# Three adults present with acute dyspnea. For each cue cluster, select the diagnosis it most strongly supports. > source: MyMerci (mymerci.kr) > url: https://mymerci.kr/pages/nclex_q.php?qn_id=393397&lang=en > language: en > subject: Medical Emergencies > category: PA ## Question Three adults present with acute dyspnea. For each cue cluster, select the diagnosis it most strongly supports. | | Acute decompensated heart failure | Community-acquired pneumonia | Acute pulmonary embolism | | --- | --- | --- | --- | | Three days of worsening orthopnea, a 3-kg weight gain, jugular venous distention, and bilateral pitting edema | | | | | An S3 with diffuse bilateral B-lines and interstitial edema; no fever or purulent sputum | | | | | Fever, new purulent cough, focal bronchial breath sounds, and a new lobar infiltrate | | | | | New cough and hypoxemia with leukocytosis and a focal infiltrate; no jugular venous distention or edema | | | | | Sudden dyspnea and pleuritic pain after prolonged immobility with unexplained tachycardia and no new focal infiltrate | | | | | Acute hypoxemia with unilateral calf swelling and right-heart strain; no recent weight gain or fever | | | | ## Explanation Acute decompensated heart failure is supported by progressive congestion such as orthopnea, rapid weight gain, jugular venous distention, bilateral edema, an S3, and bilateral interstitial or alveolar edema. Community-acquired pneumonia is supported by a new pulmonary infiltrate together with respiratory symptoms and systemic or inflammatory findings such as fever, purulent cough, focal abnormal breath sounds, or leukocytosis. Pulmonary embolism is supported by sudden unexplained dyspnea or pleuritic pain, tachycardia, hypoxemia, venous-thromboembolism risk, unilateral leg findings, or right-heart strain. These patterns guide priorities but do not replace formal diagnostic testing, and more than one condition can coexist. ## In-depth explanation Correct Answer Classify progressive systemic and pulmonary congestion as acute decompensated heart failure, a new focal infiltrate with infectious respiratory findings as community-acquired pneumonia, and sudden symptoms with venous-thromboembolism cues or right-heart strain as pulmonary embolism. Why It Fits Dyspnea and hypoxemia overlap across all three conditions. Timing, distribution of findings, risk factors, and imaging create a more discriminating cue cluster than any single symptom. Clinical Picture Orthopnea and systemic congestion point toward heart failure. Fever, cough, focal lung findings, and a new infiltrate support pneumonia. Sudden pleuritic symptoms, unilateral leg findings, and right-heart strain increase concern for pulmonary embolism. Memory Link Congestion builds, infection localizes, embolism strikes suddenly. NCLEX Rule Stabilize first when breathing or circulation is threatened. Then interpret the whole cluster and avoid treating a normal or nonspecific single finding as a rule-out test. Why the Alternatives Fail Crackles alone do not prove heart failure, pleuritic pain alone does not prove embolism, and fever may be absent in some infections. A diagnosis chosen from one isolated cue ignores overlap, comorbidity, and severity. Source 12022 AHA/ACC/HFSA Heart Failure Guideline 22019 ATS/IDSA Community-Acquired Pneumonia Guideline 32019 ESC Acute Pulmonary Embolism Guideline 42026 NCLEX-RN Test Plan ## Clinical scenario The nurse compares the pattern, timing, risk factors, physical findings, and available imaging rather than assigning a diagnosis from one symptom. Immediate airway, breathing, circulation, oxygenation, and hemodynamic instability are managed while diagnostic evaluation proceeds. ## Key concepts - **Clinical Congestion** — A pattern of elevated filling pressures and fluid accumulation suggested by findings such as orthopnea, jugular venous distention, edema, rapid weight gain, and pulmonary interstitial or alveolar edema. - **Pulmonary Infiltrate** — A new opacity on chest imaging that is interpreted with respiratory and systemic findings. In community-acquired pneumonia, it supports the diagnosis when paired with a compatible clinical syndrome. - **Pretest Probability for Pulmonary Embolism** — The estimated likelihood of pulmonary embolism before definitive imaging, based on symptoms, timing, venous-thromboembolism risks, examination findings, and validated clinical assessment. ## Related questions - [A nurse is caring for an alert adult client with type 1 diabetes who reports tremors, swea…](https://mymerci.kr/pages/nclex_q.php?qn_id=360524&lang=en) - [A 58-year-old client arrives at the emergency department with crushing substernal chest pa…](https://mymerci.kr/pages/nclex_q.php?qn_id=362976&lang=en) - [A 72-year-old client is brought to the emergency department by family who report that the …](https://mymerci.kr/pages/nclex_q.php?qn_id=363003&lang=en) - [A 79-year-old client is admitted from a long-term care facility with diarrhea, decreased o…](https://mymerci.kr/pages/nclex_q.php?qn_id=363089&lang=en) - [A 68-year-old client is admitted to the emergency department with suspected sepsis from a …](https://mymerci.kr/pages/nclex_q.php?qn_id=363987&lang=en) - [A nurse is caring for an adult client in the emergency department who is suspected to have…](https://mymerci.kr/pages/nclex_q.php?qn_id=363993&lang=en) - [A nurse is teaching a 72-year-old client with chronic heart failure (reduced ejection frac…](https://mymerci.kr/pages/nclex_q.php?qn_id=366202&lang=en) - [A nurse is caring for an adult client admitted with diabetic ketoacidosis. 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