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Effects of Hormonal Anabolic Deficiency and Neurovascular Alterations on Mortality in Male Patients With Heart Failure (TestoHF)

2021年4月29日 更新者:Maria Janieire de Nazaré Nunes Alves、University of Sao Paulo General Hospital

Hormonal Anabolic Deficiency Associated With Neurovascular Alterations Predict Poor Prognosis in Male Patients With Heart Failure

Heart failure (HF) has been associated with chronic deleterious effects on skeletal muscle, endocrine system, vasculature and sympathetic nervous system. These alterations have a significant impact on quality of life, leading to a reduction in functional capacity and limited symptoms, which involve dyspnea and fatigue. The investigators tested the hypothesis that hormonal anabolic deficiency associated with neurovascular alterations may worsen the prognosis of patients with heart failure.

研究概览

地位

完全的

条件

干预/治疗

详细说明

One hundred and fifty six patients have been enrolled so far. Methods were as described below:

  • Muscle sympathetic nerve activity (MSNA) was directly recorded from the peroneal nerve using the microneurography technique ;
  • All patients underwent symptom-limited cardiopulmonary exercise test performed on a cycle ergometer, using a ramp protocol with workload increments of 5 or 10 Watts per minute;
  • Body composition measurements were performed using dual-energy X-ray absorptiometry (DXA);
  • Muscle strength was assessed by handgrip dynamometer using the mean value of three attempts;
  • Blood samples were drawn in the morning after 12h overnight fasting. The laboratory tests included B-type natriuretic peptide (BNP; pg/mL) plasma level, serum sodium (mEq/L), serum potassium (mEq/L), creatinine (mg/dL), haemoglobin level (g/dL), high-sensitivity C-reactive protein (CRP; mg/L), lipid profile (triglyceride, total cholesterol, high-density lipoprotein, and low-density lipoprotein; mg/dL), and fasting glucose (mg/dL). Blood sample to assess hormone plasma levels were also drawn at the same time: total testosterone (TT), free testosterone (FT), sex hormone binding globulin (SHBG), dehydroepiandrosterone sulfate (DHEAS), luteinizing hormone (LH), follicle-stimulating hormone (FSH), thyroid stimulating hormone (TSH) and insulin-like growth factor 1 (IGF1).

研究类型

观察性的

注册 (实际的)

169

联系人和位置

本节提供了进行研究的人员的详细联系信息,以及有关进行该研究的地点的信息。

学习地点

    • SP
      • Sao Paulo、SP、巴西、05403-900
        • Instituto do Coração do Hospital da Clínicas da Universidade de Sao Paulo

参与标准

研究人员寻找符合特定描述的人,称为资格标准。这些标准的一些例子是一个人的一般健康状况或先前的治疗。

资格标准

适合学习的年龄

18年 至 65年 (成人、年长者)

接受健康志愿者

不

有资格学习的性别

男性

取样方法

概率样本

研究人群

Patients with heart failure recruited at Clinical Unit of Myocardiopathy at General Hospital of the University of São Paulo Medical School (UNCAR/HC-FMUSP).

描述

Inclusion Criteria:

  • age between 18 and 65 years old;
  • at least1 year of diagnosed HF;
  • left ventricular ejection fraction (LVEF) lower than 40% measured by echocardiography;
  • non-ischaemic and ischaemic aetiologies;
  • compensated HF with optimal medication for at least 3 months prior the study;
  • New York Heart Association (NYHA) class of I to IV.

Exclusion Criteria:

  • patients with autonomic diabetic neuropathy;
  • patients with chronic renal failure with haemodialysis;
  • heart transplantation;
  • presence of pacemaker;
  • patients with muscular dystrophy (i.e. Duchenne muscular dystrophy);
  • patients submitted to any hormonal treatment;
  • history of cancer;
  • ongoing infection;
  • myocardial infarction with percutaneous coronary intervention or revascularization 6 months prior to the study entry.

学习计划

本节提供研究计划的详细信息,包括研究的设计方式和研究的衡量标准。

研究是如何设计的?

设计细节

  • 观测模型:队列
  • 时间观点:预期

队列和干预

团体/队列
干预/治疗
Low testosterone

Patients with HF and testosterone deficiency.

  • Cardiopulmonary exercise test
  • Muscle Sympathetic Nerve Activity
  • Dual-energy X-ray absorptiometry
  • Venous occlusion plethysmography
  • Blood sample collection
  • Dynamometers for Handgrip Strength
Oxygen consumption (VO2) and carbon dioxide output (VCO2) were measured by means of gas exchange on a breath-by-breath basis. The patients were initially monitored for 2 minutes at rest when seated on the ergometer, after that they were instructed to pedal at a pace of 60-70 rpm and the completion of the test occurred when, in spite of verbal encouragement, the patient reached maximal volitional fatigue.
Multiunit post-ganglionic muscle sympathetic nerve recordings were made using a tungsten microelectrode placed in the peroneal nerve near the fibular head. Nerve signals were amplified by a factor of 50,000 to 100,000 and band-pass filtered (700 to 2000 Hz). For recording and analysis, nerve activity was rectified and integrated (time constant 0.1 seconds) to obtain a mean voltage display of sympathetic nerve activity.
Dual-energy X-ray absorptiometry (DXA) scan was used to measure total lean mass, body fat and bone mineral content.
Venous occlusion plethysmography was used to assess non-invasively blood flow.
Blood samples were drawn in the morning after 12h overnight fasting.
Muscle strength was assessed by handgrip dynamometer using the mean value of three attempts.
Normal testosterone

Patients with HF and normal plasma levels of testosterone.

  • Cardiopulmonary exercise test
  • Muscle Sympathetic Nerve Activity
  • Dual-energy X-ray absorptiometry
  • Venous occlusion plethysmography
  • Blood sample collection
  • Dynamometers for Handgrip Strength
Oxygen consumption (VO2) and carbon dioxide output (VCO2) were measured by means of gas exchange on a breath-by-breath basis. The patients were initially monitored for 2 minutes at rest when seated on the ergometer, after that they were instructed to pedal at a pace of 60-70 rpm and the completion of the test occurred when, in spite of verbal encouragement, the patient reached maximal volitional fatigue.
Multiunit post-ganglionic muscle sympathetic nerve recordings were made using a tungsten microelectrode placed in the peroneal nerve near the fibular head. Nerve signals were amplified by a factor of 50,000 to 100,000 and band-pass filtered (700 to 2000 Hz). For recording and analysis, nerve activity was rectified and integrated (time constant 0.1 seconds) to obtain a mean voltage display of sympathetic nerve activity.
Dual-energy X-ray absorptiometry (DXA) scan was used to measure total lean mass, body fat and bone mineral content.
Venous occlusion plethysmography was used to assess non-invasively blood flow.
Blood samples were drawn in the morning after 12h overnight fasting.
Muscle strength was assessed by handgrip dynamometer using the mean value of three attempts.

研究衡量的是什么?

主要结果指标

结果测量
措施说明
大体时间
Impact of testosterone deficiency on mortality
大体时间:2 years
Blood sample was collected in the morning (between 8:00-10:00 a.m.) after 12 hours fasting.
2 years
Impact of muscle sympathetic nerve activity on mortality
大体时间:2 years
Microneurography was used to assess the sympathetic nervous system.
2 years
Impact of neurovascular alterations on mortality
大体时间:2 years
Venous occlusion pletysmography was used to evaluate vasodilation.
2 years

次要结果测量

结果测量
措施说明
大体时间
Impact of testosterone deficiency on body composition
大体时间:2 years
Body composition measurements were performed using dual-energy X-ray absorptiometry.
2 years
Impact of testosterone deficiency on functional capacity
大体时间:2 years
All patients underwent symptom-limited cardiopulmonary exercise test to measure functional capacity.
2 years
Impact of testosterone deficiency on strength
大体时间:2 years
Muscle strength was assessed by handgrip dynamometer using the mean value of three attempts.
2 years

合作者和调查者

在这里您可以找到参与这项研究的人员和组织。

赞助

合作者

调查人员

  • 首席研究员:Maria Janieire de Nazaré Nunes Alves, PhD、InCor Heart Institute

研究记录日期

这些日期跟踪向 ClinicalTrials.gov 提交研究记录和摘要结果的进度。研究记录和报告的结果由国家医学图书馆 (NLM) 审查,以确保它们在发布到公共网站之前符合特定的质量控制标准。

研究主要日期

学习开始 (实际的)

2016年6月30日

初级完成 (实际的)

2020年3月23日

研究完成 (实际的)

2020年12月30日

研究注册日期

首次提交

2018年3月1日

首先提交符合 QC 标准的

2018年3月9日

首次发布 (实际的)

2018年3月13日

研究记录更新

最后更新发布 (实际的)

2021年5月3日

上次提交的符合 QC 标准的更新

2021年4月29日

最后验证

2021年4月1日

更多信息

与本研究相关的术语

其他相关的 MeSH 术语

其他研究编号

  • AnabolicHormonesPrognosis

计划个人参与者数据 (IPD)

计划共享个人参与者数据 (IPD)?

不

药物和器械信息、研究文件

研究美国 FDA 监管的药品

不

研究美国 FDA 监管的设备产品

不

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