It was investigated contractility and adrenoreactivity of intact myocardium strips of right ventricular in experiment with 60 rats. They were assessed by the force of induce contraction and its changes under the influence of adrenaline (10-9 or 10-5 g / ml). Found that these indicators do not depend on the phases of the estrous cycle and the presence of pregnancy. Histidine (10-10-10-4 g / ml) did not increase the response to adrenalin (10-9 g / ml), but increased the force of the contractions in rats in progesterone dominance (trend) and pregnancy (statistically significant). Against the background of propranolol (10-8 g / mL) or atenolol (10-8, 10-6 g / mL), adrenaline (10-5 g / mL) instead of increasing the force of contraction reduced it (probably due to activation of beta3-, alpha1 - and alpha1 a2- adrenergic receptors), and histidine (10-4 g / mL) prevented this reduction, but does not restore full ability of adrenaline to exert a positive inotropic effect. On the background of nicergoline (10-8 g / mL or nicergoline and propranolol (10-8 g / mL), adrenaline (10-5 g / mL) did not alter the force of contraction, and histidine (10-4 g/mL) restore ability of adrenaline to exert a positive inotropic effect but only in the experiments with nicergoline. Concluded that histidine increases the efficiency of the activation of all three (beta1-, beta2- and beta3-) populations of myocardial beta-adrenoceptoprs, including at lower by adrenergic blockers. Therefore, histidine proposed as an antagonist of beta-adrenergic blockers and as resensitizator of these receptors.
Core Tip: In the experiments with strips of the right ventricle of 40 nonpregnant and 20 pregnant rats histidine (10-10-10-4 g /mL) did not increase the response to adrenaline (10-9 g / ml), but increased the force of contractions in pregnant rats. On the background of propranolol (10-8 g / mL) or atenolol (10-8, 10-6 g / mL), adrenaline (10-5g/mL) showed a negative inotropic effect, and histidine (10-4 g / mL) prevented it, but does not restore the ability of adrenaline to show positive inotropic effect,. i.e histidine exhibits the properties of the antagonist of beta-blockers and of resensitizator of beta-adrenoceptors
Oussama Ssouni*, Abdelilah Ghannam, Brahim El-Ahmadi, Zakaria Belkhadir, Khalid Abidi, Amal Bouziane and Redouane Abouqal
Published on: 14th August, 2023
Background: Postoperative Pulmonary Complications (PPCs) escalate mortality, hospitalization, and costs. This study aimed to predict PPCs after curative digestive cancer surgery using thickness fraction (TFdi) determined by ultrasonography. Methods: A prospective study was conducted over a period of 9 months. Diaphragmatic ultrasound was performed pre-surgery and repeated postoperatively (within 24 hours of ICU admission, then day 3). Right and left hemidiaphragm thickness at end-expiration (TEE) and peak-inspiration (TPI) were measured using ultrasonography. The maximal diaphragm thickening fraction during inspiration (TFdi,max) was calculated: TFdi,max = (TPI–TEE)/TEE. Patients were classified into No-PPCs and PPCs groups. Results: 159 patients participated, 55 (34.6%) developed PPCs. ICU stay was longer in PPCs patients with more deaths. TFdi,max decreased postoperatively and remained lower in PPCs patients [44.83% ± 11.07 vs. 31.54% ± 8.45; p < 0.001]. The receiver operating characteristic curve yielded an area under the curve of 0.83 [95% IC: 0.754 – 0.887]. TFdi,max < 37% had 72.7% sensitivity (95% IC: 59.0% – 83.8%) and 80.8% specificity (95% IC: 71.8% – 87.8%), Positive and negative Likelihood Ratios were 3.7 (95% IC: 2.4 – 5.7) and 0.3 (95% IC:0.2 – 0.5), respectively. In multiple logistic regression, preoperative risk factors for PPCs included TFdi,max < 37% [OR: 7.10; 95% CI: 1.71 – 18.60; p < 0.001] and supramesocolic surgery [OR: 9.94; 95% CI: 3.62 – 27.29; p < 0.001]. Epidural administration was protective [OR: 0.21; 95% CI: 0.052 – 0.87; p = 0.031]. Conclusion: A low preoperative TFdi,max identifies high-risk PPCs patients after digestive cancer surgery, aiding targeted preventive strategies like inspiratory muscle preoperative training.
Akmal Shams, Ikramullah Ibrahimi* and Hayatullah Ahmadzai
Published on: 27th August, 2024
Myocardial infarction is the leading cause of morbidity and mortality worldwide. The overall aim of the study was to evaluate community awareness about myocardial infarction.It was a community-based cross-sectional study conducted during one month including both male and female participants aged 18 years and over in Nangarhar province of Afghanistan. The percentage of awareness for risk factors was as follows: Diabetes (56.4%), Hypertension (43.4%), Elderly (42.1%), Obesity (39.8%), Physical inactivity (38.5%), Hyperlipidemia (37.6%), and Family history (33.8%). Furthermore, knowledge about symptoms and signs was as the following: chest pain (67.4%), pain in neck and jaw (57.8%), Dyspnea (50.7%), pain in arms (46.1%), weakness/fainting (40.1%), cold sweats (38.2%), nausea and vomiting (34.5%), anxiety (29.6%), fever (22.7%), hypotension/shock (20.1%), and silent myocardial infarction (11.3%). Moreover, 24% of participants did not know about the prevention strategies for myocardial infarction. Regarding treatment, 80.3% of participants exactly knew to go to the emergency room, 11.9% of participants would intend to go to a general practitioner (GP), 5.6% of participants would ask others for advice on what to do, and 2.2% of participants would wait to see if the symptoms go away spontaneously or if the symptoms were due to other diseases. The current awareness level about myocardial infarction especially atypical symptoms, risk factors, prevention, and treatment strategies in Nangarhar residents was insufficient, especially in females and healthy individuals, and warrants designing and implementing immediate awareness programs in order to avoid delay of treatment-seeking, misbeliefs about the disease and subsequent morbidity and mortality.
A highly focused and highly cost-effective failure-oriented-accelerated-testing (FOAT) suggested about a decade ago as an experimental basis of the novel probabilistic design for reliability (PDfR) concept is intended to be carried out at the design stage of a new electronic packaging technology and when high operational reliability (like the one required, e.g., for aerospace, military, or long-haul communication applications) is a must. On the other hand, burn-in-testing (BIT) that is routinely conducted at the manufacturing stage of almost every IC product is also of a FOAT type: it is aimed at eliminating the infant mortality portion (IMP) of the bathtub curve (BTC) by getting rid of the low reliability “freaks” prior to shipping the “healthy” products, i.e., those that survived BIT, to the customer(s). When FOAT is conducted, a physically meaningful constitutive equation, such as the multi-parametric Boltzmann-Arrhenius-Zhurkov (BAZ) model, should be employed to predict, from the FOAT data, the probability of failure and the corresponding useful lifetime of the product in the field, and, from the BIT data, as has been recently demonstrated, - the adequate level and duration of the applied stressors, as well as the (low, of course) activation energies of the “freaks”. Both types of FOAT are addressed in this review using analytical (“mathematical”) predictive modeling. The general concepts are illustrated by numerical examples. It is concluded that predictive modeling should always be conducted prior to and during the actual testing and that analytical modeling should always complement computer simulations. Future work should be focused on the experimental verification of the obtained findings and recommendations.
Alessandra Laforgia*, Daniela Di Venere, Saverio Capodiferro, Vanja Granberg, Giuseppe Barile and Massimo Corsalini
Published on: 11th March, 2024
Periodontal diseases are a consequence of the host’s inflammatory and immune mechanisms against dysbiotic bacterial plaque. Given the role of probiotics in biofilm control and modulation of dysbiosis, this study assessed the efficacy of a specific strain of Lactobacillus Reuteri, DSM 17938, in the treatment of stage II and III periodontitis. 36 patients were randomly allocated into two groups: group A, the treated group; and Group B, the control group. The treated group and the control group both underwent initial periodontal debridement. Patients received medications after undergoing periodontal debridement. Clinical parameters were assessed at baseline and at 21 days. All parameters evaluated, Probing Depth (PD), Full Mouth Bleeding score (FMBS), and Full Mouth Plaque Score (FMPS) showed a reduction over time in both groups. The treated group showed a better reduction (p = 0.05) for PD. As far as the depth of probing is concerned, the decrease observed between the control group and the group treated with probiotics is such as to be considered statistically significant and since the average of the values for the treated group is higher than that of the control group, the use of probiotics has an efficacy of medium statistical importance in the treatment of periodontal disease.
Mareike Wolf-Fédida, Jelena Rosic, Gilles Arsène Aizan, Fanny Houzé and Laurent Vidal
Published on: 12th March, 2024
The authors are searchers in psychopathology and communicate here about the dead wishes in relation to euthanasia. In Europe, the question comes regularly up to know if the law should be changed concerning the prohibition of euthanasia. The health system obeys progressively a modern idea of comfort and the “good life”. The authors are psychotherapists and their methodology is based mainly on phenomenological psychology, psychoanalysis, and psychopathology. Statistics of the French Ministry of Health will support their statements. Different clinical experiences with young patients, aging patients, or near-to-death patients are crossed and compared to those marked by heavy experiences like rape or amputation. The unbearable nature of their suffering makes them ask frequently to stop the pain. They would prefer being dead. This contribution examinates this kind of demand to find a helpful position for the caregiver and the patient. We should consider that near-death patients may often be at the climax of anxiety and depression is likely to switch over to dementia. In asking to finish with life, this purpose may change one day to another – sometimes it just highlights the wish to see things changed. The position of society and the medical staff has a high influence as well. Asking for euthanasia shows the variety of the same words that have different meanings from a medical, psychological, or psychopathological viewpoint. The purpose is to consider these aspects with the patient’s demand.
Introduction: Congenital heart diseases (CHD) are leading causes of childhood morbidity and mortality especially in developing countries. Community-based studies are important in ascertaining the burden of the disease.
Objectives: The study was set out to determine the prevalence and types of CHD among primary school children in Port Harcourt Local Government Area (PHALGA) of Rivers State, Niger Delta, Nigeria.
Methods: A total of 1,712 primary school pupils were selected by multistage sampling from twelve schools in PHALGA. A questionnaire was used to obtain information from pupil’s parents on their child’s biodata and symptoms suggestive of heart disease. General physical and cardiovascular system examinations were carried out on each selected pupil, following which those with symptoms and/or signs suggestive of heart disease had echocardiographic confirmation of their cardiac status.
Results: The 1,712 subjects were aged 5-14 (mean 8.48 ± 2.30) years. 874 (51.1%) were females while males were 838 (48.9%). The study revealed that 31 pupils had congenital heart diseases confirmed by echocardiography, giving a prevalence of 18.1 per 1,000 pupils. The commonest cardiac defects seen were acyanotic CHD in 30 (96.8%) pupils while cyanotic CHD was seen in only one (3.2%) pupil. Among the acyanotic CHD, atrial septal defects (83.9%) followed by ventricular septal defects (9.7%) were the commonest. CHD occurred with higher frequency among females (64.5%) and among the younger age group of 5-9 years (61.3%) though these were not statistically significant (p > 0.005).
Conclusion: Cardiac examination as part of compulsory health screening at primary school entry will help detect children with CHD, reduce delay in diagnosis for intervention, avert debilitating morbidity and assure a better quality of life.
Different types of photocatalysts in single and binary systems in different molar ratios were synthesized by the co-precipitation method. Crystal structure, surface area, morphology, bandgap energy, functional groups, and optical properties of the as-synthesized photocatalysts were characterized by using XRD, BET, SEM-EDX, UV/Vis, FTIR, and PL instruments, respectively. Photocatalytic activities of the single and binary composite were evaluated by using an aqueous solution of model pollutant MeO. Photocatalytic activities of binary CdS/CeO2 (1:1) nanocomposite were found to be higher than those of single counterparts. The degradation efficiencies of the binary system were found to be 53.73%. The reusability of the binary photocatalyst was tested and only about 33% decrement was observed after four successive runs. The degradation of MeO dye follows the pseudo-first-order kinetics for the entire as-synthesized nanocomposite. The results also suggest that in the CdS/CeO2 (1:1) composite the photoinduced electrons and holes can be effectively separated.
Objective: The aim of this study was to estimate the predictive clinical value of CHA2DS2-VASc score for no-reflow phenomena in patients having ST-segment elevation myocardial infarction (STEMI) who applied to primary percutaneous coronary intervention (PCI).
Subjects and Methods: Three-hundred STEMI patients underwent primary PCI. They were classified into: group (1) included 27 patients with no-reflow and group (2) included 273 patients without no-reflow (control). CHA2DS2-VASc risk score was computed for each patient.
Results: This study found statistically significant difference (p < 0.05) in multivariate analysis of the association between CHA2DS2-VASc score and no-reflow phenomenon. The predictive power of individual components in CHA2DS2-VASc score for no-reflow was statistically significant difference (p < 0.05). So, significantly higher CHA2DS2-VASc score is connected with higher risk of no-reflow and in-hospital mortality rate.
Conclusion: Significantly higher CHA2DS2-VASc score is associated with higher risk of no- reflow phenomenon and in-hospital mortality rates in patients with STEMI who underwent primary PCI.
Porphyrias are a group of inherited metabolic disorders of haem biosynthesis, involving a deficiency in the enzyme uroporphyrinogen decarboxylase. In this case report we present a case of a patient with porphyria cutanea tarda (PCT). A 40-year-old man on hemodialysis after a kidney transplant rejection reaction, complaining of skin changes, with a history of smoking and alcohol intake. Treated with Fusidic acid Betamethasone cream, and erythropoietin. Porhyria cutanea tarda can be considered in a patient who complains of skin changes. History of alcohol intake, smoking, high ferritin levels, and increased hepatic markers can raise suspicion of disease. In patients with ESRD treatment with erythropoietin, SPF 50+ sun cream, Fusidic acid, and Betamethasone can be effective.
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