نتایج جستجو برای: ccta
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The aims of this study were to compare the image noise and quality of coronary computed tomographic angiography (CCTA) at 80 kVp with knowledge-based iterative model reconstruction (IMR) to those of CCTA at 100 kVp with hybrid iterative reconstruction (IR), and to evaluate the feasibility of a low-dose radiation protocol with IMR. Thirty subjects who underwent prospective electrocardiogram-gati...
BACKGROUND Large multicenter studies validating the prognostic value of coronary computed tomographic angiography (CCTA) and left ventricular ejection fraction (LVEF) are lacking. We sought to confirm the independent and incremental prognostic value of coronary artery disease (CAD) severity measured using 64-slice CCTA over LVEF and clinical variables. METHODS AND RESULTS A large internationa...
RATIONALE AND OBJECTIVES Concerns for patient's risk of radiation-induced cancer have increased demand for reduced-dose coronary computed tomography angiography (CCTA). Previous comparisons of full and reduced-dose CCTA were not conclusive, because results were compared in different groups of patients. Presented here are results in patients examined by a widely used full dose CCTA protocol and ...
OBJECTIVES The purpose of this study was to examine the association of all-cause death with the coronary computed tomographic angiography (CCTA)-defined extent and severity of coronary artery disease (CAD). BACKGROUND The prognostic value of identifying CAD by CCTA remains undefined. METHODS We examined a single-center consecutive cohort of 1,127 patients > or =45 years old with chest sympt...
Background: Current cardiovascular guidelines do not support routine screening for coronary heart disease (CHD). Despite this however screening programs utilizing coronary computed tomography angiography (CCTA) exist based on the rationale that there is potential for an effective screening program given CHD remains the largest cause of death worldwide. The aim of this study was to estimate the ...
OBJECTIVES The aim of this study was to project clinical outcomes, health care costs, and cost-effectiveness of coronary computed tomography angiography (CCTA), as compared with conventional diagnostic technologies, in the evaluation of patients with stable chest pain and suspected coronary artery disease (CAD). BACKGROUND CCTA has recently been found to be effective in the evaluation of pati...
BACKGROUND Coronary computed tomography angiography (CCTA) is an established method for ruling out coronary artery disease (CAD). Most patients referred for CCTA do not have CAD and only approximately 20-30 % of patients are subsequently referred to further testing by invasive coronary angiography (ICA) or non-invasive perfusion evaluation due to suspected obstructive CAD. In cases with severe ...
O ne million patients undergo invasive coronary angiogra-phy (CA) in the United States every year. 1 In view of its invasive nature and related costs, noninvasive imaging of coronary imaging has the theoretical appeal to improve comfort for patients, reduce cost, and refine patient selection to limit invasive procedures to patients requiring treatment for ischemic coronary artery disease (CAD)....
AIMS Left atrial appendage (LAA) device imaging after endovascular closure is important to assess for device thrombus, residual leak, positioning, surrounding structures, and pericardial effusion. Cardiac CT angiography (CCTA) is well suited to assess these non-invasively. METHODS AND RESULTS We report our consecutive series of non-valvular atrial fibrillation patients who underwent CCTA post...
BACKGROUND This study addresses the safety, feasibility, and interpretability of coronary computed tomography angiography (CCTA) in excluding significant coronary artery disease in end-stage renal disease patients on dialysis undergoing pre-renal transplant cardiac risk evaluation. METHODS Twenty nine patients (55.5 +/- 10.2 years) undergoing cardiac risk assessment prior to renal transplanta...
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