Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 47
Filtrar
1.
J Postgrad Med ; 70(1): 53-55, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38197335

RESUMO

Raw area on the breast, especially when it is lactating, can lead to complications, including hyperprolactinemia and development of milk fistulae. A 25-year-old female presented with raw area over the left breast after 2 months of childbirth. She had history suggestive of necrotizing disease, which had primarily been managed elsewhere with debridement and dressings. We excised the raw area and applied split thickness skin grafts with minimal meshing. Bulky dressing prevented breastfeeding. On postoperative day 3, there were blebs containing milk underneath the graft. The blebs were drained and oral cabergoline was administered for 3 months. The skin graft healed well. If expression of breast milk is not possible then suppression of lactation should be considered before definitive cover of the raw area of breast.


Assuntos
Lactação , Transplante de Pele , Feminino , Humanos , Adulto , Leite Humano , Aleitamento Materno , Bandagens
2.
Cell Mol Neurobiol ; 43(5): 2005-2020, 2023 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-36138280

RESUMO

Chronic diabetic conditions have been associated with certain cerebral complications, that include neurobehavioral dysfunctional patterns and morphological alterations of neurons, especially the hippocampus. Neuroanatomical studies done by the authors have shown decreased total dendritic length, intersections, dendritic length per branch order and nodes in the CA1 hippocampal region of the diabetic brain as compared to its normal control group, indicating reduced dendritic arborization of the hippocampal CA1 neurons. Epigenetic alterations in the brain are well known to affect age-associated disorders, however its association with the evolving diabetes-induced damage in the brain is still not fully understood. DNA hypermethylation within the neurons, tend to silent the gene expression of several regulatory proteins. The findings in the study have shown an increase in global DNA methylation in palmitic acid-induced lipotoxic Neuro-2a cells as well as within the diabetic mice brain. Inhibiting DNA methylation, restored the levels of HSF1 and certain HSPs, suggesting plausible effect of DNMTs in maintaining the proteostasis and synaptic fidelity. Neuroinflammation, as exhibited by the astrocyte activation (GFAP), were further significantly decreased in the 5-azadeoxycytidine group (DNMT inhibitor). This was further evidenced by decrease in proinflammatory cytokines TNF⍺, IL-6, and mediators iNOS and Phospho-NFkB. Our results suggest that changes in DNA methylation advocate epigenetic dysregulation and its involvement in disrupting the synaptic exactitude in the hippocampus of diabetic mice model, providing an insight into the pathophysiology of diabetes-induced neuroepigenetic changes.


Assuntos
Disfunção Cognitiva , Diabetes Mellitus Experimental , Animais , Camundongos , Metilação de DNA/genética , Diabetes Mellitus Experimental/complicações , Diabetes Mellitus Experimental/genética , Encéfalo , Disfunção Cognitiva/genética , Citocinas , Hipocampo
3.
J Neurosci Res ; 99(6): 1646-1665, 2021 06.
Artigo em Inglês | MEDLINE | ID: mdl-33713475

RESUMO

Temporal lobe epilepsy (TLE) is the most common form of focal epilepsies. Pharmacoresistance and comorbidities pose significant challenges to its treatment necessitating the development of non-pharmacological approaches. In an earlier study, exposure to enriched environment (EE) reduced seizure frequency and duration and ameliorated chronic epilepsy-induced depression in rats. However, the cellular basis of beneficial effects of EE remains unknown. Accordingly, in the current study, we evaluated the effects of EE in chronic epilepsy-induced changes in behavioral hyperexcitability, synaptic transmission, synaptophysin (SYN), and calbindin (CB) expression, hippocampal subfield volumes and cell density in male Wistar rats. Epilepsy was induced by lithium-pilocarpine-induced status epilepticus. Chronic epilepsy resulted in behavioral hyperexcitability, decreased basal synaptic transmission, increased paired-pulse facilitation ratio, decreased hippocampal subfields volumes. Moreover, epileptic rats showed decreased synaptophysin and CB expression in the hippocampus. Six weeks post-SE, epileptic rats were exposed to EE for 2 weeks, 6 hr/day. EE significantly reduced the behavioral hyperexcitability and restored basal synaptic transmission correlating with increased expression of SYN and CB. Our results reaffirm the beneficial effects of EE on behavior in chronic epilepsy and establishes some of the putative cellular mechanisms. Since drug resistance and comorbidities are a major concern in TLE, we propose EE as a potent non-pharmacological treatment modality to mitigate these changes in chronic epilepsy.


Assuntos
Região CA1 Hipocampal/fisiopatologia , Região CA3 Hipocampal/fisiopatologia , Meio Ambiente , Epilepsia do Lobo Temporal/psicologia , Epilepsia do Lobo Temporal/terapia , Hipercinese/terapia , Plasticidade Neuronal , Sinapses , Animais , Calbindinas/metabolismo , Epilepsia do Lobo Temporal/complicações , Hipercinese/etiologia , Lítio , Masculino , Pilocarpina , Ratos , Ratos Wistar , Estado Epiléptico/fisiopatologia , Estado Epiléptico/prevenção & controle , Transmissão Sináptica , Sinaptofisina/metabolismo
4.
Bratisl Lek Listy ; 122(10): 700-707, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-34570570

RESUMO

Right ventricular involvement (RVMI) is a relatively frequent complication in patients developing ST-elevation acute myocardial infarction. The initial diagnosis is most often established using electrocardiography or echocardiography. The gold standard among imaging techniques is cardiac magnetic resonance, which allows to distinguish between reversible and irreversible myocardial damage. The key treatment strategy is emergent revascularization by primary percutaneous coronary intervention whereas patients with hypotension and cardiogenic shock due to the RVMI require fluid replacement and catecholamine therapy. In cases where the shock state progresses despite an adequate management, short- or, possibly, long-term mechanical assist device should be implanted either percutaneously or surgically. Despite appreciable advances in the diagnosis and management, RVMI remains an independent predictor of early as well as late complications (Fig. 6, Ref. 62). Keywords: right ventricle myocardial infarction, primary PCI, CMR, mechanical circulatory support, echocardiography.


Assuntos
Infarto do Miocárdio , Intervenção Coronária Percutânea , Infarto do Miocárdio com Supradesnível do Segmento ST , Ventrículos do Coração , Humanos , Infarto do Miocárdio/diagnóstico , Infarto do Miocárdio/terapia , Intervenção Coronária Percutânea/efeitos adversos , Infarto do Miocárdio com Supradesnível do Segmento ST/diagnóstico por imagem , Infarto do Miocárdio com Supradesnível do Segmento ST/cirurgia , Choque Cardiogênico , Resultado do Tratamento
5.
Bratisl Lek Listy ; 121(8): 537-540, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32726114

RESUMO

Transcatheter aortic valve implantation (TAVI) is a well-established management option for symptomatic patients with severe aortic stenosis. The minimally invasive transfemoral approach is considered to be superior to non-transfemoral accesses; however, its use is often limited by concomitant peripheral artery disease (PAD). Percutaneous transluminal angioplasty with stent implantation (PTA) is a gold-standard therapy for symptomatic PAD. We present 2 cases from our cohort of patients with severe aortic stenosis and PAD previously contraindicated for TAVI because of poor peripheral vascular access. However, the patients were eventually treated either by staged PTA and TAVI through an endothelialized stent or PTA and TAVI though a newly implanted peripheral stent during one procedure. We provide recommendations based on our experience of how to select the optimal patients for such a combined minimally invasive transfemoral approach (Fig. 2, Ref. 9). Keywords: transcatheter valve implantation, peripheral arterial disease, aortic valve disease, percutaneous intervention, atherosclerosis.


Assuntos
Estenose da Valva Aórtica , Implante de Prótese de Valva Cardíaca , Doença Arterial Periférica , Substituição da Valva Aórtica Transcateter , Valva Aórtica , Estenose da Valva Aórtica/cirurgia , Artéria Femoral , Humanos , Resultado do Tratamento
6.
Appl Environ Microbiol ; 82(2): 518-27, 2016 01 15.
Artigo em Inglês | MEDLINE | ID: mdl-26546426

RESUMO

The Deepwater Horizon blowout in April 2010 represented the largest accidental marine oil spill and the largest release of chemical dispersants into the environment to date. While dispersant application may provide numerous benefits to oil spill response efforts, the impacts of dispersants and potential synergistic effects with crude oil on individual hydrocarbon-degrading bacteria are poorly understood. In this study, two environmentally relevant species of hydrocarbon-degrading bacteria were utilized to quantify the response to Macondo crude oil and Corexit 9500A-dispersed oil in terms of bacterial growth and oil degradation potential. In addition, specific hydrocarbon compounds were quantified in the dissolved phase of the medium and linked to ecotoxicity using a U.S. Environmental Protection Agency (EPA)-approved rotifer assay. Bacterial treatment significantly and drastically reduced the toxicity associated with dispersed oil (increasing the 50% lethal concentration [LC50] by 215%). The growth and crude oil degradation potential of Acinetobacter were inhibited by Corexit by 34% and 40%, respectively; conversely, Corexit significantly enhanced the growth of Alcanivorax by 10% relative to that in undispersed oil. Furthermore, both bacterial strains were shown to grow with Corexit as the sole carbon and energy source. Hydrocarbon-degrading bacterial species demonstrate a unique response to dispersed oil compared to their response to crude oil, with potentially opposing effects on toxicity. While some species have the potential to enhance the toxicity of crude oil by producing biosurfactants, the same bacteria may reduce the toxicity associated with dispersed oil through degradation or sequestration.


Assuntos
Acinetobacter/metabolismo , Hidrocarbonetos/metabolismo , Petróleo/metabolismo , Acinetobacter/crescimento & desenvolvimento , Alcanivoraceae/crescimento & desenvolvimento , Alcanivoraceae/metabolismo , Biodegradação Ambiental , Hidrocarbonetos/toxicidade , Petróleo/toxicidade , Poluição por Petróleo/análise , Especificidade da Espécie
7.
ScientificWorldJournal ; 2013: 958796, 2013.
Artigo em Inglês | MEDLINE | ID: mdl-24288515

RESUMO

Two new subclasses of analytic functions of complex order are introduced. Apart from establishing coefficient bounds for these classes, we establish inclusion relationships involving (n-δ) neighborhoods of analytic functions with negative coefficients belonging to these subclasses.


Assuntos
Conceitos Matemáticos
8.
J Physiol Pharmacol ; 74(2)2023 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-37453090

RESUMO

The pressure-volume (PV) analysis is used for an accurate assessment of load-independent cardiac function and is important for the study of cardiovascular diseases and various therapeutic modalities. PV analysis is often performed on one of the ventricles, or on both ventricles but sequentially. Since both ventricles interact with each other and their functions are mutually interdependent, especially in various disease conditions such as pulmonary hypertension or heart failure, it is important to quantify the function of both ventricles at the same time. Therefore, our aim was to describe a standardized protocol for simultaneous right (RV) and left (LV) ventricle of PV analysis, including an especially controllable preload reduction manoeuver. Our second aim was to test whether simultaneous catheterization of both LV and RV is necessary for the determination of biventricular PV relationship compared to sequential measurement of both ventricles separately. In this article, we showed the feasibility and the value of simultaneous biventricular PV analysis in the measurement of contractility parameters (end-systolic pressure-volume relationship (ESPVR), ventricular pressure over time (dP/dt)max, divided by end-diastolic volume (dP/dt max-EDV)) with a comparison to the sequential measurement of the RV and LV ventricles separately. We described in detail the protocol for simultaneous biventricular PV analysis in rats using a pair of conductance-micromanometer catheters with a preload-reducing manoeuver using balloon catheter inflation in the inferior vena cava. We also described technical tips and show examples of PV loop data obtained in normotensive and hypertensive rats, with and without heart failure due to volume overload. This protocol could be useful for scientists studying hemodynamics and cardiac contractility in various models of cardiovascular diseases with a focus on biventricular differences and ventricular interdependence.


Assuntos
Doenças Cardiovasculares , Insuficiência Cardíaca , Ratos , Animais , Ventrículos do Coração , Hemodinâmica , Contração Miocárdica/fisiologia
9.
Vnitr Lek ; 58(4): 266-72, 2012 Apr.
Artigo em Tcheco | MEDLINE | ID: mdl-22559799

RESUMO

INTRODUCTION: The annual incidence of out-of-hospital cardiac arrest is around 90-190 cases per 100 000 inhabitants. The limiting factor for further prognosis of patients after out-of-hospital arrest is their neurological status. The S100B protein is mainly the nervous system cells product, its glial-specific and mostly expressed by astrocytes. It has been shown that after circulatory arrest its increased level correlates with the prognosis of patients. Work aims to determine the level of protein S100B in the group of patients with acute myocardial infarction without circulatory arrest, and compare it to the value in patients with acute myocardial infarction after out-of-hospital resuscitation. METHODS: 24 patients were evaluated after out-of-hospital resuscitation for the malignant arrhythmias during acute coronary syndrome (ACS). All patients were treated with mild therapeutic hypothermia. The control group consisted of 19 patients with ACS. The sample for the determination of S-100B was taken immediately on admission. Neurological status was evaluated according to the CPC scores (Cerebral Performance Categories) at discharge, patients were divided into 3 groups: CPC1 - good condition, CPC2 - moderate neurological disability, CPC3-5 - serious neurological impairment, coma or death. RESULTS: The values of protein S-100B fluctuated, in patients with no resuscitation, in range between 0.038 to 0.204 pg/ml. In patients after resuscitation without subsequent neurological disability (CPC 1) was range 0.077 to 0.817 pg/ml, in patients with moderate to severe neurological disability (CPC 2) was range 0.132-2.59 pg/ml, patients with severe neurological disabilities or deaths had S-100B levels from 0.70 to 8.53 pg/ml. According to ROC analysis we found the cut-off value for the S-100B. Cut-off value for probably a good neurological condition is < 0.23 pg/ml (specificity 93%, sensitivity 70%), and value testify for supposed severe neurological disability or death is > 1.64 pg/ml (specificity 95%, sensitivity 83%). CONCLUSION: Protein S-100B is one of the early and sensitive markers of severe brain damage in patients after cardiac arrest. Its early determination can help in prediction of patient neurological condition and help doctors to decide further action.


Assuntos
Reanimação Cardiopulmonar , Doenças do Sistema Nervoso Central/diagnóstico , Infarto do Miocárdio/sangue , Fatores de Crescimento Neural/sangue , Proteínas S100/sangue , Síndrome Coronariana Aguda/sangue , Síndrome Coronariana Aguda/terapia , Adulto , Idoso , Biomarcadores/sangue , Doenças do Sistema Nervoso Central/etiologia , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Infarto do Miocárdio/terapia , Prognóstico , Subunidade beta da Proteína Ligante de Cálcio S100
10.
Neuroscience ; 495: 97-114, 2022 07 15.
Artigo em Inglês | MEDLINE | ID: mdl-35643246

RESUMO

Sleep dysfunctions in epilepsy increase the burden of seizures and cognitive impairments. Seizures and certain anti-seizure drugs (ASDs) can affect sleep quality, leading to excessive daytime sleepiness and poor cognitive performance. Therefore, it is imperative to develop non-pharmacological strategies to curb epilepsy and related sleep dysfunction. Enriched environment (EE) has been demonstrated to ameliorate seizures and associated comorbidity in animal models of epilepsy. However, its effects on epilepsy-induced sleep dysfunctions and altered neural activity remain unexplored. To study the same, chronic epilepsy was induced in male Wistar rats and subjected to standard or enriched housing (6 h/day for 14 days), after which sleep/wake cycle, EEG spectral power and coherence during all vigilance states were analysed. Further, hippocampal parvalbumin-positive (PV+) interneurons were quantified to correlate the functional implications with the electrophysiological changes. Epileptic rats showed decreased rapid eye movement (REM) sleep, prolonged REM latency, and extended wake after sleep onset (WASO). Power spectrum analysis indicated an increase in delta and theta activity with a concomitant decrease in gamma activity during wake, an increase in prefrontal cortex (PFC)- Cornu ammonis (CA1) coherence, and a significant loss of hippocampal PV+ interneuron density. Exposure to EE restored REM sleep duration and latency without altering WASO in epileptic rats. EE also restored delta power during non-rapid eye movement (NREM) and theta, gamma power during wake, PFC-CA1 coherence, and PV+ interneurons density. These results further strengthen the role of EE's positive effects on brain plasticity and aid in developing non-pharmacological strategies to mitigate epilepsy-associated comorbidities.


Assuntos
Epilepsia , Transtornos do Sono-Vigília , Animais , Eletroencefalografia/métodos , Epilepsia/terapia , Masculino , Ratos , Ratos Wistar , Sono/fisiologia , Transtornos do Sono-Vigília/etiologia , Transtornos do Sono-Vigília/terapia , Vigília/fisiologia
11.
Neurochem Int ; 158: 105378, 2022 09.
Artigo em Inglês | MEDLINE | ID: mdl-35753511

RESUMO

Temporal lobe epilepsy (TLE) is the most common form of focal epilepsies. Pharmacological treatment with anti-seizure drugs (ASDs) remains the mainstay in epilepsy management. Levetiracetam (LEV) is a second-generation ASD with a novel SV2A protein target and is indicated for treating focal epilepsies. While there is considerable literature in acute models, its effect in chronic epilepsy is less clear. Particularly, its effects on neuronal excitability, synaptic plasticity, adult hippocampal neurogenesis, and histological changes in chronic epilepsy have not been evaluated thus far, which formed the basis of the present study. Six weeks post-lithium-pilocarpine-induced status epilepticus (SE), epileptic rats were injected with levetiracetam (54 mg/kg b.w. i.p.) once daily for two weeks. Following LEV treatment, Schaffer collateral - CA1 (CA3-CA1) synaptic plasticity and structural changes in hippocampal subregions CA3 and CA1 were evaluated. The number of doublecortin (DCX+) and reelin (RLN+) positive neurons was estimated. Further, mossy fiber sprouting was evaluated in DG by Timm staining, and splash test was performed to assess the anxiety-like behavior. Chronic epilepsy resulted in decreased basal synaptic transmission and increased paired-pulse facilitation without affecting post-tetanic potentiation and long-term potentiation. Moreover, chronic epilepsy decreased hippocampal subfields volume, adult hippocampal neurogenesis, and increased reelin expression and mossy fiber sprouting with increased anxiety-like behavior. LEV treatment restored basal synaptic transmission and paired-pulse facilitation ratio in CA3-CA1 synapses. LEV also restored the CA1 subfield volume in chronic epilepsy. LEV did not affect epilepsy-induced abnormal adult hippocampal neurogenesis, ectopic migration of newborn granule cells, mossy fiber sprouting in DG, and anxiety-like behavior. Our results indicate that in addition to reducing seizures, LEV has favorable effects on synaptic transmission and structural plasticity in chronic epilepsy. These findings add new dimensions to the use of LEV in chronic epilepsy and paves way for further research into its effects on cognition and affective behavior.


Assuntos
Epilepsia do Lobo Temporal , Epilepsia , Animais , Giro Denteado/patologia , Epilepsia/induzido quimicamente , Epilepsia/tratamento farmacológico , Hipocampo/patologia , Levetiracetam/farmacologia , Fibras Musgosas Hipocampais/patologia , Fibras Musgosas Hipocampais/fisiologia , Plasticidade Neuronal/fisiologia , Ratos
13.
Vnitr Lek ; 57(1): 43-51, 2011 Jan.
Artigo em Tcheco | MEDLINE | ID: mdl-21351662

RESUMO

BACKGROUND: Acute heart failure during ST elevation myocardial infarction (STEMI) makes worse prognosis. The aim of the work was to find independent factors with relationship to acute heart failure (AHF) and the early development of left ventricular dysfunction within the prospective followed patients with STEMI. METHODS: A total of 593 patients with STEMI treated by primary PCI (164 patients with AHF) were the study population. The activity of BNP and NT-ProBNP were measured at hospital admission and 24 h after MI onset. Left ventricular angiography was done before PCI; echocardiography was undertaken between the third and fifth day after MI. RESULTS: The patients with AHF had higher level of glycaemia, creatinine, uric acid, HDL-cholesterol, leukocytosis and natriuretic peptid. The total hospital mortality was 3.7%. 0.2% within the patients without AHF, 3.2%, 14.3%, resp. 63.6% within the patients with mild AHF, with pulmonary oedema, resp. with cardiogenic shock. The patients with AHF had lower ejection fraction (45.4 +/- 11.9% vs 53.0 +/- 10.3%). According to the multiple logistic regression we found higher glycaemia, age, heart rate, anterior wall MI, lower aortic pulse pressure and collaterals of infarct related artery as factors with independent relationship to AHF. Higher glycaemia, age, heart rate, anterior wall MI and lower aortic pulse pressure were found as independent factors with relationship to left ventricular dysfunction. According to ROC analysis possible cut off corresponding with AHF we suggested 29.5 mm Hg for LVEDP, 28.5 for dP/dt/P, 9.5 mmol/l for glycaemia, 50 mm Hg for aortic pulse pressure. CONCLUSIONS: Our results found the development of AHF in one third of patients with STEMI. AHF increases the risk of in-hospital mortality and the risk depends upon severity of failure. As the independent factors with relationship to development of AHF or left ventricular dysfunction we detected higher glycaemia, heart rate, anterior wall MI, age. Lower risk had patients with higher aortic pulse pressure.


Assuntos
Angioplastia Coronária com Balão , Eletrocardiografia , Insuficiência Cardíaca/etiologia , Infarto do Miocárdio/terapia , Disfunção Ventricular Esquerda/etiologia , Adulto , Idoso , Ecocardiografia , Feminino , Hemodinâmica , Mortalidade Hospitalar , Humanos , Masculino , Pessoa de Meia-Idade , Infarto do Miocárdio/complicações , Infarto do Miocárdio/diagnóstico , Infarto do Miocárdio/fisiopatologia , Peptídeo Natriurético Encefálico/sangue , Fragmentos de Peptídeos/sangue , Prognóstico , Fatores de Risco
14.
Psychoneuroendocrinology ; 124: 105066, 2021 02.
Artigo em Inglês | MEDLINE | ID: mdl-33249331

RESUMO

OBJECTIVE: Neurosteroids are known to exert diverse functions in the brain. 5α-reductase (5α-R), a rate-limiting enzyme involved in the biosynthesis of neurosteroids is inhibited by finasteride. Clinical studies suggest that administration of finasteride causes the emergence of affective symptoms and cognitive dysfunction. Modeling this in rats would provide an opportunity to understand the mechanisms. Accordingly, in the present study, we evaluated the effects of repeated finasteride administration on spatial learning and memory in the partially baited radial arm maze task (RAM) and social cognitive behavior in the social interaction test. Further, to initiate the quest to understand the mechanisms underlying the effects of finasteride, in a separate group of animals, acetylcholinesterase (AChE) activity in the frontal cortex, hippocampus, septum and striatum was estimated. METHODS: 2 months old male Wistar rats were trained to learn a partially baited radial arm maze task (four trials per day till they reach a choice accuracy of 80 %). Following this, rats were administered with either vehicle (HPßCD) or finasteride (30 or 100 mg/Kg, s.c.) for 7 days and then subjected to retention test on the eighth day. To evaluate the social cognition, finasteride was administered for 7 days, followed by social interaction test on the eighth day. All the sessions were video-recorded and analyzed using Noldus Ethovision XT™ software. Following finasteride administration, on the eighth day, rats were euthanized, and AChE activity was estimated by modified Ellman's method. RESULTS: Finasteride (100 mg/Kg, s.c.) administration decreased the percent correct choice during the retention trial of the RAM task. This was paralleled by an increase in the number of total number of errors and reference memory errors. In the social interaction test, finasteride (100 mg/Kg, s.c.) administration decreased the time spent with the rat compared to the object, implying decreased sociability and diminished social preference evidenced by similar time spent with the novel and familiar rat. Reduced AChE activity was observed in the frontal cortex, hippocampus and septum. CONCLUSION: Our study provides evidence that repeated administration of finasteride decreases social interaction and results in cognitive deficits, potentially through a cholinergic mechanism. Further studies are required to understand the exact link between the cognitive effects and the cholinergic system. A deeper probe of the current findings holds promise for the development of novel neurosteroid-based therapeutics to treat affective and cognitive disorders.


Assuntos
Disfunção Cognitiva , Neuroesteroides , Acetilcolinesterase , Animais , Colinérgicos , Disfunção Cognitiva/induzido quimicamente , Finasterida/farmacologia , Masculino , Ratos , Ratos Wistar
15.
Vnitr Lek ; 56(3): 247-50, 2010 Mar.
Artigo em Eslovaco | MEDLINE | ID: mdl-20394212

RESUMO

We present a case of a 53-year-old woman undergoing successful surgical treatment ofcoarcation restenosis after patch grafting in childhood. Despite the optimal result of the operation, normal left ventricle systolic function and coronary angiogram, majority of symptoms, such as angina and dyspnea, persist 16 months after the intervention. In further investigation, pathological values of left ventricular end-diastolic pressure (LVEDP = 30 mm Hg) and coronary flow reserve (CFR = 1.3) were confirmed, implicating recoarctation to be the unusual cause of cardiac syndrome X.


Assuntos
Coartação Aórtica/cirurgia , Coartação Aórtica/fisiopatologia , Circulação Coronária , Diástole , Eletrocardiografia , Feminino , Humanos , Pessoa de Meia-Idade , Recidiva , Reoperação , Função Ventricular Direita
16.
Vnitr Lek ; 56(5): 392-6, 2010 May.
Artigo em Tcheco | MEDLINE | ID: mdl-20578588

RESUMO

The patients after myocardial infarction with ST elevation (STEMI) are endangered by the development inception of autonomic dysfunction, decreased baroreflex sensitivity, decreased heart rate variability, and increased blood pressure variability as a result of increased sympathetic activity and/or decreased parasympathetic activity. Thanks to direct angioplasty and optimal pharmacotherapy of coronary artery disease and heart failure, we didn't found any significant changes of these parameters within a one-year follow-up, and mortality due to cardiac etiology was very low in this group. Autonomic dysfunction and negative left ventricular remodeling is related only to a small group of patients after STEMI, whose risk stratification will be difficult.


Assuntos
Sistema Nervoso Autônomo/fisiopatologia , Infarto do Miocárdio/fisiopatologia , Idoso , Barorreflexo , Pressão Sanguínea , Eletrocardiografia , Feminino , Frequência Cardíaca , Humanos , Masculino , Pessoa de Meia-Idade
17.
Vnitr Lek ; 55(12): 1135-40, 2009 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-20070029

RESUMO

INTRODUCTION: Hereditary factors connected with inflammation and fibroproliferation may play important role in restenotic process after coronary stenting. Peroxisome proliferator-activated receptors (PPAR) and retinoic X receptors (RXR) regulate the transcription of crucial genes involved in the glucose and lipid metabolism, inflammation and cell differentiation. METHODS: In our angiographic and clinical study we assessed the association of gene polymorphisms of L162V for PPAR-alpha, C161T for PPAR-gamma and A(39526)AA for RXR-alpha with the risk of restenosis and cardiac events after coronary stenting. Primary endpoint was diameter stenosis > or = 50% at follow-up angiography. Secondary endpoints were death, myocardial infarction and/or target lesion revascularisation at 12 months, and clinical restenosis. The results were adjusted for known predictors of restenosis. The genotypes were analysed by polymerase chains reaction (PCR) and restriction fragment length polymorphism (RFLP) methods. RESULTS: Control angiography was performed in 477 of 565 patients (84.4%) with following restenosis rates in genotype subgroups: CC 29.0% vs GC/GG 22.6% (p = 0.33) in L162V, CC 29.9% vs TC/TT 24.6% (p = 0.24) in C161T and A/A 26.9% vs A/AA + AA/AA 35.0% (p = 0.14) in A(39526)AA polymorphisms. The T allele ofC161T polymorphism was associated with lower frequency of clinical restenosis (p = 0.015). CONCLUSION: We could not find an association of L162V PPAR-alpha, C161T PPAR-gamma and A(39526)AA RXR-alpha gene polymorphisms with angiographic in-stent restenosis or major cardiac events. However, we found the relationship between C161T PPAR-gamma polymorphism and clinical restenosis deserving further study.


Assuntos
Reestenose Coronária/genética , Receptores Ativados por Proliferador de Peroxissomo/genética , Polimorfismo Genético , Receptor X Retinoide alfa/genética , Stents , Angiografia Coronária , Reestenose Coronária/diagnóstico por imagem , Estenose Coronária/terapia , Feminino , Genótipo , Humanos , Masculino , Pessoa de Meia-Idade , Fatores de Risco
18.
Physiol Res ; 68(4): 589-601, 2019 08 29.
Artigo em Inglês | MEDLINE | ID: mdl-31177795

RESUMO

We found recently that in Ren-2 transgenic hypertensive rats (TGR) addition of soluble epoxide hydrolase inhibitor (sEHi) to treatment with angiotensin-converting enzyme inhibitor (ACEi), surprisingly, increased the mortality due to heart failure (HF) induced by creation of the aorto-caval fistula (ACF). Since TGR exhibit sex-related differences in mortality, we examined here if such differentiation exists also in the response to the treatment with ACEi (trandolapril), alone or combined with sEHi [cis-4-[4-(3-adamantan-1-yl-ureido)cyclohexyloxy]benzoic acid, (c-AUCB)]. ACEi improved survival in males to 74 % (vs. 0 %) and in females to 65 % (vs. 32 %). ACEi and sEHi combined also improved the survival in male ACF TGR, however, it was significantly less (38 %) than after ACEi alone. In contrast, in females the combined treatment significantly improved the final survival rate (84 %). There were no significant sex-linked differences in survival rate in untreated or treated normotensive Hannover Sprague-Dawley rats. In conclusion, in HF patients with co-existing hypertension and RAS hyperactivity, the sex may co-determine the rate of HF progression, and can influence the effectiveness of the therapeutic measures applied. Therefore, in the relevant pre-clinical studies the sex-linked differences should be seriously considered. Our data indicate that TGR might be an optimal model for such studies.


Assuntos
Inibidores da Enzima Conversora de Angiotensina/administração & dosagem , Epóxido Hidrolases/antagonistas & inibidores , Hipertensão/mortalidade , Renina , Caracteres Sexuais , Fístula Vascular/mortalidade , Animais , Quimioterapia Combinada , Inibidores Enzimáticos/administração & dosagem , Epóxido Hidrolases/metabolismo , Feminino , Hipertensão/tratamento farmacológico , Hipertensão/genética , Masculino , Mortalidade/tendências , Peptidil Dipeptidase A/metabolismo , Distribuição Aleatória , Ratos , Ratos Sprague-Dawley , Ratos Transgênicos , Renina/genética , Resultado do Tratamento , Fístula Vascular/tratamento farmacológico , Fístula Vascular/genética
19.
Vnitr Lek ; 54(9): 810-6, 2008 Sep.
Artigo em Tcheco | MEDLINE | ID: mdl-18924340

RESUMO

INTRODUCTION: Coronary artery disease (CAD) affects in lower percentage even younger individuals. This paper describes group of young patients aged 40 years or less with premature manifestation of CAD, including analysis of risk factors, severity of coronary arteries affection, management and follow-up lasting up to 7 years. PATIENTS AND METHODS: There were 98 patients included retrospectively, in whom macroscopic affection of coronary arteries was diagnosed by coronary angiography within the years 2000-2007. 68 of the patients were indicated to coronary angiography urgently due to acute coronary syndrome (ACS), 44 of them due to acute myocardial infarction with ST elevations. The patients were called for further co-operation and 45 of them (45.9%) were re-examined completely and they will be observed prospectively. The results show overall good short-term prognosis of these patients and confirm importance of early invasive management and revascularisation. One-year mortality of the patients with ACS was 1.9%. 80% out of 45 completely re-examined patients have ejection fraction of left ventricle better than 50% and 84% ofthem is without any anginal symptoms. However, our results show inadequate secondary prevention in these patients. 15 patients (33%) still smoke, 20 (44%) is over-weighted. Only 22 patients (49%) had LDL-cholesterol level bellow 2.5 mmol/l and even only 15 patients (33%) had blood pressure below 130/80 mm Hg. CONCLUSIONS: Management of these basic risk factors should improve even the long-term prognosis of our patients.


Assuntos
Doença da Artéria Coronariana/diagnóstico , Adulto , Idade de Início , Angiografia Coronária , Doença da Artéria Coronariana/fisiopatologia , Doença da Artéria Coronariana/terapia , Eletrocardiografia , Feminino , Humanos , Masculino , Fatores de Risco , Volume Sistólico
20.
Vnitr Lek ; 54(9): 871-5, 2008 Sep.
Artigo em Tcheco | MEDLINE | ID: mdl-18924349

RESUMO

Acute mesentery artery embolization is a rare complication of invasive catheterizations. The incidence is unknown. In case of late diagnosis the mortality may reach up to 93%. Acute abdominal pain, vomitus, rapid and sudden bowel evacuation with or without blood are the typical symptoms of the disease. Plain X-Rays of abdomen or CT tomography may show no signs of intestinal ischaemia. The diagnostic method to choose is either spiral CT angiography or contrast angiography, respectively. The most common therapeutical approach is surgical revascularization but in selected cases it is feasible to perform local thrombolysis with a microcatheter placed directly into the artery with embolus. We report a case of a man who was admitted with an acute myocardial infarction who underwent primary angioplasty with implantation ofa bare-metal stent. After the procedure he developed severe and progressive abdominal pain as a result of acute superior mesentery artery embolization. In this patient we performed a local thrombolysis with rt-PA (alteplase) with a great technical success and immediate pain relief, with no need of surgical revision. Our approach was concordant to recommendations cited in this article.


Assuntos
Angioplastia Coronária com Balão/efeitos adversos , Embolia/tratamento farmacológico , Oclusão Vascular Mesentérica/tratamento farmacológico , Terapia Trombolítica , Embolia/etiologia , Fibrinolíticos/uso terapêutico , Humanos , Masculino , Artéria Mesentérica Superior , Oclusão Vascular Mesentérica/etiologia , Pessoa de Meia-Idade , Ativador de Plasminogênio Tecidual/uso terapêutico
SELEÇÃO DE REFERÊNCIAS
Detalhe da pesquisa