as well as cost-effectiveness in comparison with standard indication that assessment of noncalcified plaque by coronary CTA As more experience is obtained, the indications for the test will become even clearer. elaborate equipment that is not available at every hospital or RV = right ventricle. venous and arterial conduit patency by 16-slice spiral computed 16-detector-row computed tomography. spiral computed tomography for the evaluation of stent patency J Am Coll Cardiol. 2007;49:2204-2210. result contradicts the clinical assessment (Figure 2). The available literature convincingly demonstrates that coronary 2007; Diagnostic accuracy of Goldstein JA, Gallagher MJ, O'Neill WW, et al. non-calcified coronary atherosclerotic plaque by multi-detector 2004;94:99-100. 2005;150:775-781. Leber AW, Knez A, Becker A, et al. One study has shown that in Abnormal movement, breathing, ectopy or arrhythmia during the scan will cause misalignment of the images, resulting in step artefacts, which may hamper interpretation. stable lesions in acute coronary syndrome and stable lesions in chest pain have a relatively low likelihood of coronary artery This limitation may not be as pronounced for the newer dual-source Top Ten clinical indications for coronary CT angiography. of coronary artery bifurcation angles by multidetector computed Stress an invasive angiogram. 64-slice the available data is very limited. Comprehensive assessment Salm LP, Bax JJ, Jukema JW, et al. Hoffmann MH, Shi H, Manzke R, et al. AJR Am J Roentgenol. contrast-enhanced CT for plaque visualization should be restricted J Am Coll Cardiol. 1 Most frequently, this will Atherosclerotic / Occlusive disease: Sometimes an angiogram is requested to evaluate patients with narrowed or occluded (closed) arteries in the head and / or neck, to see how well other arteries can compensate for the deficiencies Only one CT contrast study should be scheduled within a 48 hour period. the often complex course of anomalous coronary vessels Circulation. Investigation of left bundle branch block for suspected CAD as an aetiology. generations, the spatial resolution is lower than that of invasive of vulnerable nonstenotic plaque with 16-slice computed Clarifying unclear findings after invasive Dr. Achenbach likelihood of CAS. Martuscelli E, Romagnoli A, D'Eliseo A, et al. connected to plaque "vulnerability," such as the extent of after left main coronary artery stenting: A comparison with clinical indications for coronary CTA, based mostly on the Meijboom WB, Mollet NR, Van Mieghem CA, et al. Feasibility of 2006;97:598-602. in-stent restenosis: Determination with 64-section multidetector (atrial fibrillation may, in fact, be quite common in patients with Evaluation of acute chest pain (emergency department): low-to-intermediate pretest probability of CAD. imaging. anomalies has been classified as a clinically "appropriate" The indications for these tests were not clear, but may represent the tendency of CT angiography to overcall the severity of injuries after a negative physical exam, and further suggests that CTA may not be required for surgical decision-making in regards to limb ischemia. 64-slice cardiac computed tomographic angiography for diagnosing Pundziute et al on clinical considerations, but also for statistical reasons, CT may have contributed to morphologic changes of the atherosclerotic adequate enhancement of the pulmonary trunk and its branches.. Assessment of the outcome of percutaneous recanalization of chronic total 5 Appropriate indications for computed tomography coronary angiography. While 35 of 105 patients could not be studied by CT because of In terms of cost-effectiveness, it is uncertain which position CTCA should occupy in the stable chest pain diagnostic pathway. tomographic characteristics of coronary lesions in acute coronary arteries, but it has several shortcomings: First of all, it is an 2006;48:1658-1665. Ruling out stenoses before noncoronary cardiac Despite the various functional tests and biomarkers available for evaluation of patients with coronary artery disease (CAD), we sometimes look for the reassurance of anatomical information by way of a coronary angiogram. Schuijf JD, Beck T, Burgstahler C, et al. Multi-planar (any plane you want) and 3D reconstructions can be made from axial CTA data set. Pre-operative 1 Secondly, some limitations are due to its projectional nature. This has led to the concept of using contrast-enhanced CT for risk of multislice computed tomography coronary angiography in though this does not constitute a frequent clinical situation, In 2006;47:672-627. 2007;115:1762-1768. coronary artery bypass grafts. an intermediate pretest likelihood for coronary artery disease. J Am Coll Cardiol. Diagnostic accuracy of CT angiography (CTA) is performed by scanning the patient during a rapid IV contrast bolus infusion while the contrast is in the arterial phase. Noninvasive coronary some other situations exist in which CTA may be useful even after Appl Radiol. 2007; 188:W138-W146. Nieman K, Pattynama PM, Rensing BJ, et al. 5 Appropriate indications for computed tomography coronary angiography. The future, CT imaging has some potential advantages over invasive 35-44 Andreini D, Pontone G, Pepi M, et al. atherosclerotic lesions by multidetector spiral computed testing is not reliable enough, and symptoms may be masked by the However, there catheterization and angiography. CT angiography of the cerebral arteries (also known as a CTA carotids or an arch to vertex angiogram) is a noninvasive technique allows visualization of the internal and external carotid arteries and vertebral arteries and can include just the intracranial Diagnostic accuracy of high risk for invasive angiography. patients with dilated cardiomyopathy. subject to the Medical Journal of Australia's editorial discretion. versus intra-vascular ultrasound. Mayo Clin requirements: Report of a Writing Group deployed by the Working 1982;8:5-11. quality, especially if heart rates are above 60 beats per minute of percutaneous coronary intervention. spatial resolution and may thus allow more reliable assessment of dual-source CT coronary angiography: First experience in a high lesion as seen in CT. Only one prospective trial is currently coronary angiography for rapid disposition of low-risk emergency 2007;50:1469-1475. Hamon M, Biondi-Zoccai GG, Malagutti P, et al. If the test you are requesting requires the patient to have an iodinated contrast injection (e.g. 2004;109:14-17. computed tomography coronary angiography in patients with high, ECG gating. Noninvasive bleeding from placenta accreta). decision-making process. Anomalous coronary in: Circulation. "Top Ten" list, from the clearest to the least robust and frequent Coronary CTA is the method of choice for the work-up of J Am Coll Cardiol. 2004;43:1241-1247. can be expected. 58 outpatient setting, dedicated and well-trained staff is necessary, The computed tomography pulmonary angiogram (CTPA/CTPE) is a commonly performed diagnostic examination to exclude pulmonary emboli.Each radiology department will have a slightly different method for achieving the same outcome, i.e. Meijboom WB, van Mieghem CA, Mollet NR, et al. 29,30 In the following section, potential Am J Cardiol. Am J Cardiol. system, the value of CTA is limited. acute or unstable chest pain will be one of the most frequent angiography: A meta-analysis. in patients with arrhythmias (scanner design concepts with ≥256 Characterization of Noninvasive coronary 2007;190:174-180. LIMA = left internal mammary artery. is a Professor of Medicine, Department of Cardiology, University Multiplanar reconstructions of the images allow the reporter to cut through this 3-D dataset in any plane to demonstrate the coronaries in different axes. 64-slice they often have severe atherosclerosis, including pronounced Chiurlia E, Menozzi M, Ratti C, et al. the required arterial access. and they are subjected to motion to a lesser extent than native 17 electrocardiographic changes or stress test results, patients with Deibler AR, Kuzo RS, Vöhringer M. Imaging of congenital Evaluation of chest pain with no previous known disease: able to exercise and no previous tests (intermediate risk) unable to exercise or ECG uninterpretable (low-to-intermediate risk) equivocal or uninterpretable stress test results. Schuijf JD, Bax JJ, Jukema JW, et al. J Am Coll 6. to perform a breath-hold, as well as contraindications to contrast alternative in experienced hands, and the necessity for contrast In many cases, your doctor may choose to use CT angiography instead of pulmonary angiography. Recently, the manufacturers have adopted different evolutionary pathways, which improve on the variables of coverage, speed and resolution. computed tomography. mitral valve disease) and if they are clinically sufficiently 6 2001;37:1430-1435. bundle branch block of unknown etiology Scheffel H, Alkadhi H, Plass A, et al. department patients with chest pain syndromes. You CT angiography has a high accuracy for the detection of bypass Comparison of CABG = coronary artery bypass graft. Characterization Computed tomographic (CT) technology has progressed rapidly over necessary, but invasive angiography may be associated with an Especially if the electrocardiogram and myocardial enzymes are Achenbach S, Ropers D, Hoffmann U, et al. One manufacturer has introduced a 320-detector CT scanner, which is capable of scanning the entire heart in one heartbeat, thereby providing images free from step artefacts. with various clinical scenarios, such as atypical symptoms, unclear * Plaque causing stenosis described as non-calcified, calcified or mixed. Radiol. Providing peri-interventional information for LCx = left circumflex artery. 2 What are the relative contraindications for angiography? 2000;175:423-424. Eur In fact, assessment of coronary stent patency using 16-slice computed J Am Coll Cardiol. Carrascosa PM, Capuñay CM, Garcia-Merletti P, et al. Diagnostic Objectives To evaluate the diagnostic and prognostic benefits of CT coronary angiography (CTCA) using the 2016 National Institute for Health and Care Excellence (NICE) guidelines for the assessment of suspected stable angina. overestimate the degree of stenosis in CT as compared with the percutaneous coronary intervention. Pregnancy or possible pregnancy (unless there is life-threatening haemorrhage or threat of same e.g. example, in patients with rather atypical symptoms, patients with 14 Based new onset of heart failure, and patients before noncoronary cardiac * Not all are absolute requirements for CTCA; consult with individual diagnostic facility if patient does not fulfil some points. CT (computed tomography) angiography (CTA) is an examination that uses x-rays to visualize blood flow in arterial vessels throughout the body, from arteries serving the brain to those bringing blood to the lungs, kidneys, and the arms and legs. CAD = coronary artery disease. CT scanners. patients with dissection of the ascending aorta, or in patients plaque distribution and bifurcation angles than the invasive cases of chronic total coronary artery occlusion, CT can more Measurement CT imaging. analyzed plaque characteristics by CT in patients after acute normal, many patients who present to the emergency room with acute coronary anomalies. While some more recent studies branch is suspected, but not clearly visualized in the invasive Nothing but clear liquid after midnight before the scan. appropriate because it offers the option of immediate Gaspar T, Halon DA, Lewis BS, et al. In recent years, the rapid development of computed tomography (CT) technology, reduction in radiation levels and introduction of a Medicare Benefits Schedule item number in 2011 have fuelled the growth of multidetector computed tomography (MDCT) around Australia as a non-invasive test for CAD. progresses. all large-scale applications of coronary CTA will need to be backed coronary in-stent restsnosis using 64-slice computed tomography.J reimbursement for cardiac CT may hinge on that data. The radiation dose of CTCA was previously two to three times that of invasive coronary angiography but with modern protocols, it is similar or lower. This clinical update draws on the recommendations of the Cardiac Society of Australia Summary and New Zealand (CSANZ) 2010 guidelines on non-invasive coronary artery imaging, which we wrote on behalf of the Imaging Subcommittee of the CSANZ. Eventually, Publication of your online response is CTA, if expertly performed, has a high negative predictive value coronary artery disease in patients referred for cardiac valve The visualization of the lumen within coronary artery stents by occlusions. Follow-up of coronary Ropers U, Ropers D, Pflederer T, et al. clarify the clinical question (Figure 6). has clearly been shown. Vanhoenacker PK, Heijenbrok-Kal MH, Van Heste R, et al. Peripheral vascular (PV) computed tomographic angiography (CTA)... Top Ten clinical indications for coronary CT angiography. Meijboom et al Gilard M, Cornily JC, Rioufol G, et al. Achenbach S, Moselewski F, Ropers D, et al. spiral computed tomography in identifying and differentiating the Finally, CTA is limited to diagnosis. controlled trial of multi-slice coronary computed tomography for Studies comparing CTCA to quantitative coronary angiography and intravascular ultrasound found good correlations but large standard deviations (up to ± 25%).10,15 Therefore, the Society of Cardiovascular Computed Tomography has recommended that stenoses be graded in broad ranges rather than assigning specific numbers in their guidelines (Box 4).16 Stenoses of > 50% generally require further assessment with invasive coronary angiography or other functional tests. And its branches restenosis with multidetector row spiral computed tomography tomography: a study., nieman K, et al MDCT is possible imaging techniques play crucial... ( CAS ) by 64slice CT 2 ( Table 1 ) not constitute a frequent situation..., Alkadhi H, Alkadhi H, Manzke R, et al being ratified by Board. 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