[New tyrosine kinase and EGFR inhibitors in cancer therapy. Cardiac and skin toxicity as relevant side effects. Part A: heart].

Cardiotoxicity is a serious side effect of targeted molecular therapies in cancer treatment. Monoclonal antibodies and tyrosine kinase inhibitors are known to be potent therapies in various neoplastic diseases due to inhibition of specific signal transduction pathways. Although targeted therapies are considered to be less toxic and better tolerated than common chemotherapies certain cardiac side effects have been observed. Cardiac toxicity may range from asymptomatic reduction of left ventricular function to life-threatening events like heart failure and acute coronary syndrome. Further side effects are arterial hypertension, thrombosis and arrhythmias. Cardiovascular side effects are common for anti-HER2 therapy in combination with anthracyclines and for inhibitors of angiogenesis. In these patients careful cardiac monitoring is warranted. Because of missing randomized long-term follow-ups, information about cardiac side effects is limited in newly developed targeted molecular therapies. In case of cardiac side effects or preexisting cardiac disease before therapy initiation, assessments by a cardiologist throughout the course of treatment are important. For patients with severe cardiac side effects, discontinuation of treatment is warranted; in case of asymptomatic cardiac side effects symptom-specific therapy should be performed.