نتایج جستجو برای: diffuse lad lesions
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Metody przeszukiwania w przestrzeni stanów sformu lowane by ly w postaci dość ogólnej, jednak wymaga ly reprezentacji zagadnienia we w laściwej formie, tzn. przestrzeni stanów, zbioru operatorów, a dodatkowo przydatna/potrzebna by la informacja heurystyczna w formie funkcji oceny stanów. Ogólnie, format i sposób reprezentacji wiedzy o zagadnieniu sa֒ niezwykle istotne i maja֒ bezpośredni wp lyw n...
Introduction: Primary percutaneous coronary intervention (PPCI) is used for the treatment of ST segment elevation myocardial infarction (STEMI). Anterior STEMI is associated with adverse outcomes, and it is possible that the presence of ramus intermedius (RI) would inversely affect the outcome. This research involved the evaluation of the influence of RI presence on clinical ou...
We report an unusual case, a 56-year-old male whose right coronary artery (RCA) originated as a separate branch from the middle part of the left anterior descending artery (LAD), undergoing acute coronary syndrome. He had multiple coronary risk factors, including diabetes mellitus and cigarette smoking, in addition to age. Electrocardiograms revealed extensive and prominent ST segment elevation...
In multiple sclerosis (MS), diffuse degenerative processes in the deep grey matter have been associated with clinical disabilities. We performed a systematic study in MS deep grey matter with a focus on the incidence and topographical distribution of lesions in relation to white matter and cortex in a total sample of 75 MS autopsy patients and 12 controls. In addition, detailed analyses of infl...
In this paper, the l1 norm penalty on the filter coefficients is incorporated in the least mean absolute deviation (LAD) algorithm to improve the performance of the LAD algorithm. The performance of LAD, zero-attracting LAD (ZA-LAD) and reweighted zero-attracting LAD (RZA-LAD) are evaluated for linear time varying system identification under the non-Gaussian (α-stable) noise environments. Effec...
A 33-year-old woman presented an anterior myocardial infarction treated with fibrinolytics. On coronary angiography performed a few days later, a dissection of the left anterior descending artery (LAD) was observed, with no lesions in other vessels. The patient was stable and showed no symptoms; hence revascularization treatment was not performed at that time. One week later the patient returne...
Wellens' syndrome is a pattern of electrocardiographic T-wave changes associated with critical, proximal left anterior descending (LAD) artery stenosis. We herein report 2 cases of Wellens' syndrome with segmental wall-motion abnormalities The first case is a 50-year-old man admitted to the emergency department with typical chest pain. Admission ECG showed biphasic T waves in leads V1-V3 with i...
Cardiac injury occasionally occurs as a result of blunt chest trauma. Most cardiac complications in chest trauma are due to myocardial contusion rather than direct damage to the coronary arteries. However, traumatic coronary injury has been reported, and a variety of underlying pathophysiological mechanisms have been proposed. We present a 26 year old patient presenting with an acute coronary s...
The significance of exercise-induced ST-segment elevation remains unsettled. We reviewed the treadmill tests of 840 consecutive patients and exercise-induced ST-segment elevation was noted in 29 (3.5%). Only eight of these (28%) stopped because of angina. Anterior myocardial infarction (AMI) was found on the resting electrocardiogram in 25 (85%). Angiographic studies performed on 21 showed crit...
In the presence of severe stenosis, coronary artery flow may be reduced at rest. Recent advances in echocardiography have made non-invasive sampling of velocities in the left anterior descending coronary artery (LAD) possible. The aim of our study was to evaluate feasibility and capability of transthoracic Doppler to detect severe stenosis of the LAD. The study population consisted of 42 subjec...
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