A Model Analysis for Mean Blood Pressure using Endocrine System and Autonomic Nervous System

1994 ◽  
Vol 114 (5) ◽  
pp. 561-568
Author(s):  
Toshihiro Nishimura ◽  
Takeshi Inoue ◽  
Tetsuji Eguchi ◽  
Masao Saito
Keyword(s):  
Blood Pressure ◽  
Nervous System ◽  
Autonomic Nervous System ◽  
Endocrine System ◽  
Model Analysis ◽  
Mean Blood Pressure ◽  
Autonomic Nervous

Risk assessment of occupational and occupationally conditioned diseases connection to noise when exceeding maximum permissible levels

2019 ◽  
pp. 17-19
Author(s):  
Vladimir A. Fokin ◽  
Dmitrii M. Shlyapnikov ◽  
Svetlana V. Red’ko
Keyword(s):  
Blood Pressure ◽  
Nervous System ◽  
Autonomic Nervous System ◽  
High Blood Pressure ◽  
Noise Exposure ◽  
Physical Factors ◽  
Autonomic Nervous ◽  
Permissible Levels ◽  
The Relationship ◽  
Perm Region

In accordance with the requirements of paragraph 3.2.6 of sanitary rules and norms «Sanitary and epidemiological requirements for physical factors at workplace», in the event of exceeding noise level at workplace above 80 dBA, an employer is obliged to assess the health risk of workers and confirm an acceptable risk to their health. The connection between the incidence of occupational and occupationally conditioned diseases with noise exposure exceeding the maximum permissible levels (80 dBA) was estimated. The assessment was carried out at a food industry enterprise of Perm Region. Assessing the relationship between morbidity and noise exposure is the first step in evaluation of occupational health risks for workers exposed to noise exceeding MAL. If a reliable relationship between morbidity and noise exposure is established, an assessment of occupational risk is conducted. The odds ratio (OR) for diseases characterized by high blood pressure and disorders of autonomic nervous system was <1 (confidence interval CI=0.11–1.61 and CI=0.08–2.78, respectively). The relative risk (RR) for diseases characterized by high blood pressure and disorders of autonomic nervous system was <1. The received data testify absence of connection of morbidity with exposure to industrial noise, calculation of etiological share of responses and levels of risk is not required.

scholarly journals Patients with Impaired Descending Nociceptive Inhibitory System Present Altered Cardiac Vagal Control at Rest

2018 ◽  
Vol 1 (21;1) ◽  
pp. E409-E418
Author(s):  
Leandro Nogueira
Keyword(s):  
Blood Pressure ◽  
Nervous System ◽  
Autonomic Nervous System ◽  
Musculoskeletal Pain ◽  
Blood Pressure Response ◽  
Pain Modulation ◽  
Pressure Response ◽  
Autonomic Modulation ◽  
Inhibitory System ◽  
Autonomic Nervous

Background: Patients with chronic musculoskeletal pain have a higher chance of presenting impairment in cardiovascular autonomic modulation, which may have implications for cardiovascular events. The autonomic nervous system plays an important role in pain modulation. However, it is unclear whether patients with inefficient descending nociceptive inhibition have poorer cardiovascular autonomic modulation. Objective: To compare the cardiovascular autonomic modulation of patients with musculoskeletal pain who had normal versus impaired functioning of descending nociceptive inhibitory system (DNIS). Study Design: A cross-sectional study. Setting: Physiotherapy outpatient service. Methods: Fifty-six patients with musculoskeletal pain were included. Conditioned pain modulation was assessed by the difference of algometric values held in the dorsal forearm and tibialis anterior muscle, before and after a thermal pain stimulus was employed via the cold pressure test (CPT). Patients with inefficient DNIS in both sites were classified as impaired responders (n = 14). The others were classified as normal responders (n = 42). Cardiac autonomic modulation was monitored at rest by heart rate variability (HRV). The blood pressure response to the CPT was used as a proxy of sympathetic responsiveness. Results: Most of the patients were women (60%) and had chronic pain (75%). The groups had similar demographic characteristics. Patients with impaired DNIS showed lower HRV [RMSSD (P = 0.020), SDRR (P = 0.009), HF (ms2 ) (P = 0.027), LF (ms2 ) (P = 0.004), and total power (P = 0.002)]. The blood pressure response to CPT was similar between groups (systolic pressure, P = 0.813; diastolic pressure, P = 0.709). Limitation: Physical activity level, emotional changes, and visceral pathologies can alter the autonomic nervous system and may represent potential confounders. The low number of patients may have biased the results. Conclusion: Patients with impaired DNIS presented lower resting HRV, indicating an altered vagal control of the heart. In contrast, the blood pressure response to a sympathoexcitatory stimulus was preserved. The study was approved by the Research Ethics Committee of Augusto Motta University Centre (CAAE number: 46245215.9.0000.5235), and all patients signed the Informed Consent Form. Key words: Musculoskeletal pain, autonomic nervous system, heart rate, chronic pain, diffuse noxious inhibitory control, blood pressure, sympathetic nervous system, parasympathetic nervous system

Heart Rate and Blood Pressure Changes During Autonomic Nervous System Challenge in Panic Disorder Patients

2010 ◽  
Vol 72 (5) ◽  
pp. 442-449 ◽  
Author(s):  
Jose M. Martinez ◽  
Amir Garakani ◽  
Horacio Kaufmann ◽  
Cindy J. Aaronson ◽  
Jack M. Gorman
Keyword(s):  
Blood Pressure ◽  
Heart Rate ◽  
Nervous System ◽  
Autonomic Nervous System ◽  
Panic Disorder ◽  
Autonomic Nervous ◽  
Pressure Changes

Effect of Variation of Blood Pressure on the Autonomic Nervous System

1940 ◽  
Vol 43 (2) ◽  
pp. 236-240 ◽  
Author(s):  
E. Gellhorx ◽  
C. W. Darrow ◽  
L. Yesinick
Keyword(s):  
Blood Pressure ◽  
Nervous System ◽  
Autonomic Nervous System ◽  
Autonomic Nervous

Abstract P129: Role of the Autonomic Nervous System in Remote Postconditioning in Humans

Circulation ◽  
2008 ◽  
Vol 118 (suppl_18) ◽  
Author(s):  
Rupert P Williams ◽  
Michael I Okorie ◽  
Harminder Gill ◽  
John E Deanfield ◽  
Raymond J MacAllister ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Nervous System ◽  
Autonomic Nervous System ◽  
Whole Body ◽  
Limb Ischaemia ◽  
Protective Effects ◽  
Blood Pressure Cuff ◽  
Autonomic Nervous ◽  
Pressure Cuff ◽  
Remote Postconditioning

Brief periods of ischaemia activate systemic mechanisms that induce whole-body tolerance to subsequent prolonged and injurious ischaemia. This phenomenon, remote ischaemic preconditioning (RIPC), is sufficiently acute to reduce ischaemia-reperfusion (IR) injury even when applied simultaneously with injurious ischaemia. This aspect of RIPC is termed remote postconditioning (RPostC). We have previously demonstrated a role for the autonomic nervous system in RIPC. Using an in vivo model of endothelial IR injury, we determined if RPostC is dependent on adrenergic autonomic mechanisms. Vascular ultrasound was used to assess endothelial function in healthy volunteers by measuring dilatation of the brachial artery in response to increased blood flow during reactive hyperaemia (flow-mediated dilatation; FMD). Endothelial IR injury was induced by 20 min of upper limb ischaemia (inflation of a blood pressure cuff to 200 mm Hg) followed by reperfusion. RPostC was induced by applying 2 cycles of 5 minutes ischaemia and 5 minutes reperfusion on the leg during arm ischaemia (via a second blood pressure cuff). In order to determine the dependence of RPostC on autonomic activation, we administered the alpha adrenoceptor blocker phentolamine (0.2– 0.7mg/min, intravenously) during the application of the RPostC stimulus. FMD was determined before ischaemia and at 20 minutes of reperfusion. FMD (percentage change from baseline diameter) was compared statistically by ANOVA. IR alone caused a significant reduction in FMD (5.9±0.7% pre- versus 2.2±0.4% post-IR, n=9, P<0.001). This reduction was prevented by RPostC (5.8±0.4% pre- versus 5.4±0.3% post-IR, n=8, P>0.05). Systemic phentolamine blocked the protective effects of RPostC (FMD 6.1±0.5% pre- versus 2.0±0.3% post-IR, n=7, P<0.001). These data indicate, for the first time in humans, that protection from RPostC depends on preservation of adrenergic signalling. Alpha blockade neutralises one of the endogenous mechanisms of ischemic protection in humans; the clinical consequences of this remain to be determined.

PAROXYSMAL HYPERTENSION SIMULATING PHEOCHROMOCYTOMA

PEDIATRICS ◽  
1951 ◽  
Vol 8 (5) ◽  
pp. 664-671
Author(s):  
NATALIE ARONSON ◽  
GERTRUDE S. STERN ◽  
SIDNEY Q. COHLAN
Keyword(s):  
Blood Pressure ◽  
Nervous System ◽  
Autonomic Nervous System ◽  
Signs And Symptoms ◽  
Exploratory Laparotomy ◽  
Excessive Sweating ◽  
Autonomic Nervous ◽  
Therapeutic Value ◽  
Paroxysmal Hypertension

An eight year old child with intermittent attacks of hypertension and vomiting has been described, The blood pressure fell dramatically in response to Benzodioxane®, suggesting the presence of a pheochromocytoma, but this tumor was not found after an extensive exploratory laparotomy. The episodes of hypertension and vomiting together with the associated findings in this child of crying without tears, frequent blotching of the skin and excessive sweating and salivating are considered to be indications of an unusually labile autonomic nervous system. These latter characteristics were present in a younger sibling who also had an extremely labile blood pressure but who did not exhibit periodic attacks of hypertension and vomiting. A variety of agents were studied for their effects on the patient's signs and symptoms but none of these were demonstrated to have any therapeutic value.

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