# Heart Failure Gets a New Definition, Experts Say It Will Transform Care
Cardiologists have redefined heart failure, shifting how doctors diagnose and treat millions of patients worldwide. The new definition broadens understanding of the condition beyond traditional measures of heart pumping function, allowing earlier detection and intervention.
Heart failure historically focused on ejection fraction, a metric measuring how much blood the heart pumps with each beat. The updated framework recognizes that patients can experience heart failure symptoms and damage even when this number appears normal. This distinction matters because roughly half of all heart failure cases involve preserved ejection fraction, yet many patients with this type go undiagnosed or undertreated.
The revised definition emphasizes structural or functional cardiac abnormalities combined with evidence of pulmonary or systemic congestion. This approach captures patients experiencing shortness of breath, fatigue, and fluid retention that standard ejection fraction measurements miss. Cardiologists now consider biomarkers like B-type natriuretic peptide (BNP) and imaging results alongside traditional function assessments.
Dr. Gregg Fonarow, chief of cardiology at UCLA, notes this change enables physicians to identify heart failure earlier, when interventions prove most effective. The redefinition also acknowledges that heart failure develops through multiple pathways, not just weakened pumping capacity. Stiffness in the heart muscle, valve problems, and other structural issues can trigger the same devastating symptoms.
The practical impact extends beyond diagnosis. Insurance coverage, clinical trial enrollment, and treatment protocols often depend on how heart failure gets classified. By expanding the definition, more patients become eligible for proven therapies including newer medications that reduce hospitalizations and improve survival.
Implementation presents challenges. Clinicians must learn new diagnostic criteria, and healthcare systems need updated protocols. Patient awareness also matters. Many people with preserved ejection fraction don't realize they have heart failure, del