نتایج جستجو برای: ccta
تعداد نتایج: 617 فیلتر نتایج به سال:
OBJECTIVES This study aimed to measure the absorbed doses in selected organs for prospectively ECG-triggered coronary computed tomography angiography (CCTA) using five different generations CT scanners in a female adult anthropomorphic phantom and to estimate the effective dose (HE). MATERIALS AND METHODS Prospectively ECG-triggered CCTA was performed using five commercially available CT scan...
INTRODUCTION Coronary computed-tomography angiography (CCTA) has high diagnostic performance, but it sometimes does not allow evaluation because of artifacts. Currently, the use of a β-blocker is recommended to prevent motion artifacts, but the β-blocker (metoprolol, propranolol, etc.) commonly used has a slow onset and long duration of action. Landiolol hydrochloride is an intravenous β1-block...
AIMS To date, the therapeutic benefit of revascularization vs. medical therapy for stable individuals undergoing invasive coronary angiography (ICA) based upon coronary computed tomographic angiography (CCTA) findings has not been examined. METHODS AND RESULTS We examined 15 223 patients without known coronary artery disease (CAD) undergoing CCTA from eight sites and six countries who were fo...
I read with great interest the article entitled ‘Does coronary CT angiography improve risk stratification over coronary calcium scoring in symptomatic patients with suspected coronary artery disease? Results from the prospective multicenter international CONFIRM registry’ from Al-Mallah et al. published in European Heart Journal Cardiovascular Imaging. Perhaps, an unanswered question that could...
BACKGROUND Coronary computed tomographic angiography (CCTA) is not indicated in the setting of acute myocardial infarction in the emergency department (ED). Nonetheless, acute coronary syndromes may have atypical presentations, and CCTA may be inadvertently performed in this setting. OBJECTIVES This study was designed to determine the frequency and characteristics of CCTA imaging of unsuspect...
Accurate diagnosis of Clostridium difficile infection (CDI) is essential for optimal treatment, prevention and control. There are two reference assays for CDI diagnosis: the cell cytotoxicity assay (CCTA) and toxigenic culture (TC). Importantly, these tests actually detect different targets: CCTA detects the presence of C difficile toxins (primarily toxin B, but also toxin A), whereas TC detect...
AIM To evaluate the efficacy of the Cardiac Magnetic Resonance Perfusion (CMRP) method in detection of Coronary Artery Disease (CAD) by comparing CMRP findings with the results of Coronary Computed Tomography Angiography (CCTA) or Catheter Coronary Angiography (CCA). METHODS Thirty one patients in whom CMRP was performed along with CCTA or CCA within a month after CMRP between December 2009 a...
BACKGROUND In response to growing concerns regarding the overuse of coronary computed tomography angiography (CCTA) in the clinical setting, multiple societies, including the American College of Cardiology Foundation, have jointly published revised criteria regarding the appropriate use of this imaging modality. However, previous research indicates significant discrepancies in the rate of adher...
After a decade of clinical use of coronary computed tomographic angiography (CCTA) to evaluate the anatomic severity of coronary artery disease, new methods of deriving functional information from CCTA have been developed. These methods utilize the anatomic information provided by CCTA in conjunction with computational fluid dynamics to calculate fractional flow reserve (FFR) values from CCTA i...
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