcomes (and her afib rate would say thank you, then run). What you don’t do is decide either way silently: this is a verify-with-the-team moment, with her current vitals in hand.
Ongoing: reassess lungs and breathing after each intervention, track I&O hourly, and chart the trend — tonight’s numbers are tomorrow’s baseline.
Step 6 — Evaluate Outcomes
Day 3: weight 65.9 kg (down 5 lb), crackles only at the bases, sleeping on one pillow, SpO₂ 95% RA, potassium 4.0 on supplements, creatinine back to 1.1. Discharge planning starts. Which findings show success — and what teaching decides whether she returns?
▸Reveal answer
Improving: the weight curve (the single best decongestion meter), clearing lungs, resolved orthopnea, stable electrolytes, recovered kidney — the volume is off and the organs noticed.
The discharge teaching that matters most: daily weights — same scale, same time, same clothing — with a call threshold (commonly 2–3 lb overnight or 5 lb in a week), sodium limits translated into her actual foods (the ham and chips conversation, kindly), why the “water pill” is the one she can least afford to skip — and a plan for car-trip days rather than skipping (timing the dose, planning stops), recognizing early decompensation (pillow count rising, shoes tight, nighttime cough), and medication review with teach-back.
The honest frame: heart failure isn’t cured between admissions — it’s managed daily at home. The scale and the salt shaker decide her readmission risk more than anything prescribed today.
Debrief — The Pattern to Keep
- ✦Rapid weight gain is the most objective heart-failure cue — ~1 kg ≈ 1 L of fluid; 6 lb in 3 days is the alarm, not the ankles.
- ✦Upright, oxygen, IV diuretic, no IV fluids — the decompensation sequence; question any unprompted saline in a congested patient.
- ✦Aggressive diuresis = electrolyte checks; hypokalemia in a monitored cardiac patient is a dysrhythmia setup.
- ✦Established beta-blockers usually continue through decompensation (clarify, don't silently hold) — abrupt withdrawal harms.
- ✦Discharge teaching is the treatment: daily weights with a call threshold, sodium in their real foods, and never skipping the diuretic.