نتایج جستجو برای: noninvasive stress test
تعداد نتایج: 1242358 فیلتر نتایج به سال:
BACKGROUND AND PURPOSE Recently, noninvasive MRI methods have been developed that are now capable of detecting and mapping regional hemodynamic responses to various stress tests, which involve the use of vasoactive substances such as acetazolamide or inhalation of carbon dioxide. The aim of this study was to assess regional cerebral blood oxygenation changes during breath holding at 1.5 T. ME...
Patients treated with percutaneous coronary intervention (PCI) or coronary artery bypass graft (CABG) may have coronary artery disease (CAD) progression, in-stent restenosis (ISR), and graft occlusion. The noninvasive stress tests have limited ability to detect no-flow limiting lesions that may influence patient outcome. In contrast, computed tomography coronary angiography (cTCA) emerged as a ...
WHO declared COVID-19 infection as a pandemic since 2020. A rapid noninvasive examination is needed for screening and diagnostic. Exhaled Volatile Organic Compound (VOC) sample directly connected to the affected organ, which lung, can be measured an endogenous volatile marker resulted from oxidative stress. This study aims analyze differences in VOC concentration patients with pneumonia without...
Systemic oxidative stress is associated with a wide range of pathological conditions. Oxidative DNA damage is frequently measured in circulating lymphocytes. Mitochondrial DNA (mtDNA) is known to be more sensitive to oxidative damage than nuclear DNA but is rarely used for direct measurement of DNA damage in clinical studies. Based on the supercoiling-sensitive real-time PCR method, we propose ...
Identification of dipyridamole-induced regional wall motion abnormalities by echocardiography has recently been proposed as an alternative diagnostic stress test for coronary artery disease. This study evaluates this new technique by comparing the results obtained (overall, regionally and by abnormality type) with those of thallium-201 myocardial imaging after dipyridamole stress in 25 patients...
BACKGROUND Noninvasive cost-effective screening of hypertensive patients for renovascular hypertension is a desirable approach to a rare disorder. Currently many patients are screened with angiography, which is both invasive and expensive. METHODS A MEDLINE search from 1985 through July 1994 using the key words "renovascular hypertension," "noninvasive," "screening" generated 16 references. W...
The usefulness of stress tests as risk management tool crucially depends on the choice of stress scenarios: if the scenario is too implausible, the stress test results will be ignored by management. Unfortunately, there is no generally accepted standard how to choose scenarios. Many institutions apply some standardized scenarios derived from extreme market moves in the past. A substantial drawb...
Because nonalcoholic steatohepatitis can progress towards cirrhosis even in children, early detection of hepatic fibrosis and accurate diagnosis of nonalcoholic fatty liver disease (NAFLD) are important. Although liver biopsy is regarded as the gold standard of diagnosis, its clinical application is somewhat limited in children due to its invasiveness. Noninvasive diagnostic methods, including ...
C urrent clinical practice for patients presenting to the emergency department with a resolved episode of chest pain and no electrographic or biomarker abnormalities is to conduct routine noninvasive testing, in accordance with American College of Cardiology and American Heart Association guidelines. The rationale is to further reduce the risk of missing a myocardial infarction, a major source ...
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