Cardiac autonomic dysfunction is associated with white matter lesions in patients with mild cognitive impairment
ABSTRACT Cardiac autonomic dysfunction has been associated with cognitive impairment, but the underlying pathogenesis is complex and cerebral white matter lesions (WMLs) might be implicated.
Time and frequency heart rate variability (HRV) and visual rating of WMLs were carried out in 42 patients with mild cognitive impairment.
After adjustment for relevant demographic and clinical characteristics, including left ventricular mass, reduced HRV indices of parasympathetic (root mean square of successive difference of RR intervals, RMSSD) and sympathetic modulation (low-frequency [LF] power) were associated with increased WML score (RMSSD: B -0.30, 95% CI -0.52 to -0.08, p = .01; LF: B -0.24, 95% CI -0.46 to -0.02, p = .05). In a multiple-adjusted model, RMSSD was the major independent predictor of WMLs (B -0.35, 95% CI -0.57 to -0.13, p = .002).
The evidence for an independent association of cardiac autonomic dysfunction with WMLs might suggest its role in the pathogenesis of WMLs.
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ABSTRACT: Sharif, Asif Hasa, "Fractal fluctuations in the cardiovascular dynamical system : from the autonomic control to the central nervous system influence" (2010). Theses and dissertations. Paper 749.
Article: Heart rate variability[Show abstract] [Hide abstract]
ABSTRACT: Reduced heart rate variability carries an adverse prognosis in patients who have survived an acute myocardial infarction. This article reviews the physiology, technical problems of assessment, and clinical relevance of heart rate variability. The sympathovagal influence and the clinical assessment of heart rate variability are discussed. Methods measuring heart rate variability are classified into four groups, and the advantages and disadvantages of each group are described. Concentration is on risk stratification of postmyocardial infarction patients. The evidence suggests that heart rate variability is the single most important predictor of those patients who are at high risk of sudden death or serious ventricular arrhythmias.Clinical Cardiology 08/1990; 13(8):570 - 576. DOI:10.1002/clc.4960130811 · 2.23 Impact Factor
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ABSTRACT: Measures of heart rate variability (HRV) are major indices of the sympathovagal balance in cardiovascular research. These measures are thought to reflect complex patterns of brain activation as well and HRV is now emerging as a descriptor thought to provide information on the nervous system organization of homeostatic responses in accordance with the situational requirements. Current models of integration equate HRV to the affective states as parallel outputs of the central autonomic network, with HRV reflecting its organization of affective, physiological, “cognitive,” and behavioral elements into a homeostatic response. Clinical application is in the study of patients with psychiatric disorders, traumatic brain injury, impaired emotion-specific processing, personality, and communication disorders. HRV responses to highly emotional sensory inputs have been identified in subjects in vegetative state and in healthy or brain injured subjects processing complex sensory stimuli. In this respect, HRV measurements can provide additional information on the brain functional setup in the severely brain damaged and would provide researchers with a suitable approach in the absence of conscious behavior or whenever complex experimental conditions and data collection are impracticable, as it is the case, for example, in intensive care units. (PsycINFO Database Record (c) 2012 APA, all rights reserved)Journal of Psychophysiology 01/2012; 26(4):178. DOI:10.1027/0269-8803/a000080 · 1.43 Impact Factor