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Official Journal of the Italian Society of Angiology and Vascular Pathology
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Minerva Cardioangiologica 2016 Nov 25

lingua: Inglese

Left ventricular end-diastolic volume as an early indicator of Trastuzumab-related cardiotoxicity in patients with HER2 positive breast cancer: results from a single-center retrospective study

Corinna BERGAMINI 1, Flavia TORELLI 1, Luca GHISELLI 1, Andrea ROSSI 1, Laura TREVISANI 1, Giulia VINCO 1, Stella TRUONG 1, Giovanni BENFARI 1, Francesca LA RUSSA 2, Giorgio GOLIA 1, Annamaria MOLINO 2, Corrado VASSANELLI 1

1 UOC di Cardiologia, Dipartimento di Medicina, A.O.U.I. Verona, Verona, Italy; 2 UOC di Oncologia, A.O.U.I. Verona, Verona, Italy


BACKGROUND: Adjuvant Trastuzumab therapy increases survival rates in patients with early HER2 positive breast cancer, although it can be potentially cardiotoxic. Aim of the study was to evaluate the prevalence of left ventricular (LV) systolic dysfunction; and the relationship between the presence of cardiovascular risk factors, cardiac therapy and/or echocardiographic parameters of systolic function at baseline and the development of cardiotoxicity in such patients.
METHODS: 227 patients were retrospectively reviewed. Cardiotoxicity was defined as a decrease in LV ejection fraction (EF) below 50% or an absolute decrease of >10 points below the baseline value or any indication of heart failure. Each patient underwent echocardiography at baseline and at follow-up every three months.
RESULTS: Prevalence of cardiotoxicity was 17.6% (15.4% asymptomatic, 2.2% symptomatic). Patients developing LV dysfunction presented hypertension (p=0.041) and diabetes (p=0.01) and used cardiac therapy at baseline more frequently. Smoke habit, age>50 and use of angiotensin-converting enzyme (ACE)-inhibitors, were independent predictors of cardiac damage. Furthermore, patients with LV dysfunction showed baseline LV end-diastolic volume (EDV) higher than those who did not and baseline EDV (OR 1.02; 95% CI 1.00 to 1.04; p=0.027) independently predicted cardiotoxicity with 58 ml/mq as best cut-off point (AUC = 0.65, [95 % CI 0.55 to 0.75]).
CONCLUSIONS: Prevalence of Trastuzumab-related cardiotoxicity in patients with HER2-positive early breast cancer is relatively frequent, although asymptomatic in most cases. Baseline EDV resulted as independent predictor of cardiotoxicity suggesting that EDV may be more reliable than LVEF to identify patients at higher risk of developing cardiac damage.

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