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1.
Eur Heart J ; 43(14): 1416-1424, 2022 04 06.
Artigo em Inglês | MEDLINE | ID: mdl-34910136

RESUMO

AIMS: REVEAL was the first randomized controlled trial to demonstrate that adding cholesteryl ester transfer protein inhibitor therapy to intensive statin therapy reduced the risk of major coronary events. We now report results from extended follow-up beyond the scheduled study treatment period. METHODS AND RESULTS: A total of 30 449 adults with prior atherosclerotic vascular disease were randomly allocated to anacetrapib 100 mg daily or matching placebo, in addition to open-label atorvastatin therapy. After stopping the randomly allocated treatment, 26 129 survivors entered a post-trial follow-up period, blind to their original treatment allocation. The primary outcome was first post-randomization major coronary event (i.e. coronary death, myocardial infarction, or coronary revascularization) during the in-trial and post-trial treatment periods, with analysis by intention-to-treat. Allocation to anacetrapib conferred a 9% [95% confidence interval (CI) 3-15%; P = 0.004] proportional reduction in the incidence of major coronary events during the study treatment period (median 4.1 years). During extended follow-up (median 2.2 years), there was a further 20% (95% CI 10-29%; P < 0.001) reduction. Overall, there was a 12% (95% CI 7-17%, P < 0.001) proportional reduction in major coronary events during the overall follow-up period (median 6.3 years), corresponding to a 1.8% (95% CI 1.0-2.6%) absolute reduction. There were no significant effects on non-vascular mortality, site-specific cancer, or other serious adverse events. Morbidity follow-up was obtained for 25 784 (99%) participants. CONCLUSION: The beneficial effects of anacetrapib on major coronary events increased with longer follow-up, and no adverse effects emerged on non-vascular mortality or morbidity. These findings illustrate the importance of sufficiently long treatment and follow-up duration in randomized trials of lipid-modifying agents to assess their full benefits and potential harms. TRIAL REGISTRATION: International Standard Randomized Controlled Trial Number (ISRCTN) 48678192; ClinicalTrials.gov No. NCT01252953; EudraCT No. 2010-023467-18.


Assuntos
Aterosclerose , Infarto do Miocárdio , Oxazolidinonas , Adulto , Aterosclerose/tratamento farmacológico , Atorvastatina/uso terapêutico , Método Duplo-Cego , Humanos , Infarto do Miocárdio/tratamento farmacológico , Oxazolidinonas/efeitos adversos , Resultado do Tratamento
2.
Curr Heart Fail Rep ; 19(3): 75-108, 2022 06.
Artigo em Inglês | MEDLINE | ID: mdl-35486314

RESUMO

PURPOSE OF REVIEW: In this article, we review a range of digital technologies for possible application in heart failure patients, with a focus on lessons learned. We also discuss a future model of heart failure management, as digital technologies continue to become part of standard care. RECENT FINDINGS: Digital technologies are increasingly used by healthcare professionals and those living with heart failure to support more personalised and timely shared decision-making, earlier identification of problems, and an improved experience of care. The COVID-19 pandemic has accelerated the acceptability and implementation of a range of digital technologies, including remote monitoring and health tracking, mobile health (wearable technology and smartphone-based applications), and the use of machine learning to augment data interpretation and decision-making. Much has been learned over recent decades on the challenges and opportunities of technology development, including how best to evaluate the impact of digital health interventions on health and healthcare, the human factors involved in implementation and how best to integrate dataflows into the clinical pathway. Supporting patients with heart failure as well as healthcare professionals (both with a broad range of health and digital literacy skills) is crucial to success. Access to digital technologies and the internet remains a challenge for some patients. The aim should be to identify the right technology for the right patient at the right time, in a process of co-design and co-implementation with patients.


Assuntos
COVID-19 , Insuficiência Cardíaca , Telemedicina , COVID-19/epidemiologia , Tecnologia Digital , Insuficiência Cardíaca/terapia , Humanos , Pandemias
3.
Brain Behav Immun ; 71: 133-141, 2018 07.
Artigo em Inglês | MEDLINE | ID: mdl-29627531

RESUMO

OBJECTIVE: Heart failure (HF) is a complex medical condition with a multitude of genetic and other factors being involved in the pathogenesis. Emerging evidence points to an involvement of inflammatory mechanisms at least in subgroups of patients. The same is true for depression and depressive symptoms, which have a high prevalence in HF patients and are risk factors for the development and outcomes of cardiovascular disease. METHODS: In 936 patients of the Interdisciplinary Network Heart Failure (INH) program, CRP and IL-6 protein blood levels were measured and genetic variants (single nucleotide polymorphisms) of the CRP and IL6 gene analyzed regarding their influence on mortality. RESULTS: Less common recessive genotypes of two single nucleotide polymorphisms in the CRP gene (rs1800947 and rs11265263) were associated with significantly higher mortality risk (p < 0.006), higher CRP levels (p = 0.029, p = 0.006) and increased depressive symptoms in the PHQ-9 (p = 0.005, p = 0.003). Variants in the IL-6 gene were not associated with mortality. CONCLUSION: Our results hint towards an association of less common CRP genetic variants with increased mortality risk, depressive symptoms and peripheral CRP levels in this population of HF patients thereby suggesting a possible role of the inflammatory system as link between poor prognosis in HF and depressive symptoms.


Assuntos
Proteína C-Reativa/genética , Transtorno Depressivo/genética , Insuficiência Cardíaca/genética , Idoso , Proteína C-Reativa/metabolismo , Proteína C-Reativa/fisiologia , Doença Crônica , Depressão/sangue , Depressão/genética , Depressão/fisiopatologia , Transtorno Depressivo/sangue , Transtorno Depressivo/fisiopatologia , Feminino , Predisposição Genética para Doença/genética , Variação Genética/genética , Genótipo , Insuficiência Cardíaca/mortalidade , Insuficiência Cardíaca/psicologia , Humanos , Interleucina-6/sangue , Interleucina-6/genética , Interleucina-6/fisiologia , Masculino , Pessoa de Meia-Idade , Polimorfismo de Nucleotídeo Único/genética , Fatores de Risco
4.
Scand J Rheumatol ; 47(2): 102-109, 2018 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-28812405

RESUMO

OBJECTIVES: Patients with rheumatic disease (RD) have an increased mortality risk compared with the general population, mainly due to cardiovascular disease (CVD). We aimed to identify patients at high risk of CVD and mortality by comparing three screening tools suitable for clinical practice. METHOD: In this prospective, single-centre study, consecutive patients with rheumatoid arthritis (RA), systemic autoimmune disease (SAI), or spondyloarthritides (SpA) including psoriatic arthritis underwent a comprehensive cardiovascular risk assessment. Patients were predefined as being at high risk for cardiovascular events or death if any of the following were present: European Systematic COronary Risk Evaluation (SCORE) ≥ 3%, N-terminal pro-brain natriuretic peptide (NT-proBNP) ≥ 200 pg/mL, or any pathological electrocardiogram pattern. RESULTS: The patient population (n = 764) comprised 352 patients with RA, 260 with SAI, and 152 with SpA. After a median follow-up of 5.2 years, 6.0% of RD patients had died (7.0%, 7.2%, and 1.4% of patients in the RA, SAI, and SpA subgroups), and 5.0% had experienced a cardiovascular event (5.0%, 6.4%, and 2.8%, respectively). For all RD patients and the RA and SAI subgroups, NT-proBNP ≥ 200 pg/mL and SCORE ≥ 3% identified patients with a 3.5-5-fold increased risk of all-cause death and cardiovascular events. Electrocardiogram pathology was associated with increased mortality risk, but not with cardiovascular events. CONCLUSION: NT-proBNP ≥ 200 pg/mL or SCORE ≥ 3% identifies RA and SAI patients with increased risk of cardiovascular events and death. Both tools are suitable as easy screening tools in daily practice to identify patients at risk for further diagnostics and closer long-term follow-up.


Assuntos
Doenças Cardiovasculares/diagnóstico , Programas de Rastreamento/métodos , Doenças Reumáticas/mortalidade , Adulto , Idoso , Doenças Cardiovasculares/epidemiologia , Doenças Cardiovasculares/etiologia , Estudos de Coortes , Feminino , Seguimentos , Humanos , Masculino , Pessoa de Meia-Idade , Peptídeo Natriurético Encefálico , Fragmentos de Peptídeos , Estudos Prospectivos , Doenças Reumáticas/complicações , Medição de Risco , Fatores de Risco , Análise de Sobrevida
5.
Internist (Berl) ; 59(10): 1041-1053, 2018 Oct.
Artigo em Alemão | MEDLINE | ID: mdl-30238134

RESUMO

Heart failure (HF) is an emerging epidemic associated with significant morbidity and mortality, impaired quality of life and high healthcare costs. Despite major advances in pharmacological and device-based therapies, mortality and morbidity have remained high after an index hospitalization for acute cardiac decompensation (ACD). Randomized trials evaluating various forms of noninvasive telemonitoring failed to improve rehospitalization rates in such patients, possibly due to lack of sensitivity of clinical signs and symptoms as early indicators of HF. Among different implantable monitoring devices, wireless remote monitoring of the pulmonary artery pressure (PAP) with the CardioMEMS™ sensor (Abbott, Sylmar, CA, USA) has been shown to be safe and clinically effective in the USA. The patients showed substantial reductions in hospital admissions for ACD, irrespective of left ventricular pump function, because PAP-guided HF management facilitates timely recognition of incipient ACD and appropriate modification of medical treatment before hospitalization becomes unavoidable. These encouraging results have also stimulated evaluation of this novel technology outside the USA. Studies are also underway in Europe and European HF guidelines recommend considering implantation of a CardioMEMS™ sensor in high-risk patients (class IIb-B). More technologically refined implantable hemodynamic monitoring systems allowing, for example, left atrial pressure measurements, are under development. Promising novel approaches to using information from such devices include continuous hemodynamic monitoring and patient self-management based on the pressure information. Thus, pressure-guided HF management is likely to further expand in the future and may help improve clinical outcomes also in high-risk HF populations.


Assuntos
Monitorização Ambulatorial da Pressão Arterial/instrumentação , Insuficiência Cardíaca/fisiopatologia , Artéria Pulmonar/fisiopatologia , Pressão Propulsora Pulmonar/fisiologia , Telemedicina , Determinação da Pressão Arterial , Europa (Continente) , Humanos , Admissão do Paciente , Qualidade de Vida , Ensaios Clínicos Controlados Aleatórios como Assunto
6.
Herz ; 42(1): 107-120, 2017 Feb.
Artigo em Alemão | MEDLINE | ID: mdl-28105480

RESUMO

Heart failure remains a frequent cause of death and is the leading reason for hospitalization in Germany although therapeutic options have significantly increased over the past years particularly in heart failure with reduced ejection fraction. Clinical symptoms are usually preceded by cardiac remodeling, which was originally defined only by left ventricular dilatation and depressed function but is also associated with typical cellular and molecular processes. Healing after acute myocardial infarction is characterized by inflammation, cellular migration and scar formation. Cardiac remodeling is accompanied by adaptive changes of the peripheral cardiovascular system. Since prevention is the primary goal, rapid diagnosis and treatment of myocardial infarction are mandatory. Early reperfusion therapy limits infarct size and enables the best possible preservation of left ventricular function. Standard pharmacotherapy includes angiotensin-converting enzyme inhibitors, angiotensin-1-receptor blockers and beta blockers. In addition, mineralocorticoid receptor antagonists have proven beneficial. Compounds specifically targeting infarct healing processes are currently under development.


Assuntos
Infarto do Miocárdio/diagnóstico , Infarto do Miocárdio/terapia , Disfunção Ventricular Esquerda/diagnóstico , Disfunção Ventricular Esquerda/terapia , Remodelação Ventricular , Medicina Baseada em Evidências , Humanos , Infarto do Miocárdio/fisiopatologia , Resultado do Tratamento , Disfunção Ventricular Esquerda/fisiopatologia
8.
Herz ; 41(8): 741-754, 2016 Dec.
Artigo em Alemão | MEDLINE | ID: mdl-27752713

RESUMO

Heart failure and depression are widespread diseases and of particular clinical and economic relevance. Compared with the general population depression is up to 5­times more common in patients with heart failure, with adverse effects on morbidity, mortality, quality of life and treatment costs. Depressive symptoms overlap with those of heart failure which renders diagnosis difficult. Simple screening tools, e. g. the two-item patient health questionnaire, help to recognize depression in the clinical routine. To date, there is no evidence that antidepressant pharmacotherapy improves mood and clinical outcomes in patients with heart failure and comorbid depression and antidepressant pharmacotherapy remains to be decided on a case by case basis; however, physical training, cognitive behavioral therapy and multidisciplinary comprehensive disease management improved symptoms and/or prognosis in a limited number of randomized studies.


Assuntos
Depressão/diagnóstico , Depressão/terapia , Erros de Diagnóstico/prevenção & controle , Insuficiência Cardíaca/diagnóstico , Insuficiência Cardíaca/terapia , Antidepressivos/uso terapêutico , Causalidade , Terapia Cognitivo-Comportamental/métodos , Terapia Cognitivo-Comportamental/estatística & dados numéricos , Comorbidade , Depressão/epidemiologia , Diagnóstico Diferencial , Alemanha/epidemiologia , Insuficiência Cardíaca/epidemiologia , Humanos , Prevalência , Fatores de Risco , Resultado do Tratamento
9.
Internist (Berl) ; 55(6): 676-86, 2014 Jun.
Artigo em Alemão | MEDLINE | ID: mdl-24806269

RESUMO

The rising prevalence and increasing disease-related costs render chronic heart failure a rapidly growing socioeconomic challenge. The concerted action of guideline-adjusted therapy and holistic patient care is essential to achieve improvements in mortality, morbidity, functional status and quality of life of patients with symptomatic heart failure. Holistic care strategies comprise consideration of comorbidities and individual needs, lifestyle recommendations and multidisciplinary management programs for high-risk symptomatic patients in addition to basic medication and surgical therapies. For optimal patient care and coaching, seamless interaction is required between in-hospital treatment and outpatient facilities. Moreover, the palliative needs of heart failure patients need to be considered, a topic that is currently not receiving enough attention.


Assuntos
Insuficiência Cardíaca/psicologia , Insuficiência Cardíaca/terapia , Saúde Holística , Cuidados Paliativos/métodos , Cuidados Paliativos/psicologia , Doença Crônica , Medicina Baseada em Evidências , Humanos , Resultado do Tratamento
10.
Mediators Inflamm ; 2013: 716902, 2013.
Artigo em Inglês | MEDLINE | ID: mdl-24489446

RESUMO

INTRODUCTION: Experimental data indicates an important role of the innate immune system in cardiac remodeling and heart failure (HF). Complement is a central effector pathway of the innate immune system. Animals lacking parts of the complement system are protected from adverse remodeling. Based on these data, we hypothesized that peripheral complement levels could be a good marker for adverse remodeling and prognosis in patients with HF. METHODS AND RESULTS: Since complement activation converges on the complement factor C3, we measured serum C3c, a stable C3-conversion product, in 197 patients with stable systolic HF. Subgroups with normal and elevated C3c levels were compared. C3c levels were elevated in 17% of the cohort. Patients with elevated C3c levels exhibited a trend to better survival, slightly higher LVEF, and lower NTpro-BNP values in comparison to patients with normal C3c values. No differences were found regarding NYHA functional class. Significantly more patients with elevated C3c had preexisting diabetes. The prevalence of CAD, arterial hypertension, and atrial fibrillation was not increased in patients with elevated C3c. CONCLUSION: Elevated C3c levels are associated with less adverse remodeling and improved survival in patients with stable systolic heart failure.


Assuntos
Biomarcadores/sangue , Complemento C3c/metabolismo , Regulação da Expressão Gênica , Insuficiência Cardíaca/sangue , Adulto , Idoso , Idoso de 80 Anos ou mais , Proteína C-Reativa/metabolismo , Eletrocardiografia , Feminino , Seguimentos , Insuficiência Cardíaca/mortalidade , Humanos , Masculino , Pessoa de Meia-Idade , Peptídeo Natriurético Encefálico/metabolismo , Fragmentos de Peptídeos/metabolismo , Sístole , Resultado do Tratamento , Função Ventricular Esquerda , Remodelação Ventricular
11.
Herz ; 38(6): 587-96, 2013 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-23900388

RESUMO

Heart failure (HF) is highly prevalent and associated with adverse outcomes and high costs. Compared with the general population, depression is up to five times more common in HF patients. Comorbid depression increases morbidity and mortality risk and health-care expenditures even further and decreases quality of life. Possible, often interrelated, mediators of these effects include biological, behavioral, and psychosocial factors. Screening instruments such as the self-administered PHQ-2 facilitate detection of patients at risk. Although antidepressants may improve psychological well-being, no positive effects on hard clinical endpoints have been demonstrated to date.


Assuntos
Depressão/diagnóstico , Depressão/epidemiologia , Insuficiência Cardíaca/diagnóstico , Insuficiência Cardíaca/epidemiologia , Antidepressivos/uso terapêutico , Comorbidade , Depressão/terapia , Medicina Baseada em Evidências , Insuficiência Cardíaca/terapia , Humanos , Prevalência , Fatores de Risco
12.
Minerva Ginecol ; 64(5): 361-73, 2012 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-23018476

RESUMO

Peripartum cardiomyopathy (PPCM) is a rare disease of the heart muscle that affects women with previously unknown heart diseases during pregnancy or in the first months after delivery. Cardinal symptoms are dyspnoea and fluid retention. However, tachycardia, cardiogenic thromboembolism and other clinical signs of cardiac dysfunction may also herald this uncommon cause of heart failure. The estimated incidence of PPCM shows large regional variations: in Europe and the United States it is between 1:2000 and 1:4000. The markedly higher incidence rates observed in Haitian or South African women (up to 1:300) suggest that genetic or environmental factors may play a pathogenetic role. However, the underlying aetiology of PPCM still is unclear. Besides genetic susceptibility an abnormal autoimmune response against cardiac tissue components, viral infections or an irregular activity of cathepsin D generating a potentially cardio-toxic splice variant of prolactin have been discussed. New therapeutic strategies as immune modulation or prolactin inhibition were therefore suggested, but are not yet established. Treatment strategies focus on the standard therapies for heart failure and its complications. During pregnancy heart failure therapy is limited to substances without fetotoxic effects. But even with optimal heart failure therapy the course of the disease exhibits large variations ranging from full recovery to deterioration of heart function and even early cardiac death. This review cumulates the current knowledge on PPCM and aims to raise awareness for this rare and potentially life-threatening disorder amongst all medical professionals involved in the care for pregnant women.


Assuntos
Cardiomiopatias , Transtornos Puerperais , Cardiomiopatias/diagnóstico , Cardiomiopatias/etiologia , Feminino , Insuficiência Cardíaca/tratamento farmacológico , Humanos , Gravidez , Complicações Cardiovasculares na Gravidez/tratamento farmacológico , Prognóstico , Transtornos Puerperais/diagnóstico , Transtornos Puerperais/etiologia
13.
Internist (Berl) ; 50(12): 1325-36, 2009 Dec.
Artigo em Alemão | MEDLINE | ID: mdl-19921109

RESUMO

Rising prevalence and disease-related costs render chronic heart failure a rapidly growing socioeconomic challenge. Guideline-adjusted diagnosis and appropriate therapy are successful in improving mortality, morbidity, functional status and quality of life of patients with chronic left ventricular failure. Corresponding state-of-art recommendations were recently published in the updated European and American treatment guidelines. They determine a stepwise escalation of pharmacological and surgical treatment measures according to increasing disease severity. Still, the complexity of the heart failure syndrome demands to tailor diagnostic procedures and therapy to the patients' individual needs and circumstances.


Assuntos
Insuficiência Cardíaca/diagnóstico , Insuficiência Cardíaca/prevenção & controle , Disfunção Ventricular Esquerda/complicações , Disfunção Ventricular Esquerda/diagnóstico , Cardiologia/normas , Humanos , Internacionalidade , Guias de Prática Clínica como Assunto
14.
Internist (Berl) ; 50(2): 225-9, 2009 Feb.
Artigo em Alemão | MEDLINE | ID: mdl-19183921

RESUMO

Cardiac amyloidosis represents a prognostically relevant comorbidity in multiple myeloma. We report the case of a patient in whom severe heart failure symptoms as a consequence of cardiac AL-amyloidosis resolved after tandem high-dose melphalan therapy followed by autologous blood-stem cell transplantation. Partial regression of cardiac amyloid deposits and improvement of cardiac function were objectified.


Assuntos
Insuficiência Cardíaca/diagnóstico , Insuficiência Cardíaca/etiologia , Mieloma Múltiplo/complicações , Mieloma Múltiplo/diagnóstico , Insuficiência Cardíaca/prevenção & controle , Humanos , Masculino , Pessoa de Meia-Idade , Mieloma Múltiplo/terapia
15.
Eur J Heart Fail ; 10(4): 388-95, 2008 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-18343723

RESUMO

BACKGROUND: Matrix metalloproteinases (MMP) and their tissue inhibitors (TIMP) are involved in cardiac remodelling. The prognostic utility of TIMP is unknown in chronic heart failure (CHF). AIMS: We investigated the association of plasma levels of soluble MMP-9 and TIMP-1 with clinical, laboratory and echocardiographic parameters and estimated their prognostic value in the prediction of all-cause death. METHODS: MMP-9, TIMP-1, tumour necrosis factor-alpha, and amino-terminal pro-brain natriuretic peptide were measured in 249 consecutively enrolled CHF patients and 74 healthy individuals. RESULTS: After adjustment for age, sex and creatinine, levels of TIMP-1 (1640 vs. 735 ng/ml, P<0.001) but not MMP-9 were elevated in CHF patients compared to controls. During a median follow-up period of 2.5 years, 66 patients (27%) died. In multivariable Cox regression models TIMP-1 but not MMP-9 emerged as an independent predictor of all-cause death (hazard ratio per tertile, 3.5; 95% confidence interval [CI], 2.2-5.1). In addition to the full set of univariately predictive clinical and serological markers, information on TIMP-1 significantly increased the area under the receiver operating characteristic curve from 0.77 (95% CI, 0.71-0.84) to 0.87 (95% CI, 0.82-0.92). CONCLUSION: In stable CHF patients, TIMP-1 but not MMP-9 is of independent and incremental value regarding the prediction of all-cause death.


Assuntos
Insuficiência Cardíaca/sangue , Insuficiência Cardíaca/mortalidade , Metaloproteinase 9 da Matriz/sangue , Inibidor Tecidual de Metaloproteinase-1/sangue , Idoso , Biomarcadores/sangue , Baixo Débito Cardíaco/sangue , Baixo Débito Cardíaco/diagnóstico , Baixo Débito Cardíaco/mortalidade , Causas de Morte , Ecocardiografia , Feminino , Insuficiência Cardíaca/diagnóstico , Humanos , Masculino , Pessoa de Meia-Idade , Valor Preditivo dos Testes , Prognóstico , Modelos de Riscos Proporcionais , Estudos Prospectivos , Valores de Referência , Fator de Necrose Tumoral alfa/sangue
16.
J Hum Hypertens ; 22(2): 138-40, 2008 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-17823597

RESUMO

A total of 52 pharmacologically untreated subjects with essential hypertension were randomly allocated to either 8 weeks of contemplative meditation combined with breathing techniques (CMBT) or no intervention in this observer-blind controlled pilot trial. CMBT induced clinically relevant and consistent decreases in heart rate, systolic and diastolic blood pressure if measured during office readings, 24-h ambulatory monitoring and mental stress test. Longer-term studies should evaluate CMBT as an antihypertensive strategy.


Assuntos
Pressão Sanguínea/fisiologia , Hipertensão/terapia , Meditação , Estresse Psicológico , Monitorização Ambulatorial da Pressão Arterial , Frequência Cardíaca/fisiologia , Humanos , Hipertensão/etiologia , Meditação/métodos , Projetos Piloto
17.
Br J Pharmacol ; 150(2): 130-5, 2007 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-17179956

RESUMO

BACKGROUND AND PURPOSE: Mitogen-activated protein kinases (MAPK) are centrally involved in several mechanisms important for heart failure such as apoptosis, activation of inflammatory responses and cell proliferation. We therefore evaluated the effect of the selective p38 MAPK inhibitor SB 239063 on progression of left ventricular remodelling after myocardial infarction (MI) in rats. EXPERIMENTAL APPROACH: Rats were treated for 9 weeks with placebo or SB 239063 by gavage (15 mg kg(-1)) twice daily starting 7 days after ligation of the left anterior descending artery. Serial transthoracic echocardiography was performed at days 7, 36 and 70. KEY RESULTS: Over the 9 weeks, mortality was not different between the groups. On echocardiography, animals after myocardial infarction exhibited significant left ventricular dilatation as expected (week 10, end-systolic diameter, placebo sham 5.21+/- 0.34 vs. placebo MI 8.44+/- 0.57 mm). However, there was no difference between placebo and SB 239063-treated rats (week 10, end-systolic diameter, SB MI 7.76+/- 0.74 mm, not significantly different from placebo MI). Haemodynamics changed accordingly. Moreover, SB 239063 had no effect on left ventricular hypertrophy. Treatment with SB 239063 significantly reduced cytokine expression of tumour necrosis factor and interleukin-1beta after myocardial infarction. However, collagen content was not influenced by the treatment. CONCLUSION: Despite a reduction of inflammation, treatment with the p38 inhibitor SB 239063 does not affect cardiac remodelling and cardiac function when treatment is started 7 days after myocardial infarction.


Assuntos
Remodelação Ventricular , Proteínas Quinases p38 Ativadas por Mitógeno/fisiologia , Animais , Imidazóis/farmacologia , Inflamação/prevenção & controle , Masculino , Infarto do Miocárdio/diagnóstico por imagem , Infarto do Miocárdio/mortalidade , Infarto do Miocárdio/fisiopatologia , Pirimidinas/farmacologia , Ratos , Ratos Wistar , Ultrassonografia , Proteínas Quinases p38 Ativadas por Mitógeno/antagonistas & inibidores
18.
Circulation ; 102(11): 1315-22, 2000 Sep 12.
Artigo em Inglês | MEDLINE | ID: mdl-10982549

RESUMO

BACKGROUND: Chemokines are potent proinflammatory and immune modulators. Increased expression of chemokines, eg, monocyte chemoattractant protein-1 (MCP-1), has recently been described in clinical and experimental heart failure. The present report is aimed at exploring the expression, localization, and binding site regulation of MCP-1, a member of the C-C chemokine family, in a rat model of volume-overload congestive heart failure (CHF). METHODS AND RESULTS: An aortocaval fistula was surgically created between the abdominal aorta and inferior vena cava. Rats with CHF were further subdivided into compensated and decompensated subgroups. Northern blot analysis and real-time quantitative polymerase chain reaction demonstrated upregulation of MCP-1 mRNA expression correlating with the severity of CHF (288+/-22, 502+/-62, and 826+/-138 copies/ng total RNA for sham, compensated, and decompensated animals, respectively; n=5, P:<0.05). MCP-1 protein was localized by immunohistochemistry in cardiomyocytes, vascular endothelium and smooth muscle cells, infiltrating leukocytes, and interstitial fibroblasts, and its intensity increased with severity of CHF. In addition, rats with CHF displayed a significant decrease of (125)I-labeled MCP-1 binding sites to myocardium-derived membranes (384.3+/-57.0, 181.3+/-8.8, and 123.3+/-14.1 fmol/mg protein for sham, compensated, and decompensated animals, respectively). CONCLUSIONS: Volume-overload CHF in rats is associated with alterations in the expression, immunohistochemical localization, and receptor binding of the MCP-1 chemokine in the myocardium. These changes were more pronounced in rats with decompensated CHF. The data suggest that activation of the MCP-1 system may contribute to the progressive cardiac decompensation and development of CHF in rats with aortocaval fistula.


Assuntos
Quimiocina CCL2/metabolismo , Insuficiência Cardíaca/metabolismo , Animais , Ligação Competitiva , Northern Blotting , Insuficiência Cardíaca/diagnóstico por imagem , Imuno-Histoquímica , Técnicas In Vitro , Masculino , Miocárdio/metabolismo , Reação em Cadeia da Polimerase , RNA Mensageiro/metabolismo , Ensaio Radioligante , Ratos , Ratos Wistar , Ultrassonografia , Regulação para Cima
19.
Circulation ; 100(5): 509-15, 1999 Aug 03.
Artigo em Inglês | MEDLINE | ID: mdl-10430765

RESUMO

BACKGROUND: Routine methods for surveillance of cardiac allograft vasculopathy (CAV) are coronary angiography and intravascular ultrasound (IVUS). This study analyzed the diagnostic and prognostic value of dobutamine stress echocardiography (DSE) for noninvasive assessment of CAV. METHODS AND RESULTS: In 109 heart transplant recipients, 333 DSEs were compared with 285 coronary angiograms and 199 IVUS analyses. Studies were repeated after 1, 2, 3, 4, and >/=5 years in 88, 74, 37, 18, and 7 patients, respectively. Resting 2D echocardiography detected CAV defined by IVUS and angiography with a sensitivity of 57% (specificity 88%). DSE increased the sensitivity to 72% (P=0.002). M-mode analysis increased the sensitivity of 2D rest and stress analysis (P=0.001, 0.004). Cardiac events occurred after 1.9% of normal stress tests by 2D analysis (combined 2D and M-mode: 0%), compared with 6.3% (3.8%) of normal resting studies. Worsening of serial DSE indicated an increased risk of events compared with no deterioration (relative risk 7.26, P=0.0014). Serial deterioration detected by stress only was associated with a higher risk of events than changes evident from resting studies (relative risk 3.06, P=0.0374). CONCLUSIONS: DSE identifies patients at risk for events and facilitates monitoring of CAV. A normal DSE predicts an uneventful clinical course and justifies postponement of invasive studies. The prognostic value of DSE is comparable to that of IVUS and angiography.


Assuntos
Angiografia Coronária , Doença das Coronárias/diagnóstico , Doença das Coronárias/etiologia , Ecocardiografia , Transplante de Coração , Ultrassonografia de Intervenção , Agonistas Adrenérgicos beta , Adulto , Fatores de Confusão Epidemiológicos , Doença das Coronárias/diagnóstico por imagem , Progressão da Doença , Dobutamina , Ecocardiografia/métodos , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Valor Preditivo dos Testes , Prognóstico , Estudos Prospectivos , Risco , Transplante Homólogo , Ultrassonografia de Intervenção/métodos
20.
Circulation ; 104(11): 1292-8, 2001 Sep 11.
Artigo em Inglês | MEDLINE | ID: mdl-11551882

RESUMO

BACKGROUND: Numerous pathological mediators of cardiac hypertrophy (eg, neurohormones, cytokines, and stretch) have been shown to activate p38 MAPK. The purpose of the present study was to examine p38 MAPK activation and the effects of its long-term inhibition in a model of hypertensive cardiac hypertrophy/dysfunction and end-organ damage. METHODS AND RESULTS: In spontaneously hypertensive stroke-prone (SP) rats receiving a high-salt/high-fat diet (SFD), myocardial p38 MAPK was activated persistently during the development of cardiac hypertrophy and inactivated during decompensation. Long-term oral treatment of SFD-SP rats with a selective p38 MAPK inhibitor (SB239063) significantly enhanced survival over an 18-week period compared with the untreated group (100% versus 50%). Periodic echocardiographic analysis revealed a significant reduction in LV hypertrophy and dysfunction in the SB239063-treatment groups. Little or no difference in blood pressure was noted in the treatment or vehicle groups. Basal and stimulated (lipopolysaccharide) plasma tumor necrosis factor-alpha concentrations were reduced in the SB239063-treatment groups. In vitro vasoreactivity studies demonstrated a significant preservation of endothelium-dependent relaxation in animals treated with the p38 MAPK inhibitor without effects on contraction or NO-mediated vasorelaxation. Proteinuria and the incidence of stroke (53% versus 7%) were also reduced significantly in the SB239063-treated groups. CONCLUSIONS: These results demonstrate a crucial role for p38 MAPK in hypertensive cardiac hypertrophy and end-organ damage. Interrupting its function with a specific p38 MAPK inhibitor halts clinical deterioration.


Assuntos
Cardiomegalia/fisiopatologia , Hipertensão/fisiopatologia , Proteínas Quinases Ativadas por Mitógeno/metabolismo , Animais , Cardiomegalia/enzimologia , Cardiomegalia/mortalidade , Modelos Animais de Doenças , Relação Dose-Resposta a Droga , Ecocardiografia , Endotélio Vascular/efeitos dos fármacos , Endotélio Vascular/fisiopatologia , Ativação Enzimática , Coração/efeitos dos fármacos , Coração/fisiopatologia , Hemodinâmica/efeitos dos fármacos , Imidazóis/farmacologia , Rim/efeitos dos fármacos , Rim/fisiopatologia , Lipopolissacarídeos/farmacologia , Masculino , Proteínas Quinases Ativadas por Mitógeno/antagonistas & inibidores , Miocárdio/metabolismo , Miocárdio/patologia , Fosforilação , Proteinúria/prevenção & controle , Proteinúria/urina , Pirimidinas/farmacologia , Ratos , Ratos Endogâmicos SHR , Ratos Endogâmicos WKY , Acidente Vascular Cerebral/patologia , Acidente Vascular Cerebral/prevenção & controle , Taxa de Sobrevida , Fatores de Tempo , Fator de Necrose Tumoral alfa/efeitos dos fármacos , Fator de Necrose Tumoral alfa/metabolismo , Vasodilatação/efeitos dos fármacos , Proteínas Quinases p38 Ativadas por Mitógeno
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