A 52-year-old man with a 10-year history of hypertension presents to the emergency department with acute dyspnea, orthopnea, and peripheral edema. Clinical examination reveals elevated JVP, bilateral crackles, and a third heart sound. Echocardiography shows an ejection fraction of 28% with global hypokinesis. His current medications are enalapril 10 mg daily and amlodipine 5 mg daily. Blood pressure is 145/92 mmHg, heart rate 110 bpm, and respiratory rate 28/min. What is the most appropriate immediate next step in management?

Explanation

## Clinical Scenario Analysis This patient presents with **acute decompensated heart failure (HF)** with reduced ejection fraction (HFrEF, EF 28%), evidenced by: - Acute dyspnea, orthopnea, peripheral edema - Elevated JVP, bilateral crackles, S3 gallop - Tachycardia (110 bpm) and tachypnea (28/min) ## Immediate Management Priorities **Key Point:** In acute decompensated HF, the immediate goal is to reduce pulmonary and systemic congestion and improve tissue perfusion by optimizing cardiac output through preload reduction and afterload management. ### Why Intravenous Diuretics First? 1. **Preload reduction** — IV furosemide rapidly decreases pulmonary capillary wedge pressure (PCWP) and relieves congestion 2. **Symptom relief** — Addresses the acute, life-threatening dyspnea and orthopnea 3. **Improves oxygenation** — Reduces interstitial and alveolar edema 4. **Standard of care** — Guideline-recommended first-line therapy for acute HF with congestion **High-Yield:** The Starling curve principle dictates that in acute HF with elevated preload, moving leftward on the curve (reducing preload) improves cardiac output and symptoms simultaneously. ### Role of Echocardiography - **Confirmation** — Validates the diagnosis and quantifies EF - **Etiology assessment** — Rules out valvular disease, RV involvement, or pericardial effusion - **Prognostic value** — Guides intensity of therapy and follow-up - **Timing** — Urgent (within hours) but not before stabilization **Clinical Pearl:** In acute HF, stabilize first (diuretics, oxygen, vasodilators), then investigate. Delaying diuretics to obtain imaging worsens outcomes. ## Cardiac Output Regulation Context Cardiac output (CO) = Heart rate × Stroke volume (SV) Stroke volume depends on: preload, afterload, and contractility In this case: - **Preload is excessive** (elevated JVP, orthopnea) → diuretics reduce it - **Afterload is elevated** (BP 145/92) → ACE inhibitor already given; may need uptitration - **Contractility is severely reduced** (EF 28%) → inotropes only if hypotensive or cardiogenic shock **Mnemonic: ABCDE of Acute HF** - **A**ssess (history, exam, ECG, troponin, BNP) - **B**reathing support (oxygen, NIV if needed) - **C**ongestion relief (IV diuretics) - **D**rug optimization (ACE-I, beta-blockers, MRAs) - **E**valuation (echo, angiography if indicated) ## Why This Option Is Best IV furosemide addresses the immediate life-threatening congestion, while urgent echocardiography confirms diagnosis and guides long-term therapy. This two-pronged approach is standard practice in acute HF management.