Utilising Lifemap to Investigate Malignant Arrhythmia Therapy (ULTIMATE)
ULTIMATE: Utilising Lifemap to Investigate Malignant Arrhythmia ThErapy
It is universally recognised that current methods for risk stratification of sudden cardiac death (SCD) are limited. A novel SCD risk marker, the Regional Restitution Instability Index (R2I2), measures the degree of heterogeneity in electrical restitution using data obtained from a standard 12 lead ECG acquired during an invasive electrophysiological study.
In an ischaemic cardiomyopathy (ICM) cohort of 66 patients, an R2I2 of ≥1.03 identified subjects with a significantly higher risk of ventricular arrhythmia (VA) or death (43%) compared with those with an R2I2 <1.03 (11%) (P=0.004).
This study will use non-invasive techniques to acquire electrical restitution data: exercise and pharmacological stress, and will incorporate body surface potential mapping to develop a non-invasive and high-resolution form of R2I2. Suitable patients will be recruited into a prospective, observational study.
HYPOTHESES:
PRIMARY:
- R2I2 is predictive of ventricular arrhythmia (VA) / SCD in patients with ICM.
- The exercise stress protocol will create a dynamic range of heart rates that allows ECG quantification of electrical restitution heterogeneity that correlates with invasive R2I2 and is predictive of VA/SCD. The pharmacological stress protocol will create a dynamic range of heart rates that allows ECG based quantification of electrical restitution heterogeneity that correlates with invasive R2I2 and is predictive of VA/SCD.
SECONDARY:
- A high-resolution electrical map acquired using body surface potential mapping will correlate with R2I2 and these data can be included in the R2I2 calculation to improve its prediction of SCD/VA.
- Serial measurement of R2I2 will produce consistent values.
研究概览
研究类型
注册 (预期的)
联系人和位置
学习地点
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-
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Leicester、英国、LE3 9QP
- 招聘中
- NIHR Leicester Cardiovascular Biomedical Research Unit
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接触:
- M. Shoaib Siddiqui, MBBS
- 电话号码:+44 116 258 3643
- 邮箱:mss33@le.ac.uk
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首席研究员:
- G. Andre Ng, MBChB, PhD
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副研究员:
- Will B Nicoloson, MBChB
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副研究员:
- M. Shoaib Siddiqui, MBBS
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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:
- Age >18
- History of ischaemic cardiomyopathy
Exclusion Criteria:
- Unable to give informed consent
- <28 days since cardiac surgery or acute coronary syndrome
学习计划
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 |
|---|
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Ischaemic cardiomyopathy
Patients with ischaemic cardiomyopathy attending for ICD implantation
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研究衡量的是什么?
主要结果指标
结果测量 |
大体时间 |
|---|---|
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Ventricular arrhythmia/Sudden cardiac death
大体时间:18 months
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18 months
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次要结果测量
结果测量 |
大体时间 |
|---|---|
|
Syncope
大体时间:18 months
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18 months
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All cause mortality
大体时间:18 months
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18 months
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合作者和调查者
调查人员
- 首席研究员:G. Andre Ng, MBCHb, PhD、University of Leicester
研究记录日期
研究主要日期
学习开始
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 (估计)
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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