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The purpose of this study was to evaluate whether dysfunction of specific cognitive abilities is a predictor of impending mortality in adults with systolic heart failure (HF).
A total of 166 stable outpatients with HF completed cognitive function evaluation in language, working memory, memory, visuospatial ability, psychomotor speed, and executive function using a neuropsychological test battery. Demographic and clinical variables, comorbidity, depressive symptoms, and health-related quality of life were also measured. Patients were followed for 12 months to determine all-cause mortality.
There were 145 survivors and 21 deaths. In logistic regression analyses, significant predictors of mortality were lower left ventricular ejection fraction (LVEF) and poorer scores on measures of global congnitive function Mini-Mental State Examination [MMSE], working memory, memory, psychomotor speed, and executive function. Memory loss was the most predictive cognitive function variable (overall chi(2) = 17.97, df = 2, P < .001; Nagelkerke R(2) = 0.20). Gender was a significant covariate in 2 models, with men more likely to die. Age, comorbidity, depressive symptoms, and health-related quality of life were not significant predictors. In further analyses, significant predictors of mortality were lower systolic blood pressure and poorer global cognitive function, working memory, memory, psychomotor speed, and executive function, with memory being the most predictive.
As hypothesized, lower LVEF and memory dysfunction predicted mortality. Poorer global cognitive score as determined by the MMSE, working memory, psychomotor speed, and executive function were also significant predictors. LVEF or systolic blood pressure had similar predictive values. Interventions are urgently needed to prevent and manage memory loss in HF.
University of Michigan School of Nursing, Ann Arbor, MI.
This article was published in the following journal.
Name: Journal of cardiac failure
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