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1.
JACC Adv ; 2(5)2023 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-37575202

RESUMO

We review a comprehensive risk assessment approach for percutaneous coronary interventions in older adults and highlight the relevance of geriatric syndromes within that broader perspective to optimize patient-centered outcomes in interventional cardiology practice. Reflecting the influence of geriatric principles in older adults undergoing percutaneous coronary interventions, we propose a "geriatric" heart team to incorporate the expertise of geriatric specialists in addition to the traditional heart team members, facilitate uptake of the geriatric risk assessment into the preprocedural risk assessment, and address ways to mitigate these geriatric risks. We also address goals of care in older adults, highlighting common priorities that can impact shared decision making among older patients, as well as frequently encountered pharmacotherapeutic considerations in the older adult population. Finally, we clarify gaps in current knowledge and describe crucial areas for future investigation.

2.
JACC Adv ; 2(4)2023 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-37584013

RESUMO

As the population ages, older adults represent an increasing proportion of patients referred to the cardiac catheterization laboratory. Older adults are the highest-risk group for morbidity and mortality, particularly after complex, high-risk percutaneous coronary interventions. Structured risk assessment plays a key role in differentiating patients who are likely to derive net benefit vs those who have disproportionate risks for harm. Conventional risk assessment tools from national cardiovascular societies typically rely on 3 pillars: 1) cardiovascular risk; 2) physiologic and hemodynamic risk; and 3) anatomic and procedural risks. We propose adding a fourth pillar: geriatric syndromes, as geriatric domains can supersede all other aspects of risk.

3.
J Cardiovasc Dev Dis ; 9(11)2022 Oct 31.
Artigo em Inglês | MEDLINE | ID: mdl-36354772

RESUMO

This review focuses on the maternal cardiovascular risk and outcomes of pregnancy in childhood, adolescent, and young adult cancer survivors who are achieving survival to their prime reproductive years. Childhood, adolescent, and young adult cancer survivors are a growing population and have increasing needs for reproductive care over decades of life. Female cancer survivors have an overall higher risk of maternal cardiovascular events compared to those without a history of cancer. In female cancer survivors with normal cardiac function before pregnancy, the incidence of new heart failure during pregnancy is low. In survivors with cardiotoxicity prior to pregnancy, the risk of heart failure during and immediately after pregnancy is much higher. We recommend cardiomyopathy surveillance with echocardiography before pregnancy for all female survivors treated with anthracyclines and chest radiation. Survivors with cardiotoxicity prior to pregnancy should be cared for by an expert multidisciplinary team, including obstetrics, cardiology, anesthesia, and specialized nursing, among others.

4.
J Cardiovasc Dev Dis ; 9(8)2022 Aug 06.
Artigo em Inglês | MEDLINE | ID: mdl-36005414

RESUMO

Peripartum cardiomyopathy (PPCM) is idiopathic systolic congestive heart failure around pregnancy. Comparisons with matched controls are lacking. We investigated maternal characteristics and outcomes up to 12 months in a cohort admitted to Montefiore Health System in Bronx, New York 1999−2015 (n = 53 cases and n = 92 age and race-matched controls, >80% Black or Hispanic/Latina). Compared to peers, women with PPCM had more chronic hypertension (24.5% vs. 8.8%, p = 0.001), prior gestational hypertension (20.8% vs. 5.4%, p = 0.001), prior preeclampsia (17.0% vs. 3.3%, p = 0.001), familial dilated cardiomyopathy (5.7% vs. 0.0%, p = 0.04), smoking (15.1% vs. 2.2%, p = 0.001), lower summary socioeconomic scores (−4.12 (IQR −6.81, −2.13) vs. −1.62 (IQR −4.20, −0.74), p < 0.001), public insurance (67.9% vs. 29.3% p = 0.001), and frequent depressive symptoms. Women with PPCM were often admitted antepartum (34.0% vs. 18.5%, p = 0.001) and underwent Cesarean section (65.4% vs. 30.4%, p = 0.001), but had less preterm labor (27.3% vs. 51.1%, p = 0.001). Women were rarely treated with bromocriptine (3.8%), frequently underwent left ventricular assist device placement (9.4% and n = 2 with menorrhagia requiring transfusion and progesterone) or heart transplantation (3.8%), but there were no in-hospital deaths. In sum, women with PPCM had worse socioeconomic disadvantage and baseline health than matched peers. Programs addressing social determinants of health may be important for women at high risk of PPCM.

5.
Arterioscler Thromb Vasc Biol ; 42(10): 1272-1282, 2022 10.
Artigo em Inglês | MEDLINE | ID: mdl-35979837

RESUMO

BACKGROUND: Aortic valve calcification (AVC) shares pathological features with atherosclerosis. Lipoprotein components have been detected in aortic valve tissue, including HDL (high-density lipoprotein). HDL measures have inverse associations with cardiovascular disease, but relationships with long-term AVC progression are unclear. We investigated associations of HDL cholesterol, HDL-particle number and size, apoC3-defined HDL subtypes, and, secondarily, CETP (cholesteryl ester transfer protein) mass and activity, with long-term incidence and progression of AVC. METHODS: We used linear mixed-effects models to evaluate the associations of baseline HDL indices with AVC. AVC was quantified by Agatston scoring of up to 3 serial computed tomography scans over a median of 8.9 (maximum 11.2) years of follow-up in the Multi-Ethnic Study of Atherosclerosis (n=6784). RESULTS: After adjustment, higher concentrations of HDL-C (high-density lipoprotein cholesterol), HDL-P (HDL particles), large HDL-P, and apoC3-lacking HDL-C were significantly associated with lower incidence/progression of AVC. Neither small or medium HDL-P nor apoC3-containing HDL-C was significantly associated with AVC incidence/progression. When included together, a significant association was observed only for HDL-C, but not for HDL-P. Secondary analyses showed an inverse relationship between CETP mass, but not activity, and AVC incidence/progression. In exploratory assessments, inverse associations for HDL-C, HDL-P, large HDL-P, and apoC3-lacking HDL with AVC incidence/progression were more pronounced for older, male, and White participants. ApoC3-containing HDL-C only showed a positive association with AVC in these subgroups. CONCLUSIONS: In a multiethnic population, HDL-C, HDL-P, large HDL-P, and apoC3-lacking HDL-C were inversely associated with long-term incidence and progression of AVC. Further investigation of HDL composition and mechanisms could be useful in understanding pathways that slow AVC.


Assuntos
Estenose da Valva Aórtica , Aterosclerose , Valva Aórtica/diagnóstico por imagem , Valva Aórtica/patologia , Estenose da Valva Aórtica/epidemiologia , Aterosclerose/complicações , Aterosclerose/diagnóstico por imagem , Aterosclerose/epidemiologia , Calcinose , Proteínas de Transferência de Ésteres de Colesterol , HDL-Colesterol , Humanos , Incidência , Lipoproteínas HDL , Masculino
6.
Coron Artery Dis ; 33(3): 206-212, 2022 05 01.
Artigo em Inglês | MEDLINE | ID: mdl-34049323

RESUMO

BACKGROUND: Higher residual anatomic disease was associated with increased mortality in a recent randomized controlled trial of revascularization after ST-elevation myocardial infarction (STEMI). Less is known about the impact of residual disease post-STEMI in race-ethnic minorities. METHODS: Synergy Between Percutaneous Coronary Intervention With Taxus and Cardiac Surgery (SYNTAX)- II (SS-II) score is an established scoring method for anatomic disease and prevalent co-morbidities to describe patient complexity. We evaluated residual (r) SS-II in 165 patients from a single center urban US registry (n = 1208) presenting for primary percutaneous coronary intervention of STEMI and treated for 3-vessel or left main and any combination of 0, 1, 2 or 3-vessel disease. RESULTS: The median age was 62 years (IQR 52-70), 29.1% women, 44.9% Hispanic/Latino and 19.4% non-Hispanic Black. Over median of 4.9 years (IQR 2.9-6.3), higher rSS-II was associated with increased death [hazard ratio 2.46 per SD increment in log rSS-II (~five-fold increment on the original scale) 95% CI 1.51, 3.99], death or all-cause readmission (hazard ratio 1.37 per SD increment in log rSS-II 95% CI, 1.11-1.70) and death or cardiovascular disease readmission (hazard ratio 1.46 per SD increment in log rSS-II 95% CI, 1.14-1.88). rSS-II was higher in older women with more co-morbidities, but not different by race-ethnicity. CONCLUSIONS: In summary, higher rSS-II was associated with long-term outcomes post-STEMI in a prospective urban, minority cohort, suggesting a potential role for risk stratification with this measure in a non-trial setting.


Assuntos
Intervenção Coronária Percutânea , Infarto do Miocárdio com Supradesnível do Segmento ST , Idoso , Angiografia Coronária , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Intervenção Coronária Percutânea/efeitos adversos , Estudos Prospectivos , Sistema de Registros , Fatores de Risco , Infarto do Miocárdio com Supradesnível do Segmento ST/diagnóstico , Infarto do Miocárdio com Supradesnível do Segmento ST/cirurgia , Resultado do Tratamento
7.
Atherosclerosis ; 335: 126-134, 2021 10.
Artigo em Inglês | MEDLINE | ID: mdl-34511241

RESUMO

BACKGROUND AND AIMS: Bone and mineral metabolism has been implicated in the pathophysiology of cardiac valve calcification. Whether bone demineralization, a common aging-related disorder, promotes calcific valve disease remains uncertain. We tested the hypothesis that low bone mineral density (BMD) is associated with greater incidence/progression of cardiac valve calcification in the Multi-Ethnic Study of Atherosclerosis. METHODS: Using linear mixed-effects models, we related baseline measurement of BMD of the thoracic vertebrae by computed tomography (CT) in 6768 participants to serial CT assessments of aortic valve calcification (AVC) and mitral annular calcification (MAC) obtained over a >10-year period. RESULTS: After multivariable adjustment, lower BMD (per SD decrement) was associated with accelerated increase in AVC over time in women (0.76 [95% CI 0.42,1.09] Agatston -units [AU]/year) and men (1.41 [95% CI 0.48,2.33] AU/year), as well as for MAC in women (3.22 [95% CI 1.16,5.28] AU/year) and men (3.59 [95% CI 2.09,5.09] AU/year). Significant effect modification was observed, with more pronounced BMD-related acceleration of AVC and MAC progression in older or white participants of one or both sexes, as well as by estimated glomerular filtration rate, though the latter differed by sex for AVC and MAC. CONCLUSIONS: In this multi-ethnic cohort, low thoracic BMD was significantly, but modestly, associated with increased AVC and MAC progression. This suggests that altered bone mineral metabolism does not have a major impact on calcific valve disease in the general population, but the possibility of a more meaningful influence in higher-risk individuals with osteoporosis will require further investigation.


Assuntos
Estenose da Valva Aórtica , Aterosclerose , Calcinose , Doenças das Valvas Cardíacas , Idoso , Valva Aórtica/diagnóstico por imagem , Estenose da Valva Aórtica/diagnóstico por imagem , Aterosclerose/diagnóstico por imagem , Densidade Óssea , Calcinose/diagnóstico por imagem , Feminino , Doenças das Valvas Cardíacas/diagnóstico por imagem , Humanos , Masculino
8.
Atherosclerosis ; 311: 60-66, 2020 10.
Artigo em Inglês | MEDLINE | ID: mdl-32947199

RESUMO

BACKGROUND: HIV and HCV have been linked to an increased risk of cardiovascular disease (CVD). Their impact on long-term outcomes following ST-segment myocardial infarction (STEMI) has not been previously studied. METHODS: We leveraged data from a STEMI registry (n = 1208) at an inner-city health system to assess the influence of HIV and HCV on post-STEMI outcomes. Cox regression was used to compare HIV-monoinfected (n = 22), HCV-monoinfected (n = 26) and HIV-HCV-coinfected patients (n = 8) with the neither-infected group (n = 1152) with regard to death, death or any readmission, and death or CVD readmission. RESULTS: The cohort was majority black or Hispanic. Median follow-up was 4.3 years. Compared to the neither-infected group, the HIV-monoinfected group showed near-significantly higher risks of death or any readmission (HR = 1.62, 95% CI = 0.96, 2.74) and death or CVD readmission (HR = 1.82, 95% CI = 0.98, 3.39) after full adjustment. On similar comparison, the HCV-monoinfected group exhibited significantly higher risks of death (HR = 2.09, 95% CI = 1.05, 4.15) and death or any readmission (HR = 1.68, 95% CI = 1.07, 2.65), whereas the HIV-HCV-coinfected group showed higher risk of death (HR = 6.51, 95% CI = 2.28, 18.61). CONCLUSIONS: In this cohort composed mostly of race-ethnic minorities, HIV monoinfection tended to be associated with 1.6-to-1.8-fold higher risk of death or readmission for any cause or CVD over long-term follow-up compared to neither infection, whereas HCV monoinfection was associated with 1.7-to-2.1-fold higher risk of death and death or any readmission, and HIV-HCV coinfection with 6.5-fold higher risk of death. These associations require further study in larger populations, but highlight the importance of identifying and treating HIV and HCV in patients presenting with STEMI.


Assuntos
Coinfecção , Infecções por HIV , Hepatite C Crônica , Hepatite C , Infarto do Miocárdio com Supradesnível do Segmento ST , HIV , Infecções por HIV/complicações , Infecções por HIV/diagnóstico , Infecções por HIV/epidemiologia , Hepacivirus , Hepatite C/complicações , Hepatite C/diagnóstico , Hepatite C/epidemiologia , Humanos , Infarto do Miocárdio com Supradesnível do Segmento ST/diagnóstico , Infarto do Miocárdio com Supradesnível do Segmento ST/epidemiologia , Populações Vulneráveis
9.
Clin Cardiol ; 43(10): 1100-1109, 2020 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-33460205

RESUMO

OBJECTIVES: To compare outcomes by age and sex in race/ethnic minorities presenting with ST-elevation myocardial infarction (STEMI), as studies are limited. METHODS: We studied sociodemographics, management, and outcomes in 1208 STEMI patients evaluated for primary percutaneous coronary intervention between 2008 and 2014 at Montefiore Health System (Bronx, NY). A majority of patients self-identified as nonwhite, and nearly two-thirds were young (<45 years) or middle-aged (45-64 years). RESULTS: Risk factors varied significantly across age groups; with more women and non-Hispanic whites, hypertension, diabetes, dyslipidemia, prior cardiovascular disease, non-sinus rhythm, and collagen vascular disease in the older age group (≥65 years); and higher body mass index, smoking, cocaine use, human immunodeficiency virus (HIV) infection and family history of heart disease in the young. Younger women had lower summary socioeconomic scores than younger men. Middle-aged women had more obesity and dysmetabolism, while men had more heavy alcohol use. There was greater disease severity with increasing age; with higher cardiac biomarkers, 3-vessel disease, cardiogenic shock, and coronary artery bypass grafting. Older patients had higher rates of death and death or readmission over 4.3 (interquartile range 2.4, 6.0) years of follow-up. Middle-aged women had higher rates of death or any readmission than men, but these differences were not significant after adjustment. CONCLUSIONS: These findings indicate a high burden of risk factors in younger adults with STEMI from an inner-city community. Programs to target sociobehavioral factors in disadvantaged settings, including substance abuse, obesity, and risk of HIV, are necessary to more effectively address health disparities in STEMI and its adverse consequences.


Assuntos
Hipertensão , Intervenção Coronária Percutânea , Infarto do Miocárdio com Supradesnível do Segmento ST , Fatores Etários , Idoso , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Intervenção Coronária Percutânea/efeitos adversos , Sistema de Registros , Fatores de Risco , Infarto do Miocárdio com Supradesnível do Segmento ST/diagnóstico , Infarto do Miocárdio com Supradesnível do Segmento ST/epidemiologia , Infarto do Miocárdio com Supradesnível do Segmento ST/terapia , Fatores Sexuais , Resultado do Tratamento
10.
Atherosclerosis ; 285: 79-86, 2019 06.
Artigo em Inglês | MEDLINE | ID: mdl-31048102

RESUMO

BACKGROUND AND AIMS: Previous research has implicated dysregulation of phosphate metabolism and calcium-phosphate solubilization in cardiovascular calcification, but epidemiologic studies evaluating longitudinal associations with valvular or annular calcification by computed tomography (CT), a highly sensitive imaging modality, are lacking. Our primary aim was to investigate the associations of mineral biomarkers with incidence and progression of aortic valve calcification (AVC) and mitral annular calcification (MAC). METHODS: We evaluated the associations of serum FGF-23 (n = 6547 participants), phosphate (n = 6547), and fetuin-A (n = 2550) measured at baseline in the community-based Multi-Ethnic Study of Atherosclerosis with AVC and MAC on CT performed at baseline and at a median of 2.4 (1.6, 3.1) years later. We used linear mixed-effects models to account simultaneously for prevalence, incidence and progression of AVC and MAC. RESULTS: After adjustment for demographic and clinical characteristics, a significant association was documented for FGF-23 with accelerated annual progression of MAC (2.83 Agatston units (AU), 95% CI = 0.49, 5.17 AU, per standard deviation (18.46 pg/mL) of FGF-23), but this was not seen for phosphate or fetuin-A. None of these biomarkers was associated with accelerated annual progression of AVC. CONCLUSIONS: This study provides evidence relating serum FGF-23 to accelerated annual MAC progression. Whether this mineral regulator is a risk marker or is involved in pathogenesis merits further investigation.


Assuntos
Estenose da Valva Aórtica/sangue , Valva Aórtica/patologia , Aterosclerose/sangue , Calcinose/sangue , Fatores de Crescimento de Fibroblastos/sangue , Doenças das Valvas Cardíacas/sangue , Valva Mitral , Adulto , Idoso , Idoso de 80 Anos ou mais , Valva Aórtica/diagnóstico por imagem , Valva Aórtica/metabolismo , Estenose da Valva Aórtica/diagnóstico por imagem , Estenose da Valva Aórtica/epidemiologia , Estenose da Valva Aórtica/metabolismo , Aterosclerose/diagnóstico por imagem , Aterosclerose/epidemiologia , Aterosclerose/metabolismo , Biomarcadores/sangue , Calcinose/diagnóstico por imagem , Calcinose/epidemiologia , Calcinose/metabolismo , Progressão da Doença , Etnicidade , Feminino , Fator de Crescimento de Fibroblastos 23 , Doenças das Valvas Cardíacas/diagnóstico por imagem , Doenças das Valvas Cardíacas/epidemiologia , Doenças das Valvas Cardíacas/metabolismo , Humanos , Incidência , Masculino , Pessoa de Meia-Idade , Minerais/metabolismo , Valva Mitral/diagnóstico por imagem , Estudos Prospectivos , Tomografia Computadorizada por Raios X , Estados Unidos/epidemiologia
11.
Am J Cardiol ; 120(3): 473-478, 2017 Aug 01.
Artigo em Inglês | MEDLINE | ID: mdl-28583687

RESUMO

Serum 25-hydroxyvitamin D [25(OH)D] concentration has been identified as a possible modifiable risk factor for cardiovascular disease (CVD). We hypothesized that serum 25(OH)D concentration would be associated with calcifications of the left-sided heart valves, which are markers of CVD risk. Aortic valve calcium (AVC) and mitral annular calcium (MAC) were quantified from cardiac computed tomography scans performed on 5,530 Multi-Ethnic Study of Atherosclerosis participants at the baseline examination (2000 to 2002) and at a follow-up visit at either Examination 2 (2002 to 2004) or Examination 3 (2004 to 2005). 25(OH)D was measured from serum samples collected at the baseline examination. Using relative risk regression, we evaluated the multivariable-adjusted risk of prevalent and incident AVC and MAC in this ethnically diverse population free of clinical CVD at baseline. The mean age of participants was 62 ± 10 years; 53% were women, 40% white, 26% black, 21% Hispanic, and 12% Chinese. Prevalent AVC and MAC were observed in 12% and 9% of study sample, respectively. There were no significant associations between 25(OH)D and prevalent AVC or MAC. Over a mean follow-up of 2.5 years, 4% developed incident AVC and 5% developed incident MAC. After adjusting for demographic variables, each 10 ng/ml higher serum 25(OH)D was associated with a 15% (relative risk 0.85, 95% confidence interval 0.74 to 0.98) lower risk of incident MAC but not AVC. However, this association was no longer significant after adjusting for lifestyle and CVD risk factors. Results suggest a possible link between serum 25(OH)D and the risk for incident MAC, but future studies with longer follow-up are needed to further test this association.


Assuntos
Valva Aórtica/diagnóstico por imagem , Aterosclerose/sangue , Calcinose/etiologia , Etnicidade , Doenças das Valvas Cardíacas/etiologia , Valva Mitral/diagnóstico por imagem , Vitamina D/análogos & derivados , Idoso , Idoso de 80 Anos ou mais , Aterosclerose/etnologia , Aterosclerose/metabolismo , Calcinose/etnologia , Calcinose/metabolismo , Cálcio/metabolismo , Feminino , Seguimentos , Doenças das Valvas Cardíacas/etnologia , Doenças das Valvas Cardíacas/metabolismo , Humanos , Incidência , Masculino , Pessoa de Meia-Idade , Prevalência , Estudos Retrospectivos , Fatores de Risco , Tomografia Computadorizada por Raios X , Estados Unidos/epidemiologia , Vitamina D/sangue
12.
Arch Osteoporos ; 12(1): 52, 2017 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-28560501

RESUMO

Associations between bone mineral density and aortic valvular, aortic annular, and mitral annular calcification were investigated in a cross-sectional analysis of a population-based cohort of 1497 older adults. Although there was no association between continuous bone mineral density and outcomes, a significant association between osteoporosis and aortic valvular calcification in men was found. INTRODUCTION: The process of cardiac calcification bears a resemblance to skeletal bone metabolism and its regulation. Experimental studies suggest that bone mineral density (BMD) and valvular calcification may be reciprocally related, but epidemiologic data are sparse. METHODS: We tested the hypothesis that BMD of the total hip and femoral neck measured by dual-energy X-ray absorptiometry (DXA) is inversely associated with prevalence of three echocardiographic measures of cardiac calcification in a cross-sectional analysis of 1497 older adults from the Cardiovascular Health Study. The adjusted association of BMD with aortic valve calcification (AVC), aortic annular calcification (AAC), and mitral annular calcification (MAC) was assessed with relative risk (RR) regression. RESULTS: Mean (SD) age was 76.2 (4.8) years; 58% were women. Cardiac calcification was highly prevalent in women and men: AVC, 59.5 and 71.0%; AAC 45.1 and 46.7%; MAC 42.8 and 39.5%, respectively. After limited and full adjustment for potential confounders, no statistically significant associations were detected between continuous BMD at either site and the three measures of calcification. Assessment of WHO BMD categories revealed a significant association between osteoporosis at the total hip and AVC in men (adjusted RR compared with normal BMD = 1.24 (1.01-1.53)). In graded sensitivity analyses, there were apparent inverse associations between femoral neck BMD and AVC with stenosis in men, and femoral neck BMD and moderate/severe MAC in women, but these were not significant. CONCLUSION: These findings support further investigation of the sex-specific relationships between low BMD and cardiac calcification, and whether processes linking the two could be targeted for therapeutic ends.


Assuntos
Densidade Óssea/fisiologia , Calcinose/fisiopatologia , Doenças das Valvas Cardíacas/fisiopatologia , Absorciometria de Fóton , Idoso , Idoso de 80 Anos ou mais , Valva Aórtica/patologia , Valva Aórtica/fisiopatologia , Estenose da Valva Aórtica/epidemiologia , Estenose da Valva Aórtica/fisiopatologia , Calcinose/epidemiologia , Estudos de Coortes , Estudos Transversais , Feminino , Colo do Fêmur/fisiopatologia , Doenças das Valvas Cardíacas/epidemiologia , Articulação do Quadril/fisiopatologia , Humanos , Masculino , Pessoa de Meia-Idade , Estenose da Valva Mitral/epidemiologia , Estenose da Valva Mitral/fisiopatologia , Osteoporose/epidemiologia , Osteoporose/fisiopatologia , Prevalência , Fatores Sexuais , Estados Unidos/epidemiologia
13.
Arq. bras. cardiol ; 88(5): 531-536, maio 2007. tab, graf
Artigo em Português | LILACS | ID: lil-453043

RESUMO

OBJETIVO: Definir o valor prognóstico e a custo-efetividade do teste ergométrico (TE) em comparação à cintilografia de perfusão miocárdica com dipiridamol (DIP) em indivíduos com > 75 anos de idade. MÉTODOS: Foram avaliados, consecutiva e prospectivamente, 66 pacientes (40 por cento homens), com média de idade de 81 ± 5 anos. Desses pacientes, 57 por cento eram hipertensos, 38 por cento eram dislipidêmicos e 28 por cento, diabéticos. O protocolo de Bruce para rampa foi adaptado, obtendo-se o valor prognóstico do TE pelo escore de Duke. RESULTADOS: A duração do TE, o porcentual da freqüência cardíaca máxima preconizada e o duplo produto no pico do exercício foram, respectivamente, de 7 ± 3 minutos, 95 ± 9 por cento e 24.946 ± 4.576 (bpm x mmHg). O TE e a DIP apresentaram resultados positivos para isquemia miocárdica similares (21 por cento vs 15 por cento, respectivamente). A concordância entre os testes foi de 88 por cento (Kappa 0,63, p < 0,01). Durante 685 ± 120 dias, ocorreram nove eventos maiores: seis óbitos, duas síndromes coronarianas agudas e uma revascularização miocárdica. As variáveis associadas aos eventos maiores foram: idade (83 ± 6 anos vs 80 ± 4 anos; p = 0,048); sexo masculino (78 por cento vs 33 por cento; p = 0,02); infradesnível do ST (1,0 ± 1,0 mm vs 0,25 ± 0,6 mm; p = 0,01); escore de Duke alto e intermediário, unificados num único grupo (44 vs 2 por cento; p = 0,001); e DIP anormal (44 por cento vs 10 por cento; p = 0,02). CONCLUSÃO: O TE, nessa população muito idosa, foi eficaz, factível e diagnóstico, de forma semelhante à DIP, porém com maior predição de eventos maiores e com custo inferior.


OBJECTIVE: To define the prognostic value and cost-effectiveness of the treadmill stress test (TST) in comparison to the dipyridamole myocardial perfusion scintigraphy (DIP), in individuals >75 years of age. METHODS: Consecutive and prospective assessment of 66 patients (40 percent male) aged 81 ± 5 years of which 57 percent were hypertensive, 38 percent had dyslipidemia and 28 percent were diabetics. The Bruce protocol was adapted for a tilt treadmill and the TST prognostic value was obtained using the Duke treadmill score. RESULTS: The TST duration, recommended maximum heart rate percentage and double product at peak exercise were respectively: 7 ± 3 minutes, 95 ± 9 percent and 24,946 ± 4,576 (bpm x mmHg). The TST and DIP presented similar positive results for myocardial ischemia (21 percent vs 15 percent, respectively). The correlation between the tests was 88 percent (Kappa 0.63, p<0.01). During 685 ± 120 days of follow-up, nine major events occurred: 6 deaths, 2 acute coronary syndromes and 1 myocardial revascularization. The variables associated with the major events were: age (83 ± 6 vs 80 ± 4 years; p=0.048), male gender (78 percent vs 33 percent; p=0.02), ST segment depression (1 ± 1 mm vs 0.25 ± 0.6 mm; p= 0.01), high or intermediate risk determined by the Duke treadmill score - combined in one group (44 percent vs 2 percent; p=0.001) and abnormal DIP (44 percent vs 10 percent, p= 0.02). CONCLUSION: For this elderly population, the TST was an efficient and viable option with a similar diagnostic value in comparison to the DIP. However, the TST was more accurate in the prediction of major events and offers a lower cost.


Assuntos
Idoso , Idoso de 80 Anos ou mais , Feminino , Humanos , Masculino , Doença das Coronárias/diagnóstico , Teste de Esforço , Reperfusão Miocárdica/métodos , Análise Custo-Benefício , Doença das Coronárias , Dipiridamol , Estudos de Viabilidade , Valor Preditivo dos Testes , Prognóstico , Estudos Prospectivos , Vasodilatadores
14.
FEBS Lett ; 579(29): 6537-42, 2005 Dec 05.
Artigo em Inglês | MEDLINE | ID: mdl-16289478

RESUMO

We investigated the interaction of oxidized low density lipoprotein (OxLDL) with the ATP-binding cassette A1 (ABCA1) pathway in J774 macrophages. Cellular efflux to apolipoprotein AI (apo-AI) of OxLDL-derived cholesterol was lower than efflux of cholesterol derived from acetylated low density lipoprotein (AcLDL). ABCA1 upregulation by 8-(4-chlorophenylthio)adenosine 3':5'-cyclic monophosphate (cpt-cAMP) or 22 (R)-hydroxycholesterol (22-OH) and 9-cis retinoic acid (9cRA) increased the efflux to apo-AI of cellular sterols derived from AcLDL, but not of those from OxLDL. AcLDL, but not OxLDL, induced ABCA1 protein content and activity in J774. However, OxLDL did not influence J774 ABCA1 upregulation by cpt-cAMP or 22-OH/9cRA. We conclude that sterols released to cells by OxLDL are available neither as substrate nor as modulator of ABCA1.


Assuntos
Transportadores de Cassetes de Ligação de ATP/metabolismo , Lipoproteínas LDL/metabolismo , Macrófagos/metabolismo , Esteróis/metabolismo , Transportador 1 de Cassete de Ligação de ATP , Animais , Apolipoproteína A-I/metabolismo , Linhagem Celular , Colesterol/metabolismo , Humanos , Camundongos , Fosfolipídeos/metabolismo
15.
J Biol Chem ; 278(44): 42976-84, 2003 Oct 31.
Artigo em Inglês | MEDLINE | ID: mdl-12928428

RESUMO

The mechanism of formation of high density lipoprotein (HDL) particles by the action of ATP-binding cassette transporter A1 (ABCA1) is not defined completely. To address this issue, we monitored efflux to apoA-I of phosphatidylcholine (PC), sphingomyelin (SM), and unesterified (free) cholesterol (FC) from J774 macrophages, in which ABCA1 is up-regulated, and investigated the nature of the particles formed. The various apoA-I/lipid particles appearing in the extracellular medium were separated by gel filtration chromatography. The presence of apoA-I in the extracellular medium led to the simultaneous formation of more than one type of poorly lipidated apoA-I-containing particle: there were 9- and 12-nm diameter particles containing approximately 3:1 and 1:1 phospholipid/FC (mol/mol), respectively, which were present together with 6-nm monomeric apoA-I. Removal of the C-terminal alpha-helix (residues 223-243) of apoA-I reduced phospholipid and FC efflux and prevented formation of the 9- and 12-nm HDL particles; the apoA-I variant formed larger particles that eluted in the void volume. FC loading of the J774 cells also led to the formation of larger apoA-I-containing particles that were highly enriched in FC. Besides creating HDL particles, ABCA1 mediated release of larger (20-450-nm diameter) FC-rich particles that were not involved in HDL formation and that are probably membrane vesicles. These particles contained 1:1 PC/SM in contrast to the HDL particles, which contained 2:1 PC/SM. This is consistent with lipid raft and non-raft plasma membrane domains being involved primarily in ABCA1-mediated vesicle release and nascent HDL formation, respectively.


Assuntos
Transportadores de Cassetes de Ligação de ATP/metabolismo , Apolipoproteína A-I/fisiologia , Colesterol/metabolismo , Lipoproteínas HDL/metabolismo , Macrófagos/metabolismo , Fosfolipídeos/metabolismo , Transportador 1 de Cassete de Ligação de ATP , Animais , Apolipoproteína A-I/metabolismo , Membrana Celular/metabolismo , Células Cultivadas , Cromatografia em Gel , AMP Cíclico/metabolismo , Humanos , Cinética , Camundongos , Fosfatidilcolinas/metabolismo , Estrutura Terciária de Proteína , Esfingomielinas/metabolismo , Regulação para Cima
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