• 대한흉부심장혈관외과학회:학술대회논문집
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• 대한흉부외과학회 1996년도 제 28차 추계학술대회 및 총회 대한흉부외과학회
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• pp.63-63
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• 1996

• Journal of Chest Surgery
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• 제50권5호
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• pp.355-362
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• 2017

Background: Off-pump coronary artery bypass grafting (OPCABG) procedures can avoid the complications of an on-pump bypass. However, some cases unexpectedly require conversion to cardiopulmonary bypass during OPCABG. The risk factors associated with a sudden need for cardiopulmonary bypass were analyzed. Methods: This retrospective study included 283 subjects scheduled for OPCABG from 2001 to 2010. These were divided into an OPCABG group and an on-pump conversion group. Preoperative, operative, and postoperative variables were compared between the 2 groups. Results: Of the 283 patients scheduled for OPCABG, 47 (16%) were switched to on-pump coronary artery bypass grafting (CABG). The mortality of the both the OPCABG and on-pump conversion groups was not significantly different. The major risk factors for conversion to on-pump CABG were congestive heart failure (CHF) (odds ratio [OR], 3.5; p=0.029), ejection fraction (EF) <35% (OR, 4.4; p=0.012), and preoperative beta-blocker (BB) administration (OR, 0.3; p=0.007). The use of intraoperative (p=0.007) and postoperative (p=0.021) inotropics was significantly higher in the conversion group. The amount of postoperative drainage (p<0.001) and transfusion (p<0.001) also was significantly higher in the conversion group. There were no significant differences in stroke or cardiovascular complications between the groups over the course of short-term and long-term follow-up. Conclusion: Patients who undergo OPCABG and have CHF or a lower EF (<35%) are more likely to undergo on-pump conversion, while preoperative BB administration could help prevent conversions from OPCABG to on-pump CABG.

• 보건행정학회지
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• 제16권3호
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• pp.37-51
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• 2006

This study evaluates the reliability of the discharge status variable m health insurance claims for identifying in-hospital patient deaths. This study used 2002 national health insurance claims and the cause of death statistics from Korean national statistical office. The Study data set included acute myocardial infarction (AMI) and coronary artery bypass graft (CABG) surgery patients in 133 general and tertiary hospitals. The gold standard containing patient death information was made and then compared with that of claims data. The hospitals were classified into four groups based on the number of deaths in each hospital. Simple kappa coefficients were calculated to evaluate the agreements of patient deaths between the gold standard and the insurance claims. CABG (83.9%) showed higher agreements than AMI(73.0%) in matched in-hospital patient death information between data sets. Simple kappa coefficients of CABG (0.63) and AMI (0.59) showed moderate or good agreements. The agreements, however, varied depending on the disease or hospital types. The fact that the agreements are only moderate to good indicates that the accuracy of in-hospital death information in claims is not high. n the variable is used to identify patient deaths, it may mislead people. Therefore, efforts should be made to improve the reliability of the discharge status variable in health insurance claims.

• 대한의생명과학회지
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• 제17권4호
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• pp.329-336
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• 2011

The female has previously been shown to be an independent risk factor for mortality and morbidity after coronary artery bypass grafting surgery (CABG). The aim of this retrospective study is to evaluate gender differences of the perioperative outcomes in elderly patients underwent CABG. Data for seventy elderly patients (>70 years) that underwent CABG (between January 2005 and July 2011) were divided into two groups: male patients (n=33, male group) and female patients group (n=37, female group). Heights, body weights, body surface area and coronary artery obstruction rate (right coronary artery territory) in the female group were lower than those of the male group ($P$ <0.05). History of hypertension, hyperlipidemia, congestive heart failure and percutaneous coronary artery intervention in the female group was higher than that of the male group ($P$ <0.05). Total cholesterol and brain natriuretic peptide levels in the female group were higher than those of the male group ($P$ <0.05). Platelet count in the female group was higher than the male group at preoperative (Pre-OP) period ($P$ <0.05). Erythrocyte count, hematocrit and hemoglobin levels in the female group were lower than those of the male group at Pre-OP period ($P$ <0.05). But, erythrocyte count, hematocrit and hemoglobin levels in the female group were higher than those of the Male group at postoperative (Post-OP) period ($P$ <0.05). Left ventricular ejection fraction in the female group was higher than the male group at Post-OP period ($P$ <0.05). Hospital stay length in the female group was higher than the male group ($P$ <0.05). Post-OP bleeding volume and incidence of ventricular premature contraction in the female group were lower than those of the male group ($P$ <0.05). These results suggest that despite female gender have a greater risk factors and require a longer hospitalization than male, there was no significant difference incidence of mortality and complication.

• 한국의료질향상학회지
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• 제7권2호
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• pp.218-228
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• 2000

Background : Among 'structure', 'process' and 'outcome' approaches, outcome evaluation is considered as the most direct and best approach to assess the quality of health care providers. Risk-adjustment is an essential method to compare outcome across providers. This study has aims to judge performance of hospitals by severity adjusted mortality rates of coronary artery bypass graft (CABG) surgery. Methods : Medical records of 584 patients who got the CABG surgery in 6 general hospitals during 1996 and 1997 were reviewed by trained nurses. The MedisGroups was used to quantify severity of patients. The predictive probability of death was calculated for each patient in the sample from a multivariate logistic regression model including the severity score, age and sex. For evaluation of hospital performance, we calculated ratio of observed number to expected number of deaths and z score [(observed number of deaths - expected number of deaths)/square root of the variance in the number of deaths], and compared observed mortality rate with confidence interval of adjusted mortality rate for each hospital. Results : The overall in-hospital mortality was 7.0%, ranged from 2.7% to 15.7% by hospital. After severity adjustment the mortality by hospital was from 2.7% to 10.7%. One hospital with poor performance was distinctly divided from others with good performance. Conclusion : In conclusion, severity-adjusted mortality rate of CABG surgery might be applied as an indicator for hospital performance evaluation in Korea. But more pilot studies and improvement of methodologies has to be done to use it as quality indicator.

• Journal of Chest Surgery
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• 제44권2호
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• pp.131-136
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• 2011

Background: We evaluated the surgical results and predictors of long-term survival in patients who underwent coronary artery bypass grafting (CABG) at the time of an aortic valve replacement (AVR) due to aortic stenosis. Materials and Methods: Between January 1990 and December 2009, 183 consecutive patients underwent CABG and concomitant aortic valve replacement for aortic stenosis. The mean follow-up period was $59.8{\pm}3.3$ months and follow-up was possible in 98.3% of cases. Predictors of mortality were determined by Cox regression analysis. Results: There were 5 (2.7%) in-hospital deaths. Follow-up of the in-hospital survivors documented late survival rates of 91.5%, 74.8%, and 59.6% at 1, 5, and 10 postoperative years, respectively. Age (p<0.001), a glomerular filtration rate (GFR) less than 60 mL/min (p=0.006), and left ventricular (LV) mass (p<0.001) were significant predictors of mortality in the multivariate analysis. Conclusion: The surgical results and long-term survival of aortic valve replacement with concomitant CABG in patients with aortic stenosis and coronary artery disease were acceptable. Age, a GFR less than 60 mL/min, and LV mass were significant predictors of mortality.

• Journal of Preventive Medicine and Public Health
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• 제34권1호
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• pp.21-27
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• 2001

Objectives : To develop a model that will predict the mortality of patients undergoing Coronary Artery Bypass Graft (CABG) and evaluate the perfermance of hospitals. Methods : Data from 564 CABGs peformed in six general hospitals were collected through medical record abstraction by registered nurses. Variables studied involved risk factors determined by severity measures. Risk modeling was performed through logistic repression and validated with cross-validation. The statistical performance of the developed model was evaluated using c-statistic, $R^2$, and Hosmer-Lemeshow statistic. Hospital performance was assessed by severity-adjusted mortalities. Results : The developed model included age, sex, BUN, EKG rhythm, Congestive Heart Failure at admission. acute mental change within 24 hours, and previous angina pectoris history. The c-statistic and $R^2$ were 0.791 and 0.001, respectively. Hosmer-Lemeshow statistic was 10.3(p value=0.2415). One hospital had a significantly higher mortality rate than the average mortality rate, while others were net significantly different. Conclusion : Comparing the quality of service by severity adjusted mortality rates, there were significant differences in hospital performance. The severity adjusted mortality rate of CABG surgery may He an indicator for evaluating hospital performance in Korea.

• Journal of Chest Surgery
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• 제56권5호
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• pp.313-321
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• 2023

Background: This study evaluated the early, 1-year, and 3-year graft patency rates and mid-term clinical outcomes after no-touch saphenous veins (NT-SVs) were used as aortocoronary grafts in coronary artery bypass grafting (CABG). Methods: In total, 101 patients who underwent CABG using NT-SVs as aortocoronary grafts were included. The 2 most common indications for performing aortocoronary grafting with NT-SVs were unavailability of the left internal thoracic artery (n=36) and moderate lesions where flow competition was expected (n=27). Early (median, 1 day; interquartile range [IQR], 1-2 days), 1-year (median, 13 months; IQR, 11-16 months), and 3-year (median, 34 months; IQR, 27-41 months) graft angiography was performed in 98 (97.0%), 84 (83.2%), and 40 patients (39.6%), respectively. The median follow-up duration was 43 months (IQR, 13-76 months). Overall survival rates and the cumulative incidence of major adverse cardiac events were evaluated. Results: The operative mortality rate was 2% (2 of 101 patients). Early postoperative patency rates for overall and aortocoronary NT-SV grafts were 98.2% (223 of 227 distal anastomoses) and 98.2% (164 of 167), respectively. The 1- and 3-year patency rates for aortocoronary SV grafts were 94.9% (131 of 138) and 90.6% (58 of 64), respectively. The overall survival rates at 5 and 10 years were 81.7% and 59%, respectively. The cumulative incidence of major adverse cardiac events at 5 and 10 postoperative years was 20.7% and 39%, respectively. Conclusion: The feasibility of using NT-SVs as aortocoronary grafts in CABG was shown in this study, based on the graft patency rates up to 3 years and the mid-term clinical outcomes.

• Journal of Chest Surgery
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• 제36권10호
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• pp.741-747
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• 2003

배경: 관상동맥 우회술은 가장 안전하게 시행할 수 있는 심장수술로 자리를 잡아왔다. 하지만 심한 관상동맥 질환으로 인한 심인성 쇼크 시 시행하는 응급 관상동맥 우회술은 선택적 수술에 비해 높은 사망률을 보인다. 본 연구에서는 응급 관상동맥 우회술을 시행받은 34명의 중장기 성적에 관하여 알아보았다. 대상 뜻 방법: 1994년 6월부터 2001년 12월까지 한림대학교 강동성심병원에서 시행한 34예의 응급 관상동맥 우회술을 대상으로 하였다. 병록과 외래추적 조사를 토대로 수술전 진단과 위험인자, 수술 전 관상동맥 조영술 소견, 수술방법, 수술 사망률, 수술 합병증, 수술후 증상의 재발과 치료, 만기 사망에 대해 후향적으로 분석하였다. 결과: 응급 관상동맥 우회술의 적응증으로는 심인성 쇼크가 29예(85.3%), 내과적 치료에 반응하지 않는 흉통이 4예(11.8%), 다형성 심실빈맥이 1예(2.9%)였다. 술 전 관상동맥 조영술상 삼혈관 질환이 16예(47.1%)였고, 좌주관상동맥 질환이 8예(23.5%)였다. 수술시 대복재 정맥 81문합, 좌측 내흉 동맥 14문합을 시행하였고, 환자당 평균 문합수는 2.8$\pm$0.8개였다. 평균 대동맥 차단 시간은 평균 91.9$\pm$34.6분이었고, 평균 심폐기 가동 시간은 262.7$\pm$198.3분이었다. 조기 사망률은 50%였고, 가장 많은 사망원인은 수술 후 저심박출증(7예, 20.6%)이었다. 평균 추적조사 기간은 30.9$\pm$35.7개월이었고, 추적조사 기간 중 증상의 재발이나 만기사망률을 보인 환자는 없었다. 결론: 응급 수술의 경우 신속한 조치로 혈역학적 안정을 확보함과 동시에 심장에 비가역적인 손상이 오기 전에 적극적인 수술적 치료를 시행하여야 한다.

• Journal of Chest Surgery
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• 제42권1호
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• pp.22-27
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• 2009

배경: 관상동맥우회술은 관상동맥질환의 대표적인 치료법으로 서구에서는 장기 성적에 관하여 많은 보고들이 있으나, 우리나라에서는 매우 드물다. 따라서, 본원에서의 장기 임상성적에 관하여 알아보고자 하였다. 대상 및 방법: 1984년 2월 본원에서 처음으로 관상동맥 우회로술을 시행한 이후 2006년 12월 31일까지 시행하였던 342명의 환자를 대상으로 하였으며, 의무기록을 토대로 후향적으로 분석하였다. 총 286명(83.6%)에서 추적관찰이 가능하였으며, 평균추적관찰기간은 $75.7{\pm}46.1$개월이었다. 결과: 조기사망은 5.6%였으며, 만기사망은 23.1%였다. 1년 생존율은 91.5%였으며, 5년 생존율은 82.1%, 10년 생존율은 60.7%, 15년 생존율은 50.0%였다. 60세 이상의 고령의 환자(p=0.002), 당뇨(p=0.000), 고혈압(p=0.002), 다중혈관질환 환자(p=0.006), 그리고, 좌심실 기능부전 환자들(p=0.015) 환자들에서 생존율이 유의하게 낮았으며, 성별은 장기생존에 차이가 없는 것으로 나타났다. 다변량 분석에서는 당뇨(p=0.001), 나이(p=0.005), 좌내흉동맥을 사용하지 않는 경우(p=0.037)가 유의한 위험인자로 나타났다. 결론: 관상동맥우회술은 관상동맥질환 환자에게 있어서 효과적인 치료방법이라고 생각되며, 장기 생존을 위해서는 내흉동맥의 적극적인 사용과 당뇨환자에서 술후 혈당조절과 같은 적절한 약물치료와 외래추적관찰이 필요할 것으로 생각된다.