动脉转位术的临床应用

目的 总结动脉转位术(arterial switch operation，ASO)治疗完全型大动脉转位(transposition of the great arteries，TGA)和右心室双出口伴肺动脉瓣下室间隔缺损(VSD)的临床经验。方法 采用ASO治疗小儿先天性心脏病32例，其中TGA22例，伴室间隔完整型(intact ventricular septum，IVS)9例，伴VSDl3例；右心室双出口伴肺动脉瓣下VSD(Taussig—Bing)10例。结果TGA／IVS9例中死亡1例，TGA／VSD13例中死亡4例，Taussig-Bing10例死亡3例，总手术死亡率25％(8／32)。术后随访3个月～2年，所有患者紫绀消失，活动能力明显增强。1例Taussig—Bing术前二尖瓣轻-中度反流，术后仍为中度反流；2例TGA主动脉和肺动脉瓣上狭窄，压差40mmHg(1kPa=7．5mmHg)，1例肺动脉瓣下狭窄和残余VSD，3个月后再次手术治愈。结论 ASO已广泛应用于TGA的纠治，手术效果满意；应用于右心室双出口肺动脉瓣下VSD的早期纠治，不但可防止发生肺血管阻塞性病变，而且避免了心内修补左心室流出道梗阻的远期并发症。     

Left ventricle is better suited as pulmonary ventricle in simple transposition with severe pulmonary hypertension

BACKGROUND: The conventional treatment of transposition of great arteries with prepared left ventricle is an arterial switch operation. This, in our experience, does not hold for patients with transposition of great arteries with intact ventricular septum where the left ventricle continues to be prepared secondary to severe pulmonary arterial hypertension without an immediately reversible cause. METHODS: Ten infants with D-transposition of the great arteries with essentially intact interventricular septum and severe pulmonary arterial hypertension underwent surgical treatment. Age ranged from 3 to 6 months (mean, 4.2 months). One of these patients had a large ductus with left to right shunting but the others had no intra- or extracardiac shunt to account for their pulmonary hypertension. All 10 had "prepared" left ventricles. The first 4 children underwent an arterial switch operation. Uneventful surgery was followed by prolonged ventilator dependence in all 4 with occurrence of severe pulmonary arterial hypertension every time weaning from ventilator was attempted. This was accompanied by metabolic acidosis and features of right heart failure. Only 1 patient with large ductus could be extubated and discharged from hospital. Subsequently, the other 6 infants underwent a Senning repair. RESULTS: There was no early mortality. All patients were separated from mechanical ventilation within 48 hours of surgery without blood gas derangement or heart failure despite elevated pulmonary artery pressure in all. The child with the arterial switch operation has pulmonary artery pressure of 50% systemic 4 years following repair; although among the Senning group, 2 patients continue to have pulmonary artery pressure more than 60% of systemic and 4 have normal pulmonary artery pressure at a mean follow-up of 1 year. CONCLUSIONS: Atrial level repairs seem to perform better than arterial level repairs in children having TGA with persistent pulmonary artery hypertension without a correctable cause. Better tolerance of pulmonary arterial hypertension in this group is probably consequent to the superior ability of the left ventricle to tolerate a pressure load in the early postoperative period.     

Long-term result of arterial switch operation for corrected transposition of the great arteries or double inlet left ventricle

The purpose of this study is to analyze the operative maneuver and long term outcome of the arterial switch operation (ASO) for congenitally corrected transposition of the great arteries (c-TGA) or double inlet left ventricle (DILV). Since October 1977, 221 patients had undergone ASO in National Cardiovascular Center, Japan. Of these, 8 patients underwent ASO as a part of double switch operation (DSO) for c-TGA, and 1 patient underwent ASO and ventricular septation for the DILV with a rudimentary right ventricle simultaneously. We retrospectively reviewed these 9 patients. Six patients had a past history of the pulmonary artery banding. Age at the time of ASO ranged from 6 months to 5 years (median 3 year). As a reconstruction of the pulmonary artery at the time of ASO, Lecompte maneuver was performed in 7 patients, and original Jatene procedure was performed in 2. Coronary transfer was done as usual in all patients. There was no early death, and 1 patient died 1 year after the operation due to chronic heart failure. Late complication related to the ASO was pulmonary artery stenosis (1 patient after DSO) and aortic regurgitation (1 patient after ventricular septation).     

影响动脉转位术手术死亡的危险因素分析

目的探讨动脉转位术(arterial switch operation,ASO)手术死亡的危险因素,以提高手术成功率,降低手术死亡率。方法2001年1月1日至2007年12月31日期间在阜外心血管病医院行ASO208例,男157例,女51例;年龄6 h至17岁,中位年龄90 d;体重3～43 kg,中位体重5 kg。大动脉转位(TGA)/室间隔缺损(VSD)127例,TGA/室间隔完整(IVS)或合并VSD直径5 mm81例。冠状动脉分布正常(1LCx2R)151例,单冠状动脉畸形15例,壁内走行6例,冠状动脉分布反位36例。收集所有患者术前、术中和术后的临床资料,建立数据库,行单因素和logistic多因素分析影响ASO手术死亡的危险因素。结果围术期死亡24例(11.54%),死于术后感染合并多器官功能衰竭12例,低心排血量综合征10例,肺动脉高压危象1例,脑部并发症1例。其中2001～2005年手术死亡20例(18.30%),2006～2007年手术死亡4例(4.00%),后者手术死亡率较前者明显降低(P0.05)。单因素分析结果:死亡患者体外循环时间明显长于生存患者(236±93 min vs.198±50 min,P=0.002),冠状动脉分布异常(33.3%vs.6.5%,P=0.000)及术中发生冠状动脉事件(33.3%vs.2.2%,P=0.000)的比率明显高于生存患者;logistic回归多因素分析结果:手术年代早(OR=7.463,P=0.003)、冠状动脉分布异常(OR=6.303,P=0.005)及术中发生冠状动脉事件(OR=17.312,P=0.000)是ASO围术期死亡的主要危险因子。结论ASO有明显的学习曲线,手术年代早、冠状动脉分布异常、术中对冠状动脉处理不当是影响ASO死亡的主要危险因子。     

动脉调转分期手术中左室训练的临床应用

目的 总结动脉调转分期手术中左室训练的临床经验。方法 2001年4月至2004年5月，为7例大动脉转位病儿做左室训练术。左室训练包括体肺动脉分流和肺动脉环缩两项操作。全组肺动脉收缩压，动脉收缩压值，从术前的0．34增加至0．76。2例需要同期做原发房间隔切除，1例需要二次校正肺动脉环缩。结果 全组无手术死亡，4例在术后2周左右顺利完成二期动脉调转术，治愈出院。1例术后3个月再入院，做二期动脉调转，术后死于肝功能衰竭。2例因术后并发症未作二期手术。结论 左室训练为年龄超过新生儿期的单纯大动脉转位病儿做动脉调转术提供了必要的准备；房间交通对左室训练有重要作用；快速二期手术可获得良好的临床结果。     

Arterial switch with internal pulmonary artery banding. A new palliation for TGA and VSD in complex cases.

In most cases, one stage repair by arterial switch operation (ASO) is the optimal treatment for neonates with transposition of the great arteries (TGA). Nevertheless, a ventricular septal defect (VSD) associated with TGA remains a major risk factor for early death and reoperation after complete repair in neonates with complex anatomy. A new palliative approach for such specific cases is proposed. An internal pulmonary artery banding (IPAB), as that already used to palliate other cardiac malformations, is performed in association with ASO instead of VSD closure. At the end of ASO, a circular polytetrafluorethylene (PTFE) patch with a 4-mm central hole is oversewn into the neo-pulmonary trunk. We adopted this method in a 17-day-old boy with TGA, VSD, hypoplastic tricuspid valve and diminutive right ventricle. After the operation the child thrived and was doing well without medication. Satisfactory growth of the right ventricle and tricuspid valve was observed by echocardiography during the following months. The patient successfully underwent VSD closure and IPAB removal 2 years after the first procedure. ASO with IPAB could be appropriate in all forms of TGA and VSD in which VSD closure appears too challenging in the neonatal period and in patients with uncertain suitability for biventricular repair. We preferred to use IPAB instead of classic PAB in order to reduce the risk of pulmonary valve damage, pulmonary artery distortion, and above all pulmonary artery dilatation and related coronary compression. In the presented case the strategy as well as IPAB worked according to our expectations.     

完全性大动脉错位中的冠状动脉畸形分类及其处理

完全性大动脉错位是一种常见的紫绀型先天性心脏畸形，如不治疗婴儿早期即死亡。目前临床上对无肺动脉瓣狭窄的完全性大动脉错位患者采用动脉转位术纠治，但如合并冠状动脉畸形，手术的难度和死亡率就会增高。因此，处理好合并的冠状动脉畸形是手术成功的关键。现就冠状动脉畸形的分类、手术方法及处理结果进行综述。     

Arterial Switch Operation with Coronary Arteries from a Single Sinus in Infants

Abstract Background: The implantation of a coronary artery (CA) is critical for the arterial switch operation (ASO) done to treat complete transposition of the great arteries (TGA). Coronary artery abnormalities are risk factors for both early and late mortality after surgery. In this study, the methodology and effects of ASO surgery with coronary arteries from a single sinus were evaluated. Methods and Results: From March 1999 to June 2006, 31 patients were treated with ASO with coronary arteries from a single sinus in our hospital. They aged 11 hours ? 16 months (2.8 ± 3.9 months) and weighted 2.3 ?7.8Kg (3.1 ± 2.5Kg). 27 cases had TGA and a ventricular septal defect (VSD), and 4 had TGA and an intact ventricular septum (IVS). During surgery, a CA button was implanted in the new proximal aorta with “trapdoor” technique or by inverting 90 degrees dorsally; pericardium or arterial augmentation was implanted at the base of the new major artery. The mortality rate after surgery was 25.8%. After 2‐5 years of follow‐up, 2 cases with residual shunting recovered spontaneously, 2 cases had residual pulmonary artery obstruction (30‐56 mmHg), and none of the patients had any significant changes in myocardial ischemia. Conclusion: The implantation of an abnormal coronary artery is practical and feasible; it can reduce both the occurrence of twisting and deforming in the coronary artery after implantation, as well as myocardial ischemia after surgery. Thus, this could improve the surgical success and cure rates.     

Surgical management of transposition of the great arteries

From January 1983 through December 1991 470 patients underwent an arterial switch operation (ASO). 281 (59.7%) had transposition of the great arteries (TGA) with intact ventricular septum (IVS) and 189 (40.3%) had a ventricular septal defect (VSD). The overall hospital mortality for ASO was 6.3%, but 0.6% (1/155) in the last 155 consecutive patients with TGA/IVS. Of 9 late deaths (1.9%) 5 were due to coronary artery obstruction. 2 were found related to pulmonary vascular obstructive disease and 2 were unrelated to ASO. Cardiac catheterization in 244 late survivors revealed postoperative, supravalvular pulmonary stenosis in 2% of patients. Residual shunts on ventricular levels greater than QP/QS=1.5/1.0 were measured in 4 patients. No regional wall motion abnormalities were detected and left ventricular function appeared normal in all patients 2 years after surgery. One year after surgery 98% of patients presented in sinus rhythm. The favourable early and midterm results of the ASO as a primary operation continue to make it the preferred approach for the neonate with TGA/IVS and TGA/VSD whenever possible. The rapid two-stage approach (preliminary pulmonary artery banding and shunt followed by ASO after 7 days) is applicable for older patients with TGA/IVS.     

Two-stage repair of the transposition of great arteries with interruption/coarctation of the aorta

We report on 10 patients who underwent two-stage repair of transposition of the great arteries (TGA) with interruption (IAA) or coarctation (CoA) of the aorta. First, an operation for aortic arch reconstruction was performed: Blalock-Park with pulmonary artery banding (PAB) for IAA (5 patients), subclavian flap with PAB for CoA (4 patients) and end-to-end anastomosis without PAB (1 patient). All survived the first operation and had no significant pressure gradient with good growth of the ascending aorta, except for the 1 case without PAB. Half of the 8 patients who underwent PAB developed migration of the PAB. The arterial switch operation (ASO) was performed 0.7-12.6 (5.6+/-4.7) months after the first surgery. One patient with an abnormal coronary artery tract was lost after ASO. Five developed pulmonary artery stenosis and 1 developed supra-aortic stenosis late after ASO. Two patients need reoperation, 1 for supra-aortic stenosis, and the other for reCoA. Two-stage repair for TGA with IAA/CoA is still a useful method with a good operative result. However, strict follow-up is necessary because of the high frequency of late morbidity.     

影响大动脉转位术死亡率的危险因素分析

目的分析大动脉转位术（arterial switch operation，ASO）治疗完全性大动脉错位（complete transposition of the great arteries，TGA）的手术结果，探讨影响死亡率的危险因素。方法收集2003年1月至2004年12月期间，我院对67例TGA患者施行ASO的临床资料，包括住院病历、超声心动图和手术记录。应用x^2检验和logistic多变量回归分析对患者的手术年龄、体重、诊断、冠状动脉分型、体外循环时间、主动脉阻断时间、停循环时间、术后呼吸机辅助时间、延迟关胸等因素进行统计分析，分析影响死亡率的危险因素。结果施行ASO的67例TGA患者中，围手术期死亡5例（7．5％）。单变量分析结果表明，影响ASO死亡率相关的危险因素有：年龄（P=0．004）、体重（P=0．042）、冠状动脉分型（P=0．006）和体外循环时间（P=0．048）。伴有室间隔缺损（ventricular septal defect，VSD）的患者（TGA／VSD）术后住心脏监护室（CICU）时间（P=0．004）和术后住院时间（P=0．007）明显长于室间隔完整（intact ventricular septum，IVS）的患者（TGA／IVS）。logistic多变量回归分析结果表明，患者手术时年龄（P=0．012）、冠状动脉畸形（P=0．001）和较长的体外循环时间（P=0．002）是影响ASO死亡率的危险因素。结论对TGA患者及时施行ASO可获得良好的临床效果，患者手术时年龄、冠状动脉畸形和较长的体外循环时间是影响死亡率的危险因素。     

动脉调转术不同年龄手术效果的对比——附142例错过最佳手术年龄者治疗经验

目的 探讨大动脉转位(TGA)病儿接受动脉调转手术(ASO)时年龄对手术效果的影响.方法 2000年5月至2008年9月,264例rIGA病儿行ASO.男194例,女70例;年龄·l d一19岁.其中室隔完整型TCA('rcAJrvs)84例;年龄≤2周28例,>2周56例.伴室隔缺损TCA(TCAJVSO)130例,Tams-ing-B~畸形(TBA)50例,其中≤6月94例,>6月86例.符合最佳手术年龄(≤2周TCA/IVS,≤6个月TGA/IVSD、TBA)者122例,错过最佳手术年龄者(>2周TCA/IVS,>6个月TGA/VSD、TBA)142例.手术方法:18例>2周TGA/IVS先期行左室训练,4例>6个月TGA/VSD先期行肺动脉环缩,余者均一期行ASO,同期矫治合并畸形.结果 全组手术死亡26例,病死率9.85%.平均随访(29.5±7.6)个月,2例分别于术后2个月和1.5年猝死,l例术后1.5年因肺动脉吻合口狭窄再次手术,余者心功能明显改善.无死亡和远期并发症发生.符合最佳手术年龄者病死率13.1l%;错过最佳手术年龄者病死率7.04%.2006年后(共154例),TGA病儿病死率由19.09%降至3.25%(P<0.05),符合最佳手术年龄者由22.64%降至5.80%(P<0.05),错过最佳手术年龄者由15.79%降至1.18%(P<0.05).结论 ASO应用于错过最佳手术年龄TCG者亦可取得满意效果.     

大动脉调转术后吻合口梗阻的影响因素

目的 分析大动脉调转术后主动脉和肺动脉吻合口梗阻的影响因素.方法 1999年12月至2007年12月,行大动脉调转术(ASO)331例,术后生存288例.228例平均随访(20.4±18.6)个月,随访率79.2%.根据ASO术后超声报告所测主、肺动脉吻合口流速的大小,对完全性大血管错位室间隔完整型(TGA/IVS),完全性大血管错位伴窒间隔缺损(TGA/VSD),右室双出口伴肺动脉瓣下室间隔缺损、肺动脉高压(Taussig-Bing)和快速二期大动脉调转术(Stage-Switch)的随访资料分别分析其主、肺动脉吻合口的梗阻情况.对ASO手术后的各类疾病的主动脉和肺动脉吻合口流速,按流速<2 m/s,2～3 m/s,>3 m/s的病例百分数进行统计分析.结果 4种疾病分类的随访结果示主动脉吻合口流速差异有统计学意义(P=0.034),肺动脉吻合口流速差异无统计学意义(P>0.05).肺动脉吻合口流速增快发生率比主动脉吻合口高.Taussig-Bing组发生率高,Stage-Switch组发生率低.手术时病婴年龄越小(≤12 d),主动脉、肺动脉吻合口流速越易增快.随访时间延长,流速增快的发生率会逐渐提高.全组6例由于左、右流出道梗阻而再次手术.结论 ASO术后,肺动脉吻合口梗阻发生率较高.ASO术后必须定期随访,注意观测吻合口的生长情况.     

107例大动脉转换术的冠状动脉解剖类型和治疗结果

目的总结分析近年来107例大动脉转换术的冠状动脉解剖分类和手术结果，以进一步提高大动脉转换术的手术成功率。方法2000年1月至2004年9月，采用大动脉转换术纠治完全性大血管错位室隔完整型（TGA／IVS）44例，完全性大血管错位伴室间隔缺损（TGA/VSD）38例，右室双出口伴肺动脉瓣下室间隔缺损、肺动脉高压（Taussig-Bing）25例，其中冠状动脉畸形28例，占全组28％。结果大动脉转换术107例中死亡17例，总病死率15．88％。其中TGA/IVS组死亡4例，病死率9．02％；TGA／VSD组死亡8例，病死率21．05％；Taussig-Bing组死亡5例，病死率20．00％。90例术后随访6个月～4年，VSD残余漏3例，2例分别在术后1个月和2个月自愈，1例同时伴右室流出道梗阻，术后3个月再次手术治愈。肺动脉瓣上狭窄2例尚在随访中。其余病儿活动良好，无任何心肌缺血表现。结论冠状动脉畸形的变异很多，分型比较困难，Leiden方法简单，易掌握。Taussig-Bing的冠状动脉畸形发生率较高，TGA／VSD的冠状动脉畸形达40％左右，进行Switch手术时应注意。     

Results of arterial switch operation for transposition of great arteries with regard to coronary pattern

One of the factors determing the postoperative results of arterial switch operation (ASO) for complete transposition of great arteries (TGA) is coronary event (CE). We analyzed the risk factors of CE after ASO in patients whose coronary patterns excluding Shaher type 1. The subjects were 44 patients operated from 1994 to 2007. As for the coronary reconstructive technique, procedures by Mee or Aubert were conducted on patients with Shaher 5A intramural type. The conventional technique was conducted on other patients, with or without trapdoor technique. In all patients, the pulmonary artery was reconstructed mainly with autopericardium using Lecompt maneuver. The mean observation period was 4.0 +/- 3.1 years, and the number of patients showing CE was 14 (32%) at 1.6 years after surgery on the average. The risk factors of CE and the operative procedures were discussed.     

Arterial switch operation with in situ coronary reallocation for transposition of great arteries with single coronary artery.

OBJECTIVES: Transposition of great arteries (TGA) with single coronary artery pattern is one of the high-risk groups for arterial switch operation (ASO). Any traction or kinking during coronary transfer can lead to a fatal outcome. With increase in experience, surgical results improved, but it did not completely eliminate the risks of coronary translocation. Many techniques have been described for transfer of single coronary and each one has its own merits and problems. We here in describe a new technique of in situ coronary reallocation during ASO for TGA with single coronary and also report the early and mid-term results with this new technique. METHODS: From September 1988 to June 2002, five consecutive cases of TGA with single coronary artery were operated employing this new technique. Their age ranged from 16 days to 9 months. ASO was done by transecting the great arteries just above the commissures. For coronary reallocation, hockey stick-shaped incisions were made in the facing sinuses of the proximal aorta and the pulmonary artery. These flaps were sutured in such a way that the coronary ostium was committed to the neo-aorta with the rest of surgical procedure done in the usual manner. RESULTS: All five patients had ASO. Additionally, four patients had closure of an associated ventricular septal defect and one patient had repair of the coarctation of the aorta. There was no in hospital mortality. All patients had follow-up echocardiograms at regular intervals, which showed no significant right or left ventricular outflow obstruction, no regional wall motion abnormalities and no neo-aortic or neo-pulmonary regurgitation. Three of five patients had cardiac catheterization and angiocardiography, which showed normal coronary arteries with no obstructive lesions and no neo-aortic regurgitation. Their follow up ranged from 5 to 50 months and there was no late mortality. CONCLUSIONS: This new coronary reallocation technique avoids problems related to coronary translocation such as traction and kinking. It spares the need for dissection of proximal coronary artery and its branches, and thereby eliminates the risk of development of fibrosis and stenosis. The same technique can be used regardless of the sinus of origin of the coronary artery. It is a reliable and a reproducible technique. The early and mid-term results appear excellent in this series.     

Midterm results after arterial switch operation for transposition of the great arteries: a single centre experience

ABSTRACT: BACKGROUND: The arterial switch operation (ASO) has become the surgical approach of choice for d-transposition of the great arteries (d-TGA). There is, however an increased incidence of midterm and longterm adverse sequelae in some survivors. In order to evaluate operative risk and midterm outcome in this population, we reviewed patients who underwent ASO for TGA at our centre. METHODS: In this retrospective study 52 consecutive patients with TGA who underwent ASO between 04/1991 and 12/1999 were included. To analyze the predictors for mortality and adverse events (coronary stenoses, distortion of the pulmonary arteries, dilatation of the neoaortic root, and aortic regurgitation), a multivariate analysis was performed. The follow-up time was ranged from 1--10 years (mean 5 years, cumulative 260 patient-years). RESULTS: All over mortality rate was 15.4 % and was only observed in the early postoperative period till 1994. The predictors for poor operative survival were low APGAR-score, older age at surgery, and necessity of associated surgical procedures. Late re-operations were necessary in 6 patients (13.6 %) and included a pulmonary artery patch enlargement due to supravalvular stenosis (n = 3), coronary revascularisation due to coronary stenosis in a coronary anatomy type E, aortic valve replacement due to neoaortic valve regurgitation (n = 2), and patch-plasty of a pulmonary vein due to obstruction (n = 1). The dilatation of neoaortic root was not observed in the follow up. CONCLUSIONS: ASO remains the procedure of choice for TGA with acceptable early and late outcome in terms of overall survival and freedom of reoperation. Although ASO is often complex and may be associated with morbidity, most patients survived without major complications even in a small centre.     

Transposition of the great arteries and intact ventricular septum: anatomical repair in the neonate

Fourteen neonates 18 hours to 32 days old with transposition of the great arteries (TGA) and virtually intact ventricular septum (IVS) underwent arterial switch operations under deep hypothermic circulatory arrest. Preoperative left ventricular to right ventricular peak systolic pressure ratios ranged from 0.7 to 1.0 (mean, 0.92), and the echocardiogram showed a centrally positioned ventricular septum in 10 patients and a rightward displaced ventricular septum in 4. One patient died twelve hours after operation. Postoperative complications included bleeding from the left coronary artery-pulmonary artery anastomosis (1 patient), stenosis of the pulmonary artery-aorta anastomosis requiring reoperation (2 patients), transient ST segment and T wave abnormalities consistent with ischemia (3), and development of pathological Q waves suggestive of clinically silent infarction (2). The capacity of the left ventricle in a neonate to effectively take over the systemic circulation was clearly demonstrated. A longer follow-up period is needed to assess late ventricular function, coronary ostial growth, growth of the aorta-pulmonary artery anastomosis, late aortic valve (anatomical pulmonary valve) function before definitive recommendations about the superiority of the arterial switch operation in neonates with TGA plus IVS can be formulated.     

169例动脉调转手术治疗大动脉转位的早、中期结果

目的 探讨大动脉调转手术(ASO)治疗完全性大动脉转位(TGA)的早、中期结果,分析其随访死亡、术后主动脉瓣反流及肺动脉狭窄的危险因素.方法 2004年1月至2007年12月,169例行动脉调转术病儿入选,其中男129例,女40例,平均年龄(11.7±26.3)个月.病儿分两组:Ⅰ组为室间隔完整组(56例),Ⅱ组为室间隔缺损组(113例).所有术后生存病儿均进行超声随访,平均随访时间(27.7±14.6)个月.危险因素采用Logistic回归模型分析.结果 全组住院死亡19例(11.24%),两组间差异无统计学意义.随着整体治疗水平的提高,住院病死率由2004年的16.67%下降到2007年的3.92%.1、3及5年生存率分别为94.00%、91.33%及91.33%,两组间差异无统计学意义.Logistic回归分析发现,ASO术后随访死亡的危险因素为手术年龄大于6个月;术后主动脉瓣反流的危险因素为合并室间隔缺损、年龄大于6个月、术后新主动脉瓣Z值>1;术后肺动脉狭窄的危险因素为手术年龄小于1个月和肺动脉采用补片成形.结论 ASO手术具有良好的早、中期结果,是治疗完全性大动脉转位的理想术式.TGA病儿应该尽早手术治疗,手术年龄大于6个月是随访死亡及主动脉瓣反流的重要危险因素;新主动脉根部与主动脉远端不匹配是术后主动脉瓣反流的危险因素;病儿的生长发育与肺动脉成形材料无生长特性的矛盾是导致术后肺动脉狭窄的危险因素.     

大于6月龄伴室间隔缺损并重度肺动脉高压心室大动脉连接异常的大动脉调转术

目的 总结大动脉调转术(ASO)根治>6月龄伴室间隔缺损(VSD)并重度肺动脉高压(PH)心室大动脉连接异常者手术疗效,探讨ASO适应证.方法 2000年5月至2008年10月治疗86例VSD并PH的心室大动脉连接异常者.男51例,女35例;年龄7月龄～19岁,平均(24±22)月龄;体重2.6～48.0 kg,平均(9.0±7.0)kg.肺动脉平均压50.0～97.0(64.9±13.0)mm Hg,肺血管阻力46.0～1261.9(324.0±249.0)dyn·s·cm ~(-5).手术在全麻低温(18～22℃)低流量(50 ml·kg~(-1)·min~(-1)体外循环下完成,同期矫治合并畸形.结果 手术死亡率7.0%(6/86例),均为2005年12月以前病例(40例),其中仅1例7岁病儿死因与PH有关;2006年1月以后连续46例无死亡.随访1～84个月,80例生存.2例(2岁及13岁)分别于术后2个月和1年半不明原因猝死,余78例心功能明显改善,无再手术及并发症.结论 年龄>6月龄并重度PH的TGA/VSD或TBA,如一般状况尚好,经皮血氧饱和度>0.60,X线胸片示两肺血尚多,肺血管阻力<1200 dyn·8·cm~(-5),ASO根治仍可取得满意效果,扩大了根治性ASO适应证.