Specific blockers of the angiotensin type1 receptor, angiotensin receptor blockers (ARBs), have been introduced as an alternative to angiotensin-converting enzyme inhibitors (ACEi) for the treatment of heart failure. In comparison with ACEi, ARBs are better tolerated and have similar effects on haemodynamics, neurohormones and exercise capacity. Early studies have suggested that ARBs might have a superior effect on mortality. However, the first outcome trial, ELITE II (Losartan Heart Failure Survival Study), did not show any significant difference between losartan and captopril in terms of mortality or morbidity. This commentary outlines the role of ARBs in the treatment of heart failure.