Cardiovascular toxic effects of targeted cancer therapy.

Over the past decade, there has been a major shift in chemotherapy from non-specific cytotoxic drugs to molecular targeted drug therapies. As more molecular targeted therapies are developed, new types of cardiovascular toxicities induced by targeted therapies are a growing problem. Cardiotoxicity induced by the human epidermal growth factor receptor-2 inhibitor trastuzumab manifests as decreased left ventricular ejection fraction. In contrast to anthracycline treatment, most cardiac events occur during trastuzumab treatment, but are reversed quickly when treatment is interrupted and cardiac intervention is established. Vascular endothelial growth factor pathway inhibitors decrease vascular tone, leading to hypertension. After drug initiation, the early detection and aggressive pharmacological management of hypertension are necessary to avoid severe complications. Cardiovascular safety is an emerging challenge in patients treated with newer generations of BCR-ABL inhibitors. Although rare, dasatinib-induced pulmonary hypertension is potentially fatal. Vascular events including cardiac and cerebral ischemic events and peripheral arterial occlusive disease have emerged as a new type of toxicity in patients treated with ponatinib and nilotinib. Thus, a wide variety of cardiovascular toxicities have been observed in patients treated with targeted drugs and have become a critically important topic of discussion for the practicing oncologist and cardiologists. Awareness of the potential side effects, recognition of signs and symptoms, and the establishment of therapeutic strategies are all crucial to providing quality patient care.