Epidemiological analysis of 5,595 procedures of endovascular correction of isolated descending thoracic aortic disease over 12 years in the public health system in Brazil

OBJECTIVES: In Brazil, descending thoracic aorta disease, including aneurysms and dissections, is managed preferentially by endovascular treatment, owing to its feasibility and good results. In this study, we analyzed endovascular treatment of isolated descending thoracic aortic disease cases in the Brazilian public health system over a 12-year period. METHODS: Public data from procedures performed from 2008 to 2019 were extracted using web scraping techniques to assess procedure type frequency (elective or urgency), mortality, and governmental costs. RESULTS: A total of 5,595 procedures were analyzed, the vast majority of which were urgent procedures (61.82% vs. 38.18%). In-hospital mortality was lower for elective than for urgent surgeries (4.96 vs.10.32% p=0.008). An average of R$16,845.86 and R$20,012.04 was paid per elective and emergency procedure, respectively, with no statistical difference (p=0.095). CONCLUSION: Elective procedures were associated with lower mortality than urgent procedures. There was no statistically significant difference between elective and urgent procedures regarding costs.

Risk Factors for Acute Renal Failure after Thoracoabdominal Aortic Aneurysm Surgery / 中国医学科学院学报

To investigate the risk factors associated with acute renal failure (ARF) after thoracoabdominal aortic aneurysm (TAAA) surgery. A total of 156 patients underwent TAAA repair between January 2009 and December 2017. Renal failure was defined based on the Kidney Disease Improving Global Outcomes criteria. The patients were divided into ARF group and non-ARF group based on the presence/absence of postoperative ARF. The risk factors of ARF were analyzed by univariate analysis and multivariate logistic analysis. The subjects included 111 males and 45 females aged (40.4±10.9) years (range:19-65 years). The surgical reasons included aortic dissection (=130,83.3%),aneurysm (=22,14.1%),and pseudoaneurysm (=4,2.6%). The degrees of repair included Crawford extent I in 6 patients (3.8%),extent Ⅱ in 128 patients (82.1%),extent Ⅲ in 20 patients (12.8%),and extent Ⅳ in 2 patients(1.3%). There were 3 patients presented with aortic rupture and 6 patients received emergent operations. Nine patients (5.8%) died within 30 days after surgery,and 8 patients (5.1%) suffered from permanent paraplegia. Thirty-six patients (23.1%) had ARF after surgery,and 18 of them needed dialysis. Multivariate logistic analysis showed that smoking ( =2.637,95%=1.113-6.250,=0.028),packed red blood cell usage in operation (≥6 U) ( =5.508,95%=2.144-11.930,=0.000),reoperation for bleeding (=3.529,95%=1.298-9.590,=0.013) were independent risk factors for ARF after TAAA repair. Smoking,packed red blood cell usage in operation (≥6 U),reoperation for bleeding are the independent risk factors of ARF after TAAA surgery.

Predictors of outcomes after correction of acute type a aortic dissection under moderate hypothermic circulatory arrest and antegrade cerebral perfusion

Abstract Introduction: Hypothermic circulatory arrest is widely used for correction of acute type A aortic dissection pathology. We present our experience of 45 consecutive patients operated in our unit with bilateral antegrade cerebral perfusion and moderate hypothermic circulatory arrest. Methods: Between January 2011 and April 2015, 45 consecutive patients were admitted for acute type A aortic dissection and operated emergently under moderate hypothermic circulatory arrest and bilateral antegrade cerebral perfusion. Results: Mean age was 58±11.4 years old. Median circulatory arrest time was 41.5 (30-54) minutes while the 30-day mortality and postoperative permanent neurological deficits rates were 6.7% and 13.3%, respectively. Unadjusted analysis revealed that the factors associated with 30-day mortality were: preoperative hemodynamic instability (OR: 14.8, 95% CI: 2.41, 90.6, P=0.004); and postoperative requirement for open sternum management (OR: 5.0, 95% CI: 1.041, 24.02, P=0.044) while preoperative hemodynamic instability (OR: 8.8, 95% CI: 1.41, 54.9, P=0.02) and postoperative sepsis or multiple organ dysfunction (OR: 13.6, 95% CI: 2.1, 89.9, P=0.007) were correlated with neurological dysfunction. By multivariable logistic regression analysis, postoperative sepsis and multiple organ dysfunction independently predicted (OR: 15.9, 95% CI: 1.05, 96.4, P=0.045) the incidence of severe postoperative neurological complication. During median follow-up of 6 (2-12) months, the survival rate was 86.7%. Conclusion: Bilateral antegrade cerebral perfusion and direct carotid perfusion for cardiopulmonary bypass, in the surgical treatment for correction of acute aortic dissection type A, is a valuable technique with low 30-day mortality rate. However, postoperative severe neurological dysfunctions remain an issue that warrants further research.

Correção cirúrgica de aneurisma dissecante crônico da aorta ascendente: relato de caso / Surgical correction of dissecting aneurysm chronic ascending aorta: case report

As doenças da aorta apresentam elevada morbimortalidade. Um aneurisma é uma dilatação irreversível e ocorre quando o diâmetro da artéria aorta superar a 50% do previsto no segmento analisado. Observa-se o aumento da incidência de aneurismas dissecantes da aorta; provavelmente devido à maior sobrevida da população, à melhoria dos meios diagnósticos, ao maior número de pessoas atendidas pelos serviços de saúde e pelo aumento dos fatores causadores de dissecção. Pacientes com quadro de aneurisma de aorta apresentam prognóstico sombrio, podendo permanecer assintomáticos por anos. Na aorta ascendente, a dilatação progressiva de uma dissecção crônica pode levar à insuficiência valvar aórtica, ou à ruptura espontânea. O tratamento operatório da dissecção aórtica é um desafio para o cirurgião cardiovascular. Relatamos um caso abordando a correção cirúrgica de aneurisma dissecante crônico da aorta ascendente.

The diseases of the aorta with high morbidity and mortality. An aneurysm is a dilatation irreversible and occurs when the diameter of the aorta artery to overcome the 50% of predicted in segment analyzed. There is an increase in the incidence of aneurysm dissecting the aorta; probably due to the greater survival of the population, the improvement of diagnostic means, the greatest number of people served by health services and by the increase of the factors that cause of dissection. Patients with aortic aneurysms have poor prognosis, and may remain asymptomatic for years. In the ascending aorta, the progressive dilatation of a chronic dissection can lead to aortic valve insufficiency, or the spontaneous rupture. The surgical treatment of aortic dissection is a challenge for the cardiovascular surgeon. We report a case dealing with the surgical correction of dissecting aneurysm chronic ascending aorta.

Thoracoabdominal aortic aneurysm in a hiv-positive patient

Abstract Advent of antiretroviral therapy has increased survival of patients with human immunodeficiency virus (HIV) infections, with the result that some of these patients now develop degenerative diseases, such as atherosclerotic aneurysms. Degenerative thoracoabdominal aortic aneurysm is rare in HIV patients. In this report, a 63-year-old male patient with HIV submitted to open repair of thoracoabdominal aortic aneurysm. The patient did not suffer any type of complication in the perioperative period and remained well in a 28-month follow-up period. In summary, open repair still remains a good alternative for aortic complex aneurysms even in HIV patients.

Clinical study of continuous external drainage combined with intrathecal infusion of urokinase in prevention and treatment of cerebral vasospasm after aneurysm / 中国生化药物杂志

Objective To explore the persistent cerebrospinal fluid drainage and intrathecal injection of urokinase in prevention and treatment of cerebral vasospasm after aneurysm surgery.Methods The effect of prevention and treatment of cerebral vasospasm after aneurysm surgery in 40 patients, using the method combined with intrathecal injection of urine kinase for persistent cerebrospinal fluid drainage, and classified as the observation group;the other 40 cases patients with persistent cerebrospinal fluid drainage intervention, and classified as the control group, two groups of patients were in Shandong Provincial Hospital from January 2016 to January 2017.Results The incidence of rebleeding in two groups had no significant difference in observation of cerebral vasospasm in patients with the incidence was significantly lower than the control group, the observation The incidence of cerebral vasospasm group was 15.0%, 37.5% in the control group, compared two groups of patients with the prognosis, the obvious observation group of patients with good prognosis, comparison between groups showed significantly(P<0.05).Conclusion Persistent cerebrospinal fluid drainage and intrathecal injection of urokinase on the clinical study of postoperative cerebral vasospasm aneurysm found the simple, compared with continuous drainage of cerebrospinal fluid, can improve the clinical condition of patients, and promote the recovery of patients, reduce cerebral vascular spasm, so it is worthy of reference.

Endoscopic Fluorescence Angiography with Indocyanine Green : A Preclinical Study in the Swine

OBJECTIVE: Microscopic indocyanine green (ICG) angiography is useful for identifying the completeness of aneurysm clipping and the preservation of parent arteries and small perforators. Neuroendoscopy is helpful for visualizing structures beyond the straight line of the microscopic view. We evaluated our prototype of endoscopic ICG fluorescence angiography in swine, which we developed in order to combine the merits of microscopic ICG angiography and endoscopy. METHODS: Our endoscopic ICG system consists of a camera, a light source, a display and software. This system can simultaneously display real-time visible and near infrared fluorescence imaging on the same monitor. A commercially available endoscope was used, which was 4 mm in diameter and had an angle of 30degrees. A male crossbred swine was used. RESULTS: Under general anesthesia, a small craniotomy was performed and the brain surface of the swine was exposed. ICG was injected via the ear vein with a bolus dose of 0.3 mg/kg. Visible and ICG fluorescence images of cortical vessels were simultaneously observed on the display monitor at high resolution. The real-time merging of the visible and fluorescent images corresponded well. CONCLUSION: Simultaneous visible color and ICG fluorescent imaging of the cortical vessels in the swine brain was satisfactory. Technical improvement and clinical implication are expected.

Impact of cerebral hemodynamics and oxygen metabolism of dexmedetomidine on patients with intracranial aneurysm surgery / 中国综合临床

Objective To investigate the effects of cerebral hemodynamics and oxygen metabolism of dexmedetomidine on patients with intracranial aneurysm surgery.Methods Sixty-four patients with intracranial aneurysm surgery were collected and randomly divided into study group and control group (32 cases for each group).Patients in the study group before induction of anesthesia were given dexmedetomidine and patients in the control group were given saline but anesthesia.Mean arterial pressure (MAP),heart rate (HR),cerebral metabolic rate of oxygen(CMRO2) in different time points were observed and time in intubation and intracranial aneurysm clamp before anesthesia were rescored.Cerebral blood flow (CBF),intracranial pressure (ICP) were observed and the recovery situation.Results At the intubation,MAP and HR in the study group after 15 min of intubation,time in intracranial aneurysm clamp and extubation were significantly lower than those of the control group(P ＜ 0.05).CMRO2 in study group at the intubation and intracranial aneurysm clamp were (34.2 ± 5.0) ％ and (27.1 ± 4.2),significantly higher than that of the control group ((33.9 ± 4.3) ％,(26.5 ±3.6) ％; P ＜ 0.05).CBF in study group at the intubation and intracranial aneurysm clamp were (53.5 ±8.8) ml/(100 g · min) and (56.8 ±9.2) ml/(100 g · min),significantly lower than that of control group ((67.3±11.2) ml/(100 g· min),(67.3 ±11.2) ml) (100 g· min); P＜0.05) ; The same trend was seen in terms of ICP.Spontaneous breathing recovery time and extubation time in study group were (7.35 ± 1.12) h and(12.98 ± 3.76),significantly earlier than those of the control group((9.27 ± 1.45) h and (14.89 ±4.88) h; t =10.92,9.23,P ＜0.01).Steward scores in study group was (5.12 ±0.33),significantly higher than control group ((3.98 ± 0.28) ; t =5.55,P ＜ 0.05).Conclusion Dexmedetomidine can certainly keep hemodynamic stability in patients with intracranial aneurysm surgery,improve rate of cerebral oxygen uptake and recovery performance,which is worthy of clinical application and promotion.

Risk factors and treatments for neurological complications after deep hypothermic ciculatory arrest operation / 中国医师杂志

Objective To investigate the risk factors for neurological complications after deep hypothermic ciculatory arrest (DHCA) operation.Methods From January 2009 to October 2013, 70 patients who were diagnosed as aortic dissection or aortic an-eurysm underwent aortic operations under DHCA .According to the occurrence of neurological complications after surgery , patients were divided into neurological complication group (26 patients) and normal group (44 patients).Risk factors of neurological complications after surgery were evaluated by univariate analysis and multivariate logistic regression analysis .Results Central neurological compli-cations occurred in 26 patients (37.14%) , including 18 patients with temporary neurological dysfunction and 7 patients with perma-nent neurological dysfunction , 1 patient with paraplegia , 1 patient died of cerebral infarction .Univariate analysis showed that hyperten-sion disease( P =0.001), emergency surgery within 72 hours( P =0.009),cardiopulmonary bypass time ( P =0.015),antegrade se-lective cerebral perfusion ( ASCP) ( P =0.005 ) , hemodilution degree ( P =0.001 ) , erythrocyte ( P =0.033 ) and plasma ( P =0.034 ) transfusion volume in the perioperative period , oxygen index <200 mmHg in 4 hours postoperatively ( P =0.043 ) , arterial blood pressure instability ( P =0.037 ) and hypernatremia in 24 hours postoperatively ( P =0.001 ) , and the Acute Physiology And Chronic Health Evaluation II (APACHE II) score are the risk factors for central neurological complication .Hypertension disease( P =0.017 ) , emergency surgery within 72 hours ( P =0.048 ) , ASCP ( P =0.015 ) , hypernatremia in 24 hours postoperatively ( P =0.008 ) were independent determinats for central neurological complication .Conclusions A series of procedure including evaluating patients condition correctly before operation , controlling hypertension effectively in the perioperative period , applying the ASCP and the suitable hemodilution degree in operation , maintaining electrolyte balance , and correcting hypernatremia timely in the postoperative pe-riod maybe reduce the incidence of neurological complications after DHCA operation .

Fatores de risco pré, intra e pós-operatórios para mortalidade hospitalar em pacientes submetidos à cirurgia de aorta / Risk factors for pre, intra, and postoperative hospital mortality in patients undergoing aortic surgery

OBJETIVOS: O objetivo primário deste estudo é identificar preditores de óbito hospitalar em pacientes submetidos à cirurgia de aorta. O objetivo secundário é identificar fatores associados ao desfecho clínico composto hospitalar (óbito, sangramento, disfunção ventricular ou complicações neurológicas). MÉTODOS: Delineamento transversal com componente longitudinal; por meio de revisão de prontuários, foram incluídos 257 pacientes. Os critérios de inclusão foram: dissecção crônica de aorta tipo A de Stanford e aneurisma de aorta ascendente. Foram excluídos casos de dissecção aguda de aorta, qualquer tipo, e aneurisma de aorta não envolvendo segmento ascendente. As variáveis avaliadas foram demografia, fatores pré, intra e pós-operatórios. RESULTADOS: Variáveis com risco aumentado de óbito hospitalar (RC; IC95%; P valor): etnia negra (6,8; 1,54 30,2; 0,04), doença cerebrovascular (10,5; 1,12-98,7; 0,04), hemopericárdio (35,1; 3,73-330,2; 0,002), operação de Cabrol (9,9; 1,47-66,36; 0,019), cirurgia de revascularização miocárdica simultânea (4,4; 1,31-15,06; 0,017), revisão de hemostasia (5,72; 1,29-25,29; 0,021) e circulação extracorpórea (CEC) [min] (1,016; 1,007-1,026; 0,001). Dor torácica associou-se com risco reduzido de óbito hospitalar (0,27; 0,08-0,94; 0,04). Variáveis com risco aumentado do desfecho clínico composto hospitalar foram: uso de antifibrinolítico (3,2; 1,65-6,27; 0,0006), complicação renal (7,4; 1,52-36,0; 0,013), complicação pulmonar (3,7; 1,5-8,8; 0,004), EuroScore (1,23; 1,08-1,41; 0,003) e tempo de CEC [min] (1,01; 1,00-1,02; 0,027). CONCLUSÃO: Etnia negra, doença cerebrovascular, hemopericárcio, operação de Cabrol, revascularização miocárdica simultânea, revisão de hemostasia e tempo de CEC associaram-se com risco aumentado de óbito hospitalar. Dor torácica associou-se com risco reduzido de óbito hospitalar. Uso de antifibrinolítico, complicação renal, complicação pulmonar, EuroScore e tempo de CEC associaram-se ao desfecho clínico composto hospitalar.

OBJECTIVES: The primary objective was to identify predictors of hospital mortality in patients undergoing aortic surgery. The secondary objective was to identify factors associated with clinical outcome composed hospital (death, bleeding, neurologic complications or ventricular dysfunction). METHODS: A cross-sectional design with longitudinal component. Through chart review, 257 patients were included. Inclusion criteria were: aortic dissection Stanford type A and ascending aortic aneurysm. Exclusion criteria were acute aortic dissection, of any kind, and no aortic aneurysm involving the ascending segment. Variables assessed: demographics, preoperative factors, intraoperative and postoperative. RESULTS: Variables with increased risk of hospital mortality (OR, 95% CI, P value): black ethnicity (6.8, 1.54-30.2; 0.04), cerebrovascular disease (10.5, 1.12-98.7; 0.04), hemopericardium (35.1, 3.73-330.2; 0.002), Cabrol operation (9.9, 1.47-66.36; 0.019), CABG simultaneous (4.4; 1.31 to 15.06; 0.017), bleeding (5.72, 1.29-25.29; 0.021) and cardiopulmonary bypass (CPB) time [min] (1.016; 1.0071.026; 0.001). Thoracic pain was associated with reduced risk of hospital death (0.27, 0.08-0.94, 0.04). Variables with increased risk of hospital clinical outcome compound were: use of antifibrinolytic (3.2, 1.65-6.27; 0.0006), renal complications (7.4, 1.52-36.0; 0.013), pulmonary complications (3.7, 1.58.8, 0.004), EuroScore (1.23; 1.08-1.41; 0.003) and CPB time [min] (1.01; 1.00 to 1.02; 0.027). CONCLUSION: Ethnicity black, cerebrovascular disease, hemopericardium, Cabrol operation, CABG simultaneous, hemostasis review and CPB time was associated with increased risk of hospital death. Chest pain was associated with reduced risk of hospital death. Use of antifibrinolytic, renal complications, pulmonary complications, EuroScore and CPB time were associated with clinical outcome hospital compound.

The Clinical Presentation and Treatment of Distal Posterior Inferior Cerebellar artery Aneurysms: Report on 2 cases / 대한뇌혈관외과학회지

Aneurysms arising from the posterior inferior cerebellar artery (PICA) are uncommon, with a reported incidence ranging between 0.5 and 2% of all the aneurysms in the brain. Most of them arise at the PICA origin from the vertebral artery, whereas distal PICA aneurysms are exceptional. We have experienced two consecutive cases of distal PICA aneurysms. Both patients were female and the first patient was 48 years old and the second patient was 60 years old. Cerebral angiography was performed immediately after admission and it showed an aneurysm located on the distal PICA. One patient was treated by a combined endovascular and surgical approach, and the other patient was treated by a surgical approach only. The former patient expired 8 days from the ictus. The latter patient had a good outcome during admission. Distal PICA aneurysms are exceptionally rare and they may be successfully treated with surgical or endovascular techniques. The therapeutic strategy, either surgical or endovascular, should be selected according to the condition of the patient and the arterial and aneurysmal morphology.

Remote Cerebellar Hemorrhage After Surgery for an Unruptured Aneurysm / 대한뇌혈관외과학회지

We report here on 2 cases of remote cerebellar hemorrhage (RCH) that developed after surgery for supratentorial unruptured aneurysm. In both cases, cerebral angiography was performed to diagnose the aneurysms and then screening was conducted for determining if there were any previous bleeding tendencies and comorbidities. After surgery, computed tomography (CT) was immediately performed to check for postoperative hemorrhage or infarction, and the images showed cerebellar hemorrhage that was relatively far away from the surgical site. We present the similarities of the 2 patients' preoperative angiography and CT and their perioperative blood pressure, and we discuss these findings to illuminate the pathophysiology of RCH.

Clinical Analysis of Distal Posterior Inferior Cerebellar Artery Aneurysm / 대한뇌혈관외과학회지

OBJECTIVE: This study was designed to determine the clinical characteristics of patients with aneurysms that are located at the distal posterior inferior cerebellar artery (dPICA). PATIENTS & METHODS: From September 1976 to June 2007, 54 consecutive patients with PICA aneurysms were treated at our institute. Among them, 19 patients had PICA aneurysms distal to the junction of the vertebral artery-PICA. We retrospectively reviewed the database and imaging studies as sources of information for analysis. RESULTS: Five patients were male and 14 patients were female. The mean age was 44.6 years old (range: 23-70). Sixteen patients had ruptured lesions: 1 patient was Hunt and Hess Grade I, 4 were Grade II, 5 were Grade III, 4 were Grade IV and 2 were Grade V. Intraventricular hemorrhage or intracerebral hemorrhage was identified in 5 patients on the initial computed tomography (CT). Three patients had unruptured lesions. The locations of aneurysm were the lateral medullary segment in 10 patients, the tonsillomedullary segment in 1 patient, the telovelotonsillar segment in 5 patients and the cortical segment in 3 patients. Most aneurysms (17) were the saccular shape. Seventeen aneurysms were small and 2 were large or giant. The mean diameter of aneurysm was 6.5 mm (range: 2.0-28.0) and the mean diameter of the ruptured aneurysm was 4.8 mm (range: 2.0-12.0). Two patients had mirror aneurysms. Post-hemorrhagic hydrocephalus was identified in 10 patients on the initial CT and shunt surgery was performed on 3 patients. The obliteration methods of the aneurysms were microsurgery in 15 patients (midline suboccipital approach: 9, lateral suboccipital approach: 6) and endovascular surgery in 4 patients (therapeutic distal PICA occlusion: 3, intra-aneurysmal coiling: 1). Early surgery was performed on 2 patients, intermediate surgery (days between rupture: 4-10) was performed on 4 patients and delayed surgery was performed on 10 patients. The mean post-treatment follow up period was 49.5 months (range: 7-156). The clinical outcome was assessed using the modified Glasgow Outcome Scale. All the patients showed favorable outcomes. Five patients suffered from treatmentrelated complications (a CSF collection requiring wound revision for dura repair: 2, shunt surgery: 1 and transient hemiparesis due to impairment of the blood flow distal to the aneurysm: 2). CONCLUSIONS: In our series, distal PICA aneurysms had the characteristics of a female predominance, they more often presented with intraventricular hemorrhage and the rupture was of a relatively small size. Both microsurgery and endovascular surgery can be troublesome due to the small size, wide neck and tortuosity of the proximal parent artery and the location of aneurysms at a branching site. The surgeons should be careful for preserving vessel patency and insuring watertight dura repair.

Surveillance in the Cerebral Aneurysm Surgery / 대한뇌혈관외과학회지

Intraoperative monitoring has been a valuable part in the cerebral aneurysm surgery. Insight into the nervous system and the relationship of the aneurysm to the adjacent structure during the surgery provide critical information to the surgeon allowing reversal or avoidance of neural insults and the complete clipping of the aneurysm. The goal of cerebral aneurysm surgery is to eliminate the risk of hemorrhage but not disrupt the surrounding vascular and neural structures. Several techniques including microvascular doppler ultrasonography, monitoring cerebral blood flow, evoked potentials, intraoperative angiography, endoscope assisted aneurysm surgery and neuronavigator system are used for the surveillance in the aneurysm surgery. The abnormal findings in these procedures can change surgical management during the surgery such as removal or readjustment of temporary or permanent clips and a decrease in brain retraction or manipulation. The additional feedback provided by intraoperative monitoring promises to improve the safety and efficacy of aneurysm surgery.

Remote Cerebellar Hemorrhage after Supratentorial Aneurysmal Surgery: Report of Six Cases

The case of postoperative hemorrhage occurring apart from the operative site as a complication of intracranial surgery is a rare malady, especially when it involves the cerebellum after supratentorial aneurysm surgery. In a review of the literature, the possible etiologies for cerebellar hemorrhage are: coagulopathy, intraoperative urokinase irrigation, excessive head rotation on positioning, brain shift due to excessive cerebrospinal fluid(CSF) and epidural hemovac drainage. We experienced six cases of cerebellar hemorrhage after supratentorial aneurysm surgery, and all of the patients were improved by instituting conservative medical treatment. The possible mechanism for the remote cerebellar hemorrhages seen in our series is probably a multifactorial effect, such as excessive epidural hemovac and CSF drainage, and jugular venous compression due to the operative position. The purpose of this report is to alert neurosurgeons to the existence of this syndrome and to suggest several ways of minimizing the possibility of their patients developing remote cerebellar hemorrhage.

Estudo experimental da transmissão da pulsatilidade da endoprótese à parede do aneurisma da aorta após correção endoluminal / Pulsatility transmission from endograft to aortic aneurysm wall after endovascular repair: an experimental study

Objetivo: Medir a pulsatilidade da parede do aneurisma de aorta humano antes e depois de sua correção endoluminal. Método: Cinco aneurismas foram submetidos à perfusão pulsátil antes e depois do implante de uma endoprótese. Resultado: o nível da coluna de água oscilou durante a pulsação com variações de 17, 16, 13, 7 e 25 cm antes da colocação da endoprótese. Depois da prótese, a oscilação diminuiu em todos os casos para 13, 12, 9, 3,5 e 23 cm, respectivamente. Conclusão: A pulsação da endoprótese é transmitida à parede do aneurisma.

Objective: To measure the pulsatility of human aortic aneurysms before and after exclusion with endograft. Method: Five aneurysms were submitted to pulsatile perfusion before and after implantation of a bifurcated endograft. Result: The level of the water column oscillated during pulsation, in each case, with an amplitude of 17, 16, 13, 7 and 25 cm before the endograft insertion. After that, the amplitudes dropped to, respectively 13, 12, 9, 3.5 and 23 cm.Conclusion: Pulsation of an endograft is transmitted to the aneurysm wall even in the absence of endoleak.

A Comparative Surgical Outcome Study between Below and Above 60 Year-old Patients in Intracranial Aneurysms

OBJECTIVE: The author divide the patients of cerebral aneurysm into two groups, those under and over sixty years of age, and analyze retrospectively how the ages of patients influence the outcome after the operation. METHODS: Among the patients who underwent surgical treatments for aneurysmal rupture at Dankook University Hospital between June, 1994 and June, 1999, the author took 151 cases in which postoperative follow up was possible over 6 months. After dividing them into the young and old aged groups, the author analyzed, clinical characteristics, postoperative results, complications, and the overall prognosis using Glasgow outcome scale of each group. RESULTS: Comparatively young age group to old age group ratio was 84:67, and the old aged group showed higher occurrence in women. Age distribution ranged from 19 to 78 years of age. According to Hunt-Hess grade measured at the time of admission, there was higher proportion of grade II and III in both groups, and according to Fisher grade based on brain CT scan, there was a higher proportion of grade III in both groups. In the young aged group, aneurysm was found in middle cerebral artery(MCA), anterior cerebral artery(ACA) and posterior cerebral artery(PCA) in the order of frequency. In the old aged group, aneurysm of PCA was most common followed by that of ACA and MCA. There was no higher prevalence of post-operative complications among old aged patients except for the occurrence of hydrocephalus. The outcome of patients assessed 6 months after the operation showed that the prognosis depended more on the Hunt - Hess grade and Fisher grade at the time of admission rather than the difference in age. CONCLUSION: Except for the occurrence of hydrocephalus in the old aged group, age did not seem to in-fluence the occurrence of post-operative complications after surgical treatment of aneurysm. Such findings warrant on aggressive surgical treatment for brain aneurysm in older patients.

46 cases of off-pump CABG and plication of left ventricular aneurysm / 中华胸心血管外科杂志

Objective To review the experience of OPCAB and plication of left ventricular aneurysm. Methods Without cardiopulmonary bypass, heparin was given at 1.0～1.5 mg/kg.The 2-0 Surgipro 843 sutures were placed across the base of aneurysm using a strip of teflon felt on either side. The suture line was oriented to reconstruct a relatively normal left ventricular contour. Concurrent CABG was performed. Results 46 cases were reviewed. Left internal mammary artery (LIMA) grafts to the LAD were performed in 39 cases, off-pump with cardiopulmonary bypass in 3, IABP were used in 2. One patient died of left ventricular dysfunction. The other patients had no new myocardial infarctions and were discharged 10 to 14 postoperative days. Conclusion OPCAB and plication of left ventricular aneurysm could obviously decrease the risk of cardiac rupture and avoid the complications of cardiopulmonary bypass.

Revascularization in the Management of Complex Cerebral Aneurysm / 대한뇌혈관외과학회지

The objective of aneurysm surgery is to exclude the aneurysm from the circulation while preserving blood flow distal to the lesion. In certain situations, the aneurysm neck cannot be clipped safely or the parent vessel reconstructed, primarily in large or giant size with incorporation of parent vessels or perforating arteries, calcification at the aneurysm base, and fusiform or dissecting aneurysms. In such cases, occlusion of the parent vessel is a treatment of option. In many patients, however, sacrifice of the parent artery has an associated risk of ischemic stroke. Therefore, sacrifice of the parent vessel can be supplimented with distal revascularization to provide the necessary distal blood flow while allowing the aneurysm to be trapped. The indications, options, and surgical approaches are described with review of literatures. Finally the authors' experiences of revascularization in 7 patients with unclippable aneurysms are reported.