Which heart failure phenotype is generally associated with the worst prognosis?

• A. HFpEF
• B. HFmrEF
• C. HFrEF
• D. All subtypes have identical prognosis

Answer: (C)

The key idea is that prognosis in heart failure varies by the type of heart failure, and the reduced ejection fraction type is the one most consistently linked to worse outcomes. When the left ventricle’s pumping ability is markedly diminished (ejection fraction well below normal), forward flow to the body is severely limited, leading to ongoing organ hypoperfusion, progressive ventricular remodeling, higher susceptibility to dangerous rhythms, and more frequent hospitalizations. These factors translate into higher mortality risk compared with the preserved-ejection fraction form, where patients often have substantial symptoms but, on average, better survival, though they still carry significant risk due to comorbidities. The mid-range category generally falls between the two in prognosis. So the heart failure phenotype with the worst prognosis is the reduced-ejection-fraction type.