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Cardiotoxicity — SCE Medical Oncology MCQ

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EasyBreast CancerCardiotoxicitySCE Medical Oncology

A 62-year-old woman completed adjuvant dose-dense AC-paclitaxel and trastuzumab for HER2-positive breast cancer. She develops heart failure symptoms 6 months after completing trastuzumab. LVEF is 35%. What is the typical reversibility of trastuzumab-related cardiac dysfunction compared with anthracycline-induced cardiomyopathy?

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Correct answer: BTrastuzumab cardiotoxicity is typically reversible with heart failure treatment and drug cessation

Trastuzumab-related cardiac dysfunction (Type II cardiotoxicity) is characterised by reversible myocardial dysfunction not associated with myocyte destruction. It typically improves with trastuzumab cessation and standard heart failure therapy (ACEi/ARB + beta-blocker). In contrast, anthracycline cardiotoxicity (Type I) involves irreversible myocyte damage and necrosis, with cumulative dose-dependent risk. Sequential use of anthracyclines then trastuzumab increases cardiac risk.

Reference: https://www.nice.org.uk/guidance/conditions-and-diseases/cancer