The Interrogation of the Cardiomyopathy of Chronic Kidney Disease With advancEd caRdiac Imaging
试验速览
- 阶段
- 不适用
- 状态
- 终止
- 入组人数
- 28
- 试验地点
- 1
- 主要终点
- Part 1A: Myocardial native T1 in response to changing fluid status
研究概览
简要总结
Patients with kidney failure have a much higher risk of heart disease compared to people of the same age without kidney failure. The reason for this is not fully understood. In this project we will use Cardiac MRI (CMR), which is a very detailed scan of the heart and blood vessels, to try to better understand the cardiovascular changes that occur in kidney failure. We will perform CMR scans in 30 patients before and after dialysis (a treatment for patients with kidney failure) to see whether dialysis changes the heart muscle. The same patients will also undergo another type of heart scan, called a CT scan. This will allow us to compare the pictures from the 2 different types of scan to help us better understand any damage to the heart muscle that is present. Finally, we will test a new way to measure hardening of blood vessels on CMR. These three studies will help us to better understand the heart and blood vessel changes that happen in kidney failure. This research will also be useful for patients without kidney failure. We hope to be able to use it in the future to see which new treatments might be able to reduce the risk of heart disease in patients with kidney failure.
详细描述
Background: Patients with chronic kidney disease (CKD) are at a dramatically increased risk of cardiovascular disease. This risk is greatest in patients on dialysis and is not explained by conventional cardiovascular risk factors. Myocardial fibrosis, so called Cardiomyopathy of CKD (CM-CKD), in conjunction with excessive arterial calcification, forms the pathological basis for this excess risk. Due to limitations of using myocardial biopsy, combined with the inability to use gadolinium-enhanced imaging in patients with advanced CKD, there is an urgent need for reliable non-invasive ways of diagnosing and investigating CM-CKD.
Study participants: Adult patients established on regular hospital-based haemodialysis, with evidence of recurrent fluid overload requiring fluid removal by ultrafiltration on dialysis.
Study design: This is a single centre observational study. We will perform cardiac MRI (CMR), contrast CT and blood tests in 30 patients before haemodialysis, with a repeat CMR and blood tests post-dialysis.
Objectives: To assess:
- If myocardial native T1 mapping on CMR is affected by fluid status and therefore test the validity of T1 mapping as a marker of fibrosis within the dialysis population?
- If contrast-enhanced dynamic-equilibrium CT can refine insights into the myocardium in CM-CKD?
- If novel CMR methods can effectively identify and delineate arterial calcification compared to CT?
研究设计
- 研究类型
- Observational
- 观察模型
- Cohort
- 时间视角
- Prospective
入排标准
- 年龄范围
- 40 Years 至 100 Years（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •Age 40-100 years at time of recruitment.
- •Established on regular day-time, hospital-based haemodialysis for >6 months.
- •History of recurrent fluid overload, defined as a mean of >1.5 litres fluid removal per dialysis session from an average of 3 consecutive sessions.
- •No previous clinical diagnosis of heart failure, or if previous clinical diagnosis of heart failure then must have preserved left ventricular function (ejection fraction >50% or reported as 'normal' or (similar)) on most recent transthoracic echo.
- •Ability to comply with study procedures, including ability to lie flat for up to 1 hour.
- •Ability to give informed consent.
排除标准
- •Standard contra-indications to MRI, including the presence of certain metallic objects in the body (e.g. non-MRI compatible cardiac devices, previous cranial surgery with ferromagnetic clips, metal fragments in eye, etc.) and severe claustrophobia.
- •Known allergy to iodinated radiological contrast.
- •Asthma (unless previous CT with contrast administration within the past 12 months without adverse effect).
- •Pregnancy, lactation or women of child-bearing potential not willing to use highly effective contraception for the duration of the study.
- •Any other reason considered by a study physician to make the subject inappropriate for inclusion.
结局指标
主要结局
Part 1A: Myocardial native T1 in response to changing fluid status
时间窗: 24 hours
Change in myocardial native T1 mapping (MOLLI) on cardiac MRI at visit 2, compared to visit 1, following removal of excess fluid by ultrafiltration.
Part 1C: Vascular calcification on MRI
时间窗: Baseline
Comparison between Cardiac MRI and CT to detect the presence or absence of vascular calcification within the thoracic aorta at the level of the right pulmonary artery (PA).
Part 1B: Measurement of myocardial extracellular volume by CT (ECV-CT)
时间窗: Baseline
Comparison between myocardial extracellular volume on contrast-enhanced CT and myocardial native T1 times measured on cardiac MRI.
次要结局
未报告次要终点