• Title/Summary/Keyword: 관상동맥우회로술

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Harvesting of Radial Artery With Harmonic Scalpel (Harmonic Scalpel을 이용한 요골동맥의 적출)

  • 이현성;강정한;최성실;장병철
    • Journal of Chest Surgery
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    • v.34 no.6
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    • pp.499-501
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    • 2001
  • In the 1970s, the radial artery was proposed as a coronary artery bypass graft but then was abandoned due to graft occlusion secondary to spasm during harvesting. Development of new pharmacologic antispasmodic agents and minimal traumatic harvesting techniques has led to the revival of the use of the radial artery in coronary artery bypass procedures. Harmonic Scalpel(Ultracision Inc, Smithfield, Rl) offers the surgeon the ability to perform less traumatic, spasm free, and rapid radial artery harvesting.

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The In-hospital Analysis of Outcome of Off-pump CABG and On-pump CABG (비체외순환 및 체외순환하에서의 관상동맥우회로술의 임상 고찰)

  • 안재범;김인섭;정성철;배윤숙;유환국;김병열;김우식
    • Journal of Chest Surgery
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    • v.37 no.9
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    • pp.762-767
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    • 2004
  • With the developement of non-invasive surgical techeniques, coronary artery bypass graft without cardiopulmonary bypass has become popular. We compared the preoperative risk factors and in-hospital outcomes of patients having off-pump CABG with these having on-pump CABG. Material and Method: From January 2001 to June 2003, 87 patients underwent CABG. Thirty-sin patients underwent on-pump CABG, fifty-one patients under-went off-pump CABG. Preoperative risk factors, extent of coronary disease, operative time, postoperative endotracheal intubation time, duration of ICU stay & hospital stay, the amount of bleeding and postoperative levels of cardiac enzymes were compared in both groups, Result: The were no differences in their sex ratios, ages, preoperative risk factors, preoperative Ml, Canadian classes, extent of coronary artery diseases and, echocardio-graphic ejection fraction between Off-pump CABG and On-pump CABG groups. Off-pump CABG group had significantly lower mean operative time (270$\pm$79.3 min vs 372$\pm$142.2 min, p<0.001), mean ventilation time (17.1$\pm$13.4 hr vs 24.3$\pm$17.8 hr) and CK-MB level (8,9$\pm$18.7 IU/L vs 25.7$\pm$8.4 IU/L) than on-pump CABG groups, On-pump CABG group had more distal grafts (2.2$\pm$0.5 vs 1.7$\pm$0.71 than Off-pump CABG groups did. There were no differences in their postoperative complications and outcomes including amount of postoperative bleeding for 24 hrs, reoperation for bleeding control, mean in-hospital days, postoperative infection, renal failure and neurologic complications between Off-pump CABG and On-pump CABG groups. Conclusion: This study showed that patients who underwent Off-pump CABG had less operation time & intubation time and lower CK-MB level; however, they also have less distal graft. Even though CABG without CPB provided satisfactory results, more clinical experience & longer follow-up is required.

Comparison of Multidetector Computed Tomography with Coronary Angiography for Evaluation of Coronary Artery Bypass Grafts (관상동맥조영술과 MDCT를 이용한 관상동맥 이식편의 비교평가)

  • Yoo, Byung-Su;Shin, Yoon-Cheol;Kim, Kun-Il;Kim, Eung-Jung;Chee, Hyun-Keun
    • Journal of Chest Surgery
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    • v.39 no.1 s.258
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    • pp.42-47
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    • 2006
  • Background: The new Multidetector Computed Tomography (MDCT) is useful in visualization of complex coronary artery anatomy. We investigated usefulness comparing of invasive coronary angiography with noninvasive MDCT in judgment of functional degree of coronary arteries grafts after coronary artery bypass graft operation. Material and Method: We analyzed the patency of 52 conduits from 15 patients whom consented to take both 32 Channel MDCT and coronary angiography from November 2003 to November 2004. Comparisons were performed for sensitivity, specificity, positive prediction value and negative prediction value between coronary angiography and 3 dimensional reconstruction image using MDCT. Result: The average graft used was 3.4 $\pm$ 0.8 per patient. Average heart rate during MDCT was 86/minute (Range, 60$\∼$110/minute) without administration of $\beta$-blocker. All patients could hold breath as much as necessary. The average graft patency obtained through corollary angiography was 96.2$\%$. In MDCT group, the sensitivity, the specificity, the positive predictive value and the negative predictive value for diagnosis was 100$\%$, 98.0$\%$, 100$\%$ and 66.6$\%$ respectively. Conclusion: The effectiveness of 32 Channel MDCT may be compared to coronary angiography in grasping about patency and bloodstream of graft conduits after coronary artery bypass graft. Also MDCT has the advantage of noninvasiveness and inexpensiveness compared to coronary angiography.

Transmyocardial Laser Revascularzation for Patients with Recurrent Angina after CABG -Report of 3 cases - (관상동맥 우회로술 후 재발한 협심증의 경심근 레이저 혈류 재건술 치험 3례)

  • Lee, Ho-Seok;Park, Kay-Hyun;Jun, Tae-Gook;Park, Pyo-Won;Chae, Hurn
    • Journal of Chest Surgery
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    • v.33 no.7
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    • pp.576-580
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    • 2000
  • Transmycardial laser revascularization has made its position as a sole therapy for patients with chronic angina nonamenable to maximal medical therapy, percutaneous transluminal coronary angioplasty, and coronary artery bypass grafting. We report three cases of transmyocardial laser revascularization as a sole therapy for patients with recurrent angina after CABG.

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Noninvasive Evaluation of Coronary Artery Bypass Graft Patency by Electron Beam Tomography (전자선 단층 촬영을 이용한 관상동맥 우회로 개존의 비침습적 평가)

  • 최규옥;김호석;조범구
    • Journal of Chest Surgery
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    • v.32 no.8
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    • pp.693-701
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    • 1999
  • Recently non-invasive diagnostic imaging replaced the invasive catheter angiography in the diagnosis of vascular disease. Catheter methods are now almost confined to the purpose of intervention. Coronary artery or coronary artery bypass graft still needs catheter technique because of small diameter and the cardiac motion. The last challenge for radiologists in this domain is to obtain a non-invasive imaging. Electron beam tomography(EBT) for high temporal resolution is able to obtain a coronary arteriogram or coronary artery bypass graft (CABG), of which CABG imaging is quite useful for the evaluation of patency. In our experience as well as others, the accuracy of EBT angiogram in evaluating CABG patency revealed that the accuracy of patency of saphenous vein grafts(SVG) is high due to relatively wide lumen, short and straight course and less influence from cardiac motion. The sensitivity and specificity of patency of SVGs were 92%, 97% respectively in the prospective evaluat on and 100% each in the retrospective evaluation. A false positive and a false negative case are rudimentary errors in the initial learing period. In contrast the analysis of left internal mammary artery(LIMA) graft was difficult due to the inherent small size and the adjacent surgical clips provoking beam-hardening artifact; therefore, the method of combining 3 dimensional reconstruction and flow mode study was important in improving the accuracy of LIMA patency. The sensitivity and specificity of LIMA patency were 100% and 80% in both prospective and retrospective evaluation. Therefore, EBT angiography is an accurate non-invasive diagnostic modality for evaluating the patency of CABG, particularly in SVGs. The accuracy can be improved with the improvement of the EBT and the development of the image reconstruction software.

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Analysis of Bypass Grafting Effects in Stenosed Coronary Arteries (협착이 발생된 관상동맥에 대한 이식우회로술의 효과분석)

  • Kim, Hyoung-Ho;Suh, Sang-Ho;Lee, Jeong-Sang
    • Transactions of the Korean Society of Mechanical Engineers B
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    • v.36 no.2
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    • pp.153-159
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    • 2012
  • Bypass anastomosis is frequently adopted for surgical treatments of stenosed coronary arteries. Optimal coronary bypass grafting should be investigated to improve the patency in arterial bypass techniques. The objective of this study is to analyze the effects of Y-grafting bypasses and T-grafting bypasses for various bifurcation and anastomotic angles. In order to find the optimal geometric configuration, the hemodynamic characteristics are obtained and compared with each other for different geometries. We found that both the left anterior descending artery (LAD) and left circumflex artery (LCX) blood flows were distributed evenly when the bypass grafting angle and bifurcated angle were $30^{\circ}$ and $15^{\circ}$, respectively,.

Effectiveness of MDCT for the Followup of CABG Patients with LIMA to LAD and Saphenous Veins to Others (좌내흉동맥과 복재정맥편을 사용한 관상동맥우회로술 환자에서의 추적조사에서 MDCT의 유용성)

  • Kang Joon Kyu;Kim Hyung Tai;Park In Duk;Chung Young Mi;Lee Cheol Joo
    • Journal of Chest Surgery
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    • v.38 no.6 s.251
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    • pp.410-414
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    • 2005
  • There are several options for choosing a graft in CABG, we routinely chose LIMA for LAD and great saphenous vein for other target vessels. To evaluate the posoperative graft patency, we have studied the results using a 16 slices multi-detector computed tomography. Material and Method: From 1995 to 2003, 80 CABG patients who did not complain any event of MACE have been examined by 16-MDCT, mostly in an out patient clinic. Result: There were 61 men and 19 women. MDCT was used as early as 7 days to 9 years post-operatively with a median follow-up period of 6.5 years, and mean follow-up peiod of $31.5\pm25.4$ months. Mean age was $58.4\pm12.6$ years old in men and $61.5\pm17.2$ years old in women. 72180 patients received LIMA to LAD, and all other patients received vein grafts for bypass. The target vessel of vein grafts were 8 in LAD, 47 in RCA, 60 in diagonals, and 61 in obtuse marginals. Among them 42 sequential anastomoses were performed. The mean graft number was $3.1\pm1.8$ grafts. 5 year graft patency rate of each grafts was as followings; $93.1\%$ in LIMA to LAD, $94.9\%$ in vein to diagonals, $92.1\%$ in vein to obtuse marginals, and $79.2\%$ in vein to RCA. Sequential grafting showed better graft patency than the isolated grafting $(95.2\%\;vs\;78.7\~95.0\%)$. Conclusion: In this study, CABG with LIMA and saphenous veins showed satisfactory longterm results. 16-MDCT provided good images for follow-up study after CABG. Additionally, as radiologic tools (64-MDCT, MRI) improve more in the future, they can be used for diagnosing preoperative anatomical coronary disease as well as cardiac functions.

The Usefulness of Transesophageal Echocardiography During Heart Surgery (개심술을 시행하는 환자에서 경식도 심초음파의 이용)

  • 조규도;김치경
    • Journal of Chest Surgery
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    • v.30 no.12
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    • pp.1205-1213
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    • 1997
  • This study reviewed useful aspects of the intraoperative transesophageal echocardiography among the patients in whom heart surgery were undertaken between January 1996 and July 1996 at St.Pauls hospital, Medical College of Catholic University, Seoul, Korea. During that period, 61 patients were operated on because of valvular heart disease(25 patients), coronary artery disease(22 patients), congenital heart disease(13 patients), and combined coronary artery disease and valvular heart disease(1 patient). Two patients(1 redo-VSD and 1 valvular heart diease) needed repeated aortic cross clamping and complementary procedures because of incomplete initial procedures. There was no incidence of air embolism. We could observe significant relationship of cardiac output monitoring methods either by thermodilution technique and transesophageal echocardiography by linear regression analysis(p<0.001). We tested myocardial response(percentage of systolic wall thickness, PSWT) with low dose dobutamine challenge to predict post-CABG myocardial perfusion. And the test showed statistically significant resp.onse(sensitivity 76%, specificity 94.7%, positive predictive value 95%, negative predictive value 75%). These results suggest that cardiac surgeon could draw more benefits by intraoperative transesophageal echocardiography.

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CABG for Treating Unstable Angina with Multivessel Coronary Artery Aneurysms - A case report- (다혈관 관상동맥류가 동반된 불안정성 협심증 환자에서의 관상동맥 우회로술)

  • Kim, Jin-Sik;Chee, Hyun-Keun;Chung, Jin-Woo;Kim, Jun-Seok;Shin, Je-Kyoun;Song, Meong-Gun
    • Journal of Chest Surgery
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    • v.43 no.6
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    • pp.743-746
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    • 2010
  • Coronary artery aneurysm is an uncommon disease. The optimal medical or surgical treatment for this disease remains obscure. The causes of coronary artery aneurysms include atherosclerosis, Kawasaki disease, infectious vascular disease, connective tissue disorder and congenital malformation. A 50 year old man visit our institution for chest pain that had started 3 days previously. After coronary angiography, multiple coronary aneurysms were diagnosed and successful surgical intervention was performed.

Availability of the Skeletonized Gastroepiploic Artery as a Free Graft for Coronary Artery Bypass Grafting (관상동맥 우회로 조성술에 있어 유리 이식편으로 사용된 골격화 우위대망 동맥의 효용성)

  • Ryu Sang-Wan;Ahn Byong-Hee;Hong Seong-Beom;Song Sang-Yun;Jung In-Suk;Beom Min-Sun;Park Jung-Min;Lee Kyo-Sun;Ryu Sang-Woo;Yoon Ju-Sik;Kim Sang-Hyung
    • Journal of Chest Surgery
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    • v.38 no.9 s.254
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    • pp.601-608
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    • 2005
  • Background: To maximize the histological advantage and minimize the physiological disadvantage, we have been using the skeletonized gastroepiploic artey (GEA) as a free graft for total arterial revascularization. The aims of the current study was to assess the efficacy of the skeletonized GEA as a composite or extended graft for total arterial revascularization. Material and Method: Between January 2000 and Feburary 2005, 133 patients (43 female, mean age=61.8 yrs) undergoing coronary artery bypass grafting (CABG) with a skeletonized GEA as free graft (22 extended, 107 composite and 4 others) were enrolled in this study. Coronary angiograms were performed in the immediate (median 44 days, n=86), early (median 366 days, n=56) and midterm (median 984 days, n=29) postoperative periods. Result: There were 3 ($2.2\%$) early and 4 ($3.3\%$) late cardiac-related deaths. The mean number of distal anastomoses per patient was 3.34 for total graft and 1.92 for GEA graft. The immediate, early, and midterm GEA patency were 157/159 ($98.7\%$), 106/142 ($94.6\%$), and 53/56 ($94.6\%$), respectively. During follow-up, four patients required percutaneous intracoronary intervention because of GEA and target coronary artery stenosis or competitive flow. Conclusion: These data demonstrate satisfactory clinical and angiographic results in the skeletonized GEA as free graft for total arterial revascularizatioh. Although we need a careful longer follow-up, the skeletonized GEA as a free graft will be a valuable option 'to be' for CABG.