Strana 1 od 151 výsledky
OBJECTIVE
To perform a comparison of cardiac magnetic resonance (MR) imaging-derived ejection fraction (EF) during low-dose dobutamine infusion (EF(D)) with the extent of segments with transmural necrosis in more than 50% of their wall thickness (ETN) for the prediction of major adverse cardiac
Introduction: The concomitant presence of myocardial necrosis with myocardial ischemia, stunning and hibernation may complicate appraisal of left ventricular (LV) function and patient management. Several imaging modalities have been
Pathophysiological evolution of coronary (ischemic) heart disease in the following order: ischemia--dystrophy--necrosis (infarction)--myocardial sclerosis is postulated. The authors give clinical, instrumental, laboratory characteristics of ischemia, focal dystrophy with 2 types of manifestations:
Although removal of neutrophils from the arterial blood by mechanical filtration has been reported to prevent or reduce the severity of myocardial stunning caused by a 15 minute coronary artery occlusion in the dog, neutrophil filtration does not protect against myocardial dysfunction following a
OBJECTIVE
Levosimendan, a calcium sensitiser, and cariporide, a blocker of the Na+/H+ exchanger, decrease necrosis and improve function following myocardial ischaemia. However, their role in myocardial stunning is unclear. We tested the hypothesis that levosimendan, cariporide, or their combination
BACKGROUND
The heart is a tumor necrosis factor-alpha (TNF-alpha)-producing organ. Recent basic experimental and clinical evidence suggests that TNF-alpha is an important mediator of myocardial injury during acute myocardial infarction, chronic heart failure, cardiac allograft rejection, and
We report a male patient who had recurrent coronary artery spasm on withdrawal from cardiopulmonary bypass, which led to myocardial infarction and stunned myocardium. The spasm responded to conventional medication. Transesophageal echocardiogram showed no remarkable asynergy during the operation.
The "stunned" myocardium is the result of an ischemic insult which is not of sufficient severity to produce myocardial necrosis but affects myocardial function, biochemical processes and ultrastructure for a prolonged period of time. A "stunned" myocardium can be expected when preoperative asynergic
The hypothesis tested in this study was that despite the presence of severe postischemic myocardial dysfunction ("stunning"), the extraction and subsequent intracellular washout of thallium 201 should be preserved as long as irreversible sarcolemmal membrane injury was avoided. To produce myocardial
BACKGROUND
Despite numerous reports that one or more episodes of brief coronary artery occlusion preconditions the myocardium and dramatically reduces myocardial infarct size produced by a subsequent prolonged ischemia, we recently demonstrated that preconditioning does not attenuate contractile
In open-chest dogs the left anterior descending (LAD) coronary artery diagonal branch was encircled with a pneumatic occluder. Pairs of ultrasonic crystals were inserted into LAD myocardium and remote normal muscle. The coronary artery was occluded for 5 minutes, followed by 10 minutes of
Myocardial stunning commonly occurs after cardiopulmonary bypass (CPB). Myocardial stunning can be cardioprotective under some conditions, but in other situations may actually contribute to myocardial infarction (MI). Vascular endothelial stunning may be one of the mechanisms by which myocardial
Subarachnoid hemorrhage may be complicated by neurogenic stunned myocardium, a catecholamine-induced transient cardiomyopathy that displays a wide clinical spectrum of cardiac abnormalities, including electrocardiographic changes, arrhythmias, myocardial necrosis, and left ventricular systolic and
Analysing the literature data suggests that coronary angioplasty in acute myocardial infarction (AMI) fails to completely remove the focus of ischaemia, even in case of successful recanalization of the infarction-related artery. Inadequate post-angioplasty reperfusion of the infarction-stunned
In recent years, the use of thrombolytic therapy for the treatment of acute myocardial infarction has become the standard of care. A new phenomenon known as "stunned" myocardium has been described with the use of this treatment. Stunned myocardium refers to tissue that has been reperfused before of