Coronary arteries

Wielopolski, Piotr A.; Geuns, Robert Jan M. van; Feyter, Pim J. de; Oudkerk, Matthijs

doi:10.1007/s003300050004

Cited by 48 publications

(25 citation statements)

References 88 publications

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“…Enormous advances have occurred in the field of MR coronary angiography in recent years, and the potential role of MR imaging to identify the anatomy of coronary vessels has been clearly shown by several studies [2,8]. In fact, MR coronary angiography has been reported to be clinically relevant in determining the origin and course of anomalous coronary arteries [19][20][21] for the follow-up of coronary artery bypass graft patencies [7,22] and in donor-recipient anastomoses for heart transplantation [23,24].…”

Section: Discussionmentioning

confidence: 99%

“…Catheter angiography, currently the gold standard in detecting atheromatous coronary artery disease, is invasive and potentially harmful and necessitates the use of iodinated contrast material and radiation. Therefore, several techniques are under research to depict atheromatous changes in the coronary arteries in a noninvasive or less invasive fashion [1,2]. This technique could be used to screen or select patients for coronary catherization, which would significantly reduce the number of unnecessary diagnostic catherizations and would thus be potentially cost-effective.…”

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confidence: 99%

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Improved Visualization of Coronary Arteries Using a New Three-Dimensional Submillimeter MR Coronary Angiography Sequence with Balanced Gradients

Giorgi

Dymarkowski

Maes

et al. 2002

American Journal of Roentgenology

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OBJECTIVE. The goal of our study was to evaluate a new three-dimensional real-time navigator MR coronary angiography sequence to noninvasively visualize the coronary arteries.SUBJECTS AND METHODS. Fifteen healthy volunteers underwent MR coronary angiography with a new balanced turbo field-echo sequence in comparison with the standard turbo field-echo sequence. Signal-to-noise, blood-to-myocardium, blood-to-fat, and blood-topericardial fluid contrast ratios of the left and right coronary artery systems were measured. Image quality was graded, the length and diameter of the coronary arteries were measured, and the number of visible side branches was assessed.RESULTS. The balanced turbo field-echo images yielded a higher blood-to-myocardium and blood-to-pericardial fluid contrast ratio, a similar blood-to-fat contrast ratio, and a lower signal-to-noise ratio than the turbo field-echo images. On a 5-point grading scale (1, nondiagnostic or unreadable; 2, poor; 3, moderate; 4, good; 5, excellent), image quality was rated significantly better for the balanced turbo field-echo sequence than for the turbo field-echo sequence (left coronary artery, 4.0 ± 0.6 vs 3.6 ± 0.5 [ p = 0.015]; right coronary artery, 4.4 ± 0.4 vs 3.6 ± 0.4 [ p < 0.0001], respectively), resulting in a significantly longer segment of the three major coronary arteries visualized (left anterior descending coronary artery, 92 ± 21 mm vs 79 ± 24 mm; left circumflex coronary artery, 70 ± 7 mm vs 60 ± 18 mm; right coronary artery, 112 ± 28 mm vs 95 ± 27 mm) and a significantly higher number of side branches visualized (left anterior descending coronary artery, 2.9 ± 1.3 vs 1.5 ± 1.3; left circumflex coronary artery, 2.1 ± 1.7 vs 1.0 ± 1.2; right coronary artery, 3.7 ± 1.7 vs 2.6 ± 1.5). Mean imaging time per coronary artery was significantly shorter for the balanced turbo field-echo sequence (5.7 ± 1.0 min) than for the turbo field-echo sequence (8.4 ± 1.4 min) ( p < 0.0001).CONCLUSION. Compared with standard turbo field-echo MR coronary angiography, optimized balanced turbo field-echo MR coronary angiography improves the visualization of the coronary arteries and their side branches within a significantly shorter imaging time.oronary artery disease remains one of the leading causes of morbidity and mortality in the industrialized countries. Catheter angiography, currently the gold standard in detecting atheromatous coronary artery disease, is invasive and potentially harmful and necessitates the use of iodinated contrast material and radiation. Therefore, several techniques are under research to depict atheromatous changes in the coronary arteries in a noninvasive or less invasive fashion [1,2]. This technique could be used to screen or select patients for coronary catherization, which would significantly reduce the number of unnecessary diagnostic catherizations and would thus be potentially cost-effective. Three-dimensional (3D) MR coronary angiography techniques, performed either in breath-hold [3][4][5] or during free-breathing using a navigator [6,7...

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Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

Improved Visualization of Coronary Arteries Using a New Three-Dimensional Submillimeter MR Coronary Angiography Sequence with Balanced Gradients

Giorgi

Dymarkowski

Maes

et al. 2002

American Journal of Roentgenology

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“…Several groups of researchers have highlighted the potential value of MR imaging for revealing the coronary arteries noninvasively [1,2]. Although detection of coronary artery stenoses with MR coronary angiography in a clinical setting is still premature [3], assessment of anomalous coronary arteries is considered a solid indication for MR coronary angiography [4,5].…”

Section: Discussionmentioning

confidence: 99%

Single Coronary Artery as Cause of Acute Myocardial Infarction in a 12-Year-Old Girl: A Comprehensive Approach with MR Imaging

Giorgi

Dymarkowski²,

Rademakers³

et al. 2002

American Journal of Roentgenology

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1535nomalies of the coronary arteries are rare conditions that are often asymptomatic. However, if perfusion by the coronary artery is impaired, this anomaly can lead to a life-threatening situation, such as myocardial ischemia or infarction, and sudden cardiac death. In symptomatic patients, diagnosis is made by depicting the congenital coronary artery anomaly and by assessing the impact of ischemia on myocardial integrity and function. Of all cardiac imaging techniques, MR imaging is the sole technique to provide adequate information for this assessment. Case ReportA 12-year-old girl presented with a history of three syncopal episodes that occurred during physical exercise. During the third attack, she experienced chest pain, for which she was admitted to a nearby hospital. Routine ECG showed ST-segment abnormalities suggestive of myocardial ischemia and positive cardiac enzymes (i.e., values for total creatine kinase, 1800 IU; creatine kinase myocardial fraction, 240 IU; and troponin T, 2.5 µ g/L) that confirmed myocardial necrosis. Transthoracic echocardiography showed a hypokinetic motion pattern of the left anterior wall. No congenital abnormalities were shown. All other biochemical and serologic tests revealed no abnormalities. Follow-up echocardiography 1 week later showed a recovery of contractility. The presumptive diagnosis was viral myocarditis with myocardial necrosis. To exclude structural cardiac abnormalities and to evaluate the extent of myocardial damage and the repercussion on ventricular function, we referred the patient to our hospital for MR imaging.MR imaging was performed on a 1.5-T Gyroscan Intera CV system (Philips, Best, The Netherlands) equipped with a five-element cardiac synergy coil and Vectorcardiogram triggering. Morphologic MR imaging of the heart using a breath-hold fast-spin-echo technique did not reveal any abnormalities. MR coronary angiography, using a commercially available, three-dimensional turbo field-echo technique with real-time navigator correction, was performed along the course of the right coronary artery and the left main and left anterior descending coronary arteries (Figs. 1A and 1B) [1]. These curved maximum-intensity-projection images, using a Soapbubble analysis tool (Philips Medical Systems), showed a normal origin and course of the right, left circumflex, and left anterior descending coronary arteries. However, the left main coronary artery did not originate from the left sinus of Valsalva. Instead, the proximal portion of the left coronary artery tree could be followed between the aortic root and the main pulmonary artery to the right atrioventricular groove, where it originated from the right coronary artery.Assessment of ventricular function, using breath-hold balanced fast-field-echo cine MR imaging in the cardiac short axis and vertical and horizontal long axes, showed a preserved end-diastolic wall thickness, a normal regional myocardial contractility pattern, and a normal global left ventricular function. MR perfusion imaging (0.05 mmol/kg of body ...

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“…Post preparing of the 3D images is performed in a way like that for coronary CTA to gather such huge volumetric information sets, spatial resolution is fairly lower (typically >1 mm in-plane and through-plane resolution), information is gathered over roughly 100 ms of each heart cycle (with potential for obscuring), and scan times are extensive (10 to 15 minutes), in this manner ordering the utilization of navigator echoes. By and by, the entire heart coronary MRA approach has increased quick acknowledgment on the premise of promising beginning results [31,32].…”

Section: Whole Heart Coronary Mramentioning

confidence: 99%

Comparison of Diagnostic Performance of Multi Detector CT Angiography with Conventional Coronary Angiography for Assessment of Coronary Artery Disease

Bayar¹,

Feng²

2017

J Pain Relief

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Aim: The point of this study was to reflectively assess the analytic exactness of multi detector angiography as a different option for conventional coronary angiography in evaluating coronary artery disease. Materials and Methods:This review study selected 57 patients, who experienced both conventional coronary angiography (CCA), and additionally multi-detector computed coronary angiography (MDCT). Aggregate of 931 open segments were studied. Of which 95 portions indicated shifted level of stenosis, with 34 segments <50% stenosis, 43 segments 50-70% stenosis and 18 segments >70% stenosis. Results:The affectability and specificity of 64 slice MDCT for identifying stenosis in <50%, 50-70% and >70% are 78.57% and 99.34%; 81.08% and 99.33%; 87.5% and 99.78%. The positive predictive value (PPV) and negative predictive value (NPV) are 78.57% and 99.34%; 83.33% and 99.22%; 87.5% and 99.78% individually. Over all exact nesses are 88.95%, 90.2% and 93.64% separately. There was no critical contrast in analytic exactness between conventional coronary angiography and 64 slice computed tomography in moderate (50-70%) and additionally severe (>70%) stenosis (p>0.05). Be that as it may, critical contrast was found in gentle (<50%) stenosis (p<0.05). Conclusion:Indicative exactness of multi detector coronary angiography (MDCT) was found to be higher in moderate and extreme stenosis and can be utilized as a substitute to conventional coronary angiography (CCA).

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Coronary arteries

Cited by 48 publications

References 88 publications

Improved Visualization of Coronary Arteries Using a New Three-Dimensional Submillimeter MR Coronary Angiography Sequence with Balanced Gradients

Improved Visualization of Coronary Arteries Using a New Three-Dimensional Submillimeter MR Coronary Angiography Sequence with Balanced Gradients

Single Coronary Artery as Cause of Acute Myocardial Infarction in a 12-Year-Old Girl: A Comprehensive Approach with MR Imaging

Comparison of Diagnostic Performance of Multi Detector CT Angiography with Conventional Coronary Angiography for Assessment of Coronary Artery Disease

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