AHA/ACC/ESC/WHF Expert Consensus Document: Second Universal Definition of Heart Failure (2026).

The Second Universal Definition of Heart Failure (2026) standardizes classification into reduced, preserved, and improved ejection fraction categories, moving beyond rigid cutoffs.

• Why it matters: Ambiguity in HF definitions has hindered research, diagnosis, and prevention efforts globally, especially across diverse populations and healthcare systems.
• What they did: The consensus involved expert collaboration to create a comprehensive framework, including a universal classification of causes and recognition of social and geographic influences on HF.
• The result: This standardized approach aims to improve early detection, management, and prevention of HF worldwide, ultimately enhancing patient outcomes and advancing cardiovascular health.