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78 active trials for Myocardial Ischemia

MRI of Myocardial Infarction

Heart failure (HF) is an enormous health burden affecting approximately 5.1 million people in the US and is the cause of 250,000 deaths each year. Approximately 50% of HF is caused by myocardial ischemia and requires immediate restoration of coronary blood flow to the affected myocardium. However, the success of reperfusion is partly limited by intramyocardial hemorrhage, which is the deposition of intravascular material into the myocardium. Hemorrhagic reperfusion injury has high prevalence and patients have a much greater risk of adverse left ventricular remodeling, risk of fatal arrhythmia, impaired systolic function and are hospitalized at a greater rate. Recent magnetic resonance imaging techniques have improved assessment of reperfusion injury, however, the association between MRI contrasts and reperfusion injury is highly unclear, and lacks specificity to IMH. Improved imaging of IMH and accurate knowledge about its spatial and temporal evolution may be essential for delivery of optimal medical therapy in patients and critical to identify patients most at risk for adverse ventricular remodeling. The overall goal is to investigate the magnetic properties of hemorrhage and develop MRI techniques with improved specificity to hemorrhage. New MRI techniques permit noninvasive assessment of the magnetic susceptibility of tissues and can target tissue iron. Therefore, the investigators hypothesize that MRI imaging of myocardial magnetic susceptibility can map hemorrhagic myocardium. The investigators will perform a longitudinal observational study in patients after reperfusion injury to validate these methods, compare the methods with conventional MR contrasts and develop MR methods for imaging humans.

Philadelphia, PennsylvaniaStart: April 2018
International Study of Comparative Health Effectiveness With Medical and Invasive Approaches (ISCHEMIA)

The purpose of the ISCHEMIA trial is to determine the best management strategy for higher-risk patients with stable ischemic heart disease (SIHD). This is a multicenter randomized controlled trial with 5179 randomized participants with moderate or severe ischemia on stress testing. A blinded coronary computed tomography angiogram (CCTA) was performed in most participants with eGFR ≥60 mL/min/1.73m2 to identify and exclude participants with either significant unprotected left main disease (≥50% stenosis) or those without obstructive CAD (<50% stenosis in all major coronary arteries). Of 8518 participants enrolled, those that had insufficient ischemia, ineligible anatomy demonstrated on CCTA or another exclusion criterion, did not go on to randomization. Eligible participants were then assigned at random to a routine invasive strategy (INV) with cardiac catheterization followed by revascularization, if feasible, plus optimal medical therapy (OMT) or to a conservative strategy (CON) of OMT, with cardiac catheterization and revascularization reserved for those who fail OMT. SPECIFIC AIMS A. Primary Aim The primary aim of the ISCHEMIA trial is to determine whether an initial invasive strategy of cardiac catheterization followed by optimal revascularization, if feasible, in addition to OMT, will reduce the primary composite endpoint of cardiovascular death, nonfatal myocardial infarction, resuscitated cardiac arrest, or hospitalization for unstable angina or heart failure in participants with SIHD and moderate or severe ischemia over an average follow-up of approximately 3.5 years compared with an initial conservative strategy of OMT alone with catheterization reserved for failure of OMT. B. Secondary Aims Secondary aims are to determine whether an initial invasive strategy compared to a conservative strategy will improve: 1) the composite of CV death or MI; 2) angina symptoms and quality of life, as assessed by the Seattle Angina Questionnaire; 3) all-cause mortality; 4) net clinical benefit assessed by including stroke in the primary and secondary composite endpoints; and 5) individual components of the composite endpoints. Condition: Coronary Disease Procedure: Coronary CT Angiogram Procedure: Cardiac catheterization Phase: Phase III per NIH Condition: Cardiovascular Diseases Procedure: Angioplasty, Transluminal, Percutaneous Coronary, other catheter-based interventions Phase: Phase III per NIH Condition: Heart Diseases Procedure: Coronary Artery Bypass Surgery Phase: Phase III per NIH

Sao PauloStart: July 2012
Secondary Event Prevention Using Population Risk Management After PCI and for Anti-Rheumatic Medications

Ischemic heart disease (IHD) and its treatment carry profound public health and economic implications. Among Veterans, IHD represents one of the most common causes of death and disability, with over 500,000 affected individuals' annually. Rheumatic disease, though far less common than IHD can affect multiple organ systems and requires therapies costing in excess of $50,000 a year. Optimal treatment of Veterans with IHD and rheumatic disease requires a number of medications to maintain or improve health. Not taking medications as prescribed, however, is common and increases the risk of subsequent adverse events (cardiac death and myocardial infarction [MI]). To improve medication adherence rates and the cardiac health of Veterans with IHD, the investigators propose to test a medication adherence intervention. Known as VA SEPPRMACI-ARM (Secondary Event Prevention using Population Risk Management After PCI and for Anti-Rheumatic Medications), this intervention will consist of: proactive real-time adherence monitoring of patients and targeting of individuals if they have not refilled their medication a given number of days after it was due for refill. The intervention will employ a tailored, escalating-intensity approach which begins with some combination of personalized short messaging service (SMS) text messages and interactive voice response (IVR) telephone technology, depending on patient preference. Patients not completing SMS and then IVR by not refilling their medication (or declining SMS and not completing IVR) escalate to a trained research interventionalist. The interventionalist will contact the patient and address adherence barriers based on the dimensions outlined by the World Health Organization (WHO) that are specific to each patient. The investigators will test the intervention on IHD patients who have recently undergone PCI-a cardiac procedure commonly used among IHD patients to improve the heart's blood flow and in patients starting anti-rheumatic medication. The investigators will test the intervention at four VA Cardiac Catheterization Laboratories (CCLs) and have 12 sites serving as usual care controls.

Durham, North CarolinaStart: October 2016
ISCHEMIA-EXTENDed Follow-up

The International Study of Comparative Health Effectiveness with Medical and Invasive Approaches (ISCHEMIA) EXTENDed Follow-up (ISCHEMIA-EXTEND) is the long-term follow-up of randomized, surviving participants in ISCHEMIA. ISCHEMIA was an NHLBI-supported trial that randomized 5,179 participants with stable ischemic heart disease to two different management strategies: 1) an initial invasive strategy (INV) of cardiac catheterization and revascularization when feasible plus guideline-directed medical therapy (GDMT), or 2) an initial conservative strategy (CON) of GDMT. The trial did not demonstrate a reduction in the primary endpoint with an initial invasive strategy. There was an excess of procedural myocardial infarction (MI) and a reduction in spontaneous MI in the INV group. Prior evidence suggests that spontaneous MI carries a higher risk of subsequent death than procedural MI. There was a late separation in the cardiovascular (CV) mortality curves, over a median of 3.2 years follow-up in ISCHEMIA. The MI incidence curves crossed at approximately 2 years. Therefore, based on the observed reduction in spontaneous MI, it is imperative to ascertain long-term vital status to provide patients and clinicians with robust evidence on whether an invasive strategy reduces CV and all-cause death over the long-term. With projected 728 CV deaths we have adequate power to detect a between-group difference in mortality. We will also quantify the impact of nonfatal CV events on subsequent mortality in ISCHEMIA-EXTEND, construct a risk score for mortality using baseline deep phenotypic data, and provide estimates of the impact of the invasive strategy in the highest risk subgroup - those with severe coronary artery disease for whom current practice guidelines recommend coronary artery bypass (CABG) to improve survival. SPECIFIC AIMS Aim 1. To assess whether an initial invasive strategy reduces long-term CV mortality compared with an initial conservative strategy in SIHD patients with at least moderate ischemia on stress testing, over 10 years median follow-up. Aim 2. To assess the impact of nonfatal events on long-term CV and all-cause mortality Aim 3. To construct risk scores for CV and all-cause mortality using phenotypic data including clinical factors, stress test findings, and details of coronary anatomy. Condition: Coronary Disease Procedure: Observational Phase: Phase III per NIH Condition: Cardiovascular Diseases Procedure: Observational Phase: Phase III per NIH Condition: Heart Diseases Procedure: Observational Phase: Phase III per NIH

Start: July 2012