Assessing the Impact of Diastolic Dysfunction on the Presence of Symptoms in Patients with Primary Mitral Regurgitation.
试验速览
- 阶段
- 不适用
- 状态
- 招募中
- 入组人数
- 40
- 试验地点
- 1
- 主要终点
- Diastolic Dysfunction Symptoms/exercise capacity
研究概览
简要总结
The current American College of Cardiology/American Heart Association (ACC/AHA) guidelines recommend surgery in patient with mitral regurgitation (MR) based on 1) the severity of MR and 2) the presence or absence of symptoms. Studies have shown that Cardiovascular Magnetic Resonance (CMR) is an accurate method to quantify the severity of MR. However, studies have also shown that symptoms are not necessarily related to the presence of symptoms. Thus, there appears to be a disconnect between the severity of MR and symptoms. Recent analysis of our data has shown that females and older patients with smaller ventricles, lower stroke volumes, and lower regurgitant volume relative to regurgitant fraction tend to be symptomatic. These findings suggest that decreased left ventricular compliance, i.e. diastolic dysfunction, may play an important role as an etiology of symptoms in patients with mitral regurgitation. The aim of this study is to study the presence of diastolic dysfunction in patients with MR and its association with symptom burden and exercise capacity.
详细描述
The study is an observational study of patients with mitral regurgitation undergoing LHC prior to mitral valve surgery or percutaneous mitral valve intervention. Prior to patients LHC they will undergo testing using CMR, CPET, and KCCQ. During the LHC, patients will undergo evaluation of intracardiac pressures and volumes using a specialized catheter which measures pressure and volume changes throughout the cardiac cycle.
CMR- CMR evaluation will quantify mitral regurgitant volume and fraction, right and left atrial size and function, and myocardial scar quantification.
CPET- objectively assess patients exercise capacity. KCCQ- is a standard questionnaire designed to assesses patients quality of life and symptom burden.
LHC- Pressure-volume loops will be measured during LHC. This will quantify left ventricular compliance and assess patients for the presence of diastolic dysfunction.
These evaluations will help us better understand the relationship between symptoms, exercise capacity, severity of MR and diastolic dysfunction.
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
- 18 Years 至 —（Adult, Older Adult）
- 性别
- Male
- 接受健康志愿者
- 否
入选标准
- •Age >=18 years of age
- •Able to give informed consent
- •Primary (degenerative) mitral regurgitation
- •LVEF >=50%
- •Undergoing cardiac catheterization
- •Able to exercise on a treadmill
排除标准
- •Unable to give informed consent
- •Secondary (functional) mitral regurgitation
- •LVEF <50%
- •Known coronary artery stenosis >=70% or past revascularization
- •More than mild aortic stenosis, mitral stenosis, aortic regurgitation, tricuspid regurgitation, or pulmonic regurgitation
- •Hypertrophic cardiomyopathy
- •Pregnancy
结局指标
主要结局
Diastolic Dysfunction Symptoms/exercise capacity
时间窗: Enrollment to testing completed 8 weeks
Assess the relationship between diastolic dysfunction. Diastolic dysfunction is measured by pressure volume loop assessment. Diastolic disfunction will be compared to patients symptom burden (as quantified by KCCQ) and exercise capacity (as quantified by CPET).
次要结局
- Mitral regurgitation severity and measures of diastolic dysfunction(enrollment to 8 weeks)
研究者
Seth Uretsky
Medical Director, Cardiovascular Imaging
Atlantic Health System