The aim of the present study was to investigate the effects of spironolactone and losartan on the early healing stage of acute myocardial infarction (AMI) in rats. An AMI rat model was established and the rats were randomly divided into four groups: AMI (n=12), AMI + spironolactone (AMI + S; n=12), AMI + losartan (AMI + L; n=12) and AMI + spironolactone combined with losartan (AMI + S + L; n=12...

Experiments were performed to test the hypothesis that a reduction in the space constant contributes to slow conduction in the infarcted myocardium of dogs 5-8 days after coronary artery occlusion and reperfusion. Standard microelectrode techniques were used to measure action potential characteristics and conduction velocity parallel to fiber orientation in normal and infarcted ventricular epic...

Background A hypointense core of infarcted myocardium in T2-weighted cardiovascular MR (CMR) has been used as a noninvasive marker for intramyocardial hemorrhage. However, the clinical significance of such findings not yet been established. Aim of this study was to evaluate determinants and prognostic impact of a hypointense infarct core in T2weighted CMR images, studied in patients after acute...

BACKGROUND AND PURPOSE More effective imaging methods are needed to overcome the limitations of CT in the investigation of treatments for acute ischemic stroke. Diffusion-weighted MRI (DWI) is sensitive in detecting infarcted brain tissue, whereas perfusion-weighted MRI (PWI) can detect brain perfusion in the same imaging session. Combining these methods may help in identifying the ischemic pen...

AIMS Early reperfusion is mandatory for the treatment of acute myocardial infarction. This process, however, also induces additional loss of viable myocardium, called ischaemia-reperfusion (IR) injury. Complement activation plays an important role in IR injury, partly through binding of C5a to its major receptor (C5aR). We investigated the role of C5aR on infarct size and cardiac function in a ...

OBJECTIVES We evaluated the accuracy of in vivo delayed-enhancement multislice computed tomography (DE-MSCT) and delayed-enhancement magnetic resonance imaging (DE-MRI) for the assessment of myocardial infarct size using postmortem triphenyltetrazolium chloride (TTC) pathology as standard of reference. BACKGROUND The diagnostic value of DE-MSCT for the assessment of acute reperfused myocardia...

OBJECTIVES Stem cell therapy may be useful in chronic myocardial infarction (MI); this is conceivable, but not yet demonstrated in humans. BACKGROUND After acute MI, bone marrow-derived cells improve cardiac function. METHODS We treated 18 consecutive patients with chronic MI (5 months to 8.5 years old) by the intracoronary transplantation of autologous bone marrow mononuclear cells and compare...

UNLABELLED Coronary artery ligations to induce myocardial infarction (MI) in mice and rats are widely used in preclinical investigation. However, myocardial ischemic damage and subsequent infarct size are highly variable. The lack of standardization of the model impairs the probability of effective translation to the clinic. Cardiac Troponin I (cTnI) is a major clinically relevant biomarker. ...

The gravitational field is an important determinant of cardiovascular function. Exposure to microgravity during spaceflight may lead to a series of maladaptive alterations in the cardiovascular system. The authors have previously demonstrated that microgravity can increase the susceptibility to myocardial ischemia‑reperfusion (IR) injury under simulated microgravity. Although Notch1 signaling pr...