How important is the cause of heart failure in determining prognosis?

Prof Gerhard Poelzl discusses the importance of determining the cause of heart failure for prognosis prediction and the limitations of using ejection fraction alone. The study explores the connection between etiology, ejection fraction, and mortality in chronic heart failure. The findings reveal significant effects of etiology on mortality through ejection fraction and highlight the importance of clarifying the cause of heart failure for risk stratification and decision-making.