scholarly journals Sympathetic nervous system and cardiovascular risk in mitral valve prolapse

2019 ◽  
Vol 19 (2) ◽  
pp. 51-57 ◽  
Author(s):  
L Bona Olexova ◽  
M Mestanik ◽  
A Jurko ◽  
N Sekaninova ◽  
M Slavikova ◽  
...  
Keyword(s):  
Nervous System ◽  
Cardiovascular Risk ◽  
Mitral Valve ◽  
Sympathetic Nervous System ◽  
Mitral Valve Prolapse ◽  
Sympathetic Activity ◽  
Electrodermal Activity ◽  
Regulatory State ◽  
Autonomic Nervous ◽  
Sympathetic Nervous

Abstract Mitral valve prolapse (MVP) represents a frequent cardiovascular condition associated with increased cardiovascular risk, which may have progressive course and become malignant. Dysregulation of autonomic nervous system - especially sympathetic overdrive – is one of the factors considered to play a key role in its aetiology and development. There is a growing evidence of a large impact of sympathetic system on the development of MVP. Exaggerated sympathetic activity may lead to morphologic changes in valves tissue such as thickening and redundancy. Nowadays, few investigative methods are known for evaluation of the regulatory state of sympathetic nervous system, which could be, theoretically, used to identify the subjects with sympathetic overactivity associated with an increased cardiovascular risk. Electrodermal activity or blood pressure variability represent promising non-invasive methods for evaluation of the regulatory outputs of sympathetic nervous system. There is a possibility to extend a set of investigative methods in MVP and include the monitoring of sympathetic activity in the assessment of cardiovascular risk. This article summarizes knowledge about pathogenesis, diagnostic and therapeutical approaches of MVP, and brings some novel insights on the parameters of autonomic nervous regulation, which haven’t yet been used in cardiovascular risk assessment in MVP.

A developmental increase in allostatic load from ages 3 to 11 years is associated with increased schizotypal personality at age 23 years

2011 ◽  
Vol 23 (4) ◽  
pp. 1059-1068 ◽  
Author(s):  
Melissa Peskin ◽  
Adrian Raine ◽  
Yu Gao ◽  
Peter H. Venables ◽  
Sarnoff A. Mednick
Keyword(s):  
Nervous System ◽  
Sympathetic Nervous System ◽  
Anxiety Disorders ◽  
Allostatic Load ◽  
Developmental Change ◽  
Electrodermal Activity ◽  
Positive Symptom ◽  
Developmental Abnormality ◽  
Schizotypal Personality ◽  
Sympathetic Nervous

AbstractAlthough allostatic load has been investigated in mood and anxiety disorders, no prior study has investigated developmental change in allostatic load as a precursor to schizotypal personality. This study employed a multilevel developmental framework to examine whether the development of increased allostatic load, as indicated by impaired sympathetic nervous system habituation from ages 3 to 11 years, predisposes to schizotypal personality at age 23 years. Electrodermal activity to six aversive tones was recorded in 995 subjects at age 3 years and again at 11 years. Habituation slopes at both ages were used to create groups who showed a developmental increase in habituation (decreased allostatic load), and those who showed a developmental decrease in habituation (increased allostatic load). Children who showed a developmental increase in allostatic load from ages 3 to 11 years had higher levels of schizotypal personality at 23 years. A breakdown of total schizotypy scores demonstrated specificity of findings to cognitive–perceptual features of schizotypy. Findings are the first to document a developmental abnormality in allostasis in relation to adult schizotypal personality. The relative failure to develop normal habituation to repeated stressors throughout childhood is hypothesized to result in an accumulation of allostatic load and consequently increased positive symptom schizotypy in adulthood.

scholarly journals The state of response of autonomic nervous system in children with mitral valve prolapse

2021 ◽  
Vol 26 (4) ◽  
pp. 74-80
Author(s):  
І.О.  Mitiuriaeva-Korniyko ◽  
O.V. Kuleshov ◽  
Ya.A. Medrazhevska ◽  
L.O. Fik ◽  
T.D. Klets
Keyword(s):  
Heart Rate ◽  
Nervous System ◽  
Autonomic Nervous System ◽  
Mitral Valve ◽  
Frequency Domain ◽  
Mitral Valve Prolapse ◽  
Low Frequency ◽  
Very Low Frequency ◽  
Autonomic Nervous ◽  
Significant Difference

The article presents summarized materials on connective tissue dysplasia of the heart, primary mitral valve prolapse, dysfunction of the autonomic system. Aim of research: to estimate the condition of autonomic nervous system in children with primary mitral valve prolapse. We examined 106 children with mitral valve prolapse aged from 13 to 17 years old on the clinical base of city hospital “Center of mother and child” in Vinnitsya. Research included time and frequency domain (evaluation with cardiointervalography. Final results were compared with the control group records. The results showed no statistical significance among time domain parameters in the main group of children. All these indices displayed tendency to sympathetic and parasympathetic autonomic nervous system tonus increase in boys. However, sympathicotonia tendency was noted in girls only. Frequency domain parameters showed similar results, compared with the previous. Nevertheless, very low frequency parameters had statistically significant difference in both subgroups of patience with mitral valve prolapse, including males (3205.8±190.9 against 1717±154, р<0.05) and females (3280±220.1 against 1433±811, р<0.05). There were no statistically significant difference among other frequency domain parameters. Conclusions: we estimated that children with mitral valve prolapse have imbalanced autonomic homeostasis manifested by tone disturbances of both autonomic vegetative system branches with sympathetic predominance. Patients with primary mitral valve prolapse generally have increased sympathetic tone - both boys and girls - according to spectral analysis of heart rate variability indices, heart rate oscillation power of a very low frequency in particular (p<0.05). In children with mitral valve prolapse, the tone of parasympathetic nervous system is generally normal; there is a tendency to its increase in boys and decrease in girls. These children should be under close medical supervision by pediatricians and cardiologists.

scholarly journals Cardiovascular Risk in Chronic Kidney Disease: Role of the Sympathetic Nervous System

2012 ◽  
Vol 2012 ◽  
pp. 1-8 ◽  
Author(s):  
Jeanie Park
Keyword(s):  
Cardiovascular Disease ◽  
Chronic Kidney Disease ◽  
Renal Failure ◽  
Nervous System ◽  
Cardiovascular Risk ◽  
Kidney Disease ◽  
Sympathetic Nervous System ◽  
Renal Disease ◽  
Left Ventricular ◽  
Sympathetic Nervous

Patients with chronic kidney disease are at significantly increased risk for cardiovascular disease and sudden cardiac death. One mechanism underlying increased cardiovascular risk in patients with renal failure includes overactivation of the sympathetic nervous system (SNS). Multiple human and animal studies have shown that central sympathetic outflow is chronically elevated in patients with both end-stage renal disease (ESRD) and chronic kidney disease (CKD). SNS overactivation, in turn, increases the risk of cardiovascular disease and sudden death by increasing arterial blood pressure, arrythmogenicity, left ventricular hypertrophy, and coronary vasoconstriction and contributes to the progression renal disease. This paper will examine the evidence for SNS overactivation in renal failure from both human and experimental studies and discuss mechanisms of SNS overactivity in CKD and therapeutic implications.

Sympathetic Blocks

2021 ◽  
Author(s):  
Christopher J. Gilligan ◽  
Shafik Boyaji
Keyword(s):  
Nervous System ◽  
Autonomic Nervous System ◽  
Sympathetic Nervous System ◽  
Stellate Ganglion ◽  
Phantom Pain ◽  
Celiac Plexus Block ◽  
Autonomic Nervous ◽  
Sympathetic Nervous ◽  
Plexus Block ◽  
Sympathetic Blocks

The autonomic nervous system (ANS) is the part of the nervous system that regulates involuntary functions. It is composed of the sympathetic and the parasympathetic nervous systems (SNS and PNS, respectively). The sympathetic nervous system, in addition to its vital role as part of the autonomic nervous system and the emergency response, is thought to be involved in numerous pathologic, painful conditions. These conditions are referred to as Sympathetically Mediated Pain (SMP). SMP is often considered a result of a vicious circle of events, which include changes in peripheral and central somatosensory processes. This assumption is based upon the observations that the pain is spatially correlated with signs of autonomic dysfunction, blocking the efferent sympathetic supply to the affected area would relieve the pain. Sympathetic blocks emerged as a way to help diagnose and treat several painful conditions, including complex regional pain syndrome (CRPS), phantom pain, neuralgias, herpes zoster, and even fibromyalgia. Additionally, sympathetic blockades have been used to improve perfusion, treat angina and malignant arrhythmias, and posttraumatic stress disorder (PTSD) symptoms. This review contains 1 table and 68 references. Key words: Sympathetic nervous system, sympathetically mediated pain, sympathetic blocks, neuropathic pain, chronic pain, stellate ganglion block, celiac plexus block, lumbar sympathetic block, superior hypogastric plexus block

Evaluation of the Autonomic Nervous System of the Heart in Male Patients with Mitral Valve Prolapse Syndrome Using Respiratory Sinus Arrhythmia and Dynamic Exercise

Cardiology ◽  
1989 ◽  
Vol 76 (6) ◽  
pp. 433-441 ◽  
Author(s):  
Louren&ccedil;o Gallo, Jr. ◽  
Jos&eacute; Morelo-Filho ◽  
Benedito C. Maciel ◽  
Jos&eacute; A. Marin-Neto ◽  
Luiz E.B. Martins ◽  
...  
Keyword(s):  
Nervous System ◽  
Autonomic Nervous System ◽  
Mitral Valve ◽  
Respiratory Sinus Arrhythmia ◽  
Mitral Valve Prolapse ◽  
Dynamic Exercise ◽  
Sinus Arrhythmia ◽  
Autonomic Nervous ◽  
Male Patients

scholarly journals 3244 The Autonomic Nervous System as a Potential Therapeutic Target in Huntington Disease

2019 ◽  
Vol 3 (s1) ◽  
pp. 55-55
Author(s):  
Jordan L Schultz ◽  
Lyndsay Harshman ◽  
John Kamholz ◽  
Peggy Nopoulos
Keyword(s):  
Nervous System ◽  
Autonomic Nervous System ◽  
Sympathetic Nervous System ◽  
Huntington Disease ◽  
Cox Regression ◽  
Beta Blockers ◽  
Healthy Controls ◽  
Data Set ◽  
Autonomic Nervous ◽  
Sympathetic Nervous

OBJECTIVES/SPECIFIC AIMS: This study (1) investigated the presence and severity of autonomic nervous system (ANS) dysfunction in patients with pre-symptomatic Huntington Disease (HD) and (2) determined if pharmacologic manipulation of the ANS could modify the progression of HD. METHODS/STUDY POPULATION: Using a unique data set of children at-risk for HD (the Kids-HD study), markers of autonomic function (resting heart rate [rHR], blood pressure [BP], and core body temperature [CBT]) were compared between pre-symptomatic, gene-expanded children (psGE) and healthy developing children using mixed models analyses controlling for sex, age, and body mass index. Included participants had to be < 18 years old and be at least 10 years from their predicted motor diagnosis of HD. Using the Enroll-HD database, inverse-propensity score weighted, Cox Regression analyses investigated the effects of beta-blockers on the timing of motor diagnosis of presymptomatic, adult patients with HD. RESULTS/ANTICIPATED RESULTS: Compared to healthy controls, the psGE participants had significantly (p<0.05) higher mean rHR, systolic BP percentile, and CBT compared to the healthy controls (elevated by 4.01 bpm 0.19°C, and 5.96 percentile points, respectively, in the psGE group). Participants from Enroll-HD who were using a beta-blocker prior to motor diagnosis (n=65) demonstrated a significantly lower annualized risk of motor diagnosis [HR=0.56, p=0.03], compared to other participants with HD (n=1972). DISCUSSION/SIGNIFICANCE OF IMPACT: Sympathetic nervous system activity is elevated in patients with HD decades prior to their predicted motor diagnosis. Furthermore, modulation of the sympathetic nervous system with beta-blockers significantly lowers the annualized risk of motor diagnosis of HD.

Sympathetic nervous system contributes to the age-related impairment of flow-mediated dilation of the superficial femoral artery

2006 ◽  
Vol 291 (6) ◽  
pp. H3122-H3129 ◽  
Author(s):  
Dick H. J. Thijssen ◽  
Patricia de Groot ◽  
Miriam Kooijman ◽  
Paul Smits ◽  
Maria T. E. Hopman
Keyword(s):  
Nervous System ◽  
Sympathetic Nervous System ◽  
Femoral Artery ◽  
Superficial Femoral Artery ◽  
Sympathetic Activity ◽  
Cold Pressor Test ◽  
Young Men ◽  
Older Men ◽  
Flow Mediated Dilation ◽  
Sympathetic Nervous

The physiological aging process is associated with endothelial dysfunction, as assessed by flow-mediated dilation (FMD). Aging is also characterized by increased sympathetic tone. Therefore, the aim of the present study is to assess whether acute changes in sympathetic activity alter FMD in the leg. For this purpose, the FMD of the superficial femoral artery was determined in 10 healthy young (22 ± 1 yr) and 8 healthy older (69 ± 1 yr) men in three different conditions: 1) at baseline, 2) during reduction of sympathetic activity, and 3) during sympathetic stimulation. Reduction of sympathetic activity was achieved by performing a maximal cycling exercise, leading to postexercise attenuation of the sympathetic responsiveness in the exercised limb. A cold pressor test was used to increase sympathetic activity. Nitroglycerin (NTG) was used to assess endothelium-independent vasodilation in all three conditions. Our results showed that, in older men, the FMD and NTG responses were significantly lower compared with young men ( P = 0.001 and P = 0.02, respectively). In older men, sympathetic activity significantly affected the FMD response [repeated-measures (RM) ANOVA: P = 0.01], with a negative correlation between the level of sympathetic activity and FMD ( R = −0.41, P = 0.049). This was not the case for NTG responses (ANOVA; P = 0.48). FMD and NTG responses in young men did not differ among the three conditions (RM-ANOVA: P = 0.32 and P = 0.31, respectively). In conclusion, in older men, FMD of the femoral artery is impaired. Local attenuation of the sympathetic responsiveness partly restores the FMD in these subjects. In contrast, in young subjects, acute modulation of the sympathetic nervous system activity does not alter flow-mediated vasodilation in the leg.

Peripheral Nervous SystemAutonomic Nervous System

2013 ◽  
Author(s):  
Adam Fisch
Keyword(s):  
Nervous System ◽  
Autonomic Nervous System ◽  
Sympathetic Nervous System ◽  
Peripheral Nervous System ◽  
Parasympathetic Nervous System ◽  
Urinary System ◽  
Autonomic Nervous ◽  
System P ◽  
Sympathetic Nervous

Chapter 6 discusses how to draw the peripheral nervous system, specifically the autonomic nervous system, including autonomic fiber arrangements, the parasympathetic nervous system, the sympathetic nervous system, the urinary system, and the cardiac reflex.

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