Relationships Among Cognitive Function and Cerebral Blood Flow, Oxidative Stress, and Inflammation in Older Heart Failure Patients

Christina Kure, Franklin Rosenfeldt, Andrew Scholey, Andrew Pipingas, David Kaye, Peter Bergin, Kevin Croft, Keith Wesnes, Stephen Myers, Con Stough

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

Background:The mechanisms for cognitive impairment in heart failure (HF) are unclear. We investigated the relative contributions of cerebral blood flow velocity (BFV), oxidative stress, and inflammation to HF-associated cognitive impairment.Methods and Results:Thirty-six HF patients (≥60 years) and 40 healthy controls (68 ± 7 vs 67 ± 5 years, P > .05; 69% vs 50% male, P > .05) completed the Cognitive Drug Research computerized assessment battery and Stroop tasks. Common carotid (CCA) and middle cerebral arterial BFV were obtained by transcranial Doppler. Blood samples were collected for oxidant (diacron-reactive oxygen metabolites; F2-isoprostanes), antioxidant (coenzyme Q10; CoQ10), and inflammatory markers (high-sensitivity C-reactive protein). Compared with controls, patients exhibited impaired attention (Cognitive Drug Research's Power of Attention domain, congruent Stroop) and executive function (incongruent Stroop). Multiple regression modeling showed that CCA-BFV and CoQ10 but not group predicted performance on attention and executive function. Additionally, in HF patients, CCA-BFV and CoQ10 (β = −0.34 vs β = −0.35) were significant predictors of attention, and CCA-BFV (β = −0.34) was a predictor of executive function.Conclusions:Power of Attention and executive function is impaired in older HF patients, and reduced CCA-BFV and CoQ10 are associated with worse cognition. Interventions addressing these mechanisms may improve cognition in older HF patients.
Original languageEnglish
Pages (from-to)548-559
JournalJournal of Cardiac Failure
Volume22
Issue number7
Early online date18 Mar 2016
DOIs
Publication statusPublished - 1 Jul 2016

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