Active clinical trials for "Infarction"

The aim of this study is to improve the detection of heart attack in people who come to a hospital emergency room (ER) with cardiac symptoms. We are testing a novel technology that calculates the heart's electrical activity at points all around the upper body torso and develops a map showing areas indicating heart attack. Our hypothesis is that this new body mapping technique will be better than the standard electrocardiogram (ECG) in detecting heart attack.

This is an observational study to determine the association between social support and functional status after a myocardial infarct

The purpose of this study was to develope and evaluate a new method for risk stratification which predicts high mortality risk in patients with cardiac disease based on simultateous examination of high resolution ECG, continuous arterial pressure and a breathing signal.

Viability assessment remains a clinical challenge in patient with coronary artery disease and left ventricular dysfunction. Several imaging modalities are available for evaluating myocardial viability, based either on perfusion or on contractile reserve analysis. Briefly, perfusion analysis is highly sensitive and contractile reserve highly specific. A combined analysis of both perfusion and contractile reserve has been proposed to improve the diagnostic accuracy in patient referred for a revascularization procedure. However, the value of this combined analysis has not been validated in unselected patients referred for viability assessment. The patients enrolled in the study will undergo a nitrate enhanced rest gated SPECT using a Tc-99m labeled tracer (sestamibi or tetrofosmine) followed by a second gated SPECT acquired during a low-dose dobutamine infusion (10 mcg/kg/mn). All patients will have a 6-month clinical and imaging follow-up, including physical examination and a nitrate enhanced rest gated SPECT using the same radiopharmaceutical. All treatments received during this 6-month period will be recorded, including medical therapy and coronary revascularization (angioplasty, stenting and CABG). Finally, the value of baseline perfusion and contractile reserve analysis in predicting left ventricular ejection fraction changes at 6-month follow-up will be evaluated.

Introduction For several years "ischemic" electrocardiographic (ECG) changes in the acute phase of ischemic stroke have been reported. Whether these ECG changes reflect true myocardial ischemia remains controversial. So far no study has assessed different markers of myocardial ischemia or necrosis in consecutive patients admitted to hospital with an acute ischemic stroke. Purpose The main purpose of this study is to determine the potential burden of reversible and irreversible myocardial ischemia in patients with an acute ischemic stroke. Patients and methods Serial blood samples for measuring troponin T, CK-MB and NT-proBNP are collected in 250 patients with evidence of an acute ischemic stroke admitted to the Department of Neurology at Odense University Hospital. In addition resting 12-lead ECG recordings will be obtained on a daily basis, and a 24-hour ST-segment ambulatory monitoring will be performed once within the first week of hospitalisation. Finally, myocardial perfusion patterns during rest will be evaluated by means of a myocardial perfusion scintigraphy in patients with an elevated troponin T level. Six months later control measurements of troponin T, CK-MB and NT-proBNP and a 12-lead ECG will be obtained. Expectations The study will contribute with original observations in patients with acute ischemic stroke considering the following issues: The prevalence and characteristics of ECG changes suggestive of myocardial ischemia. The prevalence of transient ST-segment changes on ambulatory monitoring. The prevalence and degree of myocardial necrosis as judged from biochemical markers. The prevalence of reversible and irreversible perfusion defects on myocardial scintigraphy. The prevalence, size and patterns of NT-proBNP. Whether there is a change in ECG and biochemical markers over a 6-month follow-up period. The results may have clinical implications regarding early and late treatment as well as clinical follow-up of patients recovering from an episode of acute ischemic stroke.

To continue surveillance of cardiovascular disease risk factors in the seven-county area of Minneapolis-St. Paul.

To determine the predictors of perioperative cardiac morbidity and mortality in patients at high risk who underwent major noncardiac surgery with general anesthesia.

To explain the extremely low cardiovascular mortality among Physicians' Health Study (PHS) participants by ascertaining all cardiovascular and total deaths among the 90,457 physicians who returned enrollment forms but were not randomized into the study. Also, to compare the mortality experience of randomized physicians with various subgroups of non-participants.

To examine the natural history of mortality due to coronary heart disease in post-myocardial infarction patients from the Beta-Blocker Heart Attack Trial (BHAT) and the Aspirin Myocardial Infarction Study (AMIS).

The purpose of this study is to answer, among others, the following questions: 1) What are the outcomes when using the radial artery as a bypass graft in coronary artery bypass surgery (CABG)? 2) Can multidetector computed tomography (CT) be used to reliably evaluate coronary artery bypass graft patency?