BACKGROUND: Anomalous right coronary arteries (RCA) arising from the left sinus of Valsalva may cause myocardial ischemia. OBJECTIVE: We evaluated morphological features of anomalous RCA by using multislice computed tomography (MSCT) in relation to myocardial ischemia provoked by myocardial perfusion single-photon emission computed tomography. METHODS: MSCT was performed in a total of 3, 212 patients by using an Aquillion 16 and a Light Speed Ultra. Retrospective ECG-gated image reconstruction was performed. Volume rendering, axial and curved multiplanar reformatted images were analyzed for the determination of the origin and course of the RCA, the take-off angle of the RCA from the aorta, and size of the RCA orifice. Furthermore, virtual angioscopic images were also used for the evaluation of the RCA orifice structure. RESULTS: Anomalous origins of the RCA were found in 15 patients. In 13 patients, the RCA arose from the left sinus of Valsalva, and in 2 patients it arose from the left main coronary artery as a single coronary artery. The RCA coursed anteriorly between the ascending aorta and pulmonary artery in 14 patients, whereas it had a retroaortic course in 1 patient. Acute angle take-off (<30 degrees ) of the RCA from the aorta and the left main coronary artery was observed in 8 patients, intramural course of the RCA within the aortic wall was observed in 6 patients and a small RCA orifice was observed in 4 patients. Exercise-induced myocardial ischemia was present in 5 patients. CONCLUSION: Coursing between the aorta and pulmonary artery, acute angle take-off and intramural course were thought to be major causes of exercise-induced ischemia in patients with anomalous origins of the RCA.
BACKGROUND: Anomalous right coronary arteries (RCA) arising from the left sinus of Valsalva may cause myocardial ischemia. OBJECTIVE: We evaluated morphological features of anomalous RCA by using multislice computed tomography (MSCT) in relation to myocardial ischemia provoked by myocardial perfusion single-photon emission computed tomography. METHODS: MSCT was performed in a total of 3, 212 patients by using an Aquillion 16 and a Light Speed Ultra. Retrospective ECG-gated image reconstruction was performed. Volume rendering, axial and curved multiplanar reformatted images were analyzed for the determination of the origin and course of the RCA, the take-off angle of the RCA from the aorta, and size of the RCA orifice. Furthermore, virtual angioscopic images were also used for the evaluation of the RCA orifice structure. RESULTS: Anomalous origins of the RCA were found in 15 patients. In 13 patients, the RCA arose from the left sinus of Valsalva, and in 2 patients it arose from the left main coronary artery as a single coronary artery. The RCA coursed anteriorly between the ascending aorta and pulmonary artery in 14 patients, whereas it had a retroaortic course in 1 patient. Acute angle take-off (<30 degrees ) of the RCA from the aorta and the left main coronary artery was observed in 8 patients, intramural course of the RCA within the aortic wall was observed in 6 patients and a small RCA orifice was observed in 4 patients. Exercise-induced myocardial ischemia was present in 5 patients. CONCLUSION: Coursing between the aorta and pulmonary artery, acute angle take-off and intramural course were thought to be major causes of exercise-induced ischemia in patients with anomalous origins of the RCA.
Authors: A M Taylor; S A Thorne; M B Rubens; P Jhooti; J Keegan; P D Gatehouse; F Wiesmann; F Grothues; J Somerville; D J Pennell Journal: Circulation Date: 2000-04-11 Impact factor: 29.690
Authors: Stefan Vogt; Daniel Koenig; Stephan Prettin; Torben Pottgiesser; Juergen Allgeier; Hans-Hermann Dickhuth; Anja Hirschmueller Journal: J Med Case Rep Date: 2008-04-23
Authors: Gitsios Gitsioudis; Evangelos Giannitsis; Waldemar Hosch; Hans U Kauczor; Hugo A Katus; Grigorios Korosoglou Journal: Case Rep Med Date: 2011-10-26
Authors: Marius Reto Bigler; Afreed Ashraf; Christian Seiler; Fabien Praz; Yasushi Ueki; Stephan Windecker; Alexander Kadner; Lorenz Räber; Christoph Gräni Journal: Front Cardiovasc Med Date: 2021-01-21