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    Evaluation of atherosclerotic plaque, coronary stent and coronary by-pass grafts with 128-slice CT and technical optimization: Our single center experiences
    (2012) Kayan, Mustafa; Çetin, Meltem; Türker, Yasin; Yılmaz, Ömer; Munduz, Mehmet; Yaşar, Selçuk; Duymuş, Mahmut
    The purpose of this study was to evaluate the native coronary artery (CA), coronary atherosclerotic plaque, coronary by-pass grafts and coronary stents with 128-slice CT, comparison of findings with literature and technical optimization. In one hundred fifty patients who had undergone coronary computerized tomography angiography using 128-slice CT (CCTA), CAs were examined in terms of visibility, atherosclerotic plaque characteristics, by-pass graft and stent patency. In each case, CAs were divided into fifteen segments according to the American Heart Association (AHA) classification and then evaluated. Out of one hundred and fifty (150) cases, 2250 CA segments were examined according to AHA classification. A total of 1045 segments below 2 mm were examined for visibility. Fifty segments could not be visualized. Soft plaques were observed in 97 cases (4 cases with calcium load = 0). Atherosclerotic plaques were observed in 450 segments. By-pass grafts were observed in ten cases while 28 stents were observed in fifteen cases. In cases with by-pass graft, artifacts due to clips did not hinder the examination. In conjunction with technological advances, CAs can be non-invasively examined using new generation multi-dimensional computerized tomography. Clips artifacts in coronary stents and by-pass grafts do not hinder CA examination due to high spatial and temporal resolution of MDCT devices.
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    Evaluation of coronary artery anomalies using 128-Slice computed tomography
    (Baycinar Medical Publ-Baycinar Tibbi Yayincilik, 2012) Kayan, Mustafa; Yavuz, Turhan; Munduz, Mehmet; Türker, Yasin; Yeşildağ, Ahmet; Etli, Mustafa; Yaşar, Selçuk
    Background: In this study, we aimed to investigate the efficacy of a 128-slice computed tomography (CT) device in detecting anatomical variations and anomalies of coronary arteries and to compare the results obtained with literature data. Methods: Totally, 83 patients (58 males, 25 females; mean age 53.7 +/- 10 years; range 31 to 80 years) with suspected or known coronary artery disease who underwent evaluation using the 128-slice CT in our clinic between February 2009 and December 2010 were retrospectively analyzed. All images were evaluated in terms of anatomic variation and anomaly by a radiologist with expertise in cardiovascular radiology. Continuous variables were expressed as arithmetical mean +/- standard deviation (SD), while categorical variables were expressed as percent (%). Statistical analysis was performed using descriptive statistical tests. Results: The rate of right dominance, left dominance and co-dominance was 80.7%, 8.4% and 10.8%, respectively. It was observed that the conus artery originated from the right sinus valsalva at a rate of 16.86% and from the right coronary artery (RCA) at a rate of 83.1%. It was found that sinus node artery (SNA) originated from the RCA at a rate of 77.1%, from the circumflex (Cx) artery at a rate of 18.1%, from the left main coronary artery (LMCA) at a rate of 2.4% and from the right sinus valsalva at a rate of 2.4%. Ramus intermedius was present in 30.12% of the patients. Coronary artery anomaly was observed in 48 patients (57.8%). of them, 1.2% had absence of LMCA, 6% had commissural origin, 1.2% had coronary hypoplasia, 4.8% had anomalous of contralateral sinus origin, and 43.3% had myocardial bridging. Conclusion: The 128-slice CT device is a non-invasive method which provides reliable, detailed and correct information for detecting variations and anomalies of coronary arteries. We believe that the 128-slice CT is of higher value in diagnosis and surgical therapy of coronary artery anomalies.
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