JACC. CardioOncology · 2025
Cardiac Safety of Reduced Cardiotoxicity Surveillance During HER2-Targeted Therapy.
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Yu Anthony F, Dang Chau T, Moskowitz Chaya S, Mishra Meza Akriti, DeFusco Patricia, Oligino Eric, Chen Carol L, Sanford Rachel, Drullinsky Pamela, Bromberg Jacqueline, Wong Serena, Modi Shanu, Jorgensen Justine, Oeffinger Kevin C, Steingart Richard M, Liu Jennifer E
Аннотация
BACKGROUND: Echocardiograms are recommended every 3 months to monitor for cancer therapy-related cardiac dysfunction (CTRCD) among patients treated with HER2-targeted therapy, despite increasing use of safer regimens associated with low CTRCD risk.
OBJECTIVES: This study evaluated the cardiac safety of reduced CTRCD surveillance performed every 6 months during non-anthracycline HER2-targeted treatment.
METHODS: This non-randomized clinical trial enrolled 190 patients with HER2-positive breast cancer treated with non-anthracycline HER2-targeted therapy. CTRCD surveillance by means of echocardiography was performed every 6 months. Key exclusion criteria were previous anthracycline exposure, significant cardiovascular disease, and uncontrolled hypertension. The primary outcome was the cardiac event rate, defined by heart failure or cardiovascular death at 1 year. Secondary outcomes included change in LVEF from baseline to 6 months and 1 year, incidence of asymptomatic CTRCD, incidence of HER2-targeted treatment interruption, and feasibility of reduced cardiac surveillance.
RESULTS: The median age was 52 years (Q1-Q3: 45-60 years); 174 (91.6%) had stage I-III disease, and all were treated with a trastuzumab-based regimen. Cardiovascular risk factors included hypertension (20.0%) and diabetes (4.2%), and the mean left ventricular ejection fraction at baseline was 63.6 ± SE 0.3%. There were 0 (0%; 1-sided 97.5% CI: 0%-1.9%) cardiac events with a median follow-up of 17.5 months (Q1-Q3: 16.3-18.9 months). One patient developed asymptomatic CTRCD (0.5%; 95% CI: 0.01%-2.9%) but resumed therapy after a temporary treatment interruption. Adherence to the reduced CTRCD surveillance schedule every 6 months was 73.2% (intention-to-treat) and 79.9% (per-protocol).
CONCLUSIONS: Reduced CTRCD surveillance every 6 months is safe and feasible for patients at low risk for CTRCD and may be an appropriate strategy to consider during non-anthracycline HER2-targeted treatment regimens.
OBJECTIVES: This study evaluated the cardiac safety of reduced CTRCD surveillance performed every 6 months during non-anthracycline HER2-targeted treatment.
METHODS: This non-randomized clinical trial enrolled 190 patients with HER2-positive breast cancer treated with non-anthracycline HER2-targeted therapy. CTRCD surveillance by means of echocardiography was performed every 6 months. Key exclusion criteria were previous anthracycline exposure, significant cardiovascular disease, and uncontrolled hypertension. The primary outcome was the cardiac event rate, defined by heart failure or cardiovascular death at 1 year. Secondary outcomes included change in LVEF from baseline to 6 months and 1 year, incidence of asymptomatic CTRCD, incidence of HER2-targeted treatment interruption, and feasibility of reduced cardiac surveillance.
RESULTS: The median age was 52 years (Q1-Q3: 45-60 years); 174 (91.6%) had stage I-III disease, and all were treated with a trastuzumab-based regimen. Cardiovascular risk factors included hypertension (20.0%) and diabetes (4.2%), and the mean left ventricular ejection fraction at baseline was 63.6 ± SE 0.3%. There were 0 (0%; 1-sided 97.5% CI: 0%-1.9%) cardiac events with a median follow-up of 17.5 months (Q1-Q3: 16.3-18.9 months). One patient developed asymptomatic CTRCD (0.5%; 95% CI: 0.01%-2.9%) but resumed therapy after a temporary treatment interruption. Adherence to the reduced CTRCD surveillance schedule every 6 months was 73.2% (intention-to-treat) and 79.9% (per-protocol).
CONCLUSIONS: Reduced CTRCD surveillance every 6 months is safe and feasible for patients at low risk for CTRCD and may be an appropriate strategy to consider during non-anthracycline HER2-targeted treatment regimens.