RESUMO
AIMS: Left ventricular ejection fraction is used to monitor patients undergoing cardiotoxic chemotherapy. A decrease in left ventricular ejection fraction represents a relatively late stage of systolic involvement. Global longitudinal strain has been studied to detect early changes in left ventricular myocardial contractile function. The aim of the present study was to evaluate the global longitudinal strain measurement in the early detection of cardiotoxicity induced by cardiotoxic chemotherapeutic agents. MATERIALS AND METHODS: A study search strategy based on Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) was carried out to report systematic reviews. A search on PubMed, EMBASE, Web of Science and SCOPUS was carried out using the following keywords: 'echocardiography' and 'cardiotoxicity' and their variations, without language or date restrictions (until March 2021). RESULTS: In total, 4873 articles were identified for title and abstract analysis. The systematic review included 10 studies comprising 661 patients with cancer, including mainly breast cancer and haematological malignancies, mainly treated with anthracyclines. The meta-analysis included four studies: patients with cardiotoxicity showed a reduction in strain, compared with baseline, 14.13% greater than patients without cardiotoxicity (95% confidence interval 5.07-23.19; P < 0.01). No heterogeneity was observed between studies (I2 = 0). CONCLUSION: The meta-analysis showed that strain is a tool with proper predictive capacity for the detection of cardiotoxicity.
