Infrastructure needed
While the findings are promising, more data are needed to strengthen the argument for revising current IVT guidelines, said Ho-Yan Yvonne Chun, PhD, honorary senior clinical lecturer with the Centre for Clinical Brain Sciences at the University of Edinburgh and a consultant in stroke medicine for NHS Lothian and Borders General Hospital, who commented on the findings.
“The study sample are a highly selected group of patients from selected centers that have the infrastructure to offer DOAC level checking and DOAC reversal,” Dr. Chun said. “The selected centers are not representative of the majority of hospitals that offer IVT to stroke patients with acute stroke.”
Most hospitals lack the equipment necessary to test DOAC levels and don’t have immediate access to DOAC reversal agents, Dr. Chun said. In those centers, she added, the administration of IVT could be delayed, which might affect clinical outcomes.
“Infrastructure needs to be in place to ensure timely delivery of IVT to these patients,” Dr. Chun added. “This means that in real-world practice, hospitals need to have right logistical pathway in place in order to provide timely DOAC level checking and DOAC reversal agents.”
Dr. Chun added that “large pragmatic clinical trials, preferably multicentered, are needed to provide the definitive evidence on the safety and effectiveness of using these approaches to select patients with prior DOAC use for IVT.”
But such a study may not be feasible, Dr. Purrucker said. Among the hurdles he noted are the large sample size needed for such a trial, uncertainty regarding funding, and patient selection bias, resulting from the fact that such studies would likely exclude patients eligible for mechanical thrombectomy or those eligible for reversal treatment.
In light of earlier studies, including preclinical data that support the safety of DOACs in IVT, and these new data, Dr. Purrucker said he hopes a change in guidelines might be taken up in the future.
“But it should be good academic practice to first let the results be externally evaluated, for example, during the manuscript submission process,” he said. “But once published, guideline working groups will have to evaluate the recent and new evidence and might reconsider previous recommendations.”
The study received no commercial funding. Dr. Purrucker and Dr. Chun reported no relevant financial relationships.
A version of this article first appeared on Medscape.com.