Cardiovascular Adverse Events in Patients With Cancer Treated With Bevacizumab: A Meta‐Analysis of More Than 20 000 Patients

BACKGROUND The monoclonal antibody bevacizumab effectively inhibits angiogenesis in several types of cancers by blocking vascular endothelial growth factor. However, life-threatening cardiovascular adverse effects could limit its use and may warrant specific follow-up strategies. METHODS AND RESULTS We systematically searched MEDLINE, Cochrane, EMBASE, and Web of Science for randomized controlled trials published until November 2016 that assessed patients with cancer treated with or without bevacizumab in addition to standard chemotherapy. A total of 20 050 patients with a broad range of cancer types from 22 studies were included in this analysis (10 394 in the bevacizumab group and 9656 in the control group). The risks of arterial and venous adverse events were higher in the bevacizumab groups (relative risk [RR], 1.37; 95% CI, 1.10-1.70 [P=0.004] and RR, 1.29; 95% CI, 1.12-1.47 [P<0.001], respectively), and more arterial adverse events occurred in patients taking high-dose bevacizumab regimens. Bevacizumab treatment was associated with the highest risk of cardiac and cerebral ischemia in the high-dose bevacizumab groups (RR, 4.4; 95% CI, 1.59-12.70 [P=0.004] and RR, 6.67; 95% CI, 2.17-20.66 [P=0.001], respectively). In addition, the risk of bleeding and arterial hypertension were higher in the bevacizumab groups (RR, 2.74; 95% CI, 2.38-3.15 [P<0.001] and RR, 4.73; 95% CI, 4.15-5.39 [P<0.00001], respectively), with higher values for patiens taking high-dose regimens. CONCLUSIONS Treatment with bevacizumab increases the risk of arterial adverse events, particularly cardiac and cerebral ischemia, venous adverse events, bleeding, and arterial hypertension. This risk is additionally increased with high doses of bevacizumab. Further studies should determine the appropriate options for cardio-oncology management. CLINICAL TRIAL REGISTRATION URL: https://www.crd.york.ac.uk. Unique identifier: PROSPERO(CRD42016054305).