Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 20
Filtrar
1.
Expert Rev Pharmacoecon Outcomes Res ; 22(3): 429-435, 2022 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-34569402

RESUMO

BACKGROUND: Stroke is aleading cause of death and disability, with atrial fibrillation (AF) being among key risk factors and AF-related stroke inflicting significant burden on healthcare systems and society. The present study was undertaken for estimating the total annual socioeconomic burden of AF-related stroke in Greece and identifying the key cost contributors. RESEARCH DESIGN AND METHODS: A cost-of-illness model was developed for estimating the total annual economic burden of AF-related stroke in Greece, from asocietal perspective (year 2018). Atargeted literature review and an advisory board consisting of key experts in the management of AF and AF-related stroke were performed for collecting local resource use and epidemiological data. RESULTS: The total annual socioeconomic burden of AF-related stroke was estimated at €175million, in 2018. Direct and indirect costs accounted for 59% and 41%, respectively. Main contributors were informal care (21.1%), patients' productivity losses (19.7%) and hospitalizations (15.0%), accounting for more than half of the total costs of AF-related stroke events.Conclusion: A F-related stroke imposes asignificant socioeconomic burden in Greece. Despite results relying on estimations, it seems that ensuring efficient reallocation of resources in appropriate prevention and early intervention strategies could decrease AF-related stroke's burden but also enhance healthcare systems' efficiency. ABBREVIATIONS: AF=atrial fibrillation.


Assuntos
Fibrilação Atrial , Acidente Vascular Cerebral , Anticoagulantes/efeitos adversos , Fibrilação Atrial/epidemiologia , Fibrilação Atrial/terapia , Estresse Financeiro , Grécia/epidemiologia , Hospitalização , Humanos , Acidente Vascular Cerebral/epidemiologia , Acidente Vascular Cerebral/etiologia
2.
J Intensive Care Med ; 36(7): 775-782, 2021 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-32274959

RESUMO

BACKGROUND: Studies conducted in coronary intensive care units (CICUs) have demonstrated that tachyarrhythmias are associated with increased mortality after acute coronary syndromes (ACSs). However, the data for tachyarrhythmias occurred in CICUs due to a variety of cardiovascular disorders are limited. METHODS: We conducted a single-center prospective observational study, which included consecutive CICU patients (January 1, 2014 to May 31, 2018). We recorded the ventricular arrhythmias (VAs), supraventricular tachycardias (SVTs), and days of CICU hospitalization. The patients were followed up for 6 months after CICU discharge. RESULTS: A total of 943 patients (age: 66.37 ±15.4 years; 673 males [71.4%]) were included. Patients with tachyarrhythmias had higher in-CICU mortality (8.0% vs 4.1%, P = .029, odds ratio [OR]: 2.04, 95% confidence interval [CI]: 1.08-3.86) and higher 6-month all-cause mortality (12.8% vs 6.1%, P = .002, OR: 2.27, 95% CI: 1.35-3.83) than those who did not develop tachyarrhythmias. Ventricular arrhythmias was significantly associated with higher all-cause mortality than no tachyarrhythmia (15.4% vs 6.1%; P = .001) or SVTs (15.4% vs 7.0%; P = .001). The mean duration of hospitalization for the patients with tachyarrhythmias was 3.89 ± 4.90 days, while for the patients without was 2.79 ± 3.31 days (P < .001). Patients without ACS had higher short- and long-term mortality compared to patients with ACS (9.2% vs 2.9%, P < .001 and 12.9% vs 4.9%, P < .001). CONCLUSIONS: Tachyarrhythmias were associated with prolonged CICU hospitalization, while non-ACS cardiovascular disorders and the occurrence of VAs were associated with increased short- and long-term mortality.


Assuntos
Síndrome Coronariana Aguda , Unidades de Terapia Intensiva , Síndrome Coronariana Aguda/complicações , Síndrome Coronariana Aguda/terapia , Idoso , Hospitalização , Humanos , Masculino , Prognóstico , Estudos Retrospectivos , Taquicardia
3.
Am J Cardiol ; 107(1): 59-63, 2011 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-21146687

RESUMO

Monocyte chemoattractant protein-1 (MCP-1) and peroxisome proliferator-activated receptor-γ (PPAR-γ) play a significant role in monocyte activation, vascular inflammation, and atherogenesis. Angiotensin receptor blockers and calcium channel blockers are antihypertensive drugs with established efficacy and a favorable safety profile. We investigated the effect of telmisartan--an angiotensin receptor blocker with PPAR-γ agonist activity--and amlodipine on the activation state of peripheral blood monocytes with respect to MCP-1 and PPAR-γ gene expression in hypertensives. We recruited 31 previously untreated patients with essential hypertension who were randomly assigned to receive treatment with telmisartan (n = 16) or amlodipine (n = 15). Blood samples were taken before and 3 months after therapy initiation. Mononuclear cells were isolated and mRNAs of MCP-1 and PPAR-γ were estimated by real-time quantitative reverse transcription-polymerase chain reaction each time. The 2 treatments decreased all blood pressure components significantly (p <0.001). In contrast, in the amlodipine group, MCP-1 gene expression was significantly downregulated after treatment with telmisartan (from 21.4 ± 20.5 to 8.1 ± 6.5, p = 0.009), whereas the amlodipine group did not show any significant change (12.5 ± 8.5 vs 17.6 ± 16.4, p = NS). In addition, PPAR-γ mRNA levels showed a significant increase in telmisartan-treated patients (from 20 ± 18.5 to 42.6 ± 36, p = 0.006) and no significant alterations in the amlodipine group (from 29.6 ± 42.5 to 24.2 ± 27.7, p = NS). In conclusion, treatment with telmisartan results in a significant attenuation of MCP-1 gene expression and an increase of PPAR-γ gene expression in peripheral monocytes in patients with essential hypertension. Our findings may provide new insights into the cardiovascular protection of telmisartan in hypertensives.


Assuntos
Anlodipino/farmacologia , Anti-Hipertensivos/farmacologia , Benzimidazóis/farmacologia , Benzoatos/farmacologia , Quimiocina CCL2/genética , Hipertensão/tratamento farmacológico , Monócitos/efeitos dos fármacos , PPAR gama/genética , Anlodipino/uso terapêutico , Anti-Hipertensivos/uso terapêutico , Benzimidazóis/uso terapêutico , Benzoatos/uso terapêutico , Quimiocina CCL2/efeitos dos fármacos , Feminino , Expressão Gênica/efeitos dos fármacos , Humanos , Masculino , Pessoa de Meia-Idade , Índice de Gravidade de Doença , Telmisartan
4.
J Am Soc Echocardiogr ; 23(12): 1336.e1-4, 2010 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-20591617

RESUMO

We describe two relatively asymptomatic cases diagnosed with the newly recognized unclassified cardiomyopathy, isolated left ventricular apical hypoplasia. The disease has been described mainly in cardiac magnetic resonance, whereas this study presents the echocardiographic characteristics of this new cardiomyopathy.


Assuntos
Ecocardiografia Tridimensional , Ecocardiografia , Ventrículos do Coração/anormalidades , Ventrículos do Coração/diagnóstico por imagem , Adulto , Feminino , Seguimentos , Humanos , Lactente , Músculos Papilares/anormalidades , Músculos Papilares/diagnóstico por imagem
5.
Int J Cardiol ; 145(1): 3-8, 2010 Nov 05.
Artigo em Inglês | MEDLINE | ID: mdl-20483494

RESUMO

Acute aortic syndromes (AAS) remain one of the most challenging medical emergencies. Making a prompt and accurate diagnosis is a race against time, where delay may be disastrous for the patient's life. Prompt and accurate diagnosis using imaging modalities has been available for many years, but the major concern is how the clinician's suspicion should be aroused concerning the possibility of an acute aortic syndrome, especially in cases of atypical clinical presentation and/or poor signs during clinical examination. Since the first case report publication in 1995, novel biochemical markers have been used for the rapid diagnosis of AAS, such as smooth muscle myosin heavy chains, serum soluble elastin fragments, and d-dimers, with the latter being the most widely used in clinical trials. Despite their potential, all these substances need to be re-evaluated in large randomized trials before they can be included as biomarkers of high sensitivity and specificity in clinical practice.


Assuntos
Aorta Torácica/patologia , Biomarcadores/sangue , Doença Aguda , Animais , Elastina/sangue , Produtos de Degradação da Fibrina e do Fibrinogênio/metabolismo , Humanos , Cadeias Pesadas de Miosina/sangue , Sensibilidade e Especificidade , Síndrome
6.
Echocardiography ; 25(8): 898-900, 2008 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-18986417

RESUMO

Noncompaction myocardium of the left ventricle (LV) is a genetically heterogeneous congenital cardiomyopathy, that has only been described during the last two decades. Echocardiography plays a pivotal role as a first line diagnostic tool of this rare abnormality. The present case describes the imaging of the noncompacted myocardium using varying echocardiographic modalities.


Assuntos
Ecocardiografia/métodos , Disfunção Ventricular Esquerda/congênito , Disfunção Ventricular Esquerda/diagnóstico por imagem , Idoso , Diagnóstico Diferencial , Humanos , Masculino
7.
Europace ; 10 Suppl 3: iii96-100, 2008 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-18955407

RESUMO

Cardiac resynchronization therapy (CRT) has emerged as an established therapy for patients with end-stage heart failure (HF) and symptoms refractory to optimal medication. Resynchronization of the ventricles leads to reduced functional mitral regurgitation (MR) both acutely and chronically and to a better haemodynamic and energetic profile. In addition, large clinical trials have confirmed its beneficial effect on exercise performance and quality of life. The link between the pathophysiological mechanisms of CRT and its positive effect on clinical status has not been fully elucidated. Therefore, this review will focus on the effect of CRT on the haemodynamic role of functional MR and its impact on exercise performance in patients with chronic HF.


Assuntos
Estimulação Cardíaca Artificial , Teste de Esforço , Tolerância ao Exercício , Insuficiência Cardíaca/prevenção & controle , Insuficiência Cardíaca/fisiopatologia , Insuficiência da Valva Mitral/fisiopatologia , Insuficiência da Valva Mitral/terapia , Insuficiência Cardíaca/complicações , Insuficiência da Valva Mitral/complicações
8.
Eur J Echocardiogr ; 9(3): 422-3, 2008 May.
Artigo em Inglês | MEDLINE | ID: mdl-18490345

RESUMO

A 67-year-old asymptomatic male was admitted for evaluation of his arterial hypertension. The routine echocardiographic study revealed a large tumour in the dilated right atrium. The mass appeared to arise from the posterior wall of the right atrium. After infusion of a contrast agent, the mass appeared to fill with the contrast agent, ruling out the possibility of the mass being a clot. Transesophageal study revealed a round mass arising from the posterior right atrial wall just adjacent to the extrusion of the superior vena cava. The patient subsequently underwent cardiac surgery and a cardiac tumour was excised that proved to be a cardiac myxoma. In this case we present echocardiographic images and the macro- and microscopic view of the right atrial myxoma.


Assuntos
Neoplasias Cardíacas/diagnóstico por imagem , Mixoma/diagnóstico por imagem , Idoso , Ecocardiografia Transesofagiana , Átrios do Coração , Neoplasias Cardíacas/cirurgia , Humanos , Masculino , Mixoma/cirurgia
9.
Eur J Heart Fail ; 10(5): 475-81, 2008 May.
Artigo em Inglês | MEDLINE | ID: mdl-18396456

RESUMO

BACKGROUND: Brain natriuretic peptide (BNP) and left ventricular (LV) inotropic reserve are major prognostic indexes in heart failure (HF). AIMS: To investigate the relationship between N-terminal-proBNP (NT-proBNP) changes in response to dobutamine stress echocardiography (DSE) and the LV inotropic reserve, in HF patients with dilated cardiomyopathy (DC). METHODS: We studied 41 patients with DC, LVEF 31.6+/-7.7%, NYHA class II-III and 15 controls. Plasma NT-proBNP levels were measured before and 60 min after three 5-min stages of dobutamine (5 to 15 microg/kg/min). RESULTS: Based on NT-proBNP changes in response to dobutamine, patients were categorized into two groups: In Group A circulating NT-proBNP levels fell (-16.6+/-7.8%), and in Group B they increased (8.4+/-9.1%). Group A had a marked improvement in WMSI compared to Group B (32.1+/-9.7% vs. 18.8+/-15.9%, p<0.001). Multivariate analysis showed that NT-proBNP changes were an independent predictor of LV inotropic reserve (b= -0.55, p<0.001). A reduction of 21.3% in plasma NT-proBNP levels in response to dobutamine predicted an improvement in WMSI of >25% with a sensitivity of 100% and a specificity of 92.3%. CONCLUSIONS: NT-proBNP changes in response to dobutamine reflect improvement in LV contractility and constitute an independent predictor of LV inotropic reserve in patients with DC.


Assuntos
Cardiomiopatia Dilatada/sangue , Cardiomiopatia Dilatada/diagnóstico por imagem , Ecocardiografia sob Estresse , Contração Miocárdica/efeitos dos fármacos , Peptídeo Natriurético Encefálico/sangue , Fragmentos de Peptídeos/sangue , Idoso , Cardiotônicos/farmacologia , Dobutamina/farmacologia , Feminino , Insuficiência Cardíaca/sangue , Insuficiência Cardíaca/diagnóstico por imagem , Humanos , Masculino , Pessoa de Meia-Idade
10.
Am J Cardiol ; 100(8): 1299-302, 2007 Oct 15.
Artigo em Inglês | MEDLINE | ID: mdl-17920374

RESUMO

Although coronary flow reserve (CFR) impairment was correlated with the prognosis of patients with idiopathic dilated cardiomyopathy (IDC) and microvascular ischemia was implicated in the progress of the disease, little is known about the effect of the established therapy with beta blockers on coronary microcirculation. The purpose of this study was to assess the effect of beta(1) blockade on coronary blood flow and CFR in patients with IDC. Fourteen patients with IDC and 10 control subjects underwent time-averaged peak coronary flow velocity (APCFV) measurements (centimeters per second) in the proximal left anterior descending coronary artery at baseline and at maximal hyperemia before and after beta(1) blockade with intravenous esmolol. CFR was defined as APCFV at maximal hyperemia/APCFV at baseline. Although there were no significant differences in APCFV at baseline between patients with IDC and controls, patients with IDC had significantly lower APCFV at maximal hyperemia than controls (54.2 +/- 12.0 vs 75.1 +/- 18.6, p <0.05) and decreased CFR (2.39 +/- 0.38 vs 3.50 +/- 0.54, respectively, p <0.05). After beta(1) blockade, a significant decrease in APCFV at baseline (19.5 +/- 3.7 vs 22.9 +/- 5.0, p <0.05) and enhancement of APCFV at maximal hyperemia (59.5 +/- 13.3 vs 54.2 +/- 12.0, p <0.05) were observed in patients with IDC, but not in control subjects, leading to significant improvement in CFR (3.06 +/- 0.40 vs 2.39 +/- 0.38, p <0.05). In conclusion, patients with IDC had alterations in coronary blood flow and decreased CFR that improved after beta(1) blockade. These alterations in microvascular function, which are partially reversed by beta blockade, may be 1 of the underlying mechanisms that contribute to the improved prognosis of patients with IDC under such therapy.


Assuntos
Antagonistas Adrenérgicos beta/uso terapêutico , Cardiomiopatia Dilatada/tratamento farmacológico , Cardiomiopatia Dilatada/fisiopatologia , Circulação Coronária/fisiologia , Propanolaminas/uso terapêutico , Antagonistas Adrenérgicos beta/administração & dosagem , Antagonistas Adrenérgicos beta/farmacologia , Velocidade do Fluxo Sanguíneo , Pressão Sanguínea , Cardiomiopatia Dilatada/diagnóstico por imagem , Angiografia Coronária , Circulação Coronária/efeitos dos fármacos , Feminino , Humanos , Infusões Intravenosas , Fluxometria por Laser-Doppler , Masculino , Pessoa de Meia-Idade , Propanolaminas/administração & dosagem , Propanolaminas/farmacologia , Fluxo Pulsátil
11.
J Am Soc Echocardiogr ; 20(11): 1319.e7-10, 2007 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-17658242

RESUMO

A 62-year-old man presented at our hospital with ventricular tachycardia. The diagnostic workup with echocardiography and magnetic resonance imaging that followed revealed a dilated, severely hypokinetic right ventricle with segmental wall dyskinesia suggesting the diagnosis of arrhythmogenic right ventricular cardiomyopathy. We present the echocardiographic and magnetic resonance imaging findings, including late enhanced magnetic resonance images.


Assuntos
Displasia Arritmogênica Ventricular Direita/complicações , Displasia Arritmogênica Ventricular Direita/diagnóstico , Ecocardiografia , Imageamento por Ressonância Magnética , Taquicardia Ventricular/diagnóstico , Taquicardia Ventricular/etiologia , Humanos , Masculino , Pessoa de Meia-Idade
12.
ASAIO J ; 53(3): 343-50, 2007.
Artigo em Inglês | MEDLINE | ID: mdl-17515727

RESUMO

Peripheral artery stiffness is altered in diabetic patients with end-stage renal disease (ESRD), whereas few data exist to confirm this trend for proximal aortic stiffness. The pulse wave velocity of the proximal aorta (PWVr) and of the carotid-to-femoral aortic segment (PWVcf) were determined by ultrasound imaging in 160 patients with ESRD (70 diabetic) and in 160 matched control subjects. Also, plasma levels of endothelin, homocysteine, and high-sensitivity C-reactive protein were determined in both groups. Patients with ESRD had increased pulse pressure, left ventricular (LV) end-diastolic diameter, LV mass index, PWVr, and PWVcf compared with control subjects (p < 0.05). Diabetic patients had increased LV mass index, PWVr, and PWVcf compared with nondiabetic patients with ESRD (p < 0.05). Endothelin levels exhibited a strong relation with PWVr (r = 0.32, p < 0.001) and PWVcf (r = 0.33, p < 0.001) measurements in ESRD patients. Multivariate linear regression analysis revealed that age, diabetes, and plasma levels of endothelin were major determinants of increased PWVr measurements in the total ESRD population. After adjustment for age, body surface area, time on dialysis, systolic blood pressure, history of hypertension, and plasma endothelin levels, diabetes was an independent factor associated with PWVr in ESRD subjects. Diabetic patients with ESRD had significantly increased proximal aortic stiffness and significantly altered plasma levels of endothelin as compared with the nondiabetic.


Assuntos
Doenças da Aorta/etiologia , Doenças da Aorta/metabolismo , Angiopatias Diabéticas/metabolismo , Endotelina-1/sangue , Falência Renal Crônica/metabolismo , Idoso , Doenças da Aorta/diagnóstico por imagem , Proteína C-Reativa/metabolismo , HDL-Colesterol/sangue , Angiopatias Diabéticas/diagnóstico por imagem , Ecocardiografia , Feminino , Homocisteína/sangue , Humanos , Modelos Lineares , Masculino , Pessoa de Meia-Idade , Análise Multivariada , Fluxo Pulsátil , Triglicerídeos/sangue
13.
Int J Cardiol ; 118(2): 206-14, 2007 May 31.
Artigo em Inglês | MEDLINE | ID: mdl-17027102

RESUMO

OBJECTIVES: To assess atrial fibrillation (AF) associated differences in proinflammatory cytokines, natriuretic peptide levels and exercise capacity in patients with heart failure (HF) secondary to non-ischemic dilated cardiomyopathy (NIDC). METHODS: We studied 147 NIDC patients, mean age 58.3+/-12.5 years, left ventricular (LV) ejection fraction 27.8+/-10.9% and NYHA class II-III. Neurohumoral activation was assessed by measurement of interleukin IL-1, IL-6, tumor necrosis factor-a (TNF-a), its soluble receptors sTNFR I and II, N-terminal atrial (NT-ANP) and -brain (NT-BNP) natriuretic peptide levels, and functional class was assessed by cardiopulmonary exercise test. RESULTS: Forty patients (27.5%) had chronic AF and they did not differ in age, LV ejection fraction or HF duration compared to patients in sinus rhythm (SR). AF was associated with increased levels of IL-6 (p=0.001), TNF-a (p=0.002), sTNFRI (p=0.023), NT-ANP (p<0.001) and NT-BNP (p=0.003), decreased exercise duration (p<0.001) and slightly reduced maximal oxygen consumption at peak exercise (p=0.07) compared to SR patients. No significant differences in cytokine and natriuretic peptide levels or exercise tolerance were noted when patients in AF were compared to the subgroup of SR with restrictive LV filling pattern. Multivariate analysis showed that NT-ANP (p=0.003) and IL-6 (p=0.006) plasma levels were independently associated with the presence of AF in our patient population. CONCLUSION: AF is associated with increased inflammatory state, natriuretic peptide levels and reduced exercise capacity in patients with HF secondary to NIDC. These findings suggest that the presence of AF in HF represents a more advanced stage of the syndrome.


Assuntos
Fibrilação Atrial/sangue , Fibrilação Atrial/etiologia , Cardiomiopatia Dilatada/complicações , Tolerância ao Exercício , Insuficiência Cardíaca/etiologia , Insuficiência Cardíaca/fisiopatologia , Neurotransmissores/sangue , Cardiomiopatia Dilatada/diagnóstico por imagem , Doença Crônica , Citocinas/sangue , Teste de Esforço , Feminino , Frequência Cardíaca , Humanos , Masculino , Pessoa de Meia-Idade , Peptídeos Natriuréticos/sangue , Consumo de Oxigênio , Ultrassonografia , Função Ventricular Esquerda
14.
Am J Nephrol ; 26(6): 536-43, 2006.
Artigo em Inglês | MEDLINE | ID: mdl-17159341

RESUMO

OBJECTIVES AND METHODS: Two thirds of men with end-stage kidney disease (ESKD) have serum testosterone levels in the hypogonadal range. We examined if low serum testosterone levels were correlated with measures of endothelial dysfunction in ESKD. Bilateral common carotid artery (CCA) intima-media thickness (IMT) and atherosclerotic plaque occurrence, left ventricular mass index, flow- (FMD) and nitrate-mediated vasodilatation (NMD) of the brachial artery were determined by ultrasound imaging in 100 nondiabetic men with ESKD (50 men exhibited androgen deficiency; serum testosterone concentrations <300 ng/dl). RESULTS: Left-ventricular mass index, CCA diameter, CCA-IMT and atherosclerotic plaque occurrence were all significantly increased in ESKD patients with androgen deficiency compared with patients without androgen deficiency (p < 0.05). Also, FMD and NMD measurements were significantly reduced in the former compared with the latter (p < 0.05). Testosterone levels were inversely correlated with age and duration of hemodialysis therapy (r = -0.44 and r = -0.55; p < 0.001). Testosterone levels were negatively correlated to CCA-IMT and atherosclerotic plaque occurrence in patients with androgen deficiency (r = -0.32, p < 0.003, and r = -0.23, p < 0.04, respectively). FMD and NMD measurements were positively correlated to total (r = 0.65 and r = 0.61; both p < 0.0001) and free (r = 0.52 and r = 0.48; both p < 0.001) testosterone levels in patients with low androgenicity. CONCLUSION: The present results indicated that ESKD patients with androgen deficiency had increased CCA-IMT, atherosclerotic plaque occurrence and reduced FMD and NMD compared with patients without androgen deficiency. Testosterone serum levels were negatively correlated to CCA-IMT and positively correlated to endothelium-dependent vasodilatation in ESKD patients with androgen deficiency.


Assuntos
Androgênios/deficiência , Artéria Carótida Primitiva/patologia , Endotélio Vascular/fisiopatologia , Falência Renal Crônica/fisiopatologia , Testosterona/sangue , Adulto , Aterosclerose/diagnóstico por imagem , Aterosclerose/patologia , Artéria Braquial/diagnóstico por imagem , Artéria Braquial/fisiologia , Artéria Carótida Primitiva/diagnóstico por imagem , Endotélio Vascular/patologia , Humanos , Falência Renal Crônica/patologia , Masculino , Pessoa de Meia-Idade , Diálise Renal , Ultrassonografia , Vasodilatação/fisiologia , Disfunção Ventricular Esquerda/patologia
15.
Angiology ; 57(2): 211-8, 2006.
Artigo em Inglês | MEDLINE | ID: mdl-16518530

RESUMO

The authors investigated the time-dependent action of atorvastatin and simvastatin on oxidative stress and cytokine levels immediately after the start of treatment. These factors play a role in endothelial dysfunction. Hyperlipidemic patients (n = 132) were assigned to treatment with 40 mg atorvastatin, 40 mg simvastatin, or placebo. Blood samples were taken before, 2 hours, 24 hours, 7 days, and 3 weeks after the administration of the statin or placebo to evaluate serum concentrations of total peroxides (TP), interleukin-6 (IL-6), tumor necrosis factor-alpha (TNF-alpha) and soluble intercellular vascular adhesion molecule 1 (sICAM 1). In the atorvastatin group the TP changes were significantly different at 2 hours and 24 hours (p = 0.005), whereas in the simvastatin group there was a gradual, more or less linear decline in TP until 7 days (p = 0.006) and then a plateau. Simvastatin exhibited a faster statistically significant decrease over time in IL-6 and sICAM 1 levels (at 7 days, p = 0.014 and p = 0.001, respectively). TNF-alpha demonstrated a faster linear trend in the simvastatin group, but the significant effect appeared late (p = 0.006). Both simvastatin and atorvastatin exerted early beneficial effects on oxidative stress, proinflammatory cytokines, and endothelial activation in hyperlipidemic subjects. These effects became significant 2 hours following the initiation of therapy.


Assuntos
Citocinas/sangue , Ácidos Heptanoicos/uso terapêutico , Hiperlipidemias/tratamento farmacológico , Hipolipemiantes/uso terapêutico , Estresse Oxidativo/efeitos dos fármacos , Pirróis/uso terapêutico , Sinvastatina/uso terapêutico , Adulto , Idoso , Atorvastatina , Biomarcadores/sangue , Citocinas/efeitos dos fármacos , Feminino , Seguimentos , Humanos , Hiperlipidemias/sangue , Molécula 1 de Adesão Intercelular/sangue , Molécula 1 de Adesão Intercelular/efeitos dos fármacos , Interleucina-6/sangue , Peróxidos Lipídicos/sangue , Masculino , Pessoa de Meia-Idade , Estresse Oxidativo/fisiologia , Resultado do Tratamento , Fator de Necrose Tumoral alfa/metabolismo
16.
Int J Cardiol ; 108(2): 212-5, 2006 Apr 04.
Artigo em Inglês | MEDLINE | ID: mdl-16290101

RESUMO

BACKGROUND: The incidence of subclinical cardiotoxicity following anthracycline treatment for childhood cancer varies according to the method used for its detection. The aim of the study was to document the prevalence of left ventricular myocardial mass (LVM) reduction and its possible association with plasma N-terminal pro-brain natriuretic peptide (NT-proBNP) levels in asymptomatic children treated with anthracyclines. PATIENTS AND METHODS: Nineteen asymptomatic children who had received anthracyclines during their treatment for cancer were evaluated. They had received an equivalent of doxorubicin dose 240 mg/m2 (22-1200 mg/m2) on average 3.9 years (0.6-8.3) before (median age at diagnosis 3.8 years). The LVM was determined by M-Mode echocardiography and compared to the expected value, obtained from the regression equation of LVM on height of a group of 160 healthy children. Additionally the patients' plasma NT-pro BNP levels were determined. RESULTS: A high prevalence of reduced LVM associated with increased NT-proBNP levels was found. The average LVM value was -14.4% (+/-4.9) lower than expected whereas fourteen patients (73%) had a lower LVM than predicted. The NT-pro BNP levels in patients with reduced LVM were significantly higher than those measured in patients without LVM reduction (0.316+/-0.02 versus 0.17+/-0.01 pmol/ml respectively, p=0.009). A cut off NT-pro BNP level of 0.2 pmol/ml could differentiate patients with LVM reduction from those with normal or greater than expected LVM. CONCLUSION: The association of higher NT-proBNP levels with reduced LVM in asymptomatic children after anthracycline administration could be an early indication of subclinical cardiotoxicity.


Assuntos
Antraciclinas/efeitos adversos , Doxorrubicina/efeitos adversos , Cardiopatias/induzido quimicamente , Ventrículos do Coração/efeitos dos fármacos , Peptídeo Natriurético Encefálico/sangue , Fragmentos de Peptídeos/sangue , Adolescente , Antraciclinas/farmacologia , Antraciclinas/uso terapêutico , Criança , Pré-Escolar , Doxorrubicina/farmacologia , Doxorrubicina/uso terapêutico , Feminino , Humanos , Masculino , Leucemia-Linfoma Linfoblástico de Células Precursoras/tratamento farmacológico
17.
J Am Soc Echocardiogr ; 18(9): 979, 2005 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-16153525

RESUMO

The ratio of early (Ep) to late (Ap) color M-mode Doppler flow propagation through the left ventricle helps in the differentiation between normal and pseudonormal (PSN) filling pattern in patients with preserved systolic function. We studied the value of this index in the assessment of diastolic dysfunction for patients with reduced left ventricular systolic function. We studied 80 patients with nonischemic dilated cardiomyopathy and 50 control subjects. According to echocardiography 53 patients had abnormal relaxation and 27 had PSN pattern. Patients had reduced Ep (P < .001) and Ep/Ap ratio (P < .001) and increased Ap (P = .001) compared to controls. Binary logistic regression analysis showed that Ep followed by Ep/Ap ratio (both P < .001) were the best determinants for the discrimination of PSN from normal filling pattern. Ep/Ap ratio, this novel echo-index, increases the diagnostic accuracy of color M-mode Doppler in discriminating normal from PSN filling pattern in patients with left ventricular systolic dysfunction.


Assuntos
Cardiomiopatia Dilatada/diagnóstico por imagem , Ecocardiografia Doppler em Cores/métodos , Disfunção Ventricular Esquerda/diagnóstico por imagem , Cardiomiopatia Dilatada/complicações , Diástole , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Reprodutibilidade dos Testes , Sensibilidade e Especificidade , Disfunção Ventricular Esquerda/etiologia
18.
J Am Coll Cardiol ; 44(10): 2027-32, 2004 Nov 16.
Artigo em Inglês | MEDLINE | ID: mdl-15542287

RESUMO

OBJECTIVES: The purpose of this study was to assess regional coronary flow and contractile reserve in patients with idiopathic dilated cardiomyopathy (IDCM). BACKGROUND: Although IDCM has been associated with alterations in coronary blood flow and contractile reserve, little is known about their regional distribution and correlation. METHODS: Fourteen patients with IDCM and 11 control subjects underwent coronary flow velocity (APV) measurements in the left anterior descending (LAD), left circumflex (LCx), and right coronary (RCA) arteries at baseline (b) and at maximal hyperemia (h). Coronary flow reserve (CFR) was defined as h-APV/b-APV. Wall thickening was assessed in 16 segments (7 assigned to LAD, 5 to LCx, and 4 to RCA) both at rest and under peak stress during low-dose dobutamine echocardiography. Regional contractile reserve was defined as the percentage difference in wall motion score index between rest and stress in each vascular territory. RESULTS: Although there were no significant differences in b-APV, patients with IDCM had significantly lower h-APV than controls in all three vascular territories and reduced CFR (LAD: 2.79 +/- 0.43 vs. 3.48 +/- 0.51, p < 0.05; LCx: 2.71 +/- 0.39 vs. 3.36 +/- 0.65, p < 0.05; and RCA: 3.43 +/- 0.55 vs. 4.02 +/- 0.73, p < 0.05). There was also a significant correlation between CFR and the corresponding contractile reserve in the vascular territory of the LAD (r = 0.75, p = 0.002) and the LCx (r = 0.64, p = 0.014). CONCLUSIONS: Patients with IDCM have alterations in regional coronary flow and reduced CFR. Furthermore, the correlation between regional CFR and the corresponding contractile reserve indicates that microvascular dysfunction may have a pathophysiologic role in the evolution of the disease.


Assuntos
Cardiomiopatia Dilatada/fisiopatologia , Vasos Coronários/fisiologia , Velocidade do Fluxo Sanguíneo , Cardiomiopatia Dilatada/diagnóstico por imagem , Estudos de Casos e Controles , Angiografia Coronária , Circulação Coronária/fisiologia , Dobutamina , Ecocardiografia , Teste de Esforço , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Fluxo Pulsátil
19.
Eur J Heart Fail ; 6(6): 735-43, 2004 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-15542409

RESUMO

OBJECTIVES: Although heart failure (HF) is characterized by increased proinflammatory cytokines, natriuretic peptide levels and impaired exercise capacity, the effect of concomitant diastolic dysfunction on those parameters has not been adequately studied. METHODS: We analyzed circulating levels of IL-1, IL-6, TNF-alpha and its soluble receptors, sTNFRI and sTNFRII, Nt-ANP and Nt-BNP natriuretic peptides in 81 patients, aged 56+/-12 years, with non-ischemic dilated cardiomyopathy (NIDC), LVEF 29.7+/-7.75% and functional NYHA class II-III. An echocardiographic study and cardiopulmonary exercise test (CPE) were performed in all patients. RESULTS: Patients were divided into restrictive (24 patients, group I) and non-restrictive (57 patients, group II) groups, according to their transmitral-filling pattern. No differences in LV dimensions or LVEF were found between the two groups. Group I showed increased levels of IL-6 (P=0.006), TNF-alpha (P=0.05), sTNFRII (P=0.02), Nt-ANP (P<0.001) and Nt-BNP (P<0.001) and decreased exercise duration (P<0.001) and PVO(2) (P<0.001) compared to group II. The strongest independent predictors for restrictive filling pattern were Nt-ANP and IL-6 levels, while Nt-BNP levels were the strongest PVO(2) predictor. CONCLUSIONS: Restrictive filling pattern implying greater diastolic dysfunction may contribute to increased cytokine production in the heart failure syndrome, as well as greater increases in natriuretic peptides and decreased exercise tolerance.


Assuntos
Cardiomiopatia Dilatada/fisiopatologia , Tolerância ao Exercício , Idoso , Ensaio de Imunoadsorção Enzimática , Teste de Esforço , Feminino , Humanos , Interleucina-1/sangue , Interleucina-6/sangue , Masculino , Pessoa de Meia-Idade , Peptídeo Natriurético Encefálico/sangue , Curva ROC , Receptores Tipo I de Fatores de Necrose Tumoral/sangue , Receptores Tipo II do Fator de Necrose Tumoral/sangue , Sensibilidade e Especificidade , Fator de Necrose Tumoral alfa/análise
20.
J Am Soc Echocardiogr ; 17(2): 139-45, 2004 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-14752488

RESUMO

BACKGROUND: Early color M-mode Doppler flow propagation (Ep) through the left ventricle (LV) has been proposed as a useful noninvasive index for assessing LV relaxation, whereas data concerning late velocity propagation (Ap) is lacking. METHODS: We studied 51 patients with delayed relaxation (group I) and 50 with pseudonormal filling pattern (group II). Another 51 aged-matched healthy persons served as the control group. RESULTS: Patients showed increased left atrial dimensions, atrial wave of the pulmonary vein flow, and Ap, and reduced LV ejection fraction, Ep, and Ep/Ap ratio compared with the control group. Patients in group II revealed increased left atrial dimensions (P =.001), atrial wave of the pulmonary vein flow (P <.001), and Ep/Ap ratio (P <.001), and reduced LV ejection fraction and Ap (P <.001) compared with group I. Regression analysis showed that the strongest independent variable distinguishing normal from pseudonormal filling pattern was the Ep/Ap ratio. CONCLUSION: Ap evaluation offers a new diagnostic diastolic index, especially in the field of the pseudonormal pattern where the separation from normal is difficult.


Assuntos
Ecocardiografia Doppler em Cores , Insuficiência Cardíaca/diagnóstico por imagem , Disfunção Ventricular Esquerda/diagnóstico por imagem , Adulto , Idoso , Velocidade do Fluxo Sanguíneo , Estudos de Casos e Controles , Diástole , Insuficiência Cardíaca/fisiopatologia , Humanos , Modelos Logísticos , Pessoa de Meia-Idade , Valores de Referência , Reprodutibilidade dos Testes , Sensibilidade e Especificidade , Disfunção Ventricular Esquerda/fisiopatologia , Função Ventricular Esquerda
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA
...