Non-invasive Liver Screening for Risk Assessment for Coronary Heart Disease
Coronary DiseaseNon-alcoholic Fatty Liver Disease1 moreBackground: Non-alcoholic fatty liver disease (NAFLD) is the hepatic manifestation of the metabolic syndrome, which is one of the major risk factors of coronary heart disease (CHD). CHD is the most important manifestation of atherosclerosis, because of its immense morbidity and mortality. Transient elastography (TE, Fibroscan®) including the currently developed controlled attenuation parameter (CAP) is a non-invasive method for evaluation of liver fibrosis and steatosis, which is already implemented in routine care of patients with NAFLD. Hypothesis: The use of TE with CAP as screening for NAFLD might be an easy tool for risk assessment for CHD. Methods: Patients scheduled for routine coronary angiography will be screened for manifestation of NAFLD by TE including CAP, conventional ultrasound, clinical and laboratory parameters. Patients will be stratified for the presence of CHD based on the angiography results and correlation analysis with liver fat content will be performed. NFALD screening will be validated in a subgroup by MR-based measurements.
Correlation Between NAFLD, Epicardial Adipose Tissue and Vascular Inflammation Measured by Positron...
AtherosclerosisNon-alcoholic Fatty Liver DiseaseVascular inflammation is a key factor in both the pathogenesis and outcome of atherosclerosis. 18F-fluorodeoxyglucose (FDG) positron emission tomography (PET) is a promising tool for identifying and quantifying vascular inflammation within atherosclerotic plaques. Non-alcoholic fatty liver disease (NAFLD) is closely associated with many cardiometabolic risk factors. NAFLD can be detected by measuring liver fat accumulation using computed tomography (CT). Also epicardial adipose tissue (EAT) volume as determined by computed tomography (CT) is an independent marker of cardiovascular events in the general population. Therefore, the purpose of this investigators study is to compare the NAFLD severity and EAT volume with FDG uptake measured by PET/CT.
Palmitate Breath Test to Assess Fatty Acid Oxidation in Non Alcoholic Fatty Liver Disease (NAFLD)...
Fatty LiverBackground: - Non-alcoholic fatty liver disease (NAFLD) is a common cause of abnormal liver tests. It is closely linked to health problems like obesity and diabetes. Researchers want to use a breath test to measure the metabolism of fatty acids and learn more about the causes of disease. They will compare the results between people who do and do not have NAFLD. They will also repeat the test in people with NAFLD after treatment to see improvement. Objectives: - To measure the metabolism of fatty acids and compare them between people who do and do not have NAFLD, and people with NAFLD before and after treatment. Eligibility: People age 21 and older with NAFLD Healthy volunteers non-NAFLD metabolic syndrome Design: Participants will be screened with medical history, physical exam, and fasting blood tests. Participants will fast overnight. Participants will sit in a comfortable chair. They will relax for 15 minutes. Then a narrow plastic tube will be put under their nostrils. It will be connected to a breath test device. Participants will drink palmitate or acetate in a heated liquid meal (Ensure). Palmitate is a fatty acid and acetate is a small molecule that is a building block for fatty acids. Both palmitate and acetate are natural compounds that are in our body and our food. Participants will sit for 6 hours. They can read, watch television, work on a computer, or other relaxed activity. The air they breathe out from their nose will be collected and analyzed. They may take a bathroom break after 3 hours. They may drink water after 3 hours. Participants will get a meal after the test. Participants will have another visit at least 1 week later. They will repeat the test with the other compound (acetate of palmitate). Participants may be asked to repeat a test to study the result of a change like weight loss or medicine. Thus, participation can last from 1 week to several years.
Default Mode Network fMRI Maps as a Predictive Index of Hepatic Encephalopathy Outcome
Hepatic EncephalopathyCirrhosis2 moreInvestigating the impact of hepatic encephalopathy on default mode networks within the brain to provide more clues with understanding the physiology of consciousness and predicting the reversibility of comatose states.
Noninvasive Staging of Liver Fibrosis: MR vs Ultrasound
Hepatitis CHepatitis B2 moreLiver fibrosis is an important public health problem, with a substantial morbidity and mortality due to progression to cirrhosis and hepatocellular carcinoma. All causes of chronic liver disease may lead to fibrosis. The traditional diagnostic approach requires a biopsy for assessing the severity of liver disease prior to therapy. However, liver biopsy has several limitations: cost, sampling error, and procedure-related morbidity and mortality. Considering the high prevalence of viral hepatitis and nonalcoholic fatty liver disease, a condition often associated with obesity and type 2 diabetes, there is an urgent need for noninvasive screening, diagnosis and monitoring strategies of chronic liver disease severity. Our team has the expertise to investigate ultrasound-based and magnetic resonance-based elastographic methods for the noninvasive staging of liver fibrosis. The primary objective of this cross-sectional study is to compare the sensitivity of elastographic methods for detecting histology-determined significant fibrosis. The secondary objectives are to compare the diagnostic accuracy of these elastographic methods and the influence of potential confounders (inflammation, steatosis and iron deposition) on their diagnostic accuracy.
Reversal of Right Ventricular Steatosis in Pulmonary Hypertension
Pulmonary; HypertensionSteatosis1 moreThe goal of this study is to elucidate the relationship between myocardial right ventricular triglyceride content (steatosis) and right ventricular dysfunction in participants with pulmonary hypertension, and investigate reversibility of this phenotype with omega-3 fatty acid treatment.
Using Infrared Spectroscopy for Diagnosis Severity of Nonalcoholic Fatty Liver Disease
Fatty LiverNon-alcoholic Fatty Liver DiseaseThe main objective of this study is to evaluate the ability of infrared spectroscopy to discriminate simple hepatic steatosis from NASH
Evaluation of 4 MRI Methods (PDFF 3, 6 and 11 Gradient Echoes and Spectroscopy) Compared to the...
Hepatic SteatosisMRI2 moreEvaluation of 4 MRI methods (PDFF 3, 6 and 11 gradient echoes and Spectroscopy) compared to the reference method (liver biopsy) in quantification of hepatic steatosis
The Liver in the World Trade Center Health Program General Responder Cohort and Controls
Steatosis of LiverNASH - Nonalcoholic SteatohepatitisThis project investigates whether exposure to the World Trade Center Attack is a risk factor for liver injury.
Screening Diabetes Patients for NAFLD With Controlled Attenuation Parameter and Liver Stiffness...
Non-alcoholic Fatty Liver DiseaseThe purpose of this study is to compare the severity of NAFLD in diabetic patients to that in non-diabetic patients.