BACKGROUND AND OBJECTIVES: Although the standard management of an abdominal aortic aneurysm (AAA) is surgery, endovascular stent-graft treatment is more attractive for patients with significant co-morbid conditions. We evaluated the immediate and mid-term outcomes for the endovascular treatment of AAA. SUBJECTS AND METHODS: Between November 1996 and August 2004, 59 patients with an AAA (53 males, mean age 68.0+/-9.6 years, 3 cases with ruptured AAA) underwent an endovascular stent-graft repair at our institute. All patients were evaluated by an angiography, taken just after the completion of the procedure and at followed up with computed tomography (CT) at 1, 3, 6 and 12 months, and yearly thereafter. RESULTS: Technical success was achieved in 54 of the 59 patients (91.5%). The periprocedural mortality rate was 3.4% (2 of the 59 patients). A primary endoleak was found in 12 patients (20.3%)(type I; 9 patients, type II; 2 patients, type III; 1 patient), 2 of which required subsequent surgical conversion. Spontaneous resolution of an endoleak was seen in 4 patients (33.3%). The average follow-up period of 57 patients was 27.5 months (range from 72 days to 2581 days). In 8 patients (14.0%), a newly developed secondary endoleak was documented. A total 14 patients (23.7%) died during the follow-up period (rupture; 3, operation-related sepsis; 3, unrelated causes; 3, cardiac arrest; 1, unknown causes; 4). The cumulative survival rates at 30 days and at 1 and 2 years were found to be 93.0, and 85.7 and 76.3%, respectively, using Kaplan-Meier methods. Secondary intervention was required in 12 patients (21.8%), and surgical conversion in 4 (6.8%), with 2 (3.4%) requiring conversion to open surgery immediately after the intervention. In those with technical success, without endoleaks and graft failure, the survival rate during follow-up was higher (97.1%; rate with the exception of unrelated cause of death) than that of all the patients. CONCLUSION: The immediate and mid-term results suggest that the endovascular treatment of an AAA is technically feasible and effective. There was higher mortality and morbidity in primary and newly developed endoleak cases; therefore, proper selection of cases, according to the anatomical and clinical criteria, is essential, with meticulous regular follow-ups being critical for the optimal endovascular treatment of an AAA.
Angiography ; Aortic Aneurysm, Abdominal* ; Conversion to Open Surgery ; Endoleak ; Follow-Up Studies ; Heart Arrest ; Humans ; Male ; Mortality ; Sepsis ; Survival Rate ; Transplants ; Treatment Outcome

BACKGROUND: Nonalcoholic fatty liver disease (NAFLD) is a kind of most common hepatic disease having wide pathologic spectrum and has been increasingly recognized as an important disorder because it may progress to end stage of liver disease. In spite of several foreign reports about clinical aspects of NAFLD, there are not enough reports analyzing large group for long times in Korea. We have examined the prevalence and associatd factors for NAFLD in health screen examinees from January 1997 to June 2003. METHODS: The results of 29,781 health screen examinees were analyzed retrospectively. Prevalence of alcoholic and nonalcoholic fatty liver was computed and associating factors were analyzed statistically. RESULTS: Overall prevalence of NAFLD was 18.6% and higher in the groups of age over 50 years. NAFLD was more preponderant in male. Age, body mass index, diabetes mellitus, hypercholesterolemia, hypertriglyceridemia, and abnormal serum low density lipoprotein, high density lipoprotein, ALT level were independently associated factors with presence of NAFLD in logistic regression analysis. CONCLUSIONS: The prevalence of NAFLD and tendency of associated factors were similar to Western world. To prevent development of this common hepatic disorder which may results in end stage liver disease, prevention and control of obesity, diabetes, hyperlipidemia must be important.
Alcoholics ; Body Mass Index ; Diabetes Mellitus ; End Stage Liver Disease ; Fatty Liver* ; Humans ; Hypercholesterolemia ; Hyperlipidemias ; Hypertriglyceridemia ; Korea ; Lipoproteins ; Liver Diseases ; Logistic Models ; Male ; Obesity ; Prevalence* ; Retrospective Studies ; Western World

The fate of a grafted radial artery remains unknown. The purpose of this study was to determine whether the preoperative severity of stenosis of the target vessel influence short-term patency of radial artery (RA) grafts used as coronary artery bypass conduits. In 54 patients who had coronary artery bypass grafting (CABG) with RA grafts, RA patency was determined with multi-slice computed tomography (MSCT) 1 year after CABG. These patients were divided into three groups on the basis of the percentage of the target vessel stenosis: mild (< 60%, n=17), moderate (60% to 79%, n=19), and severe (> or = 80%, n=18). MSCT was also performed 1 week later to exclude early occlusion of RA grafts. In 3 patients, the MSCT failed to adequately discriminate the status of the RA graft due to poor image resolution. The overall incidence of RA occlusion was 23.5% (12 of 51) at 1 year in the entire population. The mild stenosis, moderate stenosis and severe stenosis group showed an occlusion rate of 50% (8 of 16), 23.5% (4 of 17) and 0% (0 of 18), respectively. The severe stenosis group had significantly lower rate of RA graft occlusion compared to the mild stenosis group (p< 0.001) and moderate stenosis group (p< 0.05). No difference in occlusion between grafts used for the different coronary artery branches could be demonstrated. Preoperative severity of the target coronary artery significantly affected the short-term RA grafts patency. Correct indication is the key factor for short-term RA patency.
Aged ; Coronary Arteriosclerosis/pathology/*radiography/*surgery ; Coronary Artery Bypass/*methods ; Coronary Vessels/pathology ; Female ; Follow-Up Studies ; Humans ; Incidence ; Male ; Middle Aged ; Postoperative Complications/epidemiology ; Radial Artery/*transplantation ; Severity of Illness Index ; Tomography, X-Ray Computed ; Vascular Patency

OBJECTIVE: We wanted to assess the feasibility and diagnostic accuracy of whole heart coronary magnetic resonance angiography (MRA) with using 3D balanced turbo-field-echo (b-TFE) with SENSE and the half-Fourier acquisition technique for identifying stenoses of the coronary artery. MATERIALS AND METHODS: Twenty-one patients who underwent both whole heart coronary MRA examinations and conventional catheter coronary angiography examinations were enrolled in the study. The whole heart coronary MRA images were acquired using a navigator gated 3D b-TFE sequence with SENSE and the half-Fourier acquisition technique to reduce the acquisition time. The imaging slab covered the whole heart (80 contiguous slices with a reconstructed slice thickness of 1.5 mm) along the transverse axis. The quality of the images was evaluated by using a 5-point scale (0 - uninterpretable, 1 - poor, 2 - fair, 3 - good, 4 - excellent). Ten coronary segments of the heart were evaluated in each case; the left main coronary artery (LM), and the proximal, middle and distal segments of the left anterior descending (LAD), the left circumflex (LCX) and the right coronary artery (RCA). The diagnostic accuracy of whole heart coronary MRA for detecting significant coronary artery stenosis was determined on the segment-by-segment basis, and it was compared with the results obtained by conventional catheter angiography, which is the gold standard. RESULTS: The mean image quality was 3.7 in the LM, 3.2 in the LAD, 2.5 in the LCX, and 3.3 in the RCA, respectively (the overall image quality was 3.0+/-0.1). 168 (84%) of the 201 segments had an acceptable image quality (> or = grade 2). The sensitivity, specificity, accuracy, negative predictive value and positive predictive value of the whole heart coronary MRA images for detecting significant stenosis were 81.3%, 92.1%, 91.1%, 97.9%, and 52.0%, respectively. The mean coronary MRA acquisition time was 9 min 22 sec (+/-125 sec). CONCLUSION: Whole heart coronary MRA is a feasible technique, and it has good potential to evaluate the major portions of the coronary arteries with an acceptable image quality within a reasonable scan time.
Reproducibility of Results ; Middle Aged ; Male ; Magnetic Resonance Angiography/*methods ; *Imaging, Three-Dimensional ; Humans ; Fourier Analysis ; Female ; Feasibility Studies ; Coronary Stenosis/*diagnosis ; Coronary Angiography ; Analysis of Variance ; Aged ; Adult

PURPOSE: The present study investigated the diagnostic accuracy and clinical implications of moderate stenosis (50–69%, Coronary Artery Disease Reporting and Data System, grade 3) on coronary computed tomography angiography (CCTA), compared with invasive coronary angiography (ICA). MATERIALS AND METHODS: Two hundred and seventy-six patients who underwent ICA due to moderate stenosis alone on CCTA were selected from our prospective registry cohort. RESULTS: Diagnostic concordance between CCTA and ICA was found in only 50 (18%) patients. Among the 396 vessels and 508 segments with moderate stenosis, diagnostic concordance was found in 132 vessels (33%) and 127 segments (25%). Segments with calcified plaque had lower diagnostic concordance than those with mixed or non-calcified plaque (22% vs. 28% vs. 27%, respectively, p=0.001). While calcified plaque burden did not have an influence on severe stenosis (≥70%) on ICA, higher burden of non-calcified plaque was correlated with a greater incidence of ICA-based severe stenosis, which was more frequent in patients with ≥3 segments of non-calcified plaque (75%) than those without non-calcified plaque (22%, p < 0.001). Typical angina and mixed or non-calcified plaque were correlated with a higher incidence of under-diagnosis, while the use of next-generation computed tomography scanners reduced the incidence of under-diagnosis. Increased body weight, left circumflex artery involvement, and calcified plaque were independent factors that increased the risk of over-diagnosis of CCTA. CONCLUSION: The diagnosis of moderate stenosis by CCTA may be limited in estimating the exact degree of ICA-based anatomical stenosis. Unlike calcific burden, non-calcific burden was positively correlated with the presence of severe stenosis on ICA.
Angina, Stable* ; Angiography* ; Arteries ; Body Weight ; Cohort Studies ; Constriction, Pathologic ; Coronary Angiography ; Coronary Artery Disease ; Coronary Stenosis* ; Diagnosis ; Humans ; Incidence ; Information Systems ; Prospective Studies

The recently developed multislice computed tomography (MSCT) is capable of rapid imaging of cardiac structures, including coronary arteries, during a single breath-hold. We evaluated coronary artery bypass graft (CABG) patency by comparing MSCT results to those of contrast angiography. MSCT and contrast angiography were performed in 39 patients (10 women, 29 men and mean age 60.0 +/- 7.8 years) with a total of 115 bypass grafts including 36 left internal mammary arteries, 4 right internal mammary arteries, 19 radial arteries, 2 gastroepiploic arteries and 54 vein grafts. Patients were investigated for an average of 14 +/- 27 months (range 1 - 108 months) after CABG surgery. Contrast angiography showed a patency rate of 87.0% (100/115). Ninety-nine of these 100 patent grafts by contrast angiography and 14 of the remaining 15 occluded grafts were correctly classified by MSCT (93.3% sensitivity and 99.0% specificity for bypass graft occlusion). The positive and negative predictive values for bypass graft occlusion were 93.3% and 99%, respectively, with an overall diagnostic accuracy of 98.3% (97.2% for left internal mammary artery, 100% for radial artery, 98.1% for vein graft and 100% for other grafts). In conclusion, MSCT is a useful and accurate diagnostic tool for the evaluation of bypass graft patency.
Aged ; Child, Preschool ; Contrast Media ; Coronary Angiography ; *Coronary Artery Bypass ; Female ; Human ; Male ; Middle Aged ; *Tomography, X-Ray Computed/methods ; *Vascular Patency

PURPOSE: To investigate the effect of pretreatment with intravenous nicorandil on the incidence of contrast-induced nephropathy (CIN) in patients with renal dysfunction undergoing coronary angiography. MATERIALS AND METHODS: This randomized controlled multicenter study enrolled a total of 166 patients (nicorandil n=81; control n=85) with an estimated glomerular filtration rate <60 mL/min. Nicorandil 12 mg dissolved in 100 mL of 0.9% saline was administered intravenously for 30 minutes just prior to coronary angiography in the nicorandil group. The same volume of only saline was given to the control group. The primary end-point was the incidence of CIN, defined as >0.5 mg/dL increase or >25% rise in serum creatinine (SCr) concentration within 48 hours of contrast exposure compared to baseline. RESULTS: The final analysis included 149 patients (nicorandil n=73; control n=76). The baseline characteristics and the total volume of the used contrast (Iodixanol, 125.6+/-69.1 mL vs. 126.9+/-74.6 mL, p=0.916) were similar between the two groups. The incidence of CIN also did not differ between the nicorandil and control groups (6.8% vs. 6.6%, p=0.794). There was no difference between the two groups in the relative change in SCr from baseline to peak level within 48 hours after coronary angiography (-1.58+/-24.07% vs. 0.96+/-17.49%, p=0.464), although the nicorandil group showed less absolute change in SCr than the control group (-0.01+/-0.43 mg/mL vs. 0.02+/-0.31 mg/mL, p=0.005). CONCLUSION: Prophylactic intravenous infusion of nicorandil did not decrease the incidence of CIN in patients with renal dysfunction undergoing coronary angiography.
Administration, Intravenous ; Aged ; Contrast Media/*adverse effects ; Coronary Angiography/*adverse effects/methods ; Creatinine/blood ; Female ; Glomerular Filtration Rate ; Humans ; Incidence ; Kidney Diseases/*chemically induced/epidemiology/physiopathology/*prevention & control ; Male ; Middle Aged ; Nicorandil/*administration & dosage/therapeutic use

BACKGROUND AND OBJECTIVES: Sirolimus-eluting stent (SES) is very effective for preventing in-stent restenosis through the suppression of neointimal proliferation. Treatment failure cases related to stent fracture have recently been reported on, but any studies concerning the pattern or mechanism of SES fracture are very rare. SUBJECTS AND METHODS: Between December 2003 to January 2005, 457 patients underwent follow-up coronary angiography after SES implantation at three referral center. We reviewed the angiographic and procedural data for eleven of theses patients [6 males (55%), mean age: 60 year-old age, range: 43-74 years] who were proven to have experience complete SES fracture. RESULTS: The left anterior descending artery (LAD) and right coronary artery (RCA) stent fracture were 7 cases (63%) and 4 cases (37%), respectively. Myocardial bridge was shown in 6 cases with LAD fracture (86%). Overlapping stent implantation was performed in 5 cases (45%). The mean value of the maximal angulations at the fracture site before intervention was 50 degrees (range; 39-70 degrees) and the mean change between the maximal and minimal angulations was 13.2 degrees (range; 2-28 degrees). The mean stent diameter and length were 3.0 mm (range; 2.75-3.50 mm) and 40 mm (range; 23-52 mm). Stent inflation with high pressure was performed on 6 cases (54%) and it's frequency was higher in the RCA than the LAD (3 cases, 75%, mean inflation pressure: 13.1 mmHg). The mean follow-up duration was 7.2 month and only 2 cases were admitted due to the recurrent chest pain. The binary restenosis rate was 55% (6 cases) and the restenotic lesions were treated by balloon angioplasty in 2 cases and additional stenting was done in 2 cases. CONCLUSION: Our results demonstrated that SES fracture occurred in 7 cases with LAD lesion and in 4 cases with RCA lesion. Long stenting including overlapping implantation and more than 40 degrees angulated long stent implantation may be the factors for SES fracture. Our results also showed high pressure stent inflation was performed more frequently at the RCA lesion, and myocardial bridge and kinking motion was detected more frequently at the LAD lesions.
Angioplasty, Balloon ; Arteries ; Chest Pain ; Coronary Angiography ; Coronary Vessels ; Follow-Up Studies ; Humans ; Inflation, Economic ; Male ; Middle Aged ; Referral and Consultation ; Sirolimus ; Stents* ; Treatment Failure

PURPOSE: To evaluate the ability of coronary computed tomographic angiography (CCTA) to predict the need of coronary revascularization in symptomatic patients with stable angina who were referred to a cardiac catheterization laboratory for coronary revascularization. MATERIALS AND METHODS: Pre-angiography CCTA findings were analyzed in 1846 consecutive symptomatic patients with stable angina, who were referred to a cardiac catheterization laboratory at six hospitals and were potential candidates for coronary revascularization between July 2011 and December 2013. The number of patients requiring revascularization was determined based on the severity of coronary stenosis as assessed by CCTA. This was compared to the actual number of revascularization procedures performed in the cardiac catheterization laboratory. RESULTS: Based on CCTA findings, coronary revascularization was indicated in 877 (48%) and not indicated in 969 (52%) patients. Of the 877 patients indicated for revascularization by CCTA, only 600 (68%) underwent the procedure, whereas 285 (29%) of the 969 patients not indicated for revascularization, as assessed by CCTA, underwent the procedure. When the coronary arteries were divided into 15 segments using the American Heart Association coronary tree model, the sensitivity, specificity, positive predictive value, and negative predictive value of CCTA for therapeutic decision making on a per-segment analysis were 42%, 96%, 40%, and 96%, respectively. CONCLUSION: CCTA-based assessment of coronary stenosis severity does not sufficiently differentiate between coronary segments requiring revascularization versus those not requiring revascularization. Conventional coronary angiography should be considered to determine the need of revascularization in symptomatic patients with stable angina.
Aged ; Angina, Stable/*diagnostic imaging ; Coronary Angiography/*methods ; Coronary Stenosis/*diagnostic imaging ; Female ; Humans ; Male ; Middle Aged ; Myocardial Revascularization ; Predictive Value of Tests ; Tomography, X-Ray Computed ; United States

Contrast-enhanced multi-detector row spiral computed tomography (MDCT) was introduced as a promising noninvasive method for vascular imaging. This study examined the accuracy of this technique for detecting significant coronary artery stenoses. Both MDCT (Sensation 16, Siemens, Germany, 12 x 0.75 mm collimation and 0.42 sec rotation speed, 120 kV, 500 effective mA, and 2.7 mm/rotation table-feed) and invasive coronary angiography (CAG) were performed on 61 patients (mean age 59.2 +/- 10, 44 men) who were suspected of having coronary artery disease. All patients were treated with atenolol (25 - 50 mg) prior to imaging and the heart rate was maintained below 65 beats per minutes during image acquisition. The images were reconstructed in the diastole around TI - 400 ms with a 0.5 mm increment and a 1.0 mm thickness. All coronary arteries with a diameter of 2.0 mm or more were assessed for the presence of a stenosis (> 50% luminal narrowing). Two independent radiologists who were unaware of the results of the invasive CAG evaluated the MDCT data, and the results were compared with those from the invasive CAG (interval 1- 27, mean 11 days). An evaluation of the CT coronary angiogram (CTCA) was possible in 58 of the 61 patients (95%). Image acquisition of the major coronary arteries including the left main trunk was available in 229 out of 244 arteries. Invasive CAG showed that 35 out of 58 patients had significant coronary artery stenoses by. patient analysis of those who could be evaluated showed that CT coronary angiography correctly classified 30 out of 35 patients as having at least 1 coronary stenosis (sensitivity 85.7%, specificity 91.3%, positive predictive value 93.8%, negative predictive value 80.8%). By analyzing each coronary artery, CAG found 62 stenotic coronary arteries in the 229 coronary arteries that could be evaluated. MDCT correctly detected 50 out of 62 stenotic coronary arteries and an absence of stenosis was correctly identified in 156 out of 167 normal coronary arteries (sensitivity 80.6%, specificity 93.4%, positive predictive value 81.9%, negative predictive value 92.8%). The non-invasive technique of MDCT for examining the coronary artery appears to be a useful method for detecting coronary artery stenoses with a high accuracy particularly with the proximal portion and large arteries.
Aged ; Coronary Stenosis/*radiography ; Female ; Humans ; Male ; Middle Aged ; Predictive Value of Tests ; Reproducibility of Results ; Sensitivity and Specificity ; *Tomography, Spiral Computed/standards