完全胸腔镜非体外循环冠状动脉旁路移植术的动物实验研究

目的探讨经胸壁3个1.5 cm小孔在完全胸腔镜下行非体外循环冠状动脉旁路移植术的操作技术的可行性。方法以4头25～60 kg的猪和72条8～24 kg的狗为研究对象。在胸壁打3个1.5 cm小孔,胸腔镜下,心脏跳动下,桥血管远端与左冠状动脉、前降支、对角支、回旋支等做连续吻合,近端与锁骨下动脉吻合。用11-0无损伤线连续缝合。结果 76只动物,共行冠状动脉吻合140个,每个吻合口的吻合时间20～72 min,(31.3±4.9)min,其中3个吻合口出现严重狭窄;左锁骨下动脉吻合52个,吻合时间18～58 min,(25.5±3.1)min,无严重狭窄。结论完全胸腔镜下非体外循环冠状动脉旁路移植术在动物实验中可行性。     

非体外循环下冠状动脉旁路移植术治疗左冠状动脉主干合并3支血管病变

目的总结非体外循环冠状动脉旁路移植术(OPCAB)对左冠状动脉主干合并3支血管病变患者的治疗经验及体会。方法对33例左冠状动脉主干合并3支血管病变患者施行了OPCAB,用左乳内动脉作为移植血管与左前降支进行吻合,大隐静脉作为移植血管分别与回旋支、右冠状动脉/后降支、对角支和钝缘支进行吻合。结果每例患者行旁路血管移植2～5支,平均3.4支。无手术死亡,无围手术期心肌梗死、呼吸衰竭、肝肾功能衰竭等严重并发症,术后心绞痛均消失。结论OPCAB治疗左冠状动脉主干合并3支血管病变的高危冠心病患者是可行、有效的,手术损伤小;而积极的术前准备、主动脉内球囊反搏的应用、正确的手术方法和配合、建立一支熟练快速的应急队伍是确保手术成功的关键。     

冠状动脉旁路移植术治疗6例儿童川崎病并发冠状动脉病变

目的 总结冠状动脉旁路移植治疗儿童川崎病并发冠状动脉病变的近、中期疗效.方法 2005年2月至2009年9月,6例川崎病并发冠状动脉病变病儿接受冠状动脉旁路移植,其中男5例,女1例;年龄6～12岁.确诊川崎病0.5～5.0年.冠状动脉左主干闭塞1例,左、右冠状动脉瘤样病变5例.心功能(NYHA)分级Ⅱ级1例,Ⅲ级5例.术前心脏超声示左室舒张末内径(LVDD)39～54 mm;左室收缩未内径(LVSD)23～45 mm;左室射血分数(LVEF)0.33～0.71;二尖瓣中度反流1例.均在体外循环下手术,移植血管均用动脉,平均旁路移植血管(2.0±0.6)根.其中左乳内动脉4根,桡动脉7根.同期冠状动脉成形术4例,二尖瓣成形术1例.结果 无手术死亡,体外循环平均(95.6±31.0)min;主动脉阻断平均(57.8±33.9)min.术后LVDD 32～56 mm,LVSD 21～39 mm,LVEF 0.45～0.71.冠状动脉CT示移植血管均通畅.均获随访,无远期死亡,病儿生长发育同正常同龄儿.随访0.1～4.5年,心功能平均(1.4±0.55)级.5例术后1年移植血管100%通畅,1例术后2年移植血管通畅.结论 冠状动脉旁路移植术可以有效治疗川崎病并发冠状动脉病变,全动脉化有利于旁路血管远期通畅,其近、中期疗效满意.     

经胸降主动脉微创冠状动脉旁路移植术

目的 探讨胸腔镜辅助左胸小切口、经胸降主动脉"Y"形旁路血管向心肌供血,实施非体外循环冠状动脉旁路移植术微创化的临床疗效.方法 66例冠心病病人,经左胸小切口开胸,胸腔镜游离左侧乳内动脉,经胸降主动脉"Y"形旁路血管向心肌供血,实施非体外循环冠状动脉旁路移植术,用瞬时流量测定仪检测旁路血管的通畅度.结果 平均手术(103,0±18.4)min.术后平均机械辅助呼吸(5.6±3.2)h,平均ICU滞留(37.3±7.6)h,平均胸腔引流量(190±75)ml,平均输血(150±50)ml,移植血管平均流量Qm为(27±7)mi/min,搏动指数(PI)为3.5±1.4,逆向血流百分比(%Insuf)为(7±5)%.全组病人无死亡,均治愈出院.随访12～48个月,病人病情稳定,身体状况良好.结论 该术式是微创冠状动脉旁路移植术的一个新途径.尤其适用于升主动脉存在钙化、扩张或粥样硬化斑块者,可避免升主动脉损伤、附壁斑块松动、脱落导致的脑栓塞或冠状动脉栓塞.安全、有效、创伤小.从真正意义上实现了冠状动脉旁路移植术的微创化.临床疗效显著,近期效果满意,远期效果有待进一步随访观察.     

左侧乳内动脉Y型桥OPCAB40例近期疗效观察

目的总结非体外循环下左侧乳内动脉及桡动脉Y型桥的冠状动脉旁路移植术的疗效及安全性。方法2005年1月至2008年10月,40例冠状动脉粥样硬化性心脏病患者,采用左侧乳内动脉及桡动脉作为移植物。术中采用带蒂半骨骼化的方法分别取材左侧的乳内动脉和桡动脉,端侧吻合成Y型桥,在非体外循环下,应用序贯吻合的方法进行非体外循环下冠状动脉旁路移植术。利用Medi—stim Butterfly流量计进行桥血管流量测定,并记录血流量及搏动指数。结果全组40例共行冠状动脉旁路血管移植109支,平均2．7支／例。桥血管流量测定均通畅,左乳内动脉干流量为（33±6）ml／min,搏动指数为2．2±0．5,桡动脉流量为（41±11）ml／min,搏动指数为1．9±0．6。40例中,术后3例诉手背桡侧感觉异常、麻木,围术期心肌。梗死1例,胸腔积液2例,肺部感染1例,术中室颤1例,无脑部并发症,无胸骨、纵隔感染。随访1—38个月（平均11个月）无死亡病例。结论非体外循环下仅用左侧乳内动脉及桡动脉Y型桥的冠状动脉旁路移植术是安全、有效的,可以实现全动脉化的完全心肌血运重建目的,又避免手术中对升主动脉的操作,近期效果满意。适应于升主动脉有钙化、乳内动脉正常且粗大（〉2mm）的左主干或类似左主干病变,手术近期效果满意。     

再次冠状动脉旁路移植术的临床应用

目的总结再次冠状动脉旁路移植术(CABG)治疗冠心病的临床经验和手术效果。方法2001年6月～2006年12月,对18例冠心病患者行再次CABG。术前心绞痛(CCS分级)级7例,级11例;冠状动脉造影显示:16例均有原移植静脉狭窄/闭塞,2例左乳内动脉(LIMA)-左前降支(LAD)桥狭窄/闭塞,6例自体冠状动脉出现新的病变。全组均经原胸骨正中切口径路手术,常规体外循环(CPB)下CABG15例,非体外循环冠状动脉旁路移植术(OPCAB)3例;同期行室壁瘤切除、左心室成形1例,二尖瓣成形术3例,主动脉瓣和二尖瓣双瓣膜置换联合右颈动脉内膜剥脱术1例。应用LIMA12例次、双侧IMA4例次、桡动脉3例次,其余为大隐静脉或小隐静脉。结果15例常规CABG患者主动脉阻断时间45～112min(57±26min),CPB时间66～140min(78±24min)。再次CABG每例移植血管1～5支,平均每例远端吻合口3.11个。手术结束用血流仪测定移植血管血流量均满意(血流量27.0±12.5ml/min),搏动指数均<4.2。手术后因低心排血量需主动脉内球囊反搏辅助1例,术后6d发生肾功能衰竭死亡。其余17例患者术后呼吸机辅助呼吸时间5～15h,心绞痛均消失,围手术期无心肌梗死发生,胸腔引流量为290～1040ml,顺利恢复,均出院。术后随访17例,随访时间6.0个月～4.5年,均无心绞痛发作,4例复查冠状动脉造影,显示移植血管均通畅。结论再次CABG难度大于首次CABG,但只要手术中能正确找到靶血管,移植血管的血流可靠、完全再血管化和有良好的围术期管理,再次CABG可达到与首次手术同样的效果。     

非体外循环双乳内动脉序贯旁路移植加选择性心中静脉动脉化手术的疗效分析

目的评价非体外循环双乳内动脉序贯旁路移植加选择性心中静脉动脉化（CVBG）手术的临床疗效。方法回顾性分析2004年3月至2010年8月首都医科大学附属北京安贞医院38例有弥漫性右冠状动脉狭窄患者行手术治疗的临床资料。按手术方式不同将其分为两组,CVBG组：17例,男11例,女6例;年龄46.1±6.2岁;行非体外循环双乳内动脉序贯旁路移植加选择性心中静脉动脉化。对照组：21例,男14例,女7例;年龄45.9±5.7岁;仅行双乳内动脉序贯旁路移植,但对右冠状动脉系统未做处理。术中采用血流量仪测量移植血管的血流量,并对两组移植血管支数、气管内插管时间、住院时间、主要并发症发生情况、超声心动图指标、心肌核素扫描和冠状动脉造影检查结果等进行比较。结果围术期两组患者均无死亡,均无脑部、胸骨和纵隔感染等并发症发生。CVBG组移植血管支数与对照组比较差异有统计学意义（3.3±1.1支vs.2.2±1.6支,P〈0.05）。CVBG组乳内动脉主干（81.5±32.7ml/min vs.76.8±28.4ml/min）、左乳内动脉主干（32.5±18.8ml/min vs.28.1±16.7ml/min）和右乳内动脉主干血流量（39.6±19.0ml/min vs.35.9±18.3ml/min）与对照组比较差异无统计学意义（P〉0.05）。随访38例,随访率100%,随访时间3～55个月（37.4±9.8个月）。CVBG组所有患者均未出现心绞痛,心电图示：下壁心肌缺血明显改善;对照组术后有8例患者出现心绞痛,心电图示：有下壁心肌缺血,ST-T改变;两组间差异有统计学意义（P〈0.05）。两组患者术后3个月心功能较术前明显改善。心肌核素扫描显示：CVBG组患者下壁心肌血液供应明显改善;冠状动脉造影证实动脉化后的冠状静脉内有血流通过。结论在非体外循环下行双乳内动脉序贯旁路移植加选择性心中静脉动脉化是可行的,术后患者心功能和生活质量均得到改善,为弥漫性右冠状动脉狭窄患者提供了新的外科治疗方法。     

非体外循环冠状动脉旁路移植术治疗重症冠状动脉粥样硬化性心脏病

目的探讨非体外循环冠状动脉旁路移植术治疗重症冠状动脉粥样硬化性心脏病(冠心病)的可行性. 方法回顾分析2002年1月～12月37例重症冠心病的临床资料.均采用全麻,胸骨正中切口,游离左乳内动脉及大隐静脉.心脏稳定器局部固定心肌,显露目标冠状动脉,切开后置入冠状动脉内血液分流器.一般先做左乳内动脉与左冠状动脉前降支的吻合,其余血管桥先做桥血管与主动脉的近心端吻合,然后再做桥血管与冠状动脉的吻合. 结果全组病例均在非体外循环下完成手术,搭桥1～6支,(3.2±0.5)支.术后10 d死亡1例,其余36例未发生围术期心肌梗死,无呼吸功能不全、肾功能不全、脑血管意外等严重并发症. 结论在成熟的手术技术和严格的围手术期管理的条件下,非体外循环冠状动脉旁路移植术治疗重症冠心病可行.     

非体外循环下双侧乳内动脉Y型桥的冠状动脉旁路移植术125例

目的总结非体外循环下采用双侧乳内动脉Y型桥进行完全心肌血运重建的冠状动脉旁路移植手术125例的近期疗效。方法2002年10月至2005年12月,完成125例不停跳非体外循环下双侧乳内动脉Y型桥的冠状动脉旁路移植手术,术中采用带蒂半骨骼化的方法分别取材左、右侧的乳内动脉,将左、右乳内动脉端侧吻合成Y型桥;在非体外循环下,应用序贯吻合的方法进行冠状动脉搭桥手术。结果全组125例患者共搭桥413支,平均搭桥支数3．3支／例。术中流量测定桥血管均通畅。全组患者无围手术期死亡。结论非体外循环下双乳内动脉Y型桥的冠状动脉旁路移植手术是安全、有效的方法,可以实现全动脉化的完全心肌血运重建,又避免手术中对升主动脉的操作,近期效果满意。     

微创冠状动脉旁路移植手术33例报告

目的探讨微创冠状动脉旁路移植手术(minimally invasive direct coronary artery bypass graft,MIDCABG)的可靠性及安全性. 方法 2001年3月～2003年9月,我院在全麻、非体外循环、心脏不停跳下进行了33例单支MIDCABG.14例采用左前外侧小切口,19例采用胸骨下段正中切口.31例行左乳内动脉至前降支旁路移植,1例使用大隐静脉行主动脉根部至前降支旁路移植,1例行胃网膜右动脉至后降支旁路移植. 结果全组无手术死亡.术中出血量(163±120)ml,术后引流量(193±169)ml,术后拔管时间(6.4±5.5)h,ICU时间(17.8±4.4)h.随访(14.7±7.4)月,无死亡. 结论 MIDCABG安全可靠,具有创伤小、出血量少、并发症少的优点.     

体外循环与非体外循环冠状动脉旁路移植术患者桥血流的对比研究

目的比较非体外循环和体外循环下冠状动脉旁路移植术(CABG)的左乳内动脉(LIMA)和大隐静脉(SV)桥血流的变化。方法将547例行CABG患者分为非体外循(OPCAB)组(403例)和体外循环(CCABG)组(144例)。常规用LIMA与左前降支(LAD)吻合,其余靶血管使用SV吻合。于全部吻合口吻合完毕血流动力学稳定情况下,用即时血流测量仪(TTFM)直接测量并记录桥血流各项参数。结果搏动指数(PI值)、无效血流率及舒张期峰流量,LIMA桥OPCAB组分别为2.7±1.8,(2.2±4.3)%,(46.8±2.7)m l/m in,CCABG组分别为2.8±2.0,(3.4±3.1)%,(52.8±3.7)m l/m in;SV桥,OPCAB组分别为2.8±0.1,(1.8±0.3)%,(85.8±3.2)m l/m in,CCABG组分别为2.6±0.2,(1.3±0.2)%,(93.9±5.6)m l/m in,两组比较差异均无统计学意义(P均>0.05);平均流量及收缩期峰流量,CCABG组[SV桥(62.9±3.9)与(106.9±7.3)m l/m in,LIMA桥(32.5±23.5)与(41.6±4.4)m l/m in]均大于OPCAB组[SV桥(47.2±1.7)与(58.0±2.7)m l/m in,LIMA桥(26.5±19.9)与(27.0±1.6)m l/m in],差异有统计学意义(t=6.61,6.77,5.16,5.96,P均<0.01);CCABG组血管阻力LIMA桥与SV桥分别为(3.6±0.3)与(1.6±0.2)mm Hg.m l-1.m in-1,小于OPCAB组的(4.7±0.2)与(2.7±0.1)mm Hg.m l-1.m in-1,两者比较差异有统计学意义(t=4.32,P均<0.01)。结论CCABG组与OPCAB组对比,桥血管的通畅率无显著性差别。     

Off-pump coronary artery bypass using bilateral in situ internal thoracic artery grafts for left coronary artery system: a case report

A 63-year-old man with triple vessel disease in the coronary artery and multiple arterial stenoses in intra-cranial vessels underwent off-pump coronary artery bypass (OPCAB). We were able to perform three coronary artery bypass grafting (in situ left internal thoracic artery (left ITA)--left anterior descending artery, in situ right ITA--circumflex artery through the transverse sinus, and saphenous vein graft--right coronary artery) using octopus 2 and "Lima" suture technique without cardio-pulmonary bypass. Operation time was 355 minutes and established blood loss was 440 ml. Postoperative course was uneventful. Postoperative angiogram revealed well patent three grafts. Using bilateral in situ ITAs OPCAB could achieve high quality.     

Recurrent angina due to high grade re-stenosis of the left subclavian artery after coronary artery bypass grafting in a patient on hemodialysis for chronic renal failure: report of a case

A 49-year-old woman on hemodialysis for chronic renal failure was admitted to our hospital with chest pain. She had undergone quadruple coronary artery bypass grafting (CABG) including a left internal thoracic to left anterior descending coronary artery anastomosis 9 months earlier. The blood flow through the left internal thoracic artery had decreased due to high grade stenosis at the proximal portion of the left subclavian artery, and recurrent angina had developed. She was treated by the placement of Palmaz biliary stents in the left subclavian artery, but re-stenosis occurred after 9 months, causing recurrent angina again. There fore, an operation was proposed and bypass grafting from the descending aorta to the left subclavian artery was successfully performed, resulting in complete resolution of her recurrent angina. This case serves to reinforce that patients on dialysis must be carefully followed up after CABG.     

Experimental off-pump coronary bypass using a robotic telemanipulation system.

We hypothesized that a high-quality anastomosis between the left internal thoracic artery and the left anterior descending coronary artery could be constructed off-pump using a 4-degrees-of-freedom robotic telemanipulation system, endoscopic myocardial stabilization, and two-dimensional visualization. Nine swine were used. Three ports were created on the left chest for the endoscope and the two robotic arms, and another port was created on the right chest for the endostabilizer. Quality of anastomosis was assessed by angiography, analysis of flow, survival after proximal coronary ligation, and histopathology. All nine anastomoses were completed successfully in 22 +/- 3.6 minutes without the need for repair stitches. Left internal thoracic artery flow was 21.6 +/- 2.5 ml/min with diastolic dominant pattern. Eight animals (89%) survived for 60 minutes with the proximal left anterior descending coronary ligated. Angiographic patency was 100% with Fitzgibbon grade A in all. Histopathology of the anastomosis demonstrated minor changes in the integrity of the endothelium and the internal elastic lamina and absence of medial necrosis. We have demonstrated in our robotic off-pump coronary bypass model that a high-quality anastomosis can be constructed between the left internal thoracic artery and the left anterior descending coronary artery. These results support continued research towards robotic endoscopic off-pump CABG.     

Changes in jugular bulb oxygen saturation during off-pump coronary artery bypass graft surgery

BACKGROUND: The effect of haemodynamic derangement during coronary artery anastomosis in off-pump coronary artery bypass surgery on cerebral blood flow has not been elucidated. Jugular bulb oxygen saturation is a useful indicator of cerebral blood flow provided that the cerebral metabolic rate is constant. This study was designed to evaluate the changes in jugular bulb oxygen saturation during off-pump coronary artery bypass surgery. METHODS: With IRB approval, 48 patients were included. After anaesthesia, an 18-G catheter was introduced into the jugular bulb. Haemodynamic variables and oxygen profiles from gas analysis of jugular bulb blood and arterial blood were obtained: after sternotomy (baseline); at 5 min after the beginning of the anastomosis of the left anterior descending artery, obtuse marginal artery, and right coronary artery; and after sternal closure. RESULTS: Cardiac index and mixed venous oxygen saturation decreased significantly during anastomosis of all three arteries compared to the baseline value. Although the changes in jugular bulb oxygen saturation during anastomosis were statistically significant compared to its baseline value, jugular bulb oxygen saturation remained within normal limit throughout the study. CONCLUSIONS: Jugular bulb oxygen saturation, which represents the global cerebral oxygenation, was well maintained during the anastomosis of all coronary arteries despite significant haemodynamic changes during off-pump coronary artery bypass (OPCAB).     

Comparison of active and passive coronary perfusion in off-pump coronary artery bypass grafting

The myocardial protective effects of active and passive coronary perfusion were compared during off-pump coronary artery bypass grafting (OPCAB) in coronary stenosis model. An internal shunt tube was placed in the proximal left anterior descending arteries of adult dogs to produce a 75% coronary stenosis model. In 10 animals passive coronary perfusion was performed using an internal shunt tube placed in a pseudo-anastomotic site, and active coronary perfusion was performed through an external shunt tube. Ischemia was examined at normal and low blood pressure, based on hemodynamics, regional myocardial blood flow, and oxygen and lactate extraction in the perfused area. With passive perfusion, regional myocardial blood flow decreased and oxygen extraction and regional lactate production increased at normal blood pressure, indicating myocardial ischemia. Regional myocardial blood flow further decreased at low blood pressure. In contrast, regional myocardial blood flow with active perfusion did not change at normal or low blood pressure, and oxygen and lactate extraction were unchanged, indicating prevention of myocardial ischemia. Myocardial ischemia can occur with passive perfusion even at normal blood pressure. Active coronary perfusion that provides sufficient regional perfusion prevents myocardial ischemia during coronary artery anastomosis in OPCAB.     

Robotically enhanced coronary artery bypass surgery

Robotically enhanced telemanipulation surgery is a rapidly developing technique which enables totally endoscopic cardiac surgery with utmost precision and perfection on both beating heart and arrested heart. Between December 2002 and September 2006, 268 patients underwent robotically enhanced coronary artery bypass surgery using the da Vinci telemanipulation system. Fourteen patients underwent total endoscopic coronary artery bypass surgery. Of these 12 were performed on a beating heart and 2 on an arrested heart. Two-hundred and fifty-four patients had endoscopic takedown of the internal mammary artery followed by minimally invasive direct coronary artery bypass in 193 patients and left anterolateral thoracotomy in 61 patients. The internal mammary artery mobilization time was 36 min (28–76 min) and the left internal mammary artery to left anterior descending artery anastomosis time ranged from 20 to 36 min for the totally endoscopic coronary artery bypass patients. The right internal mammary artery of one patient was anastomosed to diagonal artery totally endoscopically. The mean internal mammary artery flow by Doppler measurement in patients undergoing minimally invasive direct coronary artery bypass was 58 ml min⁻¹. Seven patients required conversion to median sternotomy and coronary bypass surgery on the beating heart. The mean intensive care unit stay was 1.2 days and the mean hospital stay 4.5 days. There was one in-hospital mortality. All 14 patients who underwent total endoscopic bypass surgery had coronary angiography 3 months later which showed 100% patency in 13 patients. One patient had 50% anastomotic narrowing for which coronary angioplasty was performed in the same sitting. By using telematic technology, a complete endoscopic anastomosis is possible in both single vessels and suitable double vessel disease patients. The use of robotics is now extended to achieve complete myocardial revascularization by harvesting both the internal mammary arteries and making a small thoracotomy for direct anastomosis also.     

Off-pump coronary artery bypass via left thoracotomy in patient with infective pancreatic fistula after surgery for bile duct carcinoma; report of a case

A 62-year-old man with infective pancreatic fistula after surgery for bile duct carcinoma underwent off-pump coronary artery bypass (OPCAB) through left thoracotomy to avoid the use of cardiopulmonary bypass and the postoperative mediastinitis, since this patient has infective pancreatic fistula close to the xiphoid process. The coronary arterial revascularizations were performed: left internal thoracic artery to left anterior descending branch and saphenous vein graft to descending thoracic aorta. The aortic mechanical anastomosis device, aortic connector, was utilized the proximal anastomosis of saphenous vein graft so as to avoid aortic clamp, while the distal anastomoses were completed with stabilizer and apical retraction device. Postoperative angiogram showed both grafts were patent. No signs of infection or recurrence of malignant neoplasm was observed. OPCAB via left thoracotomy is one of useful options for patients in whom median sternotomy is not suitable approach for myocardial revascularizations.     

Off-pump coronary artery bypass grafting using graft to coronary shunt for acute coronary syndrome

We developed graft to coronary shunt during off-pump anastomosis. Proximal anastomosis of saphenous vein graft (SVG) was done formerly, and vinyl chloride tube, 5 cm long and 2 mm in diameter, was inserted into SVG. Another end was inserted into coronary artery, and continuous suture around the tube was performed before removing the tube. This technique is fit to use for the anastomosis between SVG and #3. Because the tube is easily inserted into those parts without injury of intima, and distal right coronary artery needs enough blood supply. After the revascularization of left anterior descending artery and #3, the heart can be displaced to expose circumflex artery. We adopted this technique to 3 patients with acute coronary syndrome (ACS). Though this technique is not adopted for the patients having stenosis on #4, we conclude that SVG to coronary shunt could be a important part of the strategies of off-pump coronary artery bypass grafting (OPCAB) for ACS patients.