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Surgical Treatment for Chronic Total Occlusion of Coronary Artery with Offpump Coronary Artery Bypass Grafting

Objective To investigate the surgical therapy for chronic total occlusion (CTO) of coronary artery with offpump coronary artery bypass grafting (OPCAB). Methods From Aug. 1999 to Oct. 2007, 696 patients with 853 totally occluded coronary arteries (127 coronary arteries lack of opacification while the other 726 arteries with reverse flow showed by coronary angiography) underwent OPCAB. A total of 2 231 grafts were constructed including 136 placed to coronary endarterectomy (CE) targets and 28 arterialized middle cardiac veins. Blood flow was detected during operation in 26 coronary arteries with no opacification in preoperative angiography, while no blood flow was detected in 63 coronary arteries with opacification in preoperative angiography. Cardiopulmonary bypass was applied in 15 cases because of a poor hemodynamics and 6 of which were assisted with intraaortic balloon pump(IABP). Results All patients survived the operation. 6 died in hospital because of low cardiac output (2 cases), renal failure (2 cases), perioperative cardiac infarction (1 case) or cerebrovascular accident (1 case). Stress ulceration occurred in one case, mediastinal infection occurred in another case after operation. Both were treated medically and recovered. 692 patients were followed up and the rate of flup was 99.42%(685/686)， with 4 withdrawal. Freedom from cardiac angina was 99.85%(685/686) and cardiac functional grading (NYHA) was Ⅰ-Ⅱ. Conclusion OPCAB can be well performed in patients with chronic total occlusion of coronary arteries. The ralue of coronary angiography for evaluating totally occluded coronary artery is limited, and endoscope or intravascular ultrasound techniques may be helpful.

Surgical Therapy for Valve Diseases Combined with Coronary Heart Diseases in Patients Over or Below 70 Years Old

Surgical Therapy for Valve Diseases Combined with Coronary Heart Diseases in Patients Over or Below 70 Years Old YU Lei, GU Tianxiang, SHI Enyi, XIU Zongyi, FANG Qin, ZHANG Yuhai. (Department of Cardiac Surgery, The No. 1 Hospital of China Medical University, Shenyang 110001, P.R. China)Corresponding author: GU Tianxiang, Email: cmugtx@sina.comAbstract： Objective To summarize the experiences of valve replacement combined with coronary artery bypass grafting (CABG) in senile patients by comparing clinical outcomes of valve diseases combined with coronary heart diseases in patients over or below 70 years old. Methods We retrospectively analyzed the clinical data of 49 patients who received valve replacement combined with CABG in our department from May 1999 to December 2007. Based on the age, the patients were divided into ≥70 years group (17 cases) with its patients at or above 70 years old and lt;70 years group (32 cases) with its patients younger than 70. The percentage of chronic obstructive pulmonary diseases (COPD) before surgery in ≥70 years group was higher than that in lt;70 years group(Plt;0.05). No significant difference was found in the other relevant factors between the two groups. The clinical index of patients in the two groups were compared and analyzed. Results There were significant differences between the two groups in such factors as the percentage of biovalve use (82.4% vs. 12.5%, χ2=23.311, P=0.000), the time of mechanic ventilation (34.5±29.3 h vs. 18.0±16.1 h, t=-2.542,P=0.014), the time of ICU stay (4.4±1.5 d vs. 3.3±0.7 d, t=-3.522, P=0.001), the time of hospital stay (21.4±7.7 d vs. 18.1±1.8 d, t=-2.319, P=0.025), the percentage of IABP use (29.4% vs. 6.3%, χ2=4.862, P=0.037), the percentage of pulmonary function failure (35.3% vs. 6.3%, χ2=6.859, P=0.009), the percentage of acute renal failure (23.5% vs. 3.1%, χ2=5.051, P=0.025), and the percentage of cerebrovascular accident (11.8% vs. 0.0%, χ2=3.933, P=0.048). There was no significant difference between the two groups in factors like the anastomosis of distal graft (2.5±3.1 vs. 2.4±14, t=0.301, P=0.758), the time of aortic occlusion (89.3±25.4 min vs. 88.5±31.0 min, t=0.108,P=0.913), the time of cardiopulmonary bypass (144.6±44.8 min vs. 138.3±52.9 min, t=0.164, P=0.871) and the mortality (5.9% vs. 6.3%, χ2=0.002,P=0.959). The perioperative myocardial infarction rate was zero in both groups. ≥70 years group patients were followed up for 2 months to 9 years with only 1 case missing. One patient who had undergone mechanic valve replacement died of cerebral hemorrhage 1.5 years after operation. Two died of heart failure and lung cancer 3 months and 6 years after operation respectively. For all the others, the cardiac function was at class Ⅰ to Ⅱ and their life quality was significantly improved. The follow up time of lt;70 years group was 1 month to 6 years and 5 cases were missing. Four patients who had undergone mechanic valve replacement died of complications in relation to anticoagulation treatment. One died of severe low cardiac output. Another died of traffic accident. Conclusion Surgery operation and effective perioperative treatment are key elements in improving surgery successful rate and decreasing mortality in patients with valve and coronary artery diseases. Valve replacement combined with CABG is safe for patients older than 70 years old.

有神经系统并发症感染性心内膜炎的外科治疗

80岁以上老年患者行非体外循环冠状动脉旁路移植术16例

心脏恶液质瓣膜病患者的外科治疗

连续性肾脏替代疗法改善合并慢性肾脏病冠状动脉旁路移植术患者的预后

目的 总结连续性静脉静脉血液透析滤过（CVVHDF）在冠心病合并慢性肾功能不全患者施行冠状动脉旁路移植术（CABG）后的应用经验。 方法 1998年8月至2008年2月对我院收治的14例冠心病合并慢性肾功能不全患者（其中2例术前因肾功能衰竭行规律透析治疗，12例合并肾功能不全未透析治疗）行CABG，术后应用CVVHDF，观察CVVHDF对患者的心率、中心静脉压、平均动脉压、动脉血氧分压、肾功能变化以及围术期和预后情况。 结果 14例患者中10例在体外循环下完成手术，4例在非体外循环下完成手术，术后均进行CVVHDF，透析6 h后患者心率由106.07±8.84次/分下降为95.64±8.44次/分，中心静脉压由22.64±2.90 cm H2O降为12.71±2.95 cm H2O，肌酐由467.21±103.38 μmol/L降为358.50±91.27 μmol/L，尿素氮由20.29±4.32 mmol/L降为14.29±3.17 mmol/L，较未透析时明显下降；而平均动脉压由62.79±4.84 mm Hg升高到71.93±7.52 mm Hg，动脉血氧分压由68.71±11.21 mm Hg升高到78.71±11.14 mm Hg，较未透析时明显升高。死亡2例，2例放弃治疗，其余10例患者中有4例改为内科规律透析治疗，6例肾功能恢复至术前水平，出院后尿量恢复未再行透析治疗。术后随访36.90±29.06个月，心绞痛症状均消失，生活质量明显提高。 结论 CVVHDF是改善冠心病合并肾功能不全患者施行CABG预后的有效方法，早期的透析可以取得较好的疗效。

无名动脉插管简化支架“象鼻”手术治疗DeBakey Ⅰ型主动脉夹层

冠状动脉旁路移植术治疗左主干分叉病变

目的 探讨冠状动脉左主干分叉病变的外科治疗方法，总结其临床经验。 方法 1999年3月至2008年4月我院共收治29例冠状动脉左主干分叉病变患者，在体外循环心脏不停跳下行冠状动脉旁路移植术(CABG)，观察体外循环时间、术后呼吸机辅助时间、 ICU时间、住院时间、围术期以及随访情况。 结果 体外循环时间为482±15.5 min，术后呼吸机辅助时间14.2±4.6 h，住ICU时间3.3±0.8 d，住院时间18.0±2.7 d，无围术期心肌梗死发生。本组患者随访7～98个月 (29.0±19.2个月)，25例心绞痛症状完全消失，2例心绞痛症状缓解，3例于术后3年、4年和8年分别死于脑血管病变、心脏骤停及肺癌。超声心动图检查提示:左心室收缩功能获得不同程度的改善。 结论 冠状动脉左主干分叉病变应用体外循环心脏不停跳CABG可以取得良好的治疗效果。

Clinical study of acute renal injury after deep hypothermic circulatory arrest

ObjectiveTo investigate the incidence of acute kidney injury (AKI) after deep hypothermic circulatory arrest (DHCA), to explore the risk factors and prognosis of postoperative AKI, and to establish a relatively accurate preoperative risk assessment strategy and prevention measures.MethodsThe clinical data of 252 patients who underwent deep hypothermic circulatory surgery in our hospital from January 2014 to October 2018 were retrospectively analyzed. There were 179 males and 73 females with an average age of 53.6±11.6 years. The patients were divided into an AKI group and a non-AKI group according to the AKI diagnostic criteria developed by kidney disease improving global outcomes (KDIGO). The data of the two groups were compared, and the risk factors related to AKI after DHCA were analyzed by single factor and multivariate logistic regression.ResultsAmong the 252 patients enrolled, the incidence of AKI was 69.0%. The postoperative hospital mortality rate was 7.9% (20/252). The univariate analysis showed that the patient's age and body mass index (BMI)≥28 kg/m2, left ventricular ejection fraction<55%, preoperative serum creatinine (Scr)≥110 μmol/L, preoperative estimated glomerular filtration rate (eGFR), Cleveland score and intraoperative cardiopulmonary bypass time, intraoperative infusion of red blood cells, intraoperative infusion of plasma, postoperative mechanical ventilation time≥40 h and other indicators were significantly different between the two groups (P<0.05); multivariate logistic regression analysis showed that there was significant difference between the two groups in age (OR=1.040, 95% CI 1.017–1.064, P=0.001), BMI≥28 kg/m2 (OR=2.335, 95%CI 1.093–4.990, P=0.029), eGFR<90 mL/(min·1.73 m2) (OR=2.044, 95%CI 1.082–3.863, P=0.028), preoperative Cleveland score (OR=1.300, 95%CI 1.054–1.604, P=0.014) and intraoperative cardiopulmonary bypass time (OR=1.009, 95%CI 1.002–1.017, P=0.014).ConclusionThe incidence of AKI is higher after DHCA. Patients with postoperative AKI have longer hospital stay and higher risk of hospitalization death. The age of patients, BMI≥28 kg/m2, eGFR<90 mL/(min·1.73) m2, Cleveland score, intraoperative extracorporeal circulation time are independent risk factors for AKI after DHCA.

原发性心脏肿瘤的外科治疗

目的 总结原发性心脏肿瘤的外科治疗经验，以提高手术疗效。 方法 回顾性分析1980年6月至2008年12月中国医科大学附属第一医院收治的263例原发性心脏肿瘤患者的临床资料，其中男90例，女173例；年龄10～79岁（41±13岁）。良性肿瘤241例，其中良性粘液瘤240例，纤维瘤1例；恶性肿瘤22例，其中恶性粘液瘤7例，恶性间皮瘤4例，血管肉瘤5例，横纹肌肉瘤1例，肺动脉内膜肉瘤1例，平滑肌肉瘤1例，炎症性恶性纤维组织细胞瘤1例，恶性淋巴瘤1例，滑膜肉瘤1例。手术完整摘除肿瘤252例（恶性肿瘤11例），局部切除肿瘤5例（均为恶性肿瘤），开胸探查取病理活组织检查6例（均为恶性肿瘤）。同期行冠状动脉旁路移植术（CABG）5例，二尖瓣置换术5例，二尖瓣成形术4例，三尖瓣成形术9例，三尖瓣生物瓣置换术1例，主动脉根部及肺动脉成形术1例，肺动脉瓣置换术1例，肺动脉主干及左右肺动脉人工血管加肺动脉瓣置换术1例，肺动脉切开取栓术1例，经股动脉取瘤栓术5例。 结果 围术期死亡7例（良性粘液瘤6例、恶性粘液瘤1例），其中术中不能停体外循环2例，术后发生低心排血量、心室颤动3例，呼吸、循环衰竭1例，大面积脑出血1例；其余患者无并发症发生。随访247例（良性肿瘤229例，恶性肿瘤18例），随访时间3个月～28年，失访9例（良性肿瘤6例、恶性肿瘤3例）。随访期间良性粘液瘤复发4例，均再次手术治疗；良性肿瘤患者死亡13例（心源性猝死6例、脑卒中2例、肺癌1例、不明原因4例），其余216例均生存。随访期间恶性肿瘤患者死亡15例，术后生存时间为1～4年，死于肿瘤复发或转移11例，心力衰竭和恶病质各2例。 结论 原发性心脏肿瘤一经确诊应尽早手术治疗，良性肿瘤手术效果好，恶性肿瘤术中应尽量切除肿瘤。