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1.
J Fish Biol ; 105(1): 358-371, 2024 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-38802981

RESUMEN

Changes in body shape are linked to swimming performance and become relevant for selective breeding programmes in cultured finfish. We studied how the selection for fast growth could affect phenotypes by investigating the relationship between swimming performance and body shape. We also investigated how swimming might affect plasma metabolite concentrations. Critical swimming speed (UCrit), body traits (e.g., BW, body weight; BL, body length; K, condition factor), and plasma lactate and glucose concentrations were evaluated in two cohorts of Australasian snapper (Chrysophrys auratus): one derived from wild broodstock (F1), and the other selected for fast growth (F4). UCrit tests (n = 8) were applied in groups of 10 snapper of similar BW (71.7 g) and BL (14.6 cm). The absolute or relative UCrit values of both cohorts were similar (0.702 m⋅s-1 and 4.795 BL⋅s-1, respectively), despite the F4 cohort displaying a higher K. A positive correlation between K and absolute UCrit (Pearson's r = 0.414) was detected in the F4 cohort, but not in the F1 cohort, which may be linked to differences in body shape. A negative correlation between relative UCrit and body size (Pearson's r between -0.682 and -0.501), but no correlation between absolute UCrit and body size, was displayed in both cohorts. Plasma lactate and glucose concentrations were higher in the F4 cohort at UCrit. Whether a longer selective breeding programme could result in more changes in body shape, potentially affecting swimming performance, should be explored, along with the potential outcomes of the differences in metabolic traits detected.


Asunto(s)
Glucemia , Ácido Láctico , Natación , Animales , Natación/fisiología , Ácido Láctico/sangre , Glucemia/análisis , Perciformes/crecimiento & desarrollo , Perciformes/fisiología , Perciformes/anatomía & histología , Fenotipo , Peso Corporal , Tamaño Corporal , Selección Genética , Masculino , Femenino
2.
F S Rep ; 4(2): 130-142, 2023 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-37398610

RESUMEN

Objective: To describe the initiation, integration, and costs of reduced-cost infertility services within the maternal health department of a public hospital in a low-income country. Design: Retrospective review of the clinical and laboratory components of patients undergoing in vitro fertilization (IVF) treatment in Rwanda from 2018 to 2020. Setting: Academic tertiary referral hospital in Rwanda. Patients: Patients seeking infertility services beyond the primary gynecological options. Interventions: The national government furnished facilities and personnel, and the Rwanda Infertility Initiative, an international nongovernmental organization, provided training, equipment, and materials. The incidence of retrieval, fertilization, embryo cleavage, transfer, and conception (observed until ultrasound verification of intrauterine pregnancy with fetal heartbeat) were analyzed. Cost calculations used the government-issued tariff specifying insurers' payments and patients' copayments with projected delivery rates using early literature. Main Outcome Measures: Assessment of functional clinical and laboratory infertility services and costs. Results: A total of 207 IVF cycles were initiated, 60 of which led to transfer of ≥1 high-grade embryo and 5 to ongoing pregnancies. The projected average cost per cycle was 1,521 USD. Using optimistic and conservative assumptions, the estimated costs per delivery for women <35 years were 4,540 and 5,156 USD, respectively. Conclusions: Reduced-cost infertility services were initiated and integrated within a maternal health department of a public hospital in a low-income country. This integration required commitment, collaboration, leadership, and a universal health financing system. Low-income countries, such as Rwanda, might consider infertility treatment and IVF for younger patients as part of an equitable and affordable health care benefit.

3.
Biol Lett ; 18(3): 20210259, 2022 03.
Artículo en Inglés | MEDLINE | ID: mdl-35259943

RESUMEN

Sharks represent the earliest group of jawed vertebrates and as such, they may provide original insight for understanding the evolution of sleep in more derived animals. Unfortunately, beyond a single behavioural investigation, very little is known about sleep in these ancient predators. As such, recordings of physiological indicators of sleep in sharks have never been reported. Reduced energy expenditure arising from sustained restfulness and lowered metabolic rate during sleep have given rise to the hypothesis that sleep plays an important role for energy conservation. To determine whether this idea applies also to sharks, we compared metabolic rates of draughtsboard sharks (Cephaloscyllium isabellum) during periods ostensibly thought to be sleep, along with restful and actively swimming sharks across a 24 h period. We also investigated behaviours that often characterize sleep in other animals, including eye closure and postural recumbency, to establish relationships between physiology and behaviour. Overall, lower metabolic rate and a flat body posture reflect sleep in draughtsboard sharks, whereas eye closure is a poorer indication of sleep. Our results support the idea for the conservation of energy as a function of sleep in these basal vertebrates.


Asunto(s)
Tiburones , Animales , Ojo , Tiburones/fisiología , Sueño/fisiología , Natación
4.
Int J Tuberc Lung Dis ; 23(8): 881-890, 2019 08 01.
Artículo en Inglés | MEDLINE | ID: mdl-31533877

RESUMEN

The World Health Organization (WHO) defines palliative care as the prevention and relief of the physical, psychological, social and spiritual suffering of adults and children with life-threatening illnesses and psycho-social support for their families. Palliative care and symptom relief (PCSR) also addresses suffering in nonlife-threatening situations such as after cure. PCSR should never be considered a substitute for tuberculosis (TB) prevention and treatment, but should be accessible by everyone in need. PCSR can reduce suffering and improve quality of life of patients with end-stage chronic illnesses while reducing costs for health care systems and providing financial risk protection for patients' families. It also may help enable patients to adhere to long and noxious treatments and thereby reduce mortality and help protect public health. Basic PCSR can be taught easily to TB specialists as well as primary care clinicians and delivered in hospitals, clinics or patients' homes combined with infection control. For these reasons, integration of PCSR into multidrug-resistant (MDR) and extensively drug-resistant TB (XDR-TB) treatment programs is medically and morally imperative. We propose an essential package of PCSR for people with M/XDR-TB that includes a set of safe, effective and inexpensive medicines and equipment, social supports for patients and caregivers living in extreme poverty, and necessary human resources. The package aligns with WHO guidance on programmatic management of drug-resistant (DR) TB and should be universally accessible by people affected by M/XDR-TB. We also describe the ethical practice of PCSR for people with M/XDR-TB and identify needed areas of research in PCSR for people with M/XDR-TB.


Asunto(s)
Antituberculosos/administración & dosificación , Tuberculosis Extensivamente Resistente a Drogas/tratamiento farmacológico , Cuidados Paliativos/métodos , Tuberculosis Resistente a Múltiples Medicamentos/tratamiento farmacológico , Tuberculosis Extensivamente Resistente a Drogas/fisiopatología , Humanos , Cumplimiento de la Medicación , Calidad de Vida , Apoyo Social , Tuberculosis Resistente a Múltiples Medicamentos/fisiopatología
5.
PLoS One ; 14(8): e0221149, 2019.
Artículo en Inglés | MEDLINE | ID: mdl-31415660

RESUMEN

DESIGN: This study surveyed patients with stored frozen embryos and developed and tested an intervention through a randomized trial to support subjects to consider embryo disposition options (EDOs), especially donation for family building. METHODS: Based on a review of literature on EDOs, the authors developed and mailed a 2-page anonymous survey to 1,053 patients in Massachusetts (USA) to elicit their feelings about their stored embryos. Target patients had embryos cryopreserved for ≥1 year and had not indicated an EDO. Survey respondents were next randomized between usual care (control arm) or an offer of complimentary counseling and educational support regarding EDOs. These counseling sessions were conducted by a licensed mental health professional specializing in infertility treatment. RESULTS: Despite telephone reminders, only 21.3% of patients responded, likely reflecting most patients' reluctance to address EDOs. Respondents endorsed an average of 2 of the 5 EDOs, with the following percentages supporting each option: store for future attempts (82%), continue storage (79%), donate to research (29%), discard (14%), and donate for family building (13%). When asked their opinions towards embryo donation to another couple, 78% of patients agreed that donation is a way to help another couple, 48% would consider embryo donation to another family if they had a better understanding of the process, and 38% would be willing to consider donation if they were not going to use the embryos themselves, but 73% expressed discomfort with donation. In the randomized trial, 7.8% of intervention subjects (n = 8) obtained counseling sessions compared to 0.0% (none) of usual care subjects (p = 0.0069). Counseling participants valued not only discussing EDOs, but also assistance in expressing their feelings and differences with their partners. CONCLUSION: Improvement in counseling rates over the control arm suggests that free professional counseling is a small, but likely effective, step towards deciding on an EDO. ClinicalTrials.gov Identifier: NCT01883934 (Frozen embryo donation study).


Asunto(s)
Consejo , Criopreservación , Destinación del Embrión , Fertilización In Vitro , Adulto , Femenino , Humanos , Massachusetts
6.
Reprod Biomed Online ; 27(4): 407-13, 2013 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-23953586

RESUMEN

The incidence of ectopic pregnancy after IVF is increased approximately 2.5-5-fold compared with natural conceptions; however, the aetiology for this increased risk remains unclear. One proposed practice change to decrease the incidence of ectopic pregnancy is blastocyst embryo transfer on day 5 rather than cleavage-stage embryo transfer on day 3. A retrospective cohort study was conducted to compare the risk of ectopic pregnancy following fresh day-5 embryo transfer with day-3 embryo transfer among women who underwent IVF and achieved pregnancy from 1998 to 2011. There were 13,654 eligible pregnancies; 277 were ectopic. The incidence of ectopic pregnancy was 2.1% among day-3 pregnancies and 1.6% among day-5 pregnancies. The adjusted risk ratio for ectopic pregnancy from day-5 compared with day-3 transfer was 0.71 (95% confidence interval 0.46-1.10). Although this analysis included 13,654 cycles, with a two-sided significance level of 0.05, it had only 21.9% power to detect a difference between the low incidence of ectopic pregnancy among both day-3 and day-5 transfers. In conclusion, this study was not able to demonstrate a difference in the risk of ectopic pregnancy among day-3 compared with day-5 transfers.


Asunto(s)
Transferencia de Embrión/métodos , Embarazo Ectópico/epidemiología , Implantación del Embrión , Femenino , Fertilización In Vitro , Humanos , Incidencia , Oportunidad Relativa , Embarazo , Estudios Retrospectivos , Medición de Riesgo , Factores de Tiempo
7.
AIDS Care ; 22(12): 1522-9, 2010 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-20824549

RESUMEN

The HIV-infected population in the USA is expanding as patients survive longer and new infections are identified. In many areas, particularly rural/medically underserved regions, there is a growing shortage of providers with sufficient HIV expertise. HIV services incorporated into community-based (CB), primary care settings may therefore improve the distribution and delivery of HIV treatment. Our objective was to describe/compare patients and treatment outcomes in two settings: a community-located, primary care-based HIV program, and a hospital-based (HB) specialty center. CB providers had on-site access to generalist HIV experts. The hospital center was staffed primarily by infectious disease physicians. This was a retrospective cohort study of 854 HIV-positive adults initiating care between 1/2005 and 12/2007 within an academic medical center network in the Bronx, NY. Treatment outcomes were virologic and immunologic response at 16-32 and 48 weeks, respectively, after combination antiretroviral therapy (cART) initiation. We found that HB subjects presented with a higher prevalence of AIDS (59% vs. 46%, p<0.01) and lower initial CD4 (385 vs. 437, p<0.05) than CB subjects. Among 178 community vs. 237 hospital subjects starting cART, 66% vs. 62% achieved virologic suppression (95% confidence interval (CI) difference -0.14-0.06) and 49% vs. 59% achieved immunologic success, defined as a 100 cell/mm³ increase in CD4 (95% CI difference 0.00-0.19). The multivariate-adjusted likelihoods of achieving viral suppression [OR=1.24 (95% CI 0.69-2.33)] and immunologic success [OR=0.76 (95% CI 0.47-1.21)] were not statistically significant for community vs. hospital subjects. Because this was an observational study, propensity scores were used to address potential selection bias when subjects presented to a particular setting. In conclusion, HIV-infected patients initiate care at CB clinics earlier and with less advanced HIV disease. Treatment outcomes are comparable to those at a HB specialty center, suggesting that HIV care can be delivered effectively in community settings.


Asunto(s)
Fármacos Anti-VIH/uso terapéutico , Terapia Antirretroviral Altamente Activa/métodos , Centros Comunitarios de Salud/normas , Infecciones por VIH/tratamiento farmacológico , Servicio Ambulatorio en Hospital/normas , Adulto , Centros Comunitarios de Salud/organización & administración , Femenino , Humanos , Masculino , Persona de Mediana Edad , Análisis Multivariante , New York , Servicio Ambulatorio en Hospital/organización & administración , Aceptación de la Atención de Salud/psicología , Estudios Retrospectivos , Resultado del Tratamiento
8.
Reprod Biomed Online ; 21(3): 418-21, 2010 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-20638908

RESUMEN

This report describes an unusual case of ovarian torsion during an IVF cycle prior to vaginal oocyte retrieval and the subsequent embryo development. A 27-year-old, whose husband carries a balanced translocation, presented on stimulation day 11 (day after human chorionic gonadotrophin administration) with signs of right ovarian torsion. Transvaginal ultrasound identified decreased right ovarian venous flow but preservation of right ovarian arterial flow. She underwent emergency laparoscopic right ovarian detorsion followed by vaginal oocyte retrieval on postoperative day 1. Ten oocytes were retrieved from the right detorted ovary, 4/10 (40%) were fertilized and 3/4 (75%) became blastocysts. Fifteen oocytes were retrieved from the left ovary, 14/15 (93%) were fertilized and 9/14 (64%) became blastocysts. All 18 embryos biopsied for preimplantation genetic diagnosis carried unbalanced translocations and none were transferred. The markedly reduced fertilization rate of the oocytes from the previously torted ovary is similar to the rate described in a prior report and likely related to decreased but maintained ovarian arterial flow. This report is unique because not only was the patient's ovarian torsion surgically corrected prior to oocyte retrieval but also the embryos originating from the previously torted ovary had excellent development with 75% progressing to the blastocyst stage.


Asunto(s)
Fertilización In Vitro/efectos adversos , Enfermedades del Ovario/etiología , Anomalía Torsional/etiología , Adulto , Desarrollo Embrionario , Femenino , Humanos , Masculino , Meiosis , Recuperación del Oocito , Enfermedades del Ovario/diagnóstico por imagen , Ovario/irrigación sanguínea , Ovario/diagnóstico por imagen , Embarazo , Diagnóstico Preimplantación , Factores de Tiempo , Anomalía Torsional/diagnóstico por imagen , Translocación Genética , Ultrasonografía
9.
AIDS Care ; 21(12): 1528-36, 2009 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-20024732

RESUMEN

Even with advances in the medical management of HIV/AIDS, it remains an important cause of morbidity and mortality. Network members are a source of support and may be designated as the patient's surrogate therapeutic decision maker. However, little is known about the role of caregivers regarding highly active antiretroviral therapy (HAART) and adherence to medication, especially among low income and medically underserved HIV-infected individuals. The objective of this analysis was to explore patients and their caregivers' understanding, insight, and perceptions of HAART. This was a qualitative study conducted in an urban teaching hospital in the Bronx, NY, consisting of 144 adults with advanced HIV/AIDS and their informal/familial caregivers. Patients and caregivers completed in-depth interviews and brief questionnaires. The data were analyzed using standard qualitative techniques. Themes related to HAART efficacy, side effects, and adherence were identified in the discussions with both patients and their care providers. Looking for consistencies and discordant reports of patients-caregivers dyadic experience with HAART and their association with healthcare sentiment, it was found that the accounts of both members of the dyad were more likely to reflect positive feelings about the patient's healthcare experience when they shared perceptions about the treatment, and were more likely to have a negative viewpoint when the dyad was discordant about treatment. These findings support the importance for HIV healthcare providers to include both patients and their caregivers in discussions about HAART, in order to improve their understanding of and satisfaction with the medication, and, to ultimately contribute to patients' adherence. The study also suggests that healthcare teams may enhance dialog with patients and caregivers to create therapeutic decisions to accommodate the priorities and values of the patient and their family. Clinical, educational, and evaluating tools need to be further developed and evaluation to facilitate this process.


Asunto(s)
Terapia Antirretroviral Altamente Activa/psicología , Actitud Frente a la Salud , Cuidadores/psicología , Infecciones por VIH/psicología , Adulto , Anciano , Terapia Antirretroviral Altamente Activa/efectos adversos , Salud de la Familia , Femenino , Infecciones por VIH/tratamiento farmacológico , Humanos , Masculino , Cumplimiento de la Medicación , Persona de Mediana Edad , Salud Urbana
10.
Am J Manag Care ; 14(9): 598-604, 2008 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-18778175

RESUMEN

OBJECTIVE: To evaluate whether lifetime future net tax revenues from an in vitro fertilization (IVF)-conceived child are substantial enough to warrant public subsidy relative to the mean IVF treatment costs required to obtain 1 live birth. STUDY DESIGN: Mathematical generational accounting model. METHODS: The model estimates direct financial interactions between the IVF-conceived child and the government during the child's projected lifetime. In the model, we accrue IVF costs required to conceive the child to the government, and then we estimate future net tax revenue to the federal and state governments from this individual, offset by direct financial transfers from the government (eg, child allowances, education, Medicare, and Social Security). We discount lifetime costs and gross tax payments at Treasury Department rates to establish the present value of investing in IVF. We applied US Congressional Budget Office projected changes in tax rates over the course of the model. RESULTS: An IVF-conceived child, average in every respect (eg, future earnings, healthcare consumption, and life expectancy), represents a net positive return to the government. Based on an average employed individual born in 2005, the projected net lifetime tax contribution is US $606,200. Taking into consideration IVF costs and all direct financial interactions, the net present value is US $155,870. CONCLUSIONS: Lifetime net taxes paid from a child relative to the child's initial IVF investment represent a 700% net return to the government in discounted US dollars from fully employed individuals. This suggests that removing barriers to IVF would have positive tax benefits for the government, notwithstanding its beneficial effect on overall economic growth.


Asunto(s)
Fertilización In Vitro/economía , Financiación Gubernamental/estadística & datos numéricos , Costos de la Atención en Salud/estadística & datos numéricos , Política de Salud/economía , Modelos Econométricos , Impuestos/estadística & datos numéricos , Evaluación de la Tecnología Biomédica/economía , Valor de la Vida/economía , Contabilidad , Análisis Actuarial , Adolescente , Adulto , Niño , Preescolar , Empleo/tendencias , Gobierno Federal , Humanos , Esperanza de Vida , Impuestos/tendencias , Evaluación de la Tecnología Biomédica/estadística & datos numéricos , Estados Unidos
11.
Echocardiography ; 24(1): 40-6, 2007 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-17214621

RESUMEN

BACKGROUND: Echocardiographic indices of dyssynchrony are increasingly used to select candidates for cardiac resynchronization therapy. For widespread screening of heart failure patients, such variables need to be comparable when evaluated by different operators using different equipment. OBJECTIVE AND METHODS: To evaluate the reproducibility and obtainability of echocardiographic indices of mechanical dyssynchrony, we studied 40 subjects stratified according to QRS morphology and systolic function. Two echocardiograms were performed on each patient by different sonographers on different machines and each study was analyzed by two observers. RESULTS: All blood-pool and tissue Doppler indices of dyssynchrony were obtainable in over 97% of cases. Blood-pool Doppler measures were the most reproducible indices of intraventricular dyssynchrony (aortic ejection delay) and interventricular dyssynchrony (aortopulmonary difference in ejection delay). For annular tissue Doppler delays, the time to peak velocity was consistently more reproducible than the time to velocity onset. CONCLUSION: Differences in the reliability of echocardiographic indices may affect their suitability as screening tests for dyssynchrony.


Asunto(s)
Arritmias Cardíacas/diagnóstico por imagen , Ecocardiografía Doppler de Pulso , Arritmias Cardíacas/fisiopatología , Ecocardiografía/normas , Humanos , Reproducibilidad de los Resultados , Índice de Severidad de la Enfermedad
12.
Heart ; 93(6): 732-8, 2007 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-17090563

RESUMEN

OBJECTIVE: To determine whether longitudinal left ventricular systolic function measured by Doppler tissue imaging (DTI) after exercise can identify early left ventricular dysfunction in asymptomatic patients with moderate-severe aortic stenosis. DESIGN: Case-control study. SETTING: Outpatient cardiology departments. PATIENTS: 20 patients with aortic stenosis, with or without equivocal symptoms, a peak aortic valve velocity > or =3 m/s, and left ventricular ejection fraction >50% and 15 aged-matched normal controls. INTERVENTIONS: Echocardiogram performed at rest and immediately after treadmill exercise. MAIN OUTCOME MEASURES: The peak systolic velocity of the lateral mitral annulus (S') by DTI at rest and immediately after exercise, exercise capacity, exercise systolic blood pressure and the plasma level of B-type natriuretic peptide (BNP). RESULTS: For patients with aortic stenosis, mean (SD) aortic valve area was 0.95 (0.3) cm(2). At rest, S' was similar for patients with aortic stenosis and controls, respectively (8.5 (1.5) vs 9.1 (1.8) cm/s, p = 0.15). However, after exercise, S' (12.2 (3.2) vs 17 (2.8) cm/s, p<0.001) and the increase in S' between rest and exercise (4 (3) vs 7.9 (1.5) cm/s, p<0.001) were lower in patients with aortic stenosis. In patients with aortic stenosis, a smaller increase in S' after exercise was associated with lower exercise capacity (r = 0.5, p = 0.02), a smaller increase in exercise systolic blood pressure (r = 0.6, p = 0.005) and higher plasma level of BNP (r = 0.66, p = 0.002). CONCLUSION: In asymptomatic patients with moderate-severe aortic stenosis a lower than normal increase in peak systolic mitral annular velocity after treadmill exercise is a marker of early left ventricular systolic dysfunction.


Asunto(s)
Estenosis de la Válvula Aórtica/fisiopatología , Ejercicio Físico/fisiología , Disfunción Ventricular Izquierda , Anciano , Estenosis de la Válvula Aórtica/sangre , Estenosis de la Válvula Aórtica/diagnóstico por imagen , Presión Sanguínea , Estudios de Casos y Controles , Ecocardiografía Doppler , Tolerancia al Ejercicio , Femenino , Humanos , Masculino , Válvula Mitral/diagnóstico por imagen , Válvula Mitral/fisiología , Análisis Multivariante , Péptido Natriurético Encefálico/sangre , Volumen Sistólico , Disfunción Ventricular Izquierda/diagnóstico por imagen
13.
Heart Lung Circ ; 14(2): 98-103, 2005 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-16352263

RESUMEN

BACKGROUND: Following myocardial infarction, progressive deterioration of left ventricular function often follows, leading eventually to overt heart failure. In the myocardium, there is increased expression of insulin-like growth factor I (IGF-I) mRNA, protein and receptor levels, particularly in the peri-infarct zone, suggesting that IGF-I has a role to play in post-infarct cardiac structure and function. In this study, we examine the effects of exogenous IGF-I on cardiac function. METHODS: Intrapericardial IGF-I (15 microg/kg/d, n=3) or vehicle (sterile saline, n=3) was administered to sheep in chronic heart failure and the results of intrapericardial delivery compared with those of subcutaneous delivery. Left ventricular ejection fraction (EF) was measured to assess cardiac performance. Concentrations of plasma IGF-I were quantified by radioimmunoassay. RESULTS: Intrapericardial delivery of IGF-I resulted in a rapid and sustained increase (P<0.001) in EF, which remained elevated 14 days after cessation of treatment. Subcutaneous IGF-I treatment did not affect EF. Both subcutaneous and intrapericardial IGF-I administration increased concentrations of plasma IGF-I, although concentrations declined prior to the cessation of treatment. CONCLUSIONS: We conclude that the higher concentration of IGF-I in the myocardium, which results from intrapericardial delivery significantly increases EF in chronic heart failure but that subcutaneous delivery of IGF-I does not.


Asunto(s)
Insuficiencia Cardíaca/tratamiento farmacológico , Factor I del Crecimiento Similar a la Insulina/administración & dosificación , Función Ventricular Izquierda/efectos de los fármacos , Administración Cutánea , Animales , Cateterismo Cardíaco , Modelos Animales de Enfermedad , Femenino , Miocardio/metabolismo , Pericardio , Distribución Aleatoria , Ovinos , Volumen Sistólico/efectos de los fármacos
15.
Am J Cardiol ; 94(10): 1270-5, 2004 Nov 15.
Artículo en Inglés | MEDLINE | ID: mdl-15541243

RESUMEN

After ST-elevation myocardial infarction, the association between left ventricular sphericity (measured by biplane ventriculography) and survival rate at a median of 6.5 years was determined in 825 patients. The highest tertile of sphericity (vs the lowest and middle tertiles) was associated with a decreased 10-year survival rate in patients who had anterior myocardial infarction (p = 0.002), inferior myocardial infarction (p = 0.011), Thrombolysis In Myocardial Infarction (TIMI) grade 3 flow (p = 0.005), or TIMI grade 0 to 2 flow (p = 0.001) in the infarct artery. The independent multivariate predictors of a 10-year survival rate were ejection fraction (p = 0.002), treadmill exercise duration (p = 0.004), biplane left ventricular sphericity index (p = 0.032), age (p = 0.043), and end-systolic volume index (p = 0.047), but not TIMI flow grade.


Asunto(s)
Infarto del Miocardio/mortalidad , Remodelación Ventricular , Cineangiografía , Prueba de Esfuerzo , Femenino , Ventrículos Cardíacos/patología , Humanos , Masculino , Persona de Mediana Edad , Infarto del Miocardio/patología , Infarto del Miocardio/fisiopatología , Ventriculografía con Radionúclidos , Ensayos Clínicos Controlados Aleatorios como Asunto , Volumen Sistólico , Tasa de Supervivencia , Función Ventricular Izquierda
16.
Int J Cardiovasc Imaging ; 19(3): 189-97, 2003 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-12834155

RESUMEN

BACKGROUND: Measurement of tricuspid annulus motion (TAM) is an easy way to estimate right ventricular ejection fraction (RVEF). However the accuracy of two-dimensional (2-D) methods for analyzing the three-dimensional (3-D) structure of the tricuspid annulus has not been evaluated. OBJECTIVE: This study evaluated the accuracy with which 2-D measurements of TAM reflect RVEF using 3-D reconstructions of the heart at end diastole (ED) and end systole (ES). METHODS: 2-D echocardiographic studies were performed on 12 subjects and used to reconstruct the RV and tricuspid annulus in 3-D at ED and ES. Measurements of TAM from medial and lateral positions on the annulus were selected from the standard echocardiographic apical four-chamber view. The minimum and maximum possible TAM values, RV volumes, and movement of the apex of the heart along the trajectory of TAM were calculated from the 3-D reconstructions. RESULTS: TAM correlated highly with RVEF (r > or = 0.90). Values found by 2-D and 3-D techniques were not significantly different. Correcting TAM for apex motion did not improve correlation. Summation of medial and lateral TAM data increased correlation values slightly relative to lateral TAM alone. Regional aberrant contractility degraded the predictive value of TAM. CONCLUSION: Estimation of RVEF from 2-D echo measurement of TAM is accurate, especially when medial and lateral TAM are summed, except in patients with severe apical RV dysfunction.


Asunto(s)
Ecocardiografía Doppler , Ecocardiografía Tridimensional , Válvula Tricúspide/diagnóstico por imagen , Válvula Tricúspide/fisiología , Función Ventricular Derecha/fisiología , Adulto , Anciano , Cardiomiopatía Dilatada/diagnóstico , Cardiomiopatía Dilatada/fisiopatología , Femenino , Ventrículos Cardíacos/diagnóstico por imagen , Humanos , Masculino , Persona de Mediana Edad , Insuficiencia de la Válvula Mitral/diagnóstico , Insuficiencia de la Válvula Mitral/fisiopatología , Contracción Miocárdica/fisiología , Isquemia Miocárdica/diagnóstico , Isquemia Miocárdica/fisiopatología , Valor Predictivo de las Pruebas , Estadística como Asunto , Volumen Sistólico/fisiología , Disfunción Ventricular Derecha/diagnóstico , Disfunción Ventricular Derecha/fisiopatología , Función Ventricular , Washingtón
17.
Fertil Steril ; 79(4): 881-5, 2003 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-12749424

RESUMEN

OBJECTIVE: To confirm that hCG levels in follicular fluid and serum would be comparable between i.m. and s.c. administration of purified hCG. DESIGN: In a prospective study, serum and follicular fluid levels of hCG after an i.m. or s.c. injection of 10,000 IU of hCG were evaluated 36 hours after injection, that is, at the time of oocyte retrieval. SETTING: This study was carried out in a university-affiliated IVF program. PATIENT(S): Forty women undergoing oocyte retrieval were entered into the study at the time of egg retrieval, that is, 36 hours after hCG administration. INTERVENTION(S): S.c. or i.m. injection of hCG. MAIN OUTCOME MEASURE(S): Serum and follicular fluid concentrations of hCG were evaluated 36 hours after injection at the time of oocyte retrieval. RESULT(S): There was a significantly higher serum hCG level in the s.c. group (348.6 +/- 98 IU/L) vs. the i.m. group (259.0 +/- 115 IU/L) and a significantly higher follicular fluid hCG level in the s.c. vs. the i.m. group (233.5 +/- 85 vs. 143.4 +/- 134 IU/L). CONCLUSION(S): After purified hCG administration via the s.c. route, both serum and follicular fluid levels are greater compared with the i.m. route.


Asunto(s)
Gonadotropina Coriónica/administración & dosificación , Fertilización In Vitro/métodos , Inducción de la Ovulación/métodos , Adulto , Gonadotropina Coriónica/sangre , Gonadotropina Coriónica/metabolismo , Femenino , Hormona Folículo Estimulante/metabolismo , Líquido Folicular/metabolismo , Humanos , Inyecciones Intramusculares , Inyecciones Subcutáneas , Folículo Ovárico/metabolismo , Inducción de la Ovulación/normas , Embarazo , Estudios Prospectivos
18.
Int J Cardiovasc Imaging ; 19(1): 9-17, 2003 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-12602477

RESUMEN

BACKGROUND: Quantitative analysis from three-dimensional (3D) echocardiography requires accurate reconstruction of left ventricular (LV) surfaces. This currently requires time-consuming manual image tracing. We describe and validate an alternative rapid method of generating LV surfaces. METHODS: A 3D-image set is acquired using transthoracic scanning. Images from five standard echo views are displayed and border points selected where anatomic landmarks are well defined. A LV surface is reconstructed as a convex weighted sum of LVs from a catalog of 80 LVs. The intersections of the surface with the five views are presented on these images. The routine may be rerun until the LV surface matches the images. One LV surface is generated in 3 min +/- 27 s. In 41 studies (19 normal, 15 previous infarction, seven cardiomyopathy) the volumes of the catalog-fit endocardial and epicardial surfaces were compared with volumes from surfaces reconstructed from full manual tracing. RESULTS: Over a wide range of LV volumes and ejection fraction (EF), the catalog-fit results correlated closely to those from manual tracing: end-diastolic volume (194 +/- 99 vs. 204 +/- 110 ml, y = 0.93x, R2 = 0.99, SEE = 19 ml, p < 0.001), end-systolic volume (122 +/- 95 vs. 131 +/- 106 ml, y = 0.92x, R2 = 0.99, SEE = 13 ml, p < 0.001), EF (42 +/- 16 vs. 42 +/- 15%, y = x, R2 = 0.99, SEE = 4%, p < 0.001) and mass (220 +/- 88 vs. 204 +/- 86 g, y = 1.1x, R2 = 0.99, SEE = 24 g, p < 0.001). The endocardial catalog surface was generated from an average of 20 points and three computational runs for both end-diastole and end-systole. CONCLUSIONS: The catalog method of LV reconstruction from 3D-echo provides accurate measurement of volume, EF and mass. The speed of the method is a major advantage.


Asunto(s)
Ecocardiografía Tridimensional , Ventrículos Cardíacos/diagnóstico por imagen , Procesamiento de Imagen Asistido por Computador/métodos , Cardiopatías/diagnóstico por imagen , Ventrículos Cardíacos/anatomía & histología , Humanos , Función Ventricular Izquierda/fisiología
20.
J Urban Health ; 77(2): 187-203, 2000 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-10856000

RESUMEN

OBJECTIVE: To describe the characteristics and outcomes of the first 3 years of admissions to a dedicated skilled nursing facility for people with acquired immunodeficiency syndrome (AIDS). METHODS: Systematic chart review of consecutive admissions to a 30-bed, AIDS-designated long-term care facility in New Haven, Connecticut, from October 1995 through December 1998. RESULTS: The facility has remained filled to 90% or more of its bed capacity since opening. Of 180 patients (representing 222 admissions), 69% were male; mean age was 41 years; 57% were injection drug users; 71% were admitted directly from a hospital. Leading reasons for admission were (1) the need for 24-hour nursing/medical supervision, (2) completion of acute medical treatment, and (3) terminal care. On admission, the median Karnofsky score was 40, and median CD4+ cell count was 24/mm3; 48% were diagnosed with serious neurologic disease, 44% with psychiatric illness; patients were receiving a median of 11 medications on admission. Of 202 completed admissions, 44% of patients died, 48% were discharged to the community, 8% were discharged to a hospital. Median length of stay was 59 days (range 1 to 1,353). Early (< or = 6 months) mortality was predicted by lower admission CD4+ count, impairments in activities of daily living, and the absence of a psychiatric history; long-term stay (> 6 months) was predicted by total number of admission medications, neurologic disease, and dementia. Comparison of admissions from 1995 to 1996 to those in 1997 to 1998 indicated significantly decreased mortality rates and increased prevalence of psychiatric illness between the two periods (P < .01). CONCLUSIONS: A dedicated skilled nursing facility for people with AIDS can fill an important service need for patients with advanced disease, acute convalescence, long-term care, and terminal care. The need for long-term care may continue to grow for patients who do not respond fully to current antiretroviral therapies and/or have significant neuropsychiatric comorbidities. This level of care may be increasingly important not only in reducing lengths of stay in the hospital, but also as a bridge to community-based residential options in the emerging chronic disease phase of the AIDS epidemic.


Asunto(s)
Síndrome de Inmunodeficiencia Adquirida/enfermería , Instituciones de Cuidados Especializados de Enfermería/estadística & datos numéricos , Síndrome de Inmunodeficiencia Adquirida/complicaciones , Síndrome de Inmunodeficiencia Adquirida/tratamiento farmacológico , Síndrome de Inmunodeficiencia Adquirida/mortalidad , Adulto , Enfermedad Crónica/enfermería , Connecticut , Femenino , Humanos , Cuidados a Largo Plazo/organización & administración , Cuidados a Largo Plazo/estadística & datos numéricos , Masculino , Medicaid , Organizaciones sin Fines de Lucro , Evaluación de Resultado en la Atención de Salud , Cuidados Paliativos , Instituciones de Cuidados Especializados de Enfermería/organización & administración , Estados Unidos
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