Acute decompensated heart failure

ADHF Basics - The Pump Falters

• Definition: Acute or sub-acute worsening of chronic heart failure signs and symptoms, requiring urgent medical intervention. It represents a catastrophic failure of the heart's pumping ability, leading to systemic/pulmonary congestion (wet) or hypoperfusion (cold).
• Precipitants (📌 FAILURE):
  • Forgot Meds (non-compliance)
  • Arrhythmia (e.g., AFib)
  • Ischemia/Infarction
  • Lifestyle (↑Na+/fluid)
  • Upregulation (infection)
  • Renal failure
  • Embolism (Pulmonary)

⭐ The most common cause of right-sided heart failure is left-sided heart failure.

Presentation & Phenotypes - Signs of Sinking

Key signs are driven by two axes: congestion (wet) and hypoperfusion (cold).

• Congestion ("Wet"):
  • Pulmonary: Rales, orthopnea, paroxysmal nocturnal dyspnea (PND).
  • Systemic: Jugular venous distension (JVD), peripheral edema, ascites.
• Hypoperfusion ("Cold"):
  • Cool extremities, altered mental status, narrow pulse pressure, worsening renal function.

⭐ "Warm & Wet" is the most common clinical phenotype, presenting with adequate perfusion but significant congestion.

Diagnostics - Confirming the Crisis

• Labs:
  • ↑ BNP (>400 pg/mL) or NT-proBNP.
  • Troponins (rule out ACS), renal function (BMP).
• Imaging:
  • ECG: Check for ischemia, arrhythmia triggers.
  • CXR: Cardiomegaly, cephalization, Kerley B lines, pleural effusion.
  • Echocardiogram (Key): Assesses LVEF, diastolic function, valves, filling pressures.

⭐ A normal BNP level (<100 pg/mL) has a high negative predictive value, making ADHF unlikely.

Management - Stemming the Tide

Initial stabilization focuses on identifying the clinical profile: congestion ("wet" vs. "dry") and perfusion ("warm" vs. "cold"). This guides therapy.

• Immediate Interventions (📌 LMNOP):

  • Lasix (Furosemide): IV bolus, typically 2-2.5x the patient's home oral dose.
  • Morphine: For severe dyspnea and anxiety; causes venodilation. Use cautiously.
  • Nitrates (Nitroglycerin): Reduces preload and afterload. Best for patients without hypotension.
  • Oxygen: Maintain SpO₂ > 90%; consider BiPAP for respiratory distress.
  • Position: Have the patient sit upright with legs dangling to reduce preload.

• Profile-Guided Therapy:

  • Congestion ("Wet"): IV loop diuretics are the cornerstone. For refractory edema, consider adding a thiazide diuretic.
  • Hypoperfusion ("Cold"): If systolic BP is < 90 mmHg, start inotropes (Dobutamine, Milrinone) to improve cardiac output.

⭐ High-Yield: Avoid initiating or uptitrating beta-blockers during an acute decompensation episode. They can be continued only if the patient is on a stable chronic dose and not in cardiogenic shock.

High-Yield Points - ⚡ Biggest Takeaways

• Acute decompensated heart failure (ADHF) is a clinical diagnosis, often triggered by non-compliance, arrhythmias, or ischemia.
• The "warm & wet" profile (well-perfused but congested) is the most common presentation, treated with IV diuretics and vasodilators.
• "Cold & wet" patients (hypoperfused and congested) may require inotropes (dobutamine) if hypotensive.
• Always assess for and address the underlying precipitant of decompensation.
• Do not initiate beta-blockers and use caution with existing doses during acute decompensation.