A 62-year-old woman with acute decompensated heart failure (NYHA Class IV, pulmonary edema) on chronic furosemide is admitted to the ICU. She is hypotensive (SBP 92 mmHg) and oligouric. Before escalating to inotropic support, which investigation is most appropriate to differentiate the underlying hemodynamic state?

## Hemodynamic Assessment in Acute Decompensated HF **Key Point:** Pulmonary artery catheterization (Swan-Ganz catheter) is the gold-standard invasive investigation to classify hemodynamic profiles in acute decompensated heart failure and guide therapy. ### Why PAC with Hemodynamic Profiling? The patient presents with signs of **congestion (pulmonary edema) + hypoperfusion (hypotension, oliguria)**. This is a **"cold and wet"** profile — the worst prognostic category. PAC directly measures: 1. **Pulmonary capillary wedge pressure (PCWP)** — reflects LV filling pressure; elevated (>18 mmHg) confirms congestion 2. **Cardiac output (CO)** — low (<4 L/min) confirms hypoperfusion 3. **Systemic vascular resistance (SVR)** — elevated in cardiogenic shock 4. **Mixed venous O₂ saturation (SvO₂)** — low (<60%) indicates inadequate tissue perfusion ### Hemodynamic Profiles in AHF | Profile | PCWP | CO | Clinical | Management | |---|---|---|---|---| | **Warm & dry** | Normal | Normal | Euvolemic, well-perfused | Continue current therapy | | **Warm & wet** | ↑ | Normal | Congestion only | Diuretics, vasodilators | | **Cold & dry** | Normal | ↓ | Hypoperfusion only | Inotropes, fluids | | **Cold & wet** | ↑ | ↓ | **This patient** | Inotropes + diuretics ± vasopressors | **High-Yield:** In "cold and wet" HF, inotropic support (dobutamine, milrinone) is indicated to improve CO; simultaneous diuresis reduces PCWP. PAC guides titration and prognosticates (SvO₂ <60% = poor prognosis). ### Clinical Pearl The ESCAPE trial (2005) showed that routine PAC in acute HF did NOT improve outcomes in stable patients, but it remains the gold standard for **refractory, hemodynamically unstable HF** — exactly this patient's scenario. PAC is indicated when clinical assessment is unreliable or therapy is failing. **Warning:** Do NOT confuse PAC with echocardiography. Echo shows structure and function but **cannot measure pressures or CO directly** in acute settings.