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AIMS High-sensitivity cardiac troponin I (cTnI) assays hold promise in detecting the transition from hypertrophy to heart failure in aortic stenosis. We sought to investigate the mechanism for troponin release in patients with aortic stenosis and whether plasma cTnI concentrations are associated with long-term outcome. METHODS AND RESULTS Plasma cTnI(More)
BACKGROUND Present therapies for acute coronary syndromes aim toward limiting platelet-platelet adhesion and aggregation processes. However, platelet-leukocyte interactions may contribute importantly to disease progression in the arterial wall. Recent studies suggest that prevention of platelet-leukocyte binding via P-selectin glycoprotein ligand-1 (PSGL-1)(More)
BACKGROUND To assess cardiovascular actions of APJ agonism during prolonged (Pyr(1))apelin-13 infusion and renin-angiotensin system activation. METHODS AND RESULTS Forty-eight volunteers and 12 patients with chronic stable heart failure attended a series of randomized placebo-controlled studies. Forearm blood flow, cardiac index, left ventricular(More)
BACKGROUND Elafin is a potent endogenous neutrophil elastase inhibitor that protects against myocardial inflammation and injury in preclinical models of ischaemic-reperfusion injury. We investigated whether elafin could inhibit myocardial ischaemia-reperfusion injury induced during coronary artery bypass graft (CABG) surgery. METHODS AND RESULTS In a(More)
BACKGROUND Inflammation following acute myocardial infarction (MI) has detrimental effects on reperfusion, myocardial remodelling, and ventricular function. Magnetic resonance imaging using ultrasmall superparamagnetic particles of iron oxide can detect cellular inflammation in tissues, and we therefore explored their role in acute MI in humans. METHODS(More)
BACKGROUND Cell therapy is an emerging and exciting novel treatment option for cardiovascular disease that relies on the delivery of functional cells to their target site. Monitoring and tracking cells to ensure tissue delivery and engraftment is a critical step in establishing clinical and therapeutic efficacy. The study aims were (1) to develop a Good(More)
BACKGROUND Mathematical modeling of perfusion cardiovascular magnetic resonance (CMR) data allows absolute quantification of myocardial blood flow and can potentially improve the diagnosis and prognostication of obstructive coronary artery disease (CAD), against the current clinical standard of visual assessments. This study compares the diagnostic(More)
BACKGROUND Preclinical data suggest that an acute inflammatory response following myocardial infarction (MI) accelerates systemic atherosclerosis. Using combined positron emission and computed tomography, we investigated whether this phenomenon occurs in humans. METHODS AND RESULTS Overall, 40 patients with MI and 40 with stable angina underwent thoracic(More)
Neutrophils and neutrophil-derived elastases play a major role in the regulation of vascular injury and inflammation, such as ischemia-reperfusion injury. Elafin is an endogenous inhibitor of neutrophil-derived elastases with numerous anti-inflammatory functions that include modulation of inflammatory cytokine release as well as innate and adaptive(More)
BACKGROUND Mathematical modeling of cardiovascular magnetic resonance perfusion data allows absolute quantification of myocardial blood flow. Saturation of left ventricle signal during standard contrast administration can compromise the input function used when applying these models. This saturation effect is evident during application of standard Fermi(More)