Journal of cardiovascular computed tomography
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J Cardiovasc Comput Tomogr · May 2017
Multicenter StudyPredictive value of perfusion defects on dual energy CTA in the absence of thromboembolic clots.
To determine the predictive value of volumetrically measured lung perfusion defects (PDvol) and right ventricular dysfunction on dual-energy computed tomography angiography (DE-CTA) for predicting all cause mortality in patients suspected of pulmonary embolism (PE) but without evident thromboembolic clot on CTA. ⋯ In the absence of thromboembolic clots, PDvol at DE-CTA appears to be predictive for all cause mortality.
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J Cardiovasc Comput Tomogr · Jan 2017
Multicenter Study Observational StudyRationale and design of the coronary artery calcium consortium: A multicenter cohort study.
Although coronary artery calcium (CAC) has been investigated for over two decades, there is very limited data on the association of CAC with cause of death. The CAC Consortium is a large ongoing multi-center observational cohort of individuals who underwent non-contrast cardiac-gated CAC testing and systematic, prospective, long-term follow-up for mortality with ascertainment of cause of death. ⋯ The CAC Consortium is large and highly generalizable data set that is uniquely positioned to expand the understanding of CAC as a predictor of mortality risk across the spectrum of disease states, allowing innovative modeling of the competing risks of cardiovascular and non-cardiovascular death.
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J Cardiovasc Comput Tomogr · Nov 2015
Multicenter Study Comparative Study Observational StudySafety and efficiency of outpatient versus emergency department-based coronary CT angiography for evaluation of patients with potential ischemic chest pain.
While coronary CT angiography (coronary CTA) may be comparable to standard care in diagnosing acute coronary syndrome (ACS) in emergency department (ED) chest pain patients, it has traditionally been obtained prior to ED discharge and a strategy of delayed outpatient coronary CTA following an ED visit has not been evaluated. ⋯ In ED chest pain patients with a low risk of ACS, performing coronary CTA as an outpatient may be a safe strategy.
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J Cardiovasc Comput Tomogr · Nov 2015
Randomized Controlled Trial Multicenter StudyComputed tomography-based high-risk coronary plaque score to predict acute coronary syndrome among patients with acute chest pain - Results from the ROMICAT II trial.
Coronary computed tomography angiography (CTA) can be used to detect and quantitatively assess high-risk plaque features. ⋯ The ROMICAT score derived from semi-automated quantitative measurements of high-risk plaque features was an independent predictor of ACS during the index hospitalization and was incremental to gender and presence of ≥ 50% stenosis.
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J Cardiovasc Comput Tomogr · Jul 2015
Randomized Controlled Trial Multicenter StudyImage quality and radiation dose of a prospectively electrocardiography-triggered high-pitch data acquisition strategy for coronary CT angiography: The multicenter, randomized PROTECTION IV study.
Concerns have been raised about radiation dose of coronary CT angiography. Although high-pitch acquisition technique yields high potential for radiation dose savings, it is more vulnerable to artifacts, which impair diagnostic image quality. ⋯ In patients with a low and stable heart rate diagnostic image quality can be maintained with a high-pitch helical scan first strategy while 58% of radiation dose can be saved.