Modified “in situ” arch replacement with an integrative frozen elephant trunk device for acute type A aortic dissection

BackgroundTotal arch replacement (TAR) and frozen elephant trunk (FET) has been proposed as the primary arch repair method for acute type A aortic dissection (aTAAD). We introduce a modified “in situ” arch replacement with an integrative FET device for aTAAD.MethodsFrom January 2018 to December 2019, 507 aTAAD patients from Nanjing Drum Tower Hospital received surgical therapy; among them, 57 patients with modified island total arch replacement (MiTAR) and 138 patients with TAR were enrolled. Marfan syndrome, primary intimal tears located in the large curve of aortic arch +/− or supra-arch vessels and dilated aortic arch (≥45 mm) were contraindications for MiTAR. MiTAR involves two steps: first, insert a FET device into the descending aorta during the hypothermic circulation arrest period; second, anastomose the remaining “island” arch with the prosthetic vessel and the proximal part of the FET.ResultsMiTAR patients were older than those receiving TAR (52.1 vs. 48.9 years; P=0.078), but their baseline demographics and manifestations of organ ischaemia were nearly the same. The times of cardiopulmonary bypass (CPB), aortic clamp and hypothermic circulation arrest were significantly shorter with MiTAR (209.3 vs. 267.1 minutes, P=0.000; 147.9 vs. 190.0 minutes, P=0.000; 34.0 vs. 39.4 minutes, P=0.003, respectively). The volumes of intraoperative transfusions of red blood cells (RBCs), fresh frozen plasma (FFP), platelets and cryoprecipitates were significantly lower in MiTAR (5.9 vs. 8.5 units, P=0.000; 758.3 vs. 930.4, P=0.000; 12.5 vs. 17.5 mL, P=0.000; 9.4 vs. 16.6 units, P=0.000). The 30-day mortality was 7.0% (4/57) for MiTAR and 11.6% (16/138) for TAR. One patient died and no patient received reintervention during the follow-up period, while the size of several levels of aorta showed a decreasing trend.ConclusionsMiTAR is a simplified approach to TAR that reduces the surgical trauma while achieving aortic reshaping effects.     

Stanford A型主动脉夹层的外科治疗

目的 总结A型主动脉夹层外科治疗经验,探讨治疗A型主动脉夹层安全有效的术式和方法.方法 我院2008年1月至2013年11月对40例A型主动脉夹层患者予以外科治疗.Bentall（带瓣人造血管替代升主动脉根部和主动脉瓣膜,并移植左右冠状动脉）手术17例,其中10例同期行主动脉弓部替换＋降主动脉象鼻支架置入术;单纯升主动脉人工血管置换术8例;窦部成形＋主动脉瓣交界悬吊术6例,窦部替换＋主动脉瓣成形＋升主动脉半弓替换5例;升主动脉人工血管置换术＋主动脉全弓替换4例.采用深低温停循环技术（DHCA）12例,其余为浅中低温体外循环.采用冷血心脏停搏液灌注12例,组氨酸-色氨酸-酮戊二酸（HTK）停搏液灌注7例,冷晶体心脏停搏液21例.采用改良超滤技术19例.结果 手术死亡1例,围术期死亡4例,死亡率12.5％（5/40）,余均痊愈出院.结论 细化A型主动脉夹层的分型有利于制订个体化手术方案.术中止血彻底及心肌、脑保护确切可提高手术成功率.     

Application of prosthesis eversion method for ascending aorta replacement guarantees better clinical outcomes of type A acute aortic dissection surgery

BackgroundThe advantages of prosthesis eversion method in patients diagnosed with Stanford type A acute aortic dissection (AAD) undergoing ascending aorta replacement (AAR) is unknown. This research is designed to explore it.MethodsWe retrospectively analyzed the data of a total of 283 patients diagnosed with type A aortic dissection that underwent surgery in Renmin Hospital of Wuhan University from March, 2006 to April, 2020. Eighty-eight patients underwent surgical repair with traditional continuous suture technique, and 195 patients received prosthesis eversion. Baseline data, intra-operative data and early-stage clinical results were collected and statistically analyzed.ResultsBaseline data were similar except for age, incidence of hyperlipidemia and taking ACEI/ARB drugs (P<0.05). Cardiopulmonary bypass time, cross-clamp time, circulation arrest time, hemostasis time and total operation time in the traditional method group were far longer than in the prothesis eversion group (P<0.01). The operative mortality was similar (P>0.01). Post-operatively, there was no statistically significant difference in the mean ventilation time, mortality, incidence of re-exploration, tracheostomy, paraplegia, long-term coma and stroke between the two groups (P>0.05). Patients in the traditional method group had a longer duration stay in ICU and hospital than patients in the prosthesis eversion group (P<0.05). Patients in the traditional method group received more red blood cells (RBC) (P<0.01), plasma (P<0.05), fibrinogen (P<0.01) and albumin (P<0.05) transfusions, and CoSeal™ surgical sealant (P<0.05) than patients in the prosthesis eversion group.ConclusionsOur experience and statistical analysis showed prosthesis eversion method to have some advantage in reducing blood loss and improving clinical results compared with repair with continuous suture. This technique is both simple to learn and perform.     

Predictors and in-hospital outcomes of preoperative acute kidney injury in patients with type A acute aortic dissection

Background Acute kidney injury (AKI) is common after surgery for acute aortic dissection (AAD) and increases in-hospital and long-term mortality. However, few data exist on the clinical and prognostic relevance of early preoperative AKI in patients with type A AAD. We aimed to determine the incidence and predictors of preoperative AKI and the impact of AKI on in-hospital outcomes in patients with type A AAD. Methods From May 2009 to June 2014, we retrospectively enrolled 178 patients admitted to our hospital within 48 h from symptom onset and receiving open surgery for type A AAD. The patients were divided into no AKI and AKI groups and staged with AKI severity according to the KDIGO criteria before surgery. Results AKI occurred in 41 patients (23.0%). The incidence of in-hospital complications was significantly higher in patients with preoperative AKI compared to no AKI (41.5% vs. 9.5%, P < 0.001), including renal infarction (7.3% vs. 0, P = 0.012), and it increased with AKI severity (P_trend < 0.001). Patients with AKI had higher in-hospital mortality compared with patients without AKI, although no significant difference was found (14.6% vs. 5.1%, P = 0.079). Multivariate analysis indicated that male gender, diastolic blood pressure on admission and bilateral renal artery involvement were independent predictors of preoperative AKI in patients with type A AAD. Conclusions Early AKI before surgery was common in patients with type A AAD, and was associated with increased in-hospital complications. Male gender, diastolic blood pressure on admission and bilateral renal artery involvement were major predictors for preoperative AKI.     

孙氏手术与联合三分支支架血管术中置入治疗急性Stanford A型主动脉夹层对比

目的 探讨孙氏手术、联合三分支支架血管术中置入两手术方式治疗急性Stanford A型主动脉夹层的疗效.方法 2011年1月至2013年1月我院收治的急性Stanford A型主动脉夹层患者,以孙立忠教授主动脉细化分型中AC型为入选标准,选取患者24例.孙氏手术组患者12例,单纯行升主动脉及全弓替换加支架“象鼻”手术9例,同期主动脉根部替换手术（Bentall术）2例,主动脉瓣成形1例.联合三分支支架血管术中置入组患者12例,单纯三分支支架术中置入3例,同期升主动脉替换8例,主动脉根部替换手术（Bentall术）1例.出院前、术后3个月、术后每年复查主动脉全程重建CT.结果 孙氏手术组：平均手术时间（10.00±1.60）h,平均体外循环时间（253.33±49.33）min,平均心肌阻断时间（141.41±27.58）min,选择性脑灌注时间（39.67±10.28）min.住院死亡4例,死亡原因：多脏器衰竭2例,术后肾功能衰竭1例,术后呼吸功能衰竭1例.联合三分支支架血管术中置入组：平均手术时间（7.77±2.06）h,平均体外循环时间（168.25±32.05）min,平均心肌阻断时间（79.75±29.54）min,选择性脑灌注时间（24.33±6.53）min.住院死亡2例,死亡原因：术后呼吸功能衰竭死亡1例,1例术后一直未醒,术后第5天少尿,家属放弃治疗.孙氏手术组随访（11.09±6.87）个月,无死亡及需再次手术者.联合三分支支架术中置入组随访（18.40±8.03）个月,术后死亡2例,1例术后1年胸痛发作,心脏彩超提示升主动脉明显增宽,主动脉后壁分离为两层,当即死亡;1例术后2年随访主动脉全程重建CT提示无名动脉近端内漏.结论 孙氏手术和联合三分支支架血管术中置入术是治疗大多数急性Stanford A型主动脉夹层安全有效的方法.作为一种崭新的技术手段,联合三分支支架血管术中置入简化了手术步骤,术后内漏是高危因素,对该种手术方式患者选取应有一定针对性,根据患者信息订制更加个体化支架,并且需要长期随访.     

急性主动脉夹层临床特征的分析

目的：了解当前国人急性主动脉夹层（AAD）的临床特征,以指导疾病诊断及治疗。方法收集2008年1月1日~2011年12月31日国内15家大型心脏中心经影像学检查确诊AAD患者1812例（其中Stanford A型726例,Stanford B型1086例）的临床资料。研究内容包括人口学特征、合并症、临床表现、诊断、治疗、预后及随访等情况,并比较Stanford A型与B型夹层患者之间临床特征的差别。结果患者平均年龄为（51.1±10.9）岁,男女比例约为3.44：1。Stanford B型AAD患者的平均年龄大于A型AAD患者[（53.3±10.1）vs.（47.5±11.2）,P＜0.001],Stanford A型AAD患者男性比例较B型更高（83.7%vs.73.3%,P＜0.001）。B型AAD患者中,86.8%患者合并高血压病,22.0%患者合并动脉粥样硬化,49.5%患者吸烟,均高于A型夹层患者（P＜0.05）。A型AAD患者中,32.5%患者合并马凡综合征,19.1%患者合并主动脉瓣二瓣化畸形,均明显高于B型AAD患者（P＜0.01）。A型AAD患者有疼痛表现占89.4%,其中前胸痛76.3%,迁移痛12.3%;B型AAD患者中背痛占73.8%,腹痛14.2%。76.3% AAD患者采用CT检查确定诊断。75.3% A型AAD患者实施了外科手术治疗,死亡率为15.9%;76.1%B型AAD患者实施了血管内介入治疗,术后发生内漏占7.8%,死亡率为0.6%。Cox住院死亡风险显示,合并高血压病发生AAD的风险度（HR）为2.80、合并马凡综合征HR为1.76。结论与Stanford B型AAD比较,A型AAD患者发病年龄较轻,且男性比例较高。B型AAD患者多合并高血压、动脉粥样硬化和吸烟,A型AAD患者多合并马凡综合征和主动脉瓣二瓣化畸形多见。疼痛是主要的临床表现,CT检查是最常用的确定诊断方法。     

Genetic variants in Chinese patients with sporadic Stanford type A aortic dissection

BackgroundGenetic disorders are strongly associated with aortic disease. However, the identities of genetic mutations in sporadic Stanford type A aortic dissection (STAAD) are not clear. The present study analysed the possible genetic mutations of the known pathogenic genes of aortic disease and the clinical characteristics in patients with sporadic STAAD.MethodsWe analysed genetic mutations in 26 genes that underlie aortic aneurysms and dissections in 100 sporadic STAAD patients and 568 healthy controls after whole-genome sequencing (WGS). Clinical features and in-hospital death were determined in all STAAD patients.ResultsIn total, 60 suspicious pathogenic mutations (56 novel and 4 previously reported) in 19 genes were identified in 50% (50/100) of patients, and 14 patients had more than 1 mutation. The ascending aortic diameter was extended in patients with mutations (49.1±12.3 vs. 43.7±11.2 mm, P=0.023), and the DeBakey type I phenotype was more common in patients with mutations in genes that coded extracellular matrix (ECM) components than in patients with mutations in other genes (96.6% vs. 66.7%, P=0.007). Patients with fibrillin-1 (FBN1) mutations were younger than patients without FBN1 mutations (44.7±11.0 vs. 53.5±12.1, P=0.030). Subgroup analyses revealed an increased risk of in-hospital mortality in mutation carriers (44.4% vs. 10.5%, P=0.029) but only in patients who received conservative treatment.ConclusionsHalf of Chinese patients with a sporadic form of STAAD may carry mutations in known pathogenic genes of aortic disease, and these patients may exhibit distinct clinical features and poor clinical outcomes with the use of conservative treatment.     

Cannulation strategies in type A aortic dissection: a novel insight narrative review

This review highlights vital details that can be easily overlooked and discuss how to identify and fix failed cannulation from another novel insight. Appropriate arterial cannulation strategy during cardiopulmonary bypass (CPB) in Stanford type A aortic dissection (AAD) is highly necessary to reach satisfactory perfusion effects and appreciable clinical outcomes. Despite several previously published reviews on cannulation strategies in AAD, most focus on the advantages and disadvantages by comparing various cannulation strategies. In fact, most of evidence came from retrospective studies. More importantly, however, some important details and novel approaches maybe overlooked due to variety reasons. These overlooked details also make sense in clinical practice. Papers related to cannulation refer to type AAD were retrieved and analyzed from the PubMed and Medline database. The key words such as “aortic dissection”, “cannula”, “cannulation”, “cannulation strategy”, “cerebral perfusion”, “type I aortic dissection” were conducted and analyzed. In addition, we looked at some new and very significant specific perfusion techniques such as anterograde cerebral perfusion combined with retrograde inferior vena caval perfusion (RIVP) and reperfusion via the right carotid artery before surgery. The arterial cannulation site and strategy should be determined individually. Monitoring measures are very necessary in the whole procedure.     

Association of renal cyst and type A acute aortic dissection with hypertension

BackgroundType A acute aortic dissection (TA-AAD) has high mortality, with 50% of patients dying before hospital admission. Hypertension is the most common comorbidity for acute aortic dissection, and effective antihypertensive therapy is still unable to predict the risk of aortic rupture at the medium- and long-term stages. While the presence of renal cyst has been found to increases the risk of thoracic aortic disease, the correlation between renal cyst and TA-AAD with hypertension remains poorly understood. Thus, this study aimed to determine the relationship of renal cyst and TA-AAD with hypertension.MethodsA retrospective analysis was performed in 464 hypertension patients from August 2014 to August 2019. A total of 230 TA-AAD patients were enrolled in the AD with hypertension group (age 53.79±11.31 years, male 90.87%), and matched by age, sex, and hypertension control to 234 patients without TA-AAD who were enrolled in the non-AD with hypertension group. Patients were divided into three subgroups according to the numbers of renal cysts: no renal cyst, single renal cyst, and multiple renal cysts.ResultsIn this study, the AD with hypertension group had significantly more single renal cyst and multiple renal cyst cases than did the non-AD with hypertension group. The mean age of the multiple renal cyst subgroup was significantly older than that of the single renal cyst subgroup (57.25±13.00 vs. 51.57±10.75 years) in the AD with hypertension group. There was significantly different distribution of dissection starting points and dissection ending points across three renal cyst subgroups. Multivariate logistic regression analysis indicated that having no renal cyst significantly decreased the risk of TA-AAD in middle-aged and elderly patents, but showed no correlations with those of younger ages. Single renal cyst status also significantly decreased the risk of TA-AAD in elderly patients [odds ratio (OR) =0.129, 95% confidence interval (CI): 0.029–0.575, P=0.007].ConclusionsRenal cyst status correlates with the risk of TA-AAD with hypertension in middle-aged and elderly patients, and exhibits different degrees of vascular lesion in aortic dissection. We therefore suggest that different antihypertensive standards should be adopted in different renal cyst status to more effectively prevent aortic dissection.     

急性期Standford B型主动脉夹层腔内修复术后早、中期随访结果

目的 评价急性期StanfordB型胸主动脉夹层(TAD)腔内修复术后早、中期手术效果.方法 2009年11月至2012年6月完成80例急性期Stanford B型胸主动脉夹层腔内修复术,手术在发病72 h内完成.手术前行胸腹主动脉夹层强化CT检查,在DSA手术室全麻下切开股动脉进行支架置入术,出院前进行CTA检查,手术后半年至一年内复查CTA.结果 14例患者手术后失去随访.5例术后造影提示有Ⅰ型内漏,4例1年内复查消失或造影剂溢出量明显减少,1例手术后仍有明显Ⅰ型内漏,1年后接受再次支架手术成功.其余支架安装后造影显示破口封闭,无内漏.住院期间死亡2例,1例为高龄患者降主动脉破裂,1例为夹层逆行撕裂至升主动脉后破裂.住院期间发生严重低氧血症8例,急性肾功能不全6例,均经治疗后恢复.结论 急性期Stanford B型胸主动脉夹层进行腔内修复术,术后早期并发症发生率高,中期效果理想.     

The impact of age and sex on in-hospital outcomes in acute type A aortic dissection surgery

BackgroundOlder age and female sex are thought to be risk factors for adverse outcomes after repair of acute type A aortic dissection (AAAD). The aim of this study is to analyze age- and sex-related outcomes in patients undergoing AAAD repair.MethodsRetrospective analysis of patients undergoing emergency AAAD repair. Patients were divided in Group A, patients aged ≥75 years and Group B <75. Intraoperative and postoperative data were compared between groups before and after propensity score matching. Sex differences were analyzed by age group.ResultsBetween January 2006 and December 2018, 638 patients underwent emergency AAAD repair. Group A included 143 patients (22.4%), Group B 495 (77.6%). More patients in Group A presented with circulatory collapse (Penn C 26.6% vs. 9.7%, P=0.001) while Group B presented with circulatory collapse-branch malperfusion (Penn BC 29.3% vs. 15.4% P=0.001). After propensity score matching, Group B patients received more complex aortic root (33.6% vs. 23.2%, P=0.019) and concomitant bypass surgery (12.3% vs. 6.3%, P=0.042). There was no significant difference in in-hospital mortality between age groups (18% vs. 12% P=0.12). In Group B, in-hospital mortality was significantly higher in females (22.2% vs. 8.2%, P=0.028). Differences in mortality disappeared after the age of 75 (18.3% vs. 19.4% P=0.87).ConclusionsMorbidity and mortality are comparable between patients under and over 75 years after AAAD repair. Female patients <75 had higher in-hospital mortality than their male counterparts.     

Echocardiographic detection of intimo-intimal intussusception in a patient with acute Stanford type A aortic dissection

Intimo-intimal intussusception is a very rare and unusual complication of type A dissections, typically noted on TEE exam. It has been reported in a few cases in the cardiothoracic surgical and radiology literature, and even more rarely in the cardiac anesthesia/TEE literature. This uncommon variation occurs in severe, acute, type A dissections when the ascending aortic intima circumferentially strips and detaches from the media and forms a tube-like structure which may either prolapse antegrade into the ascending aortic lumen or retrograde into the left ventricular (LV) outflow tract and LV cavity. Antegrade intussusceptions may be severe enough to partially or completely occlude the ostia of the innominate, left common carotid, and left subclavian arteries producing acute neurologic symptoms. Retrograde intussusceptions may severely impair LV filling in diastole, can worsen aortic insufficiency, mitral regurgitation, as well as produce occlusion of the coronary ostia and acute coronary ischemia. Here, we describe the incidental finding of a retrograde intussusception that was not visualized on computed tomography scan but by intraoperative TEE examination, in a patient with a severe, extensive type A dissection.     

Simultaneous endovascular stent and renal stent placement for acute type B aortic dissection with malperfusion of kidney

Acute aortic dissection frequently causes life-threatening organ ischemia. The optimal therapy for acute type-B aortic dissection is still controversial. Surgery for acute dissection with organ malperfusion is known to carry a high morbidity and mortality; however endovascular treatment is becoming an alternative form of treatment. We report a clinical case of emergency percutaneous thoracal aorta endovascular stenting and renal artery stenting in a patient who had renal malperfusion and acute renal failure due to acute type-B dissection. The present case is a fundamental examples of collaboration between the cardiologist and cardiovascular surgeon in a hybrid procedure.     

杂交技术治疗B型主动脉夹层的258例预后分析

目的 报道杂交技术治疗B型主动脉夹层(type B aortic dissection, TBAD)的单中心早远期预后。 方法 回顾性分析2006年1月至2018年8月应用杂交技术治疗TBAD的258例患者资料,男性238例(92.2%),平均(52.4±10.3)岁。主要不良事件定义为全因死亡、再次主动脉手术、卒中、脊髓缺血、主动脉破裂、逆撕A型夹层及血管移植物感染;早期结局定义为术后30天或院内事件。通过Kaplan-Meier分析评估远期生存率及桥血管通畅率。结果 手术成功率98.8%(255/258),早期主要不良事件发生率13.6%(35/258),其中全因死亡18例(7.0%)、再手术3例(1.2%)、卒中13例(5.0%)、脊髓缺血5例(1.9%)、主动脉破裂12例(4.7%)、逆撕A型夹层4例(1.6%)。平均随访(46.1±35.8)个月,随访期间新增主要不良事件37例(15.4%),其中全因死亡22例(9.2%)、再手术13例(5.4%)、卒中6例(2.5%)、主动脉破裂9例(3.8%)、逆撕A型夹层2例(0.8%)、血管移植物感染3例(1.3%)。术后1年、5年和10年生存率为(90.1±1.9)%、(83.9±2.6)% 和(77.1±3.8)%,桥血管通畅率为(98.3±0.8)%、(96.2±1.3)%和(87.9±4.5)%。结论 杂交技术是治疗TBAD的有效方法,但早远期并发症发生率较高,需要密切随访。     

“一站式”杂交手术在Stanford A型主动脉夹层患者治疗中的应用价值

目的研究"一站式"杂交手术在Stanford A型主动脉夹层患者治疗中的应用价值。方法选取2015年至2018年期间到北京大学深圳医院就诊的200例Stanford A型主动脉夹层患者进行研究,按数字表法随机分为研究组及常规组,每组100例。结果研究组患者addition EuroSCORE>7%以及Logistics EuroSCORE>6%的比例明显高于常规组,差异有统计学意义(66.0%vs. 36.0%,P<0.001;74.0%vs. 39.0%,P<0.001)。研究组患者比常规组患者具有更高的手术风险,差异有统计学意义(P<0.05)。研究组患者体外循环时间以及主动脉阻断时间比常规组均明显缩短,术后重症监护病房初次停留时间比常规组明显长,差异有统计学意义(P<0.001)。两组患者围术期死亡及术后30 d主要复合不良事件、脑卒中、截瘫、肾功能不全需血液透析辅助治疗的发生率比较,差异均无统计学意义(P>0.05)。结论 "一站式"杂交手术在Stanford A型主动脉夹层患者治疗能够缩减体外循环时间及主动脉阻断时间、降低患者手术创伤、提高手术安全。     

主动脉夹层合并下肢灌注不良临床治疗分析

目的：探讨主动脉夹层合并下肢灌注不良的治疗经验。方法：南京军区南京总医院2010年1月～2015年5月收治伴有下肢灌注不良的主动脉夹层患者13例,回顾分析其治疗方法及近中期随访结果。结果：所有患者均接受手术,7例B型夹层患者行胸主动脉腔内修复术(thoracic endovascular aortic repair,TEVAR),其中4例植入裸支架。6例支架释放后造影见原发破口隔绝,真腔扩张,受累髂动脉显影良好。1例术后右下肢缺血坏死行截肢术,后因多器官功能衰竭死亡。6例A型夹层患者,2例术前评估下肢缺血症状明显,急诊行内膜开窗恢复髂动脉血流,二期行杂交手术。其余4例一期行升主动脉、主动脉弓置换 降主动脉覆膜支架植入术,术后造影见下肢动脉恢复真腔供血。术后患者存活12例,下肢缺血症状明显缓解。所有患者均获随访,患者无胸背部剧痛及下肢缺血表现,髂动脉显影良好。结论：主动脉夹层合并下肢灌注不良应尽早干预,主动脉腔内修复术可消除原发破口,恢复真腔血流,改善大部分患者的缺血症状。     

Prognostic value of left ventricular hypertrophy in postoperative outcomes in type A acute aortic dissection

BackgroundLeft ventricular hypertrophy (LVH) is common in hypertension patients. Hypertension is a recognized risk factor of acute aortic dissection. This study aimed to explore the prognostic value of LVH in predicting postoperative outcomes in acute type A aortic dissection (ATAAD) patients.MethodsThis was a single-central retrospectively designed study. One hundred and ninety-three ATAAD patients who underwent surgical repair at Renmin Hospital of Wuhan University from January 2018 to November 2021 were enrolled. Patients were divided based on their left ventricular mass index (LVMI). We compared their baseline characteristics, perioperative data, and in-hospital outcome. Then nomogram models were developed based on logistic regression to predict the postoperative outcomes.ResultsLVH presented in 28.5% (55 in 193) patients. LVH group had a higher proportion of female patients compared with the non-LVH group (32.7% vs. 17.4%, P=0.03). Decreased left ventricular ejection fraction and cardiac tamponade were more prevalent in patients with LVH. LVH group had a higher risk of postoperative composite major outcomes (CMO) and operative mortality. Based on multivariable logistic regression, LVH/LVMI, Penn classification, hyperlipidemia, emergency surgery and cardiopulmonary bypass duration were applied to develop nomogram models for predicting postoperative CMO. The area under curve was 0.825 (95% CI: 0.749–0.900) for Model LVH and 0.841 (95% CI: 0.776–0.905) for Model LVMI. Nomogram models for predicting postoperative cardiac were developed based on LVH/LVMI and cardiopulmonary bypass duration. The area under curves for the models involving LVH or LVMI were 0.782 (95% CI: 0.640–0.923) and 0.795 (95% CI: 0.643–0.947), respectively.ConclusionsLVH and increased LVMI was associated with increased risk of postoperative CMO and cardiac events in ATAAD patients. The nomogram models based on LVH or LVMI might help predict postoperative CMO. Future research would be necessary to investigate prognostic value of LVH for long-term outcomes in ATAAD patients.     

血浆D-二聚体在急性主动脉夹层诊断中的价值

目的探讨血浆D-二聚体在急性主动脉夹层诊断中的价值。方法回顾分析2005年1月至2011年10月在我院确诊的69例急性主动脉夹层患者（简称主动脉夹层组）、同期70例急性肺栓塞患者（肺栓塞组）和70例因胸痛住院的其他患者（胸痛组）的血浆D-二聚体等临床资料,比较D-二聚体在不同类型患者中的水平差异,分析D-二聚体水平与急性主动脉夹层预后的关系。结果所有急性主动脉夹层患者D-二聚体均超过500μg／L,敏感性100％;死亡患者血浆D-二聚体浓度高于存活患者（P〈0．05）。血浆D-二聚体浓度主动脉夹层组、肺栓塞组和胸痛组分别为（3479．2±2200．0）μg／L、（1560．7±940．0）μg／L和（179．8±167．0）txg／L,三组比较P〈0．01,每两组比较P〈0．05。结论急性主动脉夹层患者血浆D-二聚体明显升高,其平均浓度超过急性肺栓塞患者。D-二聚体阴性有助于排除急性主动脉夹层的诊断;D二聚体升高对判断预后有-定的指导价值。