‘Reassuring’ findings
In a comment, Andrea Natale, MD, executive medical director, Texas Cardiac Arrhythmia Institute at St. David’s Medical Center, Austin, said POCD is “very likely due to the vulnerable state of mind and the stress that the patients encounter while undergoing the cardiac procedure,” as well as postsurgical inflammation, which “can cause brief functional alterations in the brain, leading to temporary cognitive impairment.” Inadequate preprocedural anticoagulation may also play a role.
Dr. Natale, co-author of an accompanying editorial, said it’s “prudent” when evaluating cognitive function to use questionnaires that are “sensitive to mild cognitive impairment,” such as the Montreal Cognitive Assessment or the Mini-Mental State Examination.
Additionally, “post-ablation cognitive function should be assessed way after the blanking period to avoid any plausible impact of inflammation, medications, the feeling of being overwhelmed, and the stress of undergoing a cardiac procedure,” advised Dr. Natale, who was not involved with the study.
Also commenting, Matthew Hyman, MD, PhD, an electrophysiologist and assistant professor of medicine at the Hospital of the University of Pennsylvania, called it a “well-done and very reassuring study.”
Dr. Hyman, who was also not part of the research team, added that previous work has shown an association between AFib and dementia, “and it remains to be seen if patients with rhythm control over longer durations than the current studies have the best outcomes.”
The authors of the study are supported by the National Health and Medical Research Council research scholarship. One author of the study is supported by a practitioner fellowship from the National Health and Medical Research Council; has received research support from Biosense Webster, Boston Scientific, Abbott, and Medtronic; and has served on the advisory board of Boston Scientific and Biosense Webster. Dr. Natale is a consultant for Abbott, Baylis, Biosense Webster, Biotronik, Boston Scientific, and Medtronic. Dr. Hyman is a consultant/speaker for Abbott, Biosense Webster and Boston Scientific.
A version of this article first appeared on Medscape.com.