Giovannelli F, Simoni D, Gavazzi G, Giganti F, Olivotto I, Cincotta M, Pratesi A, Baldasseroni S, Viggiano MP. Electrophysiological correlates of word recognition memory process in patients with ischemic left ventricular dysfunction.
Clin Neurophysiol 2016;
127:3007-3013. [PMID:
27469528 DOI:
10.1016/j.clinph.2016.06.022]
[Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2015] [Revised: 06/22/2016] [Accepted: 06/23/2016] [Indexed: 11/30/2022]
Abstract
OBJECTIVE
The relationship between left ventricular ejection fraction (LVEF) and cognitive performance in patients with coronary artery disease without overt heart failure is still under debate. In this study we combine behavioral measures and event-related potentials (ERPs) to verify whether electrophysiological correlates of recognition memory (old/new effect) are modulated differently as a function of LVEF.
METHODS
Twenty-three male patients (12 without [LVEF>55%] and 11 with [LVEF<40%] left ventricular dysfunction), and a Mini Mental State Examination score >25 were enrolled. ERPs were recorded while participants performed an old/new visual word recognition task.
RESULTS
A late positive ERP component between 350 and 550ms was differentially modulated in the two groups: a clear old/new effect (enhanced mean amplitude for old respect to new items) was observed in patients without LVEF dysfunction; whereas patients with overt LVEF dysfunction did not show such effect. In contrast, no significant differences emerged for behavioral performance and neuropsychological evaluations.
CONCLUSIONS
These data suggest that ERPs may reveal functional brain abnormalities that are not observed at behavioral level.
SIGNIFICANCE
Detecting sub-clinical measures of cognitive decline may contribute to set appropriate treatments and to monitor asymptomatic or mildly symptomatic patients with LVEF dysfunction.
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