1/27. Effect of CABG on coronary flow reserve in atresia of the left coronary ostium.We evaluated the change of coronary flow reserve using a Doppler guidewire before and after coronary artery bypass grafting to assess the coronary hemodynamic effect of surgical revascularization in a 13-year-old boy with congenital atresia of the left coronary ostium, which is one of the rarest of the congenital coronary anomalies. Coronary flow reserve in the right coronary artery and left anterior descending artery increased significantly after coronary revascularization, and a microvascular bed developed in the left anterior descending artery.- - - - - - - - - - ranking = 1keywords = reserve (Clic here for more details about this article) |
2/27. A most peculiar coronary circulation in a patient with pulmonary atresia and intact ventricular septum.A patient with pulmonary atresia and intact ventricular septum was found to have a right ventricular-dependent coronary circulation. In this infant both coronary arteries lacked their normal proximal connection with the aorta, perhaps the most egregious form of this prejudicial coronary circulation. Even more interesting was a direct collateral vessel originating from the descending thoracic aorta and connecting with the coronary circulation. This patient has undergone bilateral modified Blalock-Taussig shunts, and left ventricular function seems preserved.- - - - - - - - - - ranking = 0.16666666666667keywords = reserve (Clic here for more details about this article) |
3/27. Normalisation of abnormal coronary fractional flow reserve associated with myocardial bridging using an intracoronary stent.Although intracoronary stenting procedures have been advocated for the successful treatment of myocardial ischaemia associated with myocardial bridging, the physiological rationale for this approach remains unexplored. The case of a 70 year old man with symptoms of cardiac ischaemia associated with a left anterior descending coronary artery bridge is described, where use of an intracoronary stent abolished the angiographic abnormalities and also restituted pronounced abnormalities of coronary fractional flow reserve.- - - - - - - - - - ranking = 0.83333333333333keywords = reserve (Clic here for more details about this article) |
4/27. Woven coronary artery: differential diagnosis with diffuse intracoronary thrombosis.Woven coronary malformation is characterized by the branching of a major epicardial coronary artery into thin channels which then merge again in a normal conduit. The angiogram can suggest a filling defect instead of a malformation and an undue coronary angioplasty could be performed determining some damage to the arterial wall. In this case report we describe a patient with a stenosis on the left anterior descending coronary artery and a woven coronary artery on the right coronary artery. In 1995 a coronary angioplasty was performed on the left anterior descending coronary artery. Four years later a coronary angiogram did not show any changes in the right coronary artery. In this patient the malformation did not induce any reduction in the coronary reserve as shown at cardiac scintigraphy. We need more information about the natural history of such a malformation.- - - - - - - - - - ranking = 0.16666666666667keywords = reserve (Clic here for more details about this article) |
5/27. 3D MR imaging of coronary arteriovenous fistulas.Coronary arteriovenous fistula are uncommon if not rare, but represent the most prevalent hemodynamically significant congenital malformations of the coronary arterial circulation. The goal of this report is to evaluate the use of 3D volume rendering from transaxial breathhold coronary MR angiograms to visualize coronary arteriovenous fistulas. Coronary MR angiography offers a new non-invasive technique that accurately defines the anatomy of these malformations, setting the stage for surgical intervention.- - - - - - - - - - ranking = 0.00054390187818139keywords = volume (Clic here for more details about this article) |
6/27. Abnormal coronary flow reserve in a 13-year-old girl with an absent left circumflex coronary artery.We measured the coronary flow reserve in a 13-year-old girl with the rare anomaly of an absent left circumflex coronary artery. Although the coronary flow volume of the right coronary artery was at the same level as that of the left anterior descending coronary artery, the coronary flow reserve of the patient's right coronary artery was depressed without stenotic lesion, and it was less than the level of -2 standard deviation (SD) of the right coronary artery preponderance cases.- - - - - - - - - - ranking = 1.0005439018782keywords = reserve, volume (Clic here for more details about this article) |
7/27. Single left coronary artery with origin of the right coronary artery from distal circumflex.We report two very unusual cases of agenesis of the right coronary ostium with continuation of the left circumflex artery as the right coronary artery. The recognition of the anomaly in the first case lead to a better understanding of this finding in the second case, which translated into shorter procedure time, less contrast volume, and fewer catheter manipulations.- - - - - - - - - - ranking = 0.00054390187818139keywords = volume (Clic here for more details about this article) |
8/27. Utility of three-dimensional volume rendering images using electron-beam computed tomography to evaluate possible causes of ischemia from an anomalous origin of the right coronary artery from the left sinus of valsalva.The present study evaluated the usefulness of 3-dimensional volume rendering (VR) images using electron-beam computed tomography (EBCT) in determining the possible causes of ischemia resulting from the anomalous origin of the right coronary artery (RCA) from the left sinus of valsalva, which coursed between the ascending aorta and pulmonary trunk. Such anomalies could cause ischemia or sudden death without obstructive coronary artery disease. The suggested mechanism is either compression causing closure of the slit-like orifice of the anomalous artery as the aorta dilates with exertion or compression of the anomalous artery by the aorta and pulmonary trunk as it courses between these 2 arteries, which dilate with exercise. A 17-year-old male underwent EBCT coupled with a 100-ml intravenous injection of iodinated contrast medium. Data were reconstructed into 3-dimensional images through VR to evaluate the shape of the orifice and the spatial relationship of the RCA, ascending aorta and pulmonary trunk. Perspective VR showed the shape of the orifice of the left main trunk, which was not slit-like, and cut-plane VR showed the spatial relationship of both the lumen and the surface of the RCA, ascending aorta and pulmonary trunk, providing information on whether the ascending aorta or pulmonary trunk would compress the RCA and cause ischemia.- - - - - - - - - - ranking = 0.002719509390907keywords = volume (Clic here for more details about this article) |
9/27. communication between left main stem trunk and proximal segment of left anterior descending coronary artery rescues left ventricular ejection fraction of a patient with three-vessel disease.The well-known congenital anomalies of the left main stem refer mainly to its anomalous origin from the pulmonary artery or the right aortic sinus. We present a patient with a large communication between the left main stem trunk and the proximal segment of the left anterior descending coronary artery which preserves the left ventricular systolic performance in the setting of significant three-vessel disease.- - - - - - - - - - ranking = 0.16666666666667keywords = reserve (Clic here for more details about this article) |
10/27. ALCAPA in an adult with preserved left ventricular function.Anomalous origin of the left coronary artery from the pulmonary artery (ALCAPA) is the most common congenital coronary artery defect. Left uncorrected, nearly 90% of patients will die within one year. Without surgical repair, surviving patients are subjected to risks of myocardial ischemia with global cardiomyopathy, chronic mitral regurgitation, and sudden death. We report a case of ALCAPA in a 23-year-old female with completely preserved left ventricular function. This article reviews the mechanism of this unusual presentation as well as the therapeutic options for adults presenting with ALCAPA.- - - - - - - - - - ranking = 0.83333333333333keywords = reserve (Clic here for more details about this article) |
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