Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 95
Filtrar
1.
Neth Heart J ; 30(9): 436-441, 2022 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-35727493

RESUMO

BACKGROUND: Patients with advanced heart failure may benefit from palliative care, including advance care planning (ACP). ACP, which can include referral back to the general practitioner (GP), may prevent unbeneficial hospital admissions and interventional/surgical procedures that are not in accordance with the patient's personal goals of care. AIM: To implement ACP in patients with advanced heart failure and explore the effect of ACP on healthcare utilisation as well as the satisfaction of patients and cardiologists. METHODS: In this pilot study, we enrolled 30 patients with New York Heart Association class III/IV heart failure who had had at least one unplanned hospital admission in the previous year because of heart failure. A structured ACP conversation was held and documented by the treating physician. Primary outcome was the number of visits to the emergency department and/or admissions within 3 months after the ACP conversation. Secondary endpoints were the satisfaction of patients and cardiologists as established by using a five-point Likert scale. RESULTS: Median age of the patients was 81 years (range 33-94). Twenty-seven ACP documents could be analysed (90%). Twenty-one patients (78%) did not want to be readmitted to the hospital and subsequently none of them were readmitted during follow-up. Twenty-two patients (81%) discontinued all hospital care. All patients who died during follow-up (n = 12, 40%) died at home. Most patients and cardiologists indicated that they would recommend the intervention to others (80% and 92% respectively). CONCLUSION: ACP, and subsequent out-of-hospital care by the GP, was shown to be applicable in the present study of patients with advanced heart failure and evident palliative care needs. Patients and cardiologists were satisfied with this intervention.

2.
Value Health ; 18(1): 91-9, 2015 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-25595239

RESUMO

BACKGROUND: Risk attitudes and personality traits are known predictors of decision making among laypersons, but very little is known of their influence among experts participating in organizational decision making. METHODS: Seventy-five European medical assessors were assessed in a field study using the Domain Specific Risk Taking scale and the Big Five Inventory scale. Assessors rated the risks and benefits for a mock "clinical dossier" specific to their area of expertise, and ordinal regression models were used to assess the odds of risk attitude or personality traits in predicting either the benefit or the risk ratings. RESULTS: An increase in the "conscientiousness" score predicted an increase in the perception of the drug's benefit, and male assessors gave higher scores for the drug's benefit ratings than did female assessors. Extraverted assessors saw fewer risks, and assessors with a perceived neutral-averse or averse risk profile saw greater risks. CONCLUSIONS: Medical assessors perceive the benefits and risks of medicines via a complex interplay of the medical situation, their personality traits and even their gender. Further research in this area is needed to determine how these potential biases are managed within the regulatory setting.


Assuntos
Atitude do Pessoal de Saúde , Tomada de Decisões Gerenciais , Percepção , Personalidade , Preparações Farmacêuticas , Inquéritos e Questionários , Adulto , Europa (Continente) , Feminino , Previsões , Humanos , Masculino , Pessoa de Meia-Idade , Preparações Farmacêuticas/normas , Medição de Risco/métodos , Assunção de Riscos , Adulto Jovem
3.
Eur J Surg Oncol ; 48(9): 1882-1894, 2022 09.
Artigo em Inglês | MEDLINE | ID: mdl-35599137

RESUMO

The optimal surgical treatment strategy for gastric cancer in older patients needs to be carefully evaluated due to increased vulnerability of older patients. We performed a database search for randomized controlled trials (RCTs) and cohort studies that included patients ≥70 years with potentially resectable stage I-III gastric cancer. Postoperative and survival outcomes were compared between groups undergoing 1) gastrectomy vs conservative treatment (best supportive care or non-operative treatment), 2) minimally invasive (MIG) vs open gastrectomy (OG), or 3) extended vs limited lymphadenectomy. When possible, results were pooled using risk ratios (RR). Thirty-one studies were included. Six retrospective studies compared overall survival (OS) between gastrectomy (N = 2332) and conservative treatment (N = 246). Longer OS was reported in the gastrectomy group in all studies, but study quality was low and meta-analysis was not feasible. Eighteen cohort studies compared MIG (N = 3626) and OG (N = 5193). MIG was associated with fewer complications (pooled RR 0.68, 95% confidence interval 0.54-0.84). OS was not different between the groups. Two RCTs and five cohort studies compared outcomes between extended (N = 709) and limited lymphadenectomy (N = 1323). Complication rates were comparable between the groups. Two cohort studies found longer OS or cancer-specific survival after extended lymphadenectomy. No quality of life (QoL) or functional outcomes were reported. In older patients with gastric cancer, there is low-quality evidence for better OS after gastrectomy vs conservative treatment. Compared to OG, MIG was associated with less postoperative morbidity. The evidence to support extended lymphadenectomy is limited. QoL and functional outcomes should be addressed in future studies.


Assuntos
Laparoscopia , Neoplasias Gástricas , Idoso , Idoso de 80 Anos ou mais , Estudos de Coortes , Gastrectomia/métodos , Humanos , Excisão de Linfonodo/métodos , Estudos Retrospectivos , Neoplasias Gástricas/patologia , Resultado do Tratamento
4.
Eur J Surg Oncol ; 47(10): 2682-2688, 2021 10.
Artigo em Inglês | MEDLINE | ID: mdl-34127326

RESUMO

BACKGROUND: In order to tailor treatment to the individual patient, it is important to take the patients context and preferences into account, especially for older patients. We assessed the quality of information used in the decision-making process in different oncological MDTs and compared this for older (≥70 years) and younger patients. PATIENTS AND METHODS: Cross-sectional observations of oncological MDTs were performed, using an observation tool in a University Hospital. Primary outcome measures were quality of input of information into the discussion for older and younger patients. Secondary outcomes were the contribution of different team members, discussion time for each case and whether or not a treatment decision was formulated. RESULTS: Five-hundred and three cases were observed. The median patient age was 63 year, 32% were ≥70. In both age groups quality of patient-centered information (psychosocial information and patient's view) was poor. There was no difference in quality of information between older and younger patients, only for comorbidities the quality of information for older patients was better. There was no significant difference in the contributions by team members, discussion time (median 3.54 min) or number of decision reached (87.5%). CONCLUSION: For both age groups, we observed a lack of patient-centered information. The only difference between the age groups was for information on comorbidities. There were also no differences in contributions by different team members, case discussion time or number of decisions. Decision-making in the observed oncological MDTs was mostly based on medical technical information.


Assuntos
Tomada de Decisão Clínica , Comunicação Interdisciplinar , Neoplasias/terapia , Equipe de Assistência ao Paciente , Fatores Etários , Idoso , Tomada de Decisão Clínica/métodos , Comorbidade , Estudos Transversais , Feminino , Humanos , Masculino , Prontuários Médicos/normas , Pessoa de Meia-Idade , Variações Dependentes do Observador , Preferência do Paciente , Assistência Centrada no Paciente
5.
Breast ; 60: 263-271, 2021 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-34808438

RESUMO

BACKGROUND: This study aimed to provide insights into the real-world use of palbociclib, dose reductions, and drug effectiveness in (older) patients with advanced breast cancer (BC). PATIENTS AND METHODS: Patients with advanced BC treated with palbociclib from 2017 to 2020 were included. The Kaplan-Meier method was used to calculate time to next treatment (TTNT) and overall survival (OS) for patients with or without dose reductions. These clinical outcomes were also compared in subgroup analyses for older patients (≥70 years) and younger patients (<70 years) and for patients discontinuing palbociclib early (<4 administrations). RESULTS: A total of 598 patients with advanced BC were included, with a median age of 64 years. Palbociclib dose reductions occurred in 33% of all patients. Early discontinuation of palbociclib without dose reductions occurred in 23% of the patients. Patients who required a palbociclib dose reduction were older (median age 67 years vs. 63 years). Patients with dose reductions had a significantly higher TTNT of 16.9 vs. 11.4 months (p < 0.001) and median OS of 29.7 vs. 21.9 months (p = 0.003) compared to patients without dose reductions. The TTNT in older patients was significantly longer (16.9 vs. 11.6 months, p = 0.013) than younger patients, but OS was similar (20.7 vs. 26.7 months, p = 0.051). CONCLUSION: Palbociclib dose reductions occurred in real-world practice similarly to the PALOMA-3 trial. Patients with dose reductions had no poorer outcomes compared to patients not requiring a dose reduction. Older patients treated with palbociclib had more frequent dose reductions, but this did not appear to affect OS.


Assuntos
Neoplasias da Mama , Idoso , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Neoplasias da Mama/tratamento farmacológico , Redução da Medicação , Feminino , Humanos , Pessoa de Meia-Idade , Piperazinas , Piridinas , Receptor ErbB-2
6.
Br J Cancer ; 101(1): 149-59, 2009 Jul 07.
Artigo em Inglês | MEDLINE | ID: mdl-19513073

RESUMO

BACKGROUND: P53, EGFR and HER-2/neu are the most frequently studied molecular biological parameters in epithelial ovarian cancer, but their prognostic impact is still unequivocal. We performed a meta-analysis to more precisely estimate their prognostic significance. METHODS: Published studies that investigated the association between p53, EGFR and HER-2/neu status and survival were identified. Meta-analysis was performed using a DerSimonian-Laird model. Publication bias was investigated using funnel plots and sources of heterogeneity were identified using meta-regression analysis. RESULTS: A total of 62 studies were included for p53, 15 for EGFR and 20 for HER-2/neu. P53, EGFR and HER-2/neu status had a modest effect on overall survival (pooled HR 1.47, 95% CI 1.33-1.61 for p53; HR 1.65, 95% CI 1.25-2.19 for EGFR and HR 1.67, 95% CI 1.34-2.08 for HER-2/neu). Meta-regression analysis for p53 showed that FIGO stage distribution influenced study outcome. For EGFR and HER-2/neu, considerable publication bias was present. CONCLUSIONS: Although p53, EGFR and HER-2/neu status modestly influences survival, these markers are, by themselves, unlikely to be useful as prognostic markers in clinical practice. Our study highlights the need for well-defined, prospective clinical trials and more complete reporting of results of prognostic factor studies.


Assuntos
Biomarcadores Tumorais/biossíntese , Receptores ErbB/biossíntese , Neoplasias Ovarianas/metabolismo , Receptor ErbB-2/biossíntese , Proteína Supressora de Tumor p53/biossíntese , Feminino , Humanos , Neoplasias Ovarianas/enzimologia , Prognóstico , Modelos de Riscos Proporcionais
7.
Br J Cancer ; 99(2): 341-9, 2008 Jul 22.
Artigo em Inglês | MEDLINE | ID: mdl-18628764

RESUMO

Ovarian cancer is the most frequent cause of death from gynaecological cancer in the Western world. Current prognostic factors do not allow reliable prediction of response to chemotherapy and survival for individual ovarian cancer patients. Epidermal growth factor receptor (EGFR) and HER-2/neu are frequently expressed in ovarian cancer but their prognostic value remains unclear. In this study, we investigated the expression and prognostic value of EGFR, EGFR variant III (EGFRvIII), HER-2/neu and important downstream signalling components in a large series of epithelial ovarian cancer patients. Immunohistochemical staining of EGFR, pEGFR, EGFRvIII, Her-2/neu, PTEN (phosphatase and tensin homologue deleted on chromosome 10), total and phosphorylated AKT (pAKT) and phosphorylated ERK (pERK) was performed in 232 primary tumours using the tissue microarray platform and related to clinicopathological characteristics and survival. In addition, EGFRvIII expression was determined in 45 tumours by RT-PCR. Our results show that negative PTEN immunostaining was associated with stage I/II disease (P=0.006), non-serous tumour type (P=0.042) and in multivariate analysis with a longer progression-free survival (P=0.015). Negative PTEN staining also predicted improved progression-free survival in patients with grade III or undifferentiated serous carcinomas (P=0.011). Positive pAKT staining was associated with advanced-stage disease (P=0.006). Other proteins were expressed only at low levels, and were not associated with any clinicopathological parameter or survival. None of the tumours were positive for EGFRvIII. In conclusion, our results indicate that tumours showing negative PTEN staining could represent a subgroup of ovarian carcinomas with a relatively favourable prognosis.


Assuntos
Receptores ErbB/metabolismo , Neoplasias Ovarianas/enzimologia , Adulto , Idoso , Idoso de 80 Anos ou mais , Intervalo Livre de Doença , Células Epiteliais/patologia , Receptores ErbB/biossíntese , MAP Quinases Reguladas por Sinal Extracelular/metabolismo , Feminino , Humanos , Pessoa de Meia-Idade , Estadiamento de Neoplasias , Proteína Oncogênica v-akt/metabolismo , Neoplasias Ovarianas/tratamento farmacológico , Neoplasias Ovarianas/patologia , Neoplasias Ovarianas/cirurgia , PTEN Fosfo-Hidrolase/metabolismo , Estudos Prospectivos , Receptor ErbB-2/metabolismo , Reação em Cadeia da Polimerase Via Transcriptase Reversa , Transdução de Sinais , Resultado do Tratamento
8.
Eur J Cancer ; 43(17): 2495-505, 2007 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-17949970

RESUMO

Three amino-acid loop extension (TALE) homeobox proteins MEIS and PBX are cofactors for HOX-class homeobox proteins, which control growth and differentiation during embryogenesis and homeostasis. We showed that MEIS and PBX expression are related to cisplatin resistance in ovarian cancer cell lines. Therefore, MEIS1, MEIS2 and PBX expression were investigated immunohistochemically in a tissue microarray (N=232) of ovarian cancers and ovarian surface epithelium (N=15). Results were related to clinicopathologic characteristics and survival. All cancers expressed MEIS1, MEIS2 and PBX in nucleus and cytoplasm. MEIS1 and 2 only stained nuclear in surface epithelium. Nuclear MEIS2 was negatively related to stage, grade and overall survival in univariate analyses. Additionally, MEIS and PBX RNA expression in ovarian surface epithelium and other normal tissues and ovarian cancer versus other tumour types using public array data sets were studied. In ovarian cancer, MEIS1 is highly expressed compared to other cancer types. In conclusion, MEIS and PBX are extensively expressed in ovarian carcinomas and may play a role in ovarian carcinogenesis.


Assuntos
Proteínas de Homeodomínio/metabolismo , Proteínas de Neoplasias/metabolismo , Neoplasias Ovarianas/metabolismo , Adulto , Idoso , Idoso de 80 Anos ou mais , Feminino , Humanos , Imuno-Histoquímica , Pessoa de Meia-Idade , Proteína Meis1 , Neoplasias Ovarianas/mortalidade , Fatores de Transcrição/metabolismo
11.
J Am Coll Cardiol ; 28(4): 813-9, 1996 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-8837553

RESUMO

Digoxin has been a controversial drug since its introduction >200 years ago. Although its efficacy in patients with heart failure and atrial fibrillation is clear, its value in patients with heart failure and sinus rhythm has often been questioned. In the 1980s, reports of some large-scale trials indicated that digoxin, with or without vasodilators or angiotensin-converting enzyme inhibitors, reduced signs and symptoms of congestive heart failure and improved exercise tolerance. This beneficial influence was mainly found in patients with more advanced heart failure and dilated ventricles, whereas the effect in those with mild disease appeared to be less pronounced. In the last few years, new data have shown that digoxin may also have clinical value in mild heart failure, either when used in combination with other drugs or when administered alone. As neurohumoral activation has increasingly been recognized to be a contributing factor in the disease progression of chronic heart failure, the modulating effects of digoxin on neurohumoral and autonomic status have received more attention. Also, there is evidence that relatively low doses of digoxin may be at least as effective as higher doses and have a lower incidence of side effects. Further, the recognition that the use of digoxin too early after myocardial infarction may be harmful and the development of other drugs, in particular angiotensin-converting enzyme inhibitors, have obviously changed the place of digoxin in the treatment of chronic heart failure. The large-scale survival trial by the Digitalis Investigators Group (DIG), whose preliminary results have recently been presented, has shown that although digoxin has a neutral effect on total mortality during long-term treatment, it reduces the number of hospital admissions and deaths due to worsening heart failure. The potentially new features of the old drug digoxin are discussed in this review.


Assuntos
Antiarrítmicos/uso terapêutico , Baixo Débito Cardíaco/tratamento farmacológico , Cardiotônicos/uso terapêutico , Digoxina/uso terapêutico , Insuficiência Cardíaca/tratamento farmacológico , Antiarrítmicos/administração & dosagem , Digoxina/administração & dosagem , Humanos
12.
J Mol Med (Berl) ; 75(5): 371-7, 1997 May.
Artigo em Inglês | MEDLINE | ID: mdl-9181479

RESUMO

To compare hypertensive end-organ damage in two genetic forms of hypertension we assessed cardiovascular function in two rat strains of genetic hypertension: transgenic rats overexpressing the mouse Ren-2 gene [(TGR(mREN2)27]) and blood pressure matched spontaneously hypertensive rats (SHR). Despite similarly elevated blood pressure, systolic dp/dt (mmHg/s) was more impaired in transgenic rats (3099 +/- 446) than in SHR (3571 +/- 272) and normals (4342 +/- 119; P < 0.05). Left ventricular weight (mg/g body weight) increased more in the transgenic rats (40 +/- 3) than in SHR (31 +/- 2) and normals (26 +/- 2). Endothelium-dependent relaxation was significantly decreased only in the transgenic rats. This study shows significantly more cardiac and endothelial dysfunction in transgenic, hypertensive TGR (mREN2)27 than in age and blood pressure matched SHR. This supports the hypothesis that chronic activation of the renin-angiotensin system significantly contributes to hypertensive end-organ damage.


Assuntos
Hipertensão/fisiopatologia , Sistema Renina-Angiotensina/fisiologia , Renina/genética , Animais , Animais Geneticamente Modificados , Modelos Animais de Doenças , Endotélio/fisiologia , Hipertensão/genética , Hipertensão/patologia , Masculino , Camundongos , Miocárdio/patologia , Peptidil Dipeptidase A/sangue , Peptidil Dipeptidase A/metabolismo , RNA Mensageiro , Ratos , Ratos Endogâmicos SHR , Ratos Sprague-Dawley , Ratos Wistar , Renina/sangue , Sistema Renina-Angiotensina/genética
13.
Cardiovasc Res ; 27(11): 1933-8, 1993 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-8287399

RESUMO

OBJECTIVE: The cardiac renin-angiotensin system is activated in experimental heart failure, but it is unknown at what stage of heart failure it becomes activated, and whether activation is related to ventricular dysfunction and dilatation. Changes in activity of cardiac, renal, and plasma angiotensin converting enzyme (ACE) were therefore examined at different stages of experimental heart failure, with simultaneous measurements of left ventricular pressure, systolic dP/dt, and inner ventricular radius. METHODS: Heart failure was induced by experimental infarction in 17 normotensive male Wistar rats; 14 rats were sham operated. Rats were killed 3, 5, or 80 d after infarction. In an isolated heart perfusion, left ventricular pressure and systolic dP/dT were measured. ACE activity was determined in samples of the left and right cardiac ventricle, kidney, and plasma. Radius of the ventricular cavity was planimetrically determined in transverse sections of the left ventricle. RESULTS: At the different stages both left ventricular pressure and systolic dP/dT progressively decreased and inner radius of the left ventricle increased in all heart failure groups. ACE activity in the left ventricle increased significantly in all heart failure groups and correlated inversely with left ventricular pressure (R = -0.81; p < 0.001) and dP/dt (R = -0.85; p < 0.001). ACE activity in the kidney was only increased 80 d after the induction of heart failure [17(SEM 1) v 11.2(0.5) nM His-Leu generated per min.mg-1, p < 0.01], while plasma ACE activity was not increased in any heart failure group. CONCLUSIONS: Cardiac ACE is activated in the early stage after induction of heart failure and is related to the amount of dysfunction. ACE in the kidney is activated only in the chronic stage. The cardiac renin-angiotensin system therefore already appears to be an important neurohumoral adjustment in the early stage of heart failure and is thereby a suitable target for early intervention by ACE inhibitors.


Assuntos
Insuficiência Cardíaca/fisiopatologia , Coração/fisiopatologia , Sistema Renina-Angiotensina/fisiologia , Doença Aguda , Animais , Insuficiência Cardíaca/sangue , Insuficiência Cardíaca/enzimologia , Insuficiência Cardíaca/patologia , Frequência Cardíaca/efeitos dos fármacos , Isoproterenol/farmacologia , Rim/enzimologia , Masculino , Miocárdio/enzimologia , Miocárdio/patologia , Peptidil Dipeptidase A/sangue , Peptidil Dipeptidase A/metabolismo , Ratos , Ratos Wistar , Fatores de Tempo
14.
Cardiovasc Res ; 25(11): 936-42, 1991 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-1813122

RESUMO

STUDY OBJECTIVE: The aim was to compare the effects of two novel angiotensin converting enzyme (ACE) inhibitors, spirapril and zofenopril, on cardiac remodelling in rats with congestive heart failure after myocardial infarction. Spirapril contains no sulphydryl group, whereas zofenopril is a sulphydryl containing ACE inhibitor. DESIGN: Experimental myocardial infarction was induced by ligation of the left coronary artery. Sham operated animals served as controls. Treatment with spirapril (2-2.5 mg.kg-1.d-1) or zofenopril (12-15 mg.kg-1.d-1) added to the drinking water was started immediately after myocardial infarction or sham operation and continued for six weeks. After the treatment period, all rats were killed. The heart was rapidly removed and perfused as described by Langendorff. Heart rate and left ventricular pressure were measured both at baseline and during stimulation with isoprenaline (6 nM). Heart and lung weights were determined. SUBJECTS: Normotensive male Wistar rats (220-240 g) were used. MEASUREMENTS AND MAIN RESULTS: Experimental myocardial infarction considerably increased left ventricular cavity volume. Chronic treatment with either spirapril or zofenopril significantly attenuated this increase in volume. In infarcted rats, the increase in total heart and lung weight was also significantly reduced by chronic treatment with spirapril and zofenopril, indicating that these compounds reduce cardiac mass and pulmonary congestion in congestive heart failure due to myocardial infarction. There were no significant differences between treatment with spirapril and zofenopril. In the isolated and perfused rat heart, myocardial infarction significantly decreased both heart rate and left ventricular pressure. Converting enzyme inhibition only affected heart rate. Heart rate was significantly higher in infarcted animals treated with spirapril and zofenopril than in untreated infarcted animals. CONCLUSIONS: Both spirapril and zofenopril attenuated ventricular enlargement and cardiac hypertrophy in rats with congestive heart failure after myocardial infarction when treatment was started in the acute phase of myocardial infarction. No additional role could be attributed to the sulphydryl moiety of zofenopril. It is also suggested that these two ACE inhibitors modify cardiac sympathetic activity in rats with congestive heart failure, but more studies are needed to confirm these findings.


Assuntos
Inibidores da Enzima Conversora de Angiotensina/farmacologia , Coração/efeitos dos fármacos , Infarto do Miocárdio/fisiopatologia , Inibidores da Enzima Conversora de Angiotensina/sangue , Animais , Captopril/análogos & derivados , Captopril/farmacologia , Modelos Animais de Doenças , Enalapril/análogos & derivados , Enalapril/sangue , Enalapril/farmacologia , Frequência Cardíaca/efeitos dos fármacos , Isoproterenol/farmacologia , Masculino , Infarto do Miocárdio/sangue , Infarto do Miocárdio/patologia , Miocárdio/patologia , Ratos , Ratos Endogâmicos
15.
Cardiovasc Res ; 30(3): 386-93, 1995 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-7585830

RESUMO

OBJECTIVES: The purpose of this study was to investigate the changes in beta-adrenoceptor density (Bmax) and distribution in a model of chronic myocardial infarction in rats, and to relate possible changes to hemodynamic and neurohumoral abnormalities. In addition, we examined the effects of 8 weeks treatment with ibopamine and captopril. METHODS: There were 3 experiments: (1) Bmax and plasma catecholamines were examined (n = 46), (2) Bmax was compared in infarcted and non-infarcted tissue (n = 13), and (3) contractile function was evaluated by isolated heart perfusion (n = 40). Of rats in Expts. (1) and (3), 50% had myocardial infarction induced by coronary ligation and 50% were controls. Each group was divided between ibopamine, ibopamine and captopril, or standard (no drug) treatment. RESULTS: Bmax was not decreased in rats with myocardial infarction (10.8 +/- 0.8 fmol/mg protein), compared to normal rats (11.4 +/- 0.6 fmol/mg protein), and the ratio beta 1/beta 2 was also unaffected. In infarcted tissue, Bmax was significantly (P = 0.03) lower than in non-infarcted tissue. Baseline left ventricular pressure, systolic and diastolic dP/dT were all impaired (P < 0.001), and plasma norepinephrine levels were elevated in rats with myocardial infarction (16.03 +/- 230 vs. 1287 +/- 83 pg/ml; P < 0.05), compared to normals. Both ibopamine alone and in combination with captopril reduced the elevated plasma norepinephrine levels in infarcted rats (P < 0.001), but only the combination of the 2 drugs significantly increased Bmax in infarcted rats (14.7 +/- 0.8 fmol/mg protein; P = 0.03 vs. untreated myocardial infarction), while ibopamine alone had no significant effect (13.1 +/- 1.1 fmol/mg protein; p = ns). Also, active drug treatment had no significant effect on the hemodynamic changes. CONCLUSIONS: In this coronary artery ligation model of myocardial infarction in rats, no beta-adrenoceptor down-regulation is observed, despite marked abnormalities in baseline left ventricular function and plasma norepinephrine levels. The combination of ibopamine and captopril significantly increases Bmax in infarcted rats, which is accompanied by a reduction in plasma norepinephrine levels, but not by an improvement in hemodynamic parameters.


Assuntos
Desoxiepinefrina/análogos & derivados , Agonistas de Dopamina/farmacologia , Hemodinâmica/efeitos dos fármacos , Infarto do Miocárdio/metabolismo , Neurotransmissores/metabolismo , Receptores Adrenérgicos beta/efeitos dos fármacos , Agonistas Adrenérgicos beta/farmacologia , Inibidores da Enzima Conversora de Angiotensina/farmacologia , Animais , Captopril/farmacologia , Doença Crônica , Desoxiepinefrina/farmacologia , Modelos Animais de Doenças , Quimioterapia Combinada , Frequência Cardíaca/efeitos dos fármacos , Isoproterenol/farmacologia , Masculino , Infarto do Miocárdio/sangue , Infarto do Miocárdio/tratamento farmacológico , Norepinefrina/sangue , Ratos , Ratos Wistar , Receptores Adrenérgicos beta/metabolismo , Pressão Ventricular/efeitos dos fármacos
16.
Hypertension ; 29(2): 539-43, 1997 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-9040435

RESUMO

Echocardiographic determination of left ventricular mass index (LVMI) is shown to be valuable in the assessment of cardiovascular risk. Determination of left ventricular geometry, including concentric remodeling, provides additional prognostic information. In isolated systolic hypertension (ISH), the few echocardiographic studies available show an increased LVMI, but criteria and patient populations differ. No comparison with diastolic hypertension (DH) has been made, nor has left ventricular geometry (with concentric remodeling) been evaluated. We compared both LVMI and left ventricular geometry of newly diagnosed ISH subjects with normotensive and DH subjects, all previously untreated and from the same population. The echocardiographic LVMI of 97 previously untreated ISH subjects (4 x systolic pressure > or = 160 mm Hg, diastolic pressure < 95 mm Hg) was clearly elevated compared with values in age- and sex-matched normotensive subjects (98 and 71 g/m2, respectively; P < .001). The geometric pattern was abnormal in most ISH subjects, with a high prevalence (43%) of concentric remodeling. Both LVMI and left ventricular geometry of ISH subjects did not differ significantly from values in DH subjects (LVMI, 92 g/m2; concentric remodeling, 56%). Sex differences in LV geometry in ISH were present only with the Framingham criteria, not with the Koren criteria. This study shows a high prevalence of concentric remodeling in elderly individuals with previously untreated ISH. The increase of LVMI and abnormality in left ventricular geometry are comparable with those in DH subjects, further defining the place of ISH as a cardiovascular risk factor in the elderly. Whether there are sex differences in cardiac adaptation in ISH and whether the geometric classification can be used to adjust treatment remain to be investigated.


Assuntos
Hipertensão/diagnóstico por imagem , Hipertensão/fisiopatologia , Hipertrofia Ventricular Esquerda/diagnóstico por imagem , Hipertrofia Ventricular Esquerda/fisiopatologia , Sístole , Função Ventricular Esquerda , Fatores Etários , Idoso , Estudos de Casos e Controles , Diástole , Feminino , Hemodinâmica , Humanos , Hipertensão/complicações , Hipertrofia Ventricular Esquerda/etiologia , Masculino , Pessoa de Meia-Idade , Fatores Sexuais , Ultrassonografia
17.
J Hypertens ; 19(2): 303-9, 2001 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-11212974

RESUMO

OBJECTIVE: To compare the effects of a calcium antagonist (amlodipine) and an angiotensin converting enzyme inhibitor (lisinopril) on left ventricular mass and diastolic function in elderly, previously untreated hypertensives. DESIGN: A double-blind randomized parallel group trial. Effects of amlodipine and lisinopril on left ventricular mass and diastolic function (E/A Ratio) (The ELVERA trial). SETTING: Rural northern Netherlands: population screening new diagnosed hypertensive subjects. PATIENTS: The study population comprised 166 newly diagnosed hypertensive (aged 60-75) with diastolic blood pressure between 95-115 mmHg and/or systolic blood pressure between 160-220 mmHg. INTERVENTION: Patients were randomly allocated to receive 5-10 mg amlodipine or 10-20 mg lisinopril for 2 years. MAIN OUTCOME MEASURES: Prior and after 1 and 2 years of treatment left ventricular mass, indexed by body surface (LVMI) was estimated by 2-D mode echocardiography according to Devereux with use of Penn convention. Early to atrial filling ratio (E/A) was assessed by transmitral flow. Change from baseline of LVMI and E/A ratio was evaluated by repeated measurement analysis of the treatment effect in an intention-to-treat analysis. RESULTS: Both amlodipine and lisinopril led to equivalent reduction in systolic and diastolic blood pressure. At the end of the study the amlodipine group led to LVMI decrease by 21.8 g/m < or = [95% confidence interval (CI), 18.3-25.3] and E/A ratio increased by 0.08 (95% CI, 0.05-0.11). In the lisinopril group LVMI decreased by 22.4 g/m < or = (95%, CI, 19.0-25.8) and E/A ratio increased by 0.07 (95% CI, 0.04-0.10). No statistically significant differences were found in changes in LVMI and E/A ratio between amlodipine and lisinopril. CONCLUSION: A long-term study, the ELVERA trial proves that amlodipine and lisinopril reduce left ventricular mass and improve diastolic function to a similar extent in elderly newly diagnosed hypertensive patients.


Assuntos
Anlodipino/uso terapêutico , Inibidores da Enzima Conversora de Angiotensina/uso terapêutico , Bloqueadores dos Canais de Cálcio/uso terapêutico , Diástole/efeitos dos fármacos , Hipertensão/tratamento farmacológico , Hipertrofia Ventricular Esquerda/tratamento farmacológico , Lisinopril/uso terapêutico , Idoso , Anlodipino/efeitos adversos , Método Duplo-Cego , Feminino , Humanos , Hipertensão/complicações , Hipertensão/fisiopatologia , Lisinopril/efeitos adversos , Masculino , Pessoa de Meia-Idade
18.
Am J Cardiol ; 59(10): 164D-170D, 1987 Apr 24.
Artigo em Inglês | MEDLINE | ID: mdl-3034026

RESUMO

Acute hemodynamic and hormonal responses to ramipril in comparison with captopril were studied in 10 patients with moderate to severe congestive heart failure in an open, randomized study. Both drugs were given to 5 patients each in 2 increasing doses on 2 successive days. After 5 mg of ramipril angiotensin converting enzyme (ACE) activity was significantly decreased during 24 hours with a maximum decrease 4 hours after administration. Mean arterial blood pressure decreased from 84 +/- 5 to 62 +/- 5 mm Hg at 4 hours and 71 +/- 4 mm Hg at 12 hours, respectively, after this dose. Capillary wedge pressure decreased from 19 +/- 1 mm Hg to 13 +/- 1 mm Hg at 4 hours with a maximum increase in cardiac output from 3.8 +/- 0.3 liters/min to 4.4 +/- 0.3 liters/min at 2 hours. No significant cardiac effects were present 8 hours after administration. After 10 mg of ramipril, cardiac and hormonal effects showed a quicker onset of action and longer duration compared with the 5 mg dose. Mean arterial pressure decreased to 61 +/- 6 mm Hg. Similar effects were seen after captopril, but with a significantly shorter duration. Mean arterial pressure decreased from 82 +/- 4 mm Hg to 64 +/- 5 mm Hg after 12.5 mg and to 58 +/- 6 mm Hg after 25 mg of captopril. In patients with congestive heart failure ramipril has the hemodynamic profile of a long-acting and potent ACE inhibitor. Significant cardiac effects are present during 4 to 8 hours and ACE activity is still significantly inhibited 24 hours after a single dose of ramipril.(ABSTRACT TRUNCATED AT 250 WORDS)


Assuntos
Inibidores da Enzima Conversora de Angiotensina , Pressão Sanguínea/efeitos dos fármacos , Compostos Bicíclicos com Pontes/uso terapêutico , Hidrocarbonetos Aromáticos com Pontes/uso terapêutico , Captopril/uso terapêutico , Insuficiência Cardíaca/tratamento farmacológico , Sistema Renina-Angiotensina/efeitos dos fármacos , Idoso , Compostos Bicíclicos com Pontes/efeitos adversos , Doença Crônica , Insuficiência Cardíaca/metabolismo , Insuficiência Cardíaca/fisiopatologia , Humanos , Pessoa de Meia-Idade , Ramipril , Distribuição Aleatória
19.
Am J Cardiol ; 70(3): 359-63, 1992 Aug 01.
Artigo em Inglês | MEDLINE | ID: mdl-1632403

RESUMO

To compare the value of the New York Heart Association (NYHA) classification and measurement of peak oxygen consumption (VO2) in the assessment of functional status and prognosis in patients with mild to moderate chronic congestive heart failure (CHF), 94 patients with clinically stable NYHA class II and III CHF were prospectively studied. In all patients, left ventricular ejection fraction was less than or equal to 40% (mean 22 +/- 9); 49 patients were in NYHA class II, and 45 were in NYHA class III. Mean peak VO2 was 17 +/- 5 ml/min/kg. During a follow-up period of 23 +/- 11 months, 21 patients died. The 1-, 2- and 3-year cumulative survival rates for the 94 patients were 88, 79 and 69%, respectively. Functional status, as assessed both by peak VO2 and NYHA classification, and left ventricular ejection fraction were significantly worse in the group of nonsurvivors. The most powerful independent predictor of mortality was peak VO2. Although mean peak VO2 was significantly higher in NYHA class II than in NYHA class III (20 +/- 4 vs 13 +/- 3 ml/min/kg, p less than 0.0001), categorization into subgroups on the basis of the attained peak VO2 revealed a marked discrepancy with the NYHA classification. Nevertheless, the survival curves of patients subdivided at a peak VO2 of 16 ml/min/kg showed a strong resemblance with survival curves of both NYHA classes.(ABSTRACT TRUNCATED AT 250 WORDS)


Assuntos
Cardiomiopatia Dilatada/complicações , Doença das Coronárias/complicações , Insuficiência Cardíaca/mortalidade , Consumo de Oxigênio , Idoso , Feminino , Insuficiência Cardíaca/classificação , Insuficiência Cardíaca/etiologia , Insuficiência Cardíaca/fisiopatologia , Humanos , Masculino , Pessoa de Meia-Idade , Prognóstico , Estudos Prospectivos , Fatores de Risco , Volume Sistólico , Taxa de Sobrevida
20.
Am J Cardiol ; 79(7): 978-80, 1997 Apr 01.
Artigo em Inglês | MEDLINE | ID: mdl-9104918

RESUMO

To study the prognostic value of heart rate (HR) variability in heart failure, risk assessment of clinical and HR variability parameters was performed in 159 patients with stable chronic heart failure. Besides low left ventricular ejection fraction, HR variability parameters reflecting impaired vagal tone (SDNN, pNN50) were found to predict an increased risk of cardiac death and death due to progressive pump failure.


Assuntos
Cardiomiopatia Dilatada/mortalidade , Morte Súbita Cardíaca/epidemiologia , Insuficiência Cardíaca/mortalidade , Frequência Cardíaca/fisiologia , Cardiomiopatia Dilatada/complicações , Cardiomiopatia Dilatada/diagnóstico , Eletrocardiografia Ambulatorial , Insuficiência Cardíaca/diagnóstico , Insuficiência Cardíaca/etiologia , Humanos , Pessoa de Meia-Idade , Valor Preditivo dos Testes , Prognóstico , Modelos de Riscos Proporcionais , Fatores de Risco , Volume Sistólico , Análise de Sobrevida
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA