European heart journal · 2026
Safety of withdrawal of pharmacological treatment after recovery from HER2 therapy-related cardiac dysfunction: the HER-SAFE trial.
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Dowsing B, Dehbi H-M, Andres M S, Chung R, Oashou A, Wilson J M, Hussein I, Meredith B, Pierce I, Ahmed S, Pedra J, Worn O, Howe M, Assadullah S, Schmid P, Roylance R, Crake T, Westwood M, Ghosh A K, Auger D, Plymen C M, Baksi J, Nazir M S, Moon J C, Chen D, Lyon A R, Walker J M, Manisty C H
Аннотация
BACKGROUND: Heart failure therapy (HFT) is routinely continued in breast cancer survivors after recovery from anti-HER2 cancer therapy-related cardiac dysfunction (CTRCD), despite limited evidence. HER-SAFE is the first randomised trial to assess HFT withdrawal in this population.
METHODS: In this open-label, multicentre, randomised controlled trial, breast cancer survivors with recovered anti-HER2 CTRCD (asymptomatic, left ventricular ejection fraction [LVEF] ≥50%, normalised biomarkers) were randomised to HFT withdrawal or continuation. Antecedent CTRCD was mild (relative global longitudinal strain [GLS] decline >15%, LVEF ≥50%), moderate (LVEF fall >10% to <50%), or severe (LVEF <40%). The primary endpoint was a moderate or severe CTRCD event over 12 months analysed by intention to treat; secondary endpoints included serial cardiac function, biomarkers, and quality of life.
RESULTS: Between July 2023 and June 2025, 90 patients were randomised (all female; median age 50 years [IQR 43-59]; median 17.3 months [IQR 7.7-33.2] since CTRCD recovery; HFT predominantly renin-angiotensin system inhibitors [98%] and beta-blockers [88%]) - 46 randomised to HFT withdrawal (1 lost to follow-up) and 44 to continuation. The primary endpoint occurred in 1 of 45 with withdrawal (moderate asymptomatic CTRCD) versus 0 of 44 with continuation (between-group difference 2.2pp; 90% CI upper limit 9.4pp). No cardiovascular deaths, heart failure hospitalisations or symptomatic CTRCD occurred. Cardiac magnetic resonance-derived LVEF remained stable in both arms at 12 months (between-group difference -0.8% [-2.0 to +0.4], p=0.21).
CONCLUSIONS: Among breast cancer survivors with recovered anti-HER2 CTRCD, HFT withdrawal was not associated with symptomatic events or significant between-group difference in LVEF at 12-months.
METHODS: In this open-label, multicentre, randomised controlled trial, breast cancer survivors with recovered anti-HER2 CTRCD (asymptomatic, left ventricular ejection fraction [LVEF] ≥50%, normalised biomarkers) were randomised to HFT withdrawal or continuation. Antecedent CTRCD was mild (relative global longitudinal strain [GLS] decline >15%, LVEF ≥50%), moderate (LVEF fall >10% to <50%), or severe (LVEF <40%). The primary endpoint was a moderate or severe CTRCD event over 12 months analysed by intention to treat; secondary endpoints included serial cardiac function, biomarkers, and quality of life.
RESULTS: Between July 2023 and June 2025, 90 patients were randomised (all female; median age 50 years [IQR 43-59]; median 17.3 months [IQR 7.7-33.2] since CTRCD recovery; HFT predominantly renin-angiotensin system inhibitors [98%] and beta-blockers [88%]) - 46 randomised to HFT withdrawal (1 lost to follow-up) and 44 to continuation. The primary endpoint occurred in 1 of 45 with withdrawal (moderate asymptomatic CTRCD) versus 0 of 44 with continuation (between-group difference 2.2pp; 90% CI upper limit 9.4pp). No cardiovascular deaths, heart failure hospitalisations or symptomatic CTRCD occurred. Cardiac magnetic resonance-derived LVEF remained stable in both arms at 12 months (between-group difference -0.8% [-2.0 to +0.4], p=0.21).
CONCLUSIONS: Among breast cancer survivors with recovered anti-HER2 CTRCD, HFT withdrawal was not associated with symptomatic events or significant between-group difference in LVEF at 12-months.