Preferred Language
Articles
/
iqjmc-482
Obesity Impact on Heart Rate Variability Indices and the Modulation Effect of Regular Physical Activity.
...Show More Authors

Background: Obesity is imposing a growing threat to world health. The autonomic nervous system (ANS) regulates visceral functions via balance between sympathetic and parasympathetic divisions. In the cardiovascular system (CVS) this non stationary balance results in the fluctuation between intervals of consecutive heart beats, so called heart rate variability (HRV). Obesity is one of the causative co-morbid conditions leading to metabolic and cardiac disorders as it is accompanied with varied combinations of abnormalities in the ANS, one view is that obese people have higher sympathetic tone. HRV measures the effect of autonomic function on the heart alone. Therefore, it could be the most useful method to investigate the effect of obesity on CVS as obesity is associated with decreased HRV. Regular physical activity has been shown to increase HRV in healthy individuals. Therefore, exercise training may improve cardiac autonomic regulation in a variety of clinical populations including obese individuals.

Objectives: to assess the alteration in cardiac autonomic function that may be associated with obesity by measuring HRV indices using (Holter monitoring) and to test the hypothesis that regular physical activity is associated with improved HRV.

Methods: A total of 49 asymptomatic obese individuals (28 males, 21 females) were recruited from Obesity Unit in Alkindy College of Medicine/ University of Baghdad.

Holter monitoring was applied to the obese individuals to assess HRV in addition to 47 healthy non-obese subjects of either sex as controls. All participants were subjected to 4-6 weeks moderate intensity of physical activity, and then Holter monitoring was repeated after the end of physical activity. Blood tests were done for all participants to exclude renal, liver and endocrine dysfunctions.

Results: all HRV indices were significantly low in obese subjects (p value less than 0.05) body mass index (BMI) was negatively correlated with overall HRV index (p= 0.0001, r= - 0.87). After onset of regular physical activity, all HRV indices were increased significantly in obese subjects whereas the increase in HRV indices in normal weight subjects did not reach the level of significance.

Conclusion: Obese subjects had a significant lower values of all HRV indices, overall low HRV values usually indicate a relative sympathetic dominance. BMI was negatively correlated with overall HRV index significantly in obese subjects. The significant increment in all HRV values in obese subjects after the onset of regular physical activity indicates a shift of sympathetic/parasympathetic balance towards increased vagal activity, which is a marker for cardiac autonomic modulation that may offset the negative effect of obesity.

Crossref
View Publication Preview PDF
Quick Preview PDF
Publication Date
Mon Dec 10 2007
Journal Name
Iraqi Journal Of Laser
The Effect of He:Ne Laser on Viability and Growth Rate of Leishmania Major
...Show More Authors

An isolate of Leishmania major was grown on the semisolid medium and incubated at 26ºC. The isolate was irradiated by He: Ne laser (632.8 nm, 10 mW) at exposure times (5, 10, 15, 20, 25, 30) minutes in their respective order. The unirradiated groups represent control group. Growth rate and percentage of viability were examined during six days after irradiation. The change in these two parameters reflects the effect of irradiation on the parasite. The results refers that the general growth effected by irradiation in comparison with un irradiation group, The growth rate of parasite decrease with increasing the exposure time in comparison with control group. Parasite viability decrease with irradiation and the percentage of living cell dec

... Show More
View Publication Preview PDF
Publication Date
Sat Feb 02 2019
Journal Name
Journal Of The College Of Education For Women
The guidance hierarchy to describe heart in Holly Quran,(Ungrateful hearts): The guidance hierarchy to describe heart in Holly Quran,(Ungrateful hearts)
...Show More Authors

Abstract:
In the name of God , most Gracious , most merciful
The Holy Quran conciders the celestial book which consults
languages with its accents , and consults the people with their circumstances
and it takes care of all worships.
We find that Holy Quran consults atheist human and afaithless one ,
therefore , it aspect the orabion of God to human “s heart as a results , it is
one of an incapacitation of Holly Quran in This research.
WE try to taik about special vocables which relate to hearts of
unfaithful hummance , so we mentio these vocables in a guidance hierarchy
table in the end of this research.

View Publication Preview PDF
Publication Date
Wed Aug 31 2022
Journal Name
Iraqi Journal Of Science
Evaluation of the Physical Parameters on Ischemic Heart Disease Patients Using Echocardiography
...Show More Authors

      Background: Left ventricular function and volumes have major diagnostic and prognostic importance in patients with various cardiac diseases, such as ischemic heart disease which is a life-threatening heart disease condition characterized by systolic dysfunction and a decrease in cardiac output. 

According to left ventricular ejection fraction, the degree of ischemic heart disease was classified as mild, moderate, and severe. To determine cardiac function and hemodynamics, the echocardiography technique is used, which is a noninvasive diagnostic method.

Patients and Methods: The study included 216 patients between 25 and 75 years old; 121 males and 95 females; 265 normal individuals (age range: 25 to 75 years ol

... Show More
View Publication Preview PDF
Scopus (3)
Scopus Crossref
Publication Date
Sun Dec 17 2017
Journal Name
Al-khwarizmi Engineering Journal
Effect of Nano Powder on Mechanical and Physical Properties of Glass Fiber Reinforced Epoxy Composite
...Show More Authors

Fiber reinforced polymer composite is an important material for structural application. The diversified application of FRP composite has taken center of attraction for interdisciplinary research. However, improvements on mechanical properties of this class of materials are still under research for different applications. In this paper we have modified the epoxy matrix by Al2O3, SiO2 and TiO2 nano particles in glass fiber/epoxy composite to improve the mechanical and physical properties. The composites are fabricated by hand lay-up method. It is observed that mechanical properties like flexural strength, hardness are more in case of SiO2 modified epoxy composite compare to other nano

... Show More
View Publication Preview PDF
Publication Date
Mon Mar 07 2022
Journal Name
Journal Of Educational And Psychological Researches
The Effect of Physical Environment and Crowded Classes on Academic Achievement
...Show More Authors

The research problem can be summarized through focusing on the environment that surrounds students and class congestion, how these factors affect directly or indirectly the academic achievement of students, how these factors affect understanding the scientific material that the student receives in this physical environment, how classroom’s components such as seats, space With which the student can move, the number of students in the same class,  the lighting, whether natural or artificial, and is this lighting sufficient or not enough, the nature of the wall paint old or modern, is it comfortable for sight, the blackboard if it is Good or exhausted,  In addition to air-conditioning sets in summer and winter, this is on the on

... Show More
View Publication Preview PDF
Publication Date
Mon May 15 2017
Journal Name
Ibn Al-haitham Journal For Pure And Applied Sciences
The Effect of Spot Size on the Fractal Optical Modulation
...Show More Authors

The present paper analyzes the signal emitting from the Reticle during changing the spot size of laser falling on the disk and shows the optimum frequency and the amount of energy window in different patterns of modulator (Reticle).  All results are obtained by establishing   a special program named “Disk optical modulator version 3" using the language visual basic 6 ahich contains many parameters. All models of optical modulator consist of twenty sectors, ten sectors are opaque and other ten sectors are transmitted for the laser. The number of sectors depends on several factors as chopping frequency, power transparent and modulation transfer function.   It has been demonstrated by simulations, the optimal

... Show More
View Publication Preview PDF
Publication Date
Tue Oct 01 2019
Journal Name
Journal Of Economics And Administrative Sciences
The impact of the RMB exchange rate on the value of Chinese exports For the period (1978-2017) using the Angel-Granger model
...Show More Authors

In this research, we sought to identify the nature of the relationship between the exchange rate of the Chinese yuan and the value of Chinese exports, through the formulation of a standard model based on the model of common integration, and based on the data of the study and using the test "Angel-Granger" It reflects the relationship between the two research variables, through which the relationship between the RMB exchange rate and the value of Chinese exports was estimated during the period 1978-2017.

View Publication Preview PDF
Crossref
Publication Date
Fri Nov 09 2018
Journal Name
Iraqi National Journal Of Nursing Specialties
Feeding Problems in Children with Congenital Heart Diseases in Nasiriya Heart Center
...Show More Authors

Objective: To identify feeding problems of children with congenital heart disease.
Methodology: Non probability (purposive) sample of (65) were selected of 225 children who visit Al Nasiriya
heart center during the period of conducting the pilot study, previously diagnosed with congenital heart
disease.
Results: The study results indicated that children with congenital heart disease have feeding difficulties, low
birth weight , repeated diarrhea , more than half of the sample taking medication for heart disease which cause
repeated vomiting, difficulty taking liquids and refusal of feeding or eating.(64.6%) of study sample suffered
from wasting. (78.5%) suffered from stunting. Almost half of the study sample suffered

... Show More
View Publication Preview PDF
Publication Date
Sun Oct 01 2023
Journal Name
Baghdad Science Journal
The Influence of Ablation Speed on the Synthesis of Carbon Nanostructures Via Pulsed Laser Ablation of Asphalt in Ethanol
...Show More Authors

Pulsed liquid laser ablation is considered a green method for the synthesis of nanostructures because there are no byproducts formed after the ablation. In this paper, a fiber laser of wavelength 1.064 µm, peak power of 1 mJ, pulse duration of 120 ns, and repetition rate of 20 kHz, was used to produce carbon nanostructures including carbon nanospheres and carbon nanorods from the ablation of asphalt in ethanol at ablation speeds of (100, 75, 50, 10 mm/s).  The morphology, composition and optical properties of the synthesized samples were studied experimentally using FESEM, HRTEM, EDS, and UV-vis spectrophotometer. Results showed that the band gap energy decreased with decreasing the ablation speed (increasing the ablation time), the mi

... Show More
View Publication Preview PDF
Scopus (1)
Crossref (1)
Scopus Crossref
Publication Date
Wed Dec 01 2010
Journal Name
Al-khwarizmi Engineering Journal
An Optimum Design of Cam Mechanisms with Roller Follower for Combined Effect of Impact and High Contact Loads
...Show More Authors

     The problem in the design of a cam is the analyzing of the mechanisms and dynamic forces that effect on the family of parametric polynomials for describing the motion curve. In present method, two ways have been taken for optimization of the cam size, first the high dynamic loading (such that impact and elastic stress waves propagation) from marine machine tool which translate by the roller follower to the cam surface and varies with time causes large contact loads and second it must include the factors of kinematics features including the acceleration, velocity, boundary condition and the unsymmetrical curvature of the cam profile for the motion curve.

     In the theoretical solution

... Show More
View Publication Preview PDF