Neurologic Dysfunction and Neuroprotection in Transcatheter Aortic Valve Implantation

Area of Science:

• Cardiology
• Neurology
• Anesthesiology

Background:

• Transcatheter aortic valve implantation (TAVI) is increasingly common, even in low-risk patients, with excellent outcomes.
• Neurologic complications, including stroke, silent brain infarcts, and cognitive dysfunction, are significant concerns after TAVI.
• Particulate emboli released during TAVI are the suspected cause of these neurologic events.

Purpose of the Study:

• To review the current evidence on neurologic complications following TAVI.
• To evaluate the effectiveness of cerebral embolic protection devices (CEPDs) in preventing stroke and other neurologic issues.
• To discuss the role of anesthetic techniques in TAVI-related neurologic outcomes.

Main Methods:

• Review of randomized clinical trials and existing literature on TAVI, CEPDs, and anesthetic management.
• Analysis of data regarding stroke, silent brain infarcts, postoperative delirium, and cognitive dysfunction.
• Assessment of the impact of different anesthetic approaches (monitored anesthesia care vs. general anesthesia) on neurologic outcomes.

Main Results:

• Randomized trials have not shown a significant reduction in stroke rates with the use of CEPDs.
• The impact of CEPDs on silent brain infarcts, postoperative delirium, and cognitive dysfunction remains uncertain.
• Monitored anesthesia care and conscious sedation appear as safe as general anesthesia, with no proven benefit in reducing neurologic complications.

Conclusions:

• Cerebral embolic protection devices have not yet demonstrated efficacy in reducing stroke or other neurologic complications after TAVI.
• Further large-scale randomized trials are necessary to investigate the relationship between perioperative interventions and neurologic outcomes in TAVI patients.
• Anesthesiologists play a crucial role in managing neurologic events during the perioperative period of TAVI.