Identification of Adverse Plaque Characteristics by Coronary Magnetic Resonance Angiography
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 入组人数
- 2
- 试验地点
- 2
- 主要终点
- Adverse plaque characteristics present on CMRA
研究概览
简要总结
This is a pilot study to determine whether coronary magnetic resonance angiography(CMRA)can identify adverse plaque characteristics (buildup of fat, cholesterol, calcium, and other substances found in the blood) seen on coronary computed tomography angiography(CCTA) and evaluate whether there is a relationship between the adverse plaque characteristics and the presence of coronary artery wall inflammation.
详细描述
This pilot study will examine 20 stable patients who have undergone a clinically-indicated coronary computed tomography angiography (CCTA) for suspected Coronary Artery Disease. They will be invited to undergo a research coronary Magnetic Resonance Imaging scan with contrast(CMRA). Based upon the subject's heart rate, a beta blocker may be administered as its use has been shown to be effective in producing better images as it widens the arteries.
Researchers will use newly developed non-invasive coronary MRA techniques to compare information shown on the research CMRA with the clinical CCTA. While CCTA has been demonstrated to be able to provide data on adverse plaque characteristics (APC's), the ability of CMRA to evaluate these features is not established.
研究设计
- 研究类型
- Interventional
- 分配方式
- Na
- 干预模型
- Single Group
- 主要目的
- Diagnostic
- 盲法
- None
入排标准
- 年龄范围
- 18 Years 至 —（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •Age ≥18 years
- •Ability to comprehend and sign informed consent
- •Presence of a non-calcified or mixed plaque without high-grade stenosis in the left main or a proximal coronary artery segment AND at least one APC present in this plaque by CCTA (defined as LAP with <30 Hounsfield units or PR with ≥10% increase in the maximal vessel diameter within the plaque as compared to a proximal reference segment as previously described10).
排除标准
- •High-grade stenosis (≥50% stenosis of the left main artery or ≥70% stenosis of another proximal coronary segment);
- •Coronary artery stent in the segment with the reference plaque
- •Possible pregnancy
- •Glomerular filtration rate <45 ml/min
- •More than 90 days between CCTA and CMRA study
- •Any significant arrhythmia (e.g. atrial fibrillation, frequent ectopy)
- •Significant asthma
- •History of 2nd or 3rd degree heart block
- •Allergy or known intolerance to beta-blockers
- •Use of phosphodiesterase inhibitor (e.g. Viagra) within the last 48 hours
- •Rapid heart rate (heart rate ≥90 beats/minute)
- •Severe aortic stenosis (Aortic valve area <1.0 cm2 or mean gradient >30 mmHg)
- •Systolic blood pressure <100 mmHg
- •Other contraindication to MRI, including metallic implants (valve replacement, pacemaker, implantable cardiac defibrillator, metallic spine material), intracranial clips, metallic fragments in eyes, and claustrophobia
结局指标
主要结局
Adverse plaque characteristics present on CMRA
时间窗: one day
次要结局
未报告次要终点
研究者
Daniel S. Berman
Principal Investigator
Cedars-Sinai Medical Center