24-hour Blood Pressure Dynamics and Autonomic Adrenergic Regulation in Type 2 Diabetics
Autonomic neuropathy is a common complication of type 2 diabetes mellitus. Symptoms from cardiovascular autonomic neuropathy include, dizziness, orthostatic hypotension and insufficient heart rate and blood pressure (BP) regulation during physical exertion. The degree of cardiovascular autonomic neuropathy is most commonly measured as cardiac autonomic neuropathy based on at least two abnormal cardiac reflex tests, which primarily measures parasympathetic indices of the autonomic nervous system (ANS).
Few measures are available for quantifying the sympathetic/adrenergic branch of the ANS.
Circadian changes in BP is a documented measure of BP variability, regulated centrally by a multitude of centers. A growing number of studies indicate that a diminished BP variability is associated with increased cardiovascular risk and injury. The ANS plays a pivotal role in the execution of these circadian BP changes, mainly through sympathetic adrenergic nerve fibers
Few studies have investigated the applicability of 24-hour indices as predictor for autonomic adrenergic dysfunction. No previous studies have investigated the association between clinical markers of adrenergic function, and 24-hour blood pressure indices in type 2 diabetes.
研究概览
地位
研究类型
注册 (预期的)
联系人和位置
学习地点
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Skejby
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Aarhus、Skejby、丹麦、8200
- Danish Pain Research Center, Aarhus University Hospital
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参与标准
资格标准
适合学习的年龄
接受健康志愿者
有资格学习的性别
取样方法
研究人群
描述
Inclusion Criteria:
- Type 2 diabetes
- Normal 12-lead ECG
Exclusion Criteria:
- Significant cardiovascular, muscular, lung, kidney or psychiatric disease
- Pregnancy
- Malignant disease, HIV, alcoholism or drug abuse
- Parkinson disease
- Ischemic heart disease
- Vital medicine that can affect the autonomic nervous system
学习计划
研究是如何设计的?
设计细节
队列和干预
团体/队列 |
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Patients
Type 2 diabetics
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Healthy controls
Matched healthy controls
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研究衡量的是什么?
主要结果指标
结果测量 |
措施说明 |
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24 hour Blood Pressure
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Day/night blood pressure ratio.
Day time standard deviation and average real time variation
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Autonomic adrenergic measure
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Valsalva maneuver - Phase 2Late, Pressure recovery time, Baroreceptor sensitivity, Phase 4 rise.
Head up tilt test - Blood pressure dip ratio
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合作者和调查者
研究记录日期
研究主要日期
学习开始 (实际的)
初级完成 (预期的)
研究完成 (预期的)
研究注册日期
首次提交
首先提交符合 QC 标准的
首次发布 (实际的)
研究记录更新
最后更新发布 (实际的)
上次提交的符合 QC 标准的更新
最后验证
更多信息
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