Predicting post-LVAD outcome: Is there a role for cognition?

Area of Science:

• Cardiology
• Neurology
• Medical Devices

Background:

• Cognition impacts stroke and death risk in various patient groups.
• This association is unexplored in heart failure (HF) patients receiving left ventricular assist device (LVAD) therapy.
• Pre-implant cognitive function may predict post-LVAD stroke and mortality.

Purpose of the Study:

• To investigate the relationship between pre-operative cognitive function and post-operative stroke and death in LVAD recipients.
• To determine if cognitive test scores predict adverse outcomes after LVAD implantation.

Main Methods:

• Retrospective analysis of 59 HF patients with pre-LVAD cognitive assessments.
• Cognitive function measured across attention, memory, language, and visual-motor speed, averaged into a single z-score.
• Survival analyses (900-day follow-up, censored for transplant) evaluated stroke and death predictors.

Main Results:

• Lower average cognitive z-scores significantly predicted increased risk of post-LVAD stroke (HR=0.513, p=0.012) and death (HR=0.166, p=0.001).
• Patients experiencing stroke or death had worse pre-operative cognitive performance.
• Cognitive z-score was the sole significant predictor of stroke and death when included in the model.

Conclusions:

• Pre-operative cognitive performance is a significant predictor of post-LVAD stroke and mortality.
• Findings align with studies in non-LVAD populations, suggesting potential early neurologic vulnerability.
• Further research is needed to optimize patient selection, management, and advanced care planning based on cognitive status.