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 Table of Contents    
BRIEF RESEARCH COMMUNICATION  
Year : 2012  |  Volume : 54  |  Issue : 3  |  Page : 253-256
Alcohol dependence syndrome: Postural challenge on heart rate variability


1 Human Physiological Laboratory, St. John's Research Institute, St. John's National Academy of Health Sciences; Department of Physiology, St. John's Medical College, Bangalore, Karnataka, India
2 Department of Psychiatry, St. John's Medical College and Hospital, Bangalore, Karnataka, India
3 Human Physiological Laboratory, St. John's Research Institute, St. John's National Academy of Health Sciences; Department of Psychiatry, St. John's Medical College and Hospital, Bangalore, Karnataka, India

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Date of Web Publication15-Oct-2012
 

   Abstract 

Background: Cardiac autonomic involvement in Alcohol-Dependence Syndrome (ADS) patients has been demonstrated using conventional autonomic tests. Resting heart rate variability (HRV) without normalization has also been reported.
Aims: To evaluate cardiac autonomic changes with postural challenge using HRV in ADS and controls while controlling for confounding factors.
Settings and Design: Cross-sectional study involving 27 male subjects with ADS and age-matched healthy controls.
Materials and Methods: Clinical assessments included Schedules for Clinical Assessment in Neuropsychiatry and Severity of Alcohol Dependence Questionnaire. Spectral measures of HRV while lying and with active standing were assessed.
Results: There was an attenuated response in delta high-frequency (P=0.06) and delta low-frequency (P=0.04) power to standing in ADS subjects compared with controls.
Conclusion: Patients with ADS appear to have attenuated cardiac vagal and sympathetic responses to standing. HRV with postural challenge may help earlier recognition of autonomic dysfunction in ADS.

Keywords: Alcohol-dependence syndrome, cardiac sympathetic and parasympathetic dysfunctions, heart rate variability, postural challenge

How to cite this article:
Sucharita S, Pradeep J, Vincent A, Vaz M, Srinivasan K. Alcohol dependence syndrome: Postural challenge on heart rate variability. Indian J Psychiatry 2012;54:253-6

How to cite this URL:
Sucharita S, Pradeep J, Vincent A, Vaz M, Srinivasan K. Alcohol dependence syndrome: Postural challenge on heart rate variability. Indian J Psychiatry [serial online] 2012 [cited 2019 Sep 16];54:253-6. Available from: http://www.indianjpsychiatry.org/text.asp?2012/54/3/253/102426



   Introduction Top


It has been estimated that about 62.5 million in India consume alcohol and that there has been a significant increase in the per capita consumption of alcohol in recent times. [1] The lifetime risk of developing alcohol dependence in men is around 10%, and this constitutes a significant public health problem. [2] Autonomic nervous system dysfunction affecting sudomotor, vasomotor and cardiac function has been described in alcohol dependence, but has been less clearly evaluated than in other conditions such as diabetes. [3] Recent studies using conventional autonomic tests have indicated that cardiac autonomic neuropathy in patients with Alcohol-Dependence Syndrome (ADS) may show reversal with strict abstinence. [4]

Many factors associated with ADS are known to impact measures of autonomic function. These include co-morbid psychiatric conditions such as depression and anxiety, liver disease, duration of ADS, concurrent psychotropic medications including medications used to treat alcohol withdrawal states, patient's nutritional status and presence of peripheral neuropathy. In most of the studies of cardiac autonomic function in alcohol-dependent subjects, investigators have failed to take into account many of these confounders. [5] In addition, some of the earlier studies carried out prior to the Task Force recommendations [6] have used different frequency ranges for the power spectra without normalization for total power, while others have used only the time domain method for heart rate variability (HRV) analysis. [5] The current study attempts to control for some of these confounders within the limits of the study design to evaluate the true autonomic changes in ADS. The current study also uses postural challenge as a stimulus to evaluate the autonomic changes as previous studies have shown that various physiological maneuvers such as active standing, passive head-up tilt or active standing that impose a perturbation on the steady functioning of the autonomic nervous system may help uncover subtle deficits in autonomic function.


   Materials and Methods Top


Twenty-seven male subjects with ADS who were admitted to an inpatient deaddiction program following detoxification were recruited in the study. They were screened for the severity of withdrawal symptoms using Clinical Institute Withdrawal Assessment of Alcohol scale, revised (CIWA-Ar), [7] and were included in the study only if their score was less than eight. Exclusion criteria included medical disorders (hypertension, cardiac disorders, liver disease including cirrhosis and hepatitis, pancreatitis, chronic lung disease, diabetes mellitus, thyroid dysfunction), major psychiatric disorders such as psychotic, depressive and anxiety disorders, alcohol-related delirium and clinical nutritional deficiencies. Healthy, age-matched controls were also recruited. None of the control subjects drank alcohol currently or in the past. Before recruitment, details of the procedure were discussed, an explanatory statement was provided to the subjects and written, informed consent was taken. The study was approved by the Institutional Ethics Committee.

The study subjects were diagnosed as ADS using ICD-10 diagnostic criteria, [8] the age of onset of starting was assessed using the definition of Grant et al.,[9] age of onset of problem drinking, dependence and total duration of drinking were assessed using alcohol section of Schedules for Clinical Assessment in Neuropsychiatry (SCAN) [10] and the severity of alcohol dependence was assessed using Severity of Alcohol Dependence Questionnaire (SADQ). [11] Subjects were questioned for symptoms suggestive of autonomic nervous dysfunction and underwent a detailed physical examination that included a comprehensive clinical neurological examination and anthropometric measures (height, weight, waist and hip circumference). Routine laboratory tests included resting ECG, chest X-ray, liver function tests and pancreatic enzymes, blood glucose, hemoglobin and coagulation parameters. Patients were detoxified, medication-free and were between 14 and 21 days after the last drink at the time of autonomic evaluation. Autonomic evaluation was performed early in the morning after an overnight fast. Subjects rested for 30 min so that sympathoadrenal activation would return to baseline values as suggested by Copeland et al.[12] Beat-to-beat heart rate evaluation was performed for a total duration of 10 min (5 min supine and 5 min standing). Data were subjected to power spectral analysis and details regarding signal acquisition and power spectral analysis of heart rate variability have been described earlier. [13],[14]


   Results Top


The mean age of the alcohol dependence group and control participants was 35.6±7.3 years vs. 35.4±7.9 years, respectively. The mean age of starting alcohol use, problem drinking and dependence was 17.7±9.1 years, 21.3±10.1 years and 25.2±12.6 years, respectively. The mean severity scores was 27.7±17.9 and the duration of alcohol use was 7.56±5.59 years. Anthropometric measurements were similar between ADS subjects and controls.

The resting heart rate and systolic and diastolic blood pressures were also similar in both the groups. Peripheral neural examination was normal and none of the subjects had clinically significant autonomic symptoms. In both groups, evaluated separately, high frequency (HF) in absolute units fell significantly with standing while low frequency (LF) (normalized) and the LF/HF ratio rose significantly [Table 1]. Delta changes in HRV measures (standing-supine) were also calculated. These data indicated that the alcohol-dependence group had a lower delta HF (P=0.06) and a significantly lower delta LF (P=0.04) response when expressed in absolute units compared with the controls [Table 1]. These delta differences were not statistically significant when the data were represented in normalized units.
Table 1: Comparison of indices of heart rate variability in alcohol‑dependence syndrome and control groups

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None of the clinical variables such as age of starting alcohol use, age of onset of problem drinking, age of onset of dependence and duration of alcohol use within the subjects with ADS correlated with the heart rate variability parameters.


   Discussion Top


The present study examined cardiac autonomic modulation with postural stress in a carefully selected group of male patients with ADS and healthy controls using spectral measures of heart rate variability. The data indicate that both groups had vagal withdrawal with standing; the change (delta HF) was, however, smaller in patients with ADS as compared with that in the healthy controls. Cardiac vagal involvement in chronic alcoholic dependence syndrome has been reported using conventional tests. [15] However, an attenuated response in LF power to active standing suggestive of cardiac sympathetic involvement, to the best of our knowledge, has not been reported by others. This may be related to the measure of HRV that we adopted in this study, namely change in HRV measures over resting values during the first few minutes in response to active standing. Previous research has suggested that perturbation in autonomic nervous system may help uncover subtle deficits in cardiac autonomic system that may be missed if one relies only on baseline measures of HRV. [14] Further, the role of LF component as a marker of sympathetic activity has been contested when interpreted using only baseline data. [16],[17],[18],[19] This could be overcome when change of posture is used as a stimulus, which leads to release of baroreceptor restraint of sympathetic activity together with vagal withdrawal. Therefore, LF is considered to be a marker of sympathetic activity when interpreted during postural challenge. [14],[20]

Although cardiac sympathetic involvement is considered to be rare among patients with ADS, [21] a few instances of orthostatic hypotension have been reported in chronic alcohol-dependent individuals. [22] None of the subjects from the present study had ever suffered from syncope. While the etiopathogenesis of alcohol-induced autonomic neuropathy is not known, the dose-dependent relationship between alcohol consumption and the degree of the lesions of the autonomic nervous activity suggests a direct toxic effect of alcohol or its metabolites on axons or neuron body cells through alterations in ionic channels, membrane fluidity and formation of oxygen free radicals are plausible mechanisms. [23]

Within the group of subjects with alcohol dependence, we did not find any associations between various clinical variables such as age of onset of drinking, age of onset of problem drinking, severity of ADS and measures of heart rate variability. This could be due to many factors. First, the sample size was relatively small and was calculated to allow detection of differences of HRV between the groups as a primary outcome. Second, subjects with ADS who had co-morbid medical/psychiatric conditions were not included in the study; these patients would likely be those with the most severe dependence. Thus, majority of the subjects included in the study were moderately dependent on alcohol according to SADQ. Finally, none of the participating subjects had any clinically significant autonomic symptoms.

In conclusion, in the present study, there were alterations in cardiac sympathetic and parasympathetic modulation using spectral measures of HRV in response to postural change in a group of well-characterized male subjects with ADS compared with healthy controls.

Clinical implications

This study has found that postural challenge combined with spectral measures of HRV uncovered cardiac sympathetic and parasympathetic alterations in cardiac autonomic function in patients with ADS even though they did not report any symptoms of autonomic dysfunction. This procedure can help clinicians in recognizing cardiac autonomic dysfunction early and can help implement therapeutic/preventive measures. Interventions aimed at arresting further declines in autonomic function could be the focus of future studies.

 
   References Top

1.Subir KD, Balakrishnan V, Vasudevan DM. Alcohol: Its health and social impact in India. Natl Med J India 2006;19:94-9.  Back to cited text no. 1
    
2.Hasin DS, Stinson FS, Ogburn E, Grant BF. Prevalence, correlates, disability, and comorbidity of DSM-IV alcohol abuse and dependence in the United States: Results from the National Epidemiologic Survey on Alcohol and Related Conditions. Arch Gen Psychiatry 2007;64:830-42.  Back to cited text no. 2
[PUBMED]    
3.Melgaard B, Somnier F. Cardiac neuropathy in chronic alcoholics. Clin Neurol Neurosurg 1981;83:219-24.  Back to cited text no. 3
[PUBMED]    
4.Weise F, Müller D, Krell D, Kielstein V, Koch RD. Heart rate variability of chronic alcoholics in withdrawal and abstinence. Clin Neurol Neurosurg 1985;87:95-8.  Back to cited text no. 4
    
5.Malpas SC, Whiteside EA, Maling TJ. Heart rate variability and cardiac autonomic function in men with chronic alcohol dependence. Br Heart J 1991;65:84-8.  Back to cited text no. 5
[PUBMED]    
6.Heart rate variability. Standards of measurement, physiological interpretation, and clinical use. Task Force of The European Society Of Cardiology and the North American Society of Pacing And Electrophysiology. Circulation 1996;93:1043-65.  Back to cited text no. 6
[PUBMED]    
7.Sullivan JT, Sykora K, Schneiderman J, Naranjo C, Sellers EM. Assessment of alcohol withdrawal: The revised Clinical Institute Withdrawal Assessment of Alcohol scale (CIWA-Ar). Br J Addict 1989;84:1353-7.  Back to cited text no. 7
    
8.World Health Organization. The ICD-10 Classification of Mental and Behavioural Disorders. Clinical Descriptions and Diagnostic Guidelines. 10th edn. Geneva: World Health Organization (WHO); 1992.  Back to cited text no. 8
    
9.Grant BF. The impact of a family history of alcoholism on the relationship between age at onset of alcohol use and DSM-IV alcohol dependence: Results from the National Longitudinal Alcohol Epidemiologic Survey. Alcohol Health Res World 1998;22:144-7.  Back to cited text no. 9
[PUBMED]    
10.Schedules for clinical assessment in neuropsychiatry (SCAN), version 2.0. Manual. Geneva: World Health Organization; 1994.  Back to cited text no. 10
    
11.Stockwell T, Murphy D. Hodgson R. The severity of alcohol dependence questionnaire: Its use, reliability and validity. Br J Addict 1983;78:145-55.  Back to cited text no. 11
    
12.Copeland KC, Kenney FA, Nair KS. Heated dorsal hand vein sampling for metabolic studies: A reappraisal. Am J Physiol 1992;263:E1010-4.  Back to cited text no. 12
[PUBMED]    
13.Vaz M, Sucharita S, Bharathi AV. Heart rate and systolic blood pressure variability: The impact of thinness and aging in human subjects. J Nutr Health Aging 2005;9:341-5.  Back to cited text no. 13
[PUBMED]    
14.Srinivasan K, Sucharita S, Vaz M. Effect of standing on short term heart rate variability across age. Clin Physiol Funct Imaging 2002;22:404-8.  Back to cited text no. 14
[PUBMED]    
15.Matikainen E, Juntunen J, Salmi T. Autonomic dysfunction in long-standing alcoholism. Alcohol Alcohol 1986;21:69-73.  Back to cited text no. 15
[PUBMED]    
16.Malliani A, Pagani M, Lombardi F, Cerutti S. Cardiovascular neural regulation explored in the frequency domain. Circulation 1991;84:482-92.  Back to cited text no. 16
[PUBMED]    
17.Inoue K, Miyake S, Kumashiro M, Ogata H, Yoshimura O. Power spectral analysis of heart rate variability in traumatic quadriplegic humans. Am J Physiol 1990;258:H1722-6.  Back to cited text no. 17
[PUBMED]    
18.Houle MS, Billman GE. Low-frequency component of the heart rate variability spectrum: A poor marker of sympathetic activity. Am J Physiol 1999;276:H215-23.  Back to cited text no. 18
[PUBMED]    
19.Skyschally A, Breuer HW, Heusch G. The analysis of heart rate variability does not provide a reliable measurement of cardiac sympathetic activity. Clin Sci (Lond) 1996;91:102-4.  Back to cited text no. 19
[PUBMED]    
20.Malliani A, Pagani M, Furlan R, Guzzetti S, Lucini D, Montano N, et al. Individual recognition by heart rate variability of two different autonomic profiles related to posture. Circulation 1997;96:4143-5.  Back to cited text no. 20
[PUBMED]    
21.Low PA, Walsh JC, Huang CY, McLeod JG. The sympathetic nervous system in alcoholic neuropathy: a clinical and pathological study. Brain 1975;98:357-64.  Back to cited text no. 21
[PUBMED]    
22.Eisenhofer G, Whiteside EA, Johnson RH. Plasma catecholamine responses to change of posture in alcoholics during withdrawal and after continued abstinence from alcohol. Clin Sci (Lond) 1985;68:71-8  Back to cited text no. 22
    
23.Monforte R, Estruch R, Valls-Solé J, Nicolás J, Villalta J, Urbano-Marquez A. Autonomic and peripheral neuropathies in patients with chronic alcoholism. A dose-related toxic effect of alcohol. Arch Neurol 1995;52:45-51.  Back to cited text no. 23
    

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Correspondence Address:
K Srinivasan
Department of Psychiatry and Vice Dean, St John's Research Institute, Bangalore 34, Karnataka
India
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/0019-5545.102426

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