Mental Work Stimulates Cardiovascular Responses through a Reduction in Cardiac Parasympathetic Modulation in Men and Women

Pérusse-Lachance, Émilie; Tremblay, Angelo; Chaput, Jean‐Philippe; Poirier, Paul; Teasdale, Normand; Drapeau, Vicky; Brassard, Patrice

doi:10.4172/2167-7662.1000107

Cited by 3 publications

(3 citation statements)

References 39 publications

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“…Raised levels of blood cortisol and CVR e.g. HR, SBP and DBP found in present study under stress were in consistent with some previous works [24][25][26][27] . Increased SBP, DBP along with raised cardiac out put causes the changes in hydrostatic pressure, and in turn this may cause fluid shift from circulatory system.…”

Section: Discussionsupporting

confidence: 94%

“…Increased SBP, DBP along with raised cardiac out put causes the changes in hydrostatic pressure, and in turn this may cause fluid shift from circulatory system. By this mechanism of increasing hydrostatic pressure under psychological stress, the acute intravascular hemoconcentration might occur 24,28,29 . Some investigators argued that increased lipoproteins in circulation were because of such haemoconcentration.…”

Section: Discussionmentioning

confidence: 99%

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Association of blood lipids, cortisol and Hemodynamics Under stress: A possible role in early Atherogenesis

Ghulam Mujadid Qureshi,

Zafar Ali Pirzado,

Fayyaz Memon

et al. 2019

j Muhammad Med Coll

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Introduction: High blood cholesterol is claimed as a risk factor but recently it is accepted that cholesterol is increased under psychological stress. When raised in blood, cholesterol plays role in atherosclerosis formation; a role which is being debated since last many decades but still various questions is un-answered. Role of stress in early atherogenesis with association to alteration in blood lipids has been proposed but the available literature is scanty on the subject. Objective: To explore the association of alterations in blood lipids, cortisol level and hemodynamics under mental stress in youth with no apparent heart disease. Methodology: 114 male participants were selected from 397 volunteers as per ‘selection criterion’ approved by scientific committee. The volunteers were examined two times: during stress task as ‘stress-study’ and during non-stress period as ‘control’ according to ‘paired sample’ design. Thus, 56.54% apparently healthy subjects were included with exclusion ratio of 43.58%. All experiments were conducted under standard methods at LINAR-Larkana and Physiology Department of Sindh University, Jamshoro. Blood sample were taken between 9.00 am to 12.00 pm. Results: Cortisol, systolic and diastolic blood pressures and heart rate were significantly increased during stress session. Different lipid levels were changed with different significant values. Correlations of some altered lipid levels with raised values of hemodynamics and cortisol detected were positive and significant. Conclusion: Most changes in the level of variables were found prone to be “atherogenic in pattern” due to psychological stress. This work may pave a way for better understanding of relationship in between lipid alterations, mental stress and early atherogenesis. For that further studies are needed. Key Words: Cholesterol, Hemodynamics, Cortisol, psychological stress.

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Section: Discussionsupporting

confidence: 94%

Section: Discussionmentioning

confidence: 99%

Association of blood lipids, cortisol and Hemodynamics Under stress: A possible role in early Atherogenesis

Ghulam Mujadid Qureshi,

Zafar Ali Pirzado,

Fayyaz Memon

et al. 2019

j Muhammad Med Coll

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“…Then impact of MWL should be further studied in individuals perform mental tasks on a real work condition to better understand its long term effect on health. Finally, in the present study we used n-Back task as mental work condition which is differ from Multi Attribute Task Battery [36], arithmetic task [34] and computer job tasks [37] what has been used in the literature.…”

Section: Limitationsmentioning

confidence: 99%

Psycho Physiological and Subjective Responses to Mental Workload Levels during N-Back Task

Fallahi¹,

Heidarimoghadam²,

Motamedzade³

et al. 2016

J Ergonomics

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The present study investigated the effects of mental workload levels on psychophysiological and subjective responses during n-Back task. Heart rate, heart rate variability, shoulder muscle activity, EEG and EOG were measured during performing four mental tasks by 32 males. NASA-TLX completed at the end of each mental task. Using NASA-TLX the subjects stated that the task demands of very high mental task were higher than those of low, medium and high mental tasks. By increasing mental workload LF/HF ratio, shoulder muscle activity, eye activity and alpha activity significantly changed. It suggests that mentioned indices have enough sensitivity to quantify mental workload. Future studies should implement to determine the long-term effects such as cardiovascular and mental disorders in both males and females which experience different levels of mental workload in daily working condition. To get better results suggested those parameters such as: cultural differences, anthropometric data, body mass index, alertness, shift work and menstrual cycle take into account.

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Time domain measures of heart rate variability during acute mental stress in Type 2 diabetics- A case control study

Deepak¹,

Nallulwar²,

Khode³

2014

Natl J Physiol Pharm Pharmacol

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Background: Cardiovascular Autonomic Diabetic Neuropathy (CADN) is one of the most important diabetes-associated complications. Reduced heart rate variation (HRV) is the earliest indicator of CADN. The prospect of using time domain analysis of HRV using mental arithmetic as a stressor has for early diagnosis of CADN has not been studied so far. Aims & Objective: To compare time domain parameters of HRV at rest and during acute mental stress between Type 2 diabetics and non-diabetics. Materials and Methods: 30 male asymptomatic, Type 2 diabetics with duration of diabetes of 2-8 yrs with RBS ≥ 200 mg/dl or FBS ≥ 126 mg/dl in the age group of 30-65 yrs were chosen as subjects. 30 age and sex matched healthy nondiabetics were chosen as controls. HRV analysis was done using ECG recorded at rest in supine position for 5 min and during 5 min of acute mental stress testing. Results: At rest standard deviation of all R-R intervals (SDNN), root mean square of successive RR-interval differences (RMSSD), number of intervals differing by > 50ms from adjacent interval (NN50) and percentage of NN50 (pNN50) were significantly less in diabetics as compared to nondiabetics. Mental stress showed increases in HR, SBP and DBP in non-diabetics as well as diabetics but SDNN was significantly less in diabetics as compared to non-diabetics during stress. Conclusion: Data from the study demonstrated that diabetics with 8-10 yrs history had already developed parasympathetic autonomic neuropathy. Time domain analysis of HRV during mental stress can be used as a valuable tool for early diagnosis of autonomic neuropathy to prevent further complications.

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Mental Work Stimulates Cardiovascular Responses through a Reduction in Cardiac Parasympathetic Modulation in Men and Women

Cited by 3 publications

References 39 publications

Association of blood lipids, cortisol and Hemodynamics Under stress: A possible role in early Atherogenesis

Association of blood lipids, cortisol and Hemodynamics Under stress: A possible role in early Atherogenesis

Psycho Physiological and Subjective Responses to Mental Workload Levels during N-Back Task

Time domain measures of heart rate variability during acute mental stress in Type 2 diabetics- A case control study

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