Track topics on Twitter Track topics that are important to you
Coronary heart disease and stroke are leading causes of mortality for men and women in the United States. Current understanding of the pathogenesis of and the risk factors for cardiovascular disease (CVD) is derived largely from prospective studies of clinically overt disease. Unfortunately, clinical risk factors for CVD defined by these methods fail to predict a large proportion of CVD events, and some subjects at high clinical risk fail to develop overt disease. Subclinical disease precedes clinical by years/decades but is difficult to quantify. For example, left ventricular hypertrophy (LVH) and aortic atherosclerosis are strong predictors of CVD events, but are difficult to accurately non-invasively quantify, especially among the elderly and overweight subjects (both growing populations in the U.S.). MRI permits accurate assessment of cardiac anatomy/function and subclinical aortic atherosclerosis.
The underlying hypothesis of this study is that subclinical cardiovascular disease (CVD) is a precursor to overt CVD, and that magnetic resonance imaging (MRI) measures of subclinical aortic and cardiac anatomic disease are superior for the characterization of risk as compared with current measures of risk factors as well as more conventional imaging (e.g., carotid ultrasound, echo). Longitudinal/time-averaged indexes of all established risk factors for CVD have been collected in the Framingham Heart Study (FHS). These time-averaged indexes are stronger predictors of clinical CVD than single measures. In a Pilot study of 312 FHS Offspring subjects, MRI measures of LV mass were successfully acquired in a larger proportion of subjects than echo, and MR evidence of LVH and subclinical aortic disease correlated more strongly (than echo and carotid ultrasound measures) with these time-averaged indexes. Application of MRI methods in the FHS offers an opportunity to identify subclinical atherosclerosis and LVH in this well-characterized cohort and to relate these data with conventional imaging measures already acquired in this cohort. Importantly, the near-concurrent acquisition of brain MRI/neuropsychologic examination in the same FHS cohort offer the unique contemporaneous opportunity to examine subclinical cerebrovascular disease with MRI indexes of subclinical atherosclerosis. The study will expand the Pilot study to perform heart and thoracic/abdominal aorta MRI studies in 2400 FHS participants to allow for identification of individual CVD risk factors for subclinical atherosclerosis. These population-based data will extend knowledge of the distribution and severity of atherosclerosis in adult men and women and their relations to existing echo, carotid ultrasound and brain MRI measures. This study provides the rare opportunity to examine associations of quantitative MRI measures of aortic atherosclerosis and LVH with both cross-sectional and time-averaged measures of individual atherosclerotic risk factors (e.g., blood pressure, cigarette smoking, and cholesterol) and with novel inflammatory markers (e.g., C-reactive protein, MCP-1). Further, because the FHS consists of hundreds of sibships for which a DNA repository has been established, the heritability of MRI indexes of atherosclerosis and LVH will be determined, laying the groundwork for future genetic studies.
National Heart, Lung, and Blood Institute (NHLBI)
Published on BioPortfolio: 2014-08-27T03:55:58-0400
To determine the factors associated with progression of sub-clinical atherosclerosis and to evaluate the associations between the progression of sub-clinical atherosclerosis and the develo...
Atherosclerosis vaccine, V6, has been through two small-scale Phase II open label clinical trials. It has shown significant improvement in lipid profile in patients with overweight or obes...
To evaluate common genetic variations, that in combination with exposure to tobacco smoke, may modify the risk of atherosclerosis.
To measure by gas-liquid chromatography the relative concentrations of all saturated and unsaturated fatty acids found in the cholesterol ester and phospholipid fractions of plasma from 4,...
The purpose of this study is to determine the effects of estrogen replacement therapy (ERT) on the progression of early atherosclerosis in healthy postmenopausal women without preexisting ...
Leukocytosis, particularly monocytosis, has been shown to promote atherosclerosis in both diabetic and non-diabetic mouse models. We previously showed that hyperglycemia independently promotes monocyt...
Hepatocyte growth factor (HGF) has previously been associated with risk of stroke, coronary heart disease, and atherosclerosis. We hypothesized that higher circulating HGF is associated with greater p...
Vascular biglycan contributes to atherosclerosis development and increased biglycan expression correlates with increased atherosclerosis. However, mice deficient in biglycan have either no reduction i...
Low levels of vitamin D are suspected to be a risk factor for cardiovascular disease and atherosclerosis. The aim of this study was to assess the prevalence of subclinical atherosclerosis among Inuit ...
Lack of perfusion in the EXTREMITIES resulting from atherosclerosis. It is characterized by INTERMITTENT CLAUDICATION, and an ANKLE BRACHIAL INDEX of 0.9 or less.
Complete blockage of blood flow through one of the CORONARY ARTERIES, usually from CORONARY ATHEROSCLEROSIS.
A drug that has been given by mouth in the treatment of atherosclerosis and other vascular disorders, hyperlipidemias, and thrombo-embolic disorders. (From Martindale, The Extra Pharmacopoeia, 30th ed, p1408)
A measurement of the thickness of the carotid artery walls. It is measured by B-mode ULTRASONOGRAPHY and is used as a surrogate marker for ATHEROSCLEROSIS.
Abnormal balloon- or sac-like dilatation in the wall of CORONARY VESSELS. Most coronary aneurysms are due to CORONARY ATHEROSCLEROSIS, and the rest are due to inflammatory diseases, such as KAWASAKI DISEASE.
Cardiovascular disease (CVD)
Acute Coronary Syndromes (ACS) Blood Cardiovascular Dialysis Hypertension Stent Stroke Vascular Cardiovascular disease (CVD) includes all the diseases of the heart and circulation including coronary heart disease (angina...