Active clinical trials for "Myocardial Infarction"

The purpose of this study is to determine the predictors of right ventricular damage (RVD) assessed by wall motion abnormalities, edema, myocardial salvage and delayed enhancement (DE)cardiac magnetic resonance imaging in acute ST-elevation myocardial infarction (STEMI) and its prognostic significance. The investigators hypothesize that ischemia related changes of the myocardium are also visible in the right ventricle and that they have an impact on patient outcome.

The OPTIMISE study is a prospective, multi-center, multi-national, structured data collection initiative, first compiling data on the current treatment of post myocardial infarction patients (screening-log) and then, prospectively evaluating only those patients being prescribed Omacor as part of their standard secondary prevention treatment. The aim is to observe the Omacor cohort of patients for a period of 12 months, collecting long term observational data as clinical and patient-reported outcomes, especially, but not exclusively, recurrent non fatal Myocardial Infarction (MI), sudden death, or new Congestive Heart Failure (CHF). No predefined additional visits, medical tests, labs, procedures or interventions will be mandated. Only results from routinely performed tests, labs, procedures and/or interventions will be collected if available.

This purpose of this research project is to test the diagnostic accuracy (i.e., sensitivity, specificity, positive and negative predictive value, and receiver operator curve area under the curve) of cardiac computed tomography (CT) perfusion as compared to the best non-invasive test of blood flow -- cardiac positron emission transmission (PET) perfusion imaging. The primary outcome of the study is to determine the CT perfusion technique with the highest overall diagnostic accuracy measured by the highest area under the receiver operator curve. The investigators will test 4 different CT perfusion techniques. (A) Qualitative, visual inspection of the contrast-enhanced CT images (B) Enhanced voxel distribution analysis (C) Rate of myocardial contrast enhancement analysis (D) Quantitative heart blood flow using a distributed 2-region analysis A second aim is to reduce the radiation dose needed to maintain CT perfusion diagnostic accuracy. Using the CT perfusion data, the investigators will model the minimal number of cardiac cycle radiation exposures needed to keep the diagnostic accuracy similar to the full data set. A third aim is to test the incremental diagnostic accuracy of CT angiography plus CT perfusion to identify regions of low blood flow as compared to PET perfusion alone.

Specific cardiovascular diseases, such as stroke and heart attack, have been shown to vary by ethnic group. However, less is known about differences between ethnic groups and a wider range of cardiovascular diseases. This study will examine differences between ethnic groups (White, Black, South Asian and Mixed/Other) and first lifetime presentation of twelve different cardiovascular diseases. This information may help to predict the onset of cardiovascular diseases and inform disease prevention strategies. The hypothesis is that different ethnic groups have differing associations with the range of cardiovascular diseases studied.

Implication of left veNtricle vortex flow guided aNticOagulation therapy for preVenting Apical Thrombus formation In patients with acute myOcardial infarctioN: Multicenter Prospective Randomized Clinical Trial; INNOVATION study

Observatory multicenter, prospective, to support the acute phase of acute coronary syndromes with ST segment elevation ST (myocardial infarction).

To investigate hemostatic variables in relation to cardiovascular risk in the Framingham Offspring Study cohort.

To investigate stroke risk using the National Academy of Sciences Twin Registry.

To identify the role of salt-sensitivity of blood pressure in the pathogenesis of hypertension.

Options for coronary revascularization include stent implantation and coronary bypass surgery. Both modalities have their unique advantages and disadvantages in terms of clinical outcomes as well as financial impact on the medical system. We wish to investigate the late results of patients undergoing coronary revascularization, the need for re-hospitalization, re-intervention, patient satisfaction as well as the financial burden on the medical system. The study will be conducted by historical prospective review of hospital records in conjunction with records of the medical insurance companies ("HMO's").