Left atrial appendage occluder detachment treated with transthoracic ultrasound combined with digital subtraction angiography guided catcher:A case report

BACKGROUND There are very few cases of cardiac occluder detachment,and it is rare to completely remove the occluder using interventional methods without undergoing thoracotomy surgery after detachment.This case innovatively used ultrasound guidance combined with digital subtraction angiography(DSA)to completely remove the occluder,accumulating some experience.CASE SUMMARY The patient underwent left atrial appendage occlusion surgery in our hospital due to atrial fibrillation.After the surgery,the occluder fell off and became free in the left ventricle,which is very dangerous.We innovatively used ultrasound guidance,combined with DSA,and interventional surgery to successfully capture the free occluder using a catcher,completely remove it,and then re implant a new left atrial appendage occluder.After the surgery,the patient recovered very well.CONCLUSION The size selection of the occluder is slightly conservative,and the shape of the left atrial appendage opening is irregular.

Enhancing transjugular intrahepatic portosystemic shunt procedure efficiency with digital subtraction angiography image overlay technology in esophagogastric variceal bleeding

BACKGROUND Transjugular intrahepatic portosystemic shunt(TIPS)is a pivotal intervention for managing esophagogastric variceal bleeding in patients with chronic hepatic schistosomiasis.AIM To evaluate the efficacy of digital subtraction angiography image overlay tech-nology(DIT)in guiding the TIPS procedure.METHODS We conducted a retrospective analysis of patients who underwent TIPS at our hospital,comparing outcomes between an ultrasound-guided group and a DIT-guided group.Our analysis focused on the duration of the portosystemic shunt puncture,the number of punctures needed,the total surgical time,and various clinical indicators related to the surgery.RESULTS The study included 52 patients with esophagogastric varices due to chronic hepatic schistosomiasis.Results demonstrated that the DIT-guided group expe-rienced significantly shorter puncture times(P<0.001)and surgical durations(P=0.022)compared to the ultrasound-guided group.Additionally,postoperative assessments showed significant reductions in aspartate aminotransferase,B-type natriuretic peptide,and portal vein pressure in both groups.Notably,the DIT-guided group also showed significant reductions in total bilirubin(P=0.001)and alanine aminotransferase(P=0.023).CONCLUSION The use of DIT for guiding TIPS procedures highlights its potential to enhance procedural efficiency and reduce surgical times in the treatment of esophagogastric variceal bleeding in patients with chronic hepatic schistoso-miasis.

Detection of hypervascular hepatocellular carcinoma: Comparison of multi-detector CT with digital subtraction angiography and Lipiodol CT

AIM: The purpose of this study was to compare the diagnostic accuracy of biphasic multi-detector row helical computed tomography (MDCT), digital subtraction angiography (DSA)and Lipiodol computed tomography (CT) in detection of hypervascular hepatocellular carcinoma (HCC).METHODS: Twenty-eight patients with nodular HCC underwent biphasic MDCT examination: hepatic arterial phase (HAP) 25 s and portal venous phase (PVP) 70 s after injection of the contrast medium (1.5 mL/kg). They also underwent hepatic angiography and intra-arterial infusion of iodized oil. Lipiodol CT was performed 3-4 wk after infusion. MDCT images were compared with DSA and Lipiodol CT images for detection of hepatic nodules.RESULTS: The three imaging techniques had the same sensitivity in detecting nodules ＞20 mm in diameter. There was no significant difference in the sensitivity among HAP-MDCT, Lipiodol CT and DSA for nodules of 10-20 mm in diameter. For the nodules ＜10 mm in diameter, HAP-MDCT identified 47, Lipiodol CT detected 27 (X2= 11.3, P= 0.005＜0.01, HAP-MDCT vs Lipiodol CT) and DSA detected 16(X2= 9.09, P= 0.005＜0.01 vs Lipiodol CT and X2= 29.03,P = 0.005＜0.01 vs HAP-MDCT). However, six nodules ＜10 mm in diameter were detected only by Lipiodol CT.CONCLUSION: MDCT and Lipiodol CT are two complementary modalities. At present, MDCT does not obviate the need for DSA and subsequent Lipiodol CT as a preoperative examination for HCC.

Digital subtraction angiography for the analysis of supraaortic vessels: What is its role nowadays?

For about 50 years, angiography represented the only imaging method for studying carotid arteries in order to detect the presence of pathological stenosis due to atherosclerotic plaque. Recently, thanks to the use of non-invasive methods, physicians are able to study and quantify the presence of carotid atherosclerosis in vivo These procedures have enabled the introduction of new concepts: (1) the degree of carotid stenosis is approxi- mate to the volume and extension of carotid plaque; and (2) a set of parameters, easily identifiable by com- puted tomography angiography, magnetic resonance angiogram and ultra-sound echo-color Doppler, are closely linked to the development of ischemic symptoms and can significantly increase the risk of stroke regard- less of the degree of stenosis. In light of these findings vulnerable plaques should be identified early, and the role of Digital Subtraction Angiography which is a purely technical luminal technique should be determined.

Interventional digital subtraction angiography for small bowel gastrointestinal stromal tumors with bleeding

AIM: To retrospectively evaluate the diagnostic efficacy of interventional digital subtraction angiography (DSA) for bleeding small bowel gastrointestinal stromal tumors (GISTs).

Modified magnetic resonance angiography of the liver using sensitivity encoding in comparison with digital subtraction angiography and CT arterial portography

BACKGROUND: Over 355 patients have received ortho- topic liver transplantation ( OLT) at this hospital since 1993. Preoperative imaging studies of both hepatic vessels and parenchyma in these recipients bettered surgical plan- ning or even precluded the necessity of surgery. Here we report our preliminary results of modified magnetic reso- nance angiography ( MRA ) using sensitivity encoding ( SENSE) through comparative study with conventional digital subtraction angiography (DSA) and CT arterial por- tography (CTAP). METHODS: Sixteen patients with suspected liver diseases were included in the study. All of them received both dy- namic MRI of the liver using SENSE and digital DSA with CTAP within a two-week interval. The four-phase MRA was reconstructed from source images of the coronal dy- namic study. The arterial phase of the modified MRA was compared with DSA in the evaluation of hepatic arteries and the portal phase compared with CT portography recon- structed from source images of CTAP. In dynamic study of the liver, a fixed dose (20 ml) of contrast medium and scan timing were used. RESULTS: The main branches and variations of the hepatic arterial system were well shown on the modified MRA, al- though the marginal branches of hepatic arteries were of poor quality. The figures of portal veins on MRA were as clear as or superior to those of CTAP. In addition, the su- prarenal inferior vena cava (IVC) was well demonstrated on MRA and/or non contrast-enhanced coronal balanced fast-field echo (b-FFE) scan sequence in most cases. MRI detected most parenchymal lesions of the liver and hemo- dynamics of these lesions could be evaluated on source ima- ges of the modified MRA. MRI/MRA also serendipitously revealed several extrahepatic disease entities or variations that were not found on DSA/CTAP. CONCLUSIONS: The modified MRA using SENSE is a cost-effective modality of examination for the demonstra- tion of the whole hepatic vascular system. Combined with MRI, it has the potential as a one-stop imaging modality in the preoperative evaluation in fields such as OLT.

Carbon dioxide digital subtraction angiography manifestations of hepa-tocellular carcinoma

Objective: To investigate the imaging features and clinical significance of carbon dioxide digital subtraction angiography (CO2-DSA) in the diagnosis and treatment of hepatocellular carcinoma (HCC). Methods: Both CO2-DSA and conventional DSA were performed in all 47 patients with HCC, and the angio-graphic manifestations of CO2-DSA were compared with those of conventional DSA in the same patients. Results: Peripheral arterial and capillary imaging by CO2-DSA was inferior to that by conventional DSA, although blood pools were well visualized with CO2. Improved visualization of arterioportal shunting (APS) was obtained with CO2-DSA compared with that by conventional angiography. APS was observed in 33 cases by CO2-DSA and in 12 cases by conventional angiography (P<0. 001). Retrograde visualization of the portal vein (PV) trunk and its large branches was demonstrated in 16 cases by CO2-DSA and in 1 case by conventional DSA (P<0. 001). The manifestation of lipiodol retention in the tumors was consistent with CO2-DSA images after TAE in 38 cases, and with those of conventional DSA in 23 cases (P<0. 01). Conclusion: CO2-DSA was superior to conventional DSA in the detection of APS and retrograde visualization of PV system, and the former can provide usefulness information for the treatment planning (chemoembolization) and patient prognosis. Demonstration of APS by CO2-DSA may suggest the presence of intrahepatic metastases.

Head dual energy-computed tomography angiography versus neuro-digital subtraction angiography

Dual-energy X-ray absorptiometry provides two modes of head computed tomography （CT） angiography scanning： neuro-digital subtraction angiography and dual-energy CT angiography （DE-CTA）. Previous studies have compared image quality, radiation exposure, and bone removal between neuro-digital subtraction angiography and DE-CTA. However, the number of cases was relatively small. The present study examined 300 suspected cases of cerebrovascular disease and observed the methods and duration of post-processing, examination time, and data volume. Results demonstrated similar image quality between the two methods, but lower radiation doses and shorter examination time in DE-CTA. DE-CTA allowed for faster and more stable scanning performance and post-processing methods, facilitating accurate and direct diagnosis of cerebrovascular disease.

Value of digital subtraction angiography in endovascular graft exclusion for abdominal aortic aneurysms

Objective: To evaluate the value of digital subtraction angiography (DSA) in management of endovascular graft exclusion (EVGE) for abdominal aortic aneurysms. Methods: Monitored by DSA and fluoroscopy, stent-graft complex were introduced into the aneurysm sac via femoral arteries and were deployed at the proximal and distal necks to exclude the sac from circulation. Results: The success rate of deployment was 94. 74% (36/38). Endoleaks occurred in 4 cases. One converted to open surgery because of sac rupture 4 days after deployment. Thrombosis and stenosis occurred in 2 cases. Three patients died shortly after the operation (< 3 months). Conclusion: DSA can monitor EVCE on real-time throughout the whole procedure. It can meet the needs of measurement, location, evaluating, detecting, and also can be much helpful in correcting complications. Moreover, it provides large visual field and operating space, and is a very important monitoring method for EVGE.

Duodenal ulcer caused by coil wiggle after digital subtraction angiography-guided embolization: A case report

BACKGROUND Acute gastrointestinal bleeding(GIB)is a life-threatening medical emergency with high morbidity and mortality.Transcatheter embolization with endovascular coils under digital subtraction angiography guidance is a common and effective method for the treatment of GIB with high technical success rates.Duodenal ulcers caused by coils wiggled from the branch of the gastroduodenal artery,which is a rare complication,have not previously been reported in a patient with right intrathoracic stomach.CASE SUMMARY A 62-year-old man had undergone thoracoscopy-assisted radical resection of esophageal cancer and gastroesophageal anastomosis 3 years ago,resulting in right intrathoracic stomach.He was admitted to the hospital 15 mo ago for dizziness and suffered acute GIB during his stay.Interventional surgery was urgently performed to embolize the branch of the gastroduodenal artery with endovascular coils.After 15 mo,the patient was re-admitted with a chief complaint of melena for 2 d,esophagogastroduodenoscopy and abdominal computed tomography revealed that some endovascular coils had migrated into the duodenal bulb,leading to a deep ulcer.Bleeding was controlled after conservative treatment.Seven months later,duodenal balloon dilatation was performed to relieve the stenosis after the removal of a few coils,and the patient was safely discharged with only one coil retained in the duodenum due to difficulties in complete removal and risk of bleeding.Mild melena recurred once during the long-term follow-up.CONCLUSION Although rare,coil wiggle after interventional therapy requires careful attention,effective precautionary measures,and more secure alternative treatment methods.

Observation on 108 Normal Ophthalmic Arteries in 80 Patients by Digital Subtraction Angiography

By digital subtraction angiography(DSA), the authors made observations on 108 normal ophthalmic arteries in 80 patients with regard to the origins, courses, branching, morphology and anastomoses of the vessels. The merits and demerits of DSA in observing the ophthalmic artery were discussed. Eye Science 1994; 10: 157- 162.

DSA联合3D ASL对优势侧椎动脉狭窄支架置入前后小脑半球血流动力学改变的评估

目的:探讨DSA联合3D动脉自旋标记技术(ASL)在椎动脉狭窄支架置入前后小脑半球血流动力学评估中的应用价值。方法:回顾性分析21例因优势侧椎动脉颅外段管腔狭窄行支架置入术患者的临床、DSA及ASL资料,评估不同标记后延迟时间(PLD)、椎动脉优势侧与非优势侧、支架置入术前后小脑半球不同供血区脑灌注的变化。结果:21例术前DSA显示优势侧椎动脉重度狭窄,支架置入部位均为优势侧椎动脉颅外段,术后狭窄均解除。PLD为2.5 s时,术前、术后,优势侧及非优势侧,小脑各供血区脑血流量(CBF)值均较PLD为1.5 s时高,差异均有统计学意义(均P<0.05)。术后在椎动脉优势侧,小脑上动脉供血区、小脑前下动脉供血区、小脑后下动脉供血区的CBF值均高于术前(包括PLD=1.5、2.5 s);椎动脉非优势侧,小脑上动脉供血区的CBF值高于术前(包括PLD=1.5、2.5 s)。结论:DSA联合ASL能定量评估小脑半球的血流动力学改变,优势侧椎动脉狭窄支架置入术能提高椎动脉优势侧小脑半球各区的脑血流灌注水平及椎动脉非优势侧的小脑半球小脑上动脉供血区的脑血流灌注水平。

3D-DSA与Dyna-CT在颅内支架置入术中的临床应用研究

目的探讨三维DSA血管成像(3D-DSA)及数字平板造影机的C臂旋转并断层重建技术(DynaCT)在颅内支架置入术患者中的临床应用。方法选择2019年1月-2020年6月厦门大学附属中山医院收治92例颅内动脉狭窄患者,所有患者均行颅内支架置入术治疗,分为对照组(n=38例)和观察组(n=54例)。对照组采用3D-DSA引导,观察组采用DynaCT引导,术后进行12个月门诊随访,比较两组改良Rankin量表(mRS)评分、手术成功率、并发症、支架再狭窄及斑块检出率。结果观察组术后4个月、8个月及12个月mRS评分、支架成形术耗时低于对照组(P<0.05);观察组Dyna-CT的术前规划、观察到支架表面图像与术中所见吻合,手术成功率为83.33%,高于对照组63.16%(P<0.05);两组围术期并发症发生率无统计意义(P>0.05);观察组手术后进行12个月门诊随访,患者支架再狭窄、血管狭窄部位斑块检出率低于对照组(P<0.05)。结论DynaCT用于颅内支架置入术中能改善患者症状,缩短支架成形术耗时,有助于提高手术成功率,未增加并发症发生率,能降低血管狭窄部位斑块检出率,值得推广应用。

DSA引导下经皮入路应用无水乙醇联合聚桂醇治疗头颈部高回流型静脉畸形的安全性和有效性

目的探讨数字减影血管造影(DSA)引导下经皮入路应用无水乙醇联合聚桂醇治疗在头颈部高回流型静脉畸形中的应用效果。方法选取2020年2月至2023年6月在河南大学第一附属医院就诊的68例头颈部高回流型静脉畸形患者,根据治疗方法进行分组,即经DSA引导下经皮入路应用聚桂醇治疗的患者纳入对照组,经DSA引导下经皮入路应用无水乙醇联合聚桂醇治疗的患者纳入研究组。统计两组临床疗效、不良反应及并发症发生情况。结果两组一般资料比较,差异无统计学意义(P>0.05)。与对照组83.33%的临床有效率相比,研究组(97.37%)较高,差异有统计学意义(χ^(2)=4.105,P=0.043)。与对照组43.33%的不良反应及并发症总发生率相比,研究组(10.53%)较低,差异有统计学意义(χ^(2)=9.623,P=0.002)。结论DSA引导下经皮入路应用无水乙醇联合聚桂醇治疗头颈部高回流型静脉畸形安全有效,具有广泛的临床应用前景。

DSA机引导下经皮胃造瘘术治疗吞咽困难患者

回顾性分析莆田学院附属医院2018年5月—2022年5月利用数字减影血管造影(DSA)机引导行经皮胃造瘘术治疗41例吞咽困难患者的情况,统计分析手术成功率、并发症发生率及术前3 d、术后30 d、术后90 d患者的白蛋白(ALB)、总蛋白(TP)、前白蛋白(PA)、体重等指标,探讨DSA机引导下经皮胃造瘘术(Introducer法)治疗吞咽困难患者的安全性和有效性。结果表明,对41例患者实施DSA机引导下经皮胃造瘘术(Introducer法)均获得成功;3例患者出现并发症,并发症发生率为7.32%;术前3 d与术后30 d比较,患者的ALB、TP、PA、体重差异显著(P<0.05);术后30 d与术后90 d比较,各指标差异无统计学意义(P>0.05)。说明DSA机引导下经皮胃造瘘术(Introducer法)成功率高,并发症发生率低,可以提高吞咽困难患者术后的营养指标,有较高的临床应用价值。

CTA与DSA评估慢性肢体威胁性缺血患者全球肢体解剖学分期系统分期的一致性分析

目的分析CTA与DSA在评估慢性肢体威胁性缺血(CLTI)患者全球肢体解剖学分期系统(GLASS)分期中的一致性。方法 回顾性分析2017年1月至2020年12月西安交通大学第一附属医院收治的CLTI患者临床资料。以DSA评估结果为金标准,分析CTA与DSA评估GLASS分期的一致性。结果 CTA评估GLASS评分与DSA具很强的一致性,其中两者评估股腘动脉段评分的加权Kappa系数为0.798(95%CI=0.722~0.873,P<0.01),评估膝下动脉段评分的加权Kappa系数为0.785(95%CI=0.725~0.845,P<0.01),评估GLASS整体评分的加权Kappa系数为0.832(95%CI=0.752~0.911,P<0.01),均显示出很强的一致性。结论 下肢动脉CTA检查可准确评估CLTI患者靶病变GLASS评分和分期,有助于下肢动脉硬化闭塞症诊断及血运重建技术难度评估。

CTA和DSA对Bühler弓检出率的Meta分析

目的评价CTA和DSA对Bühler弓(arc of Bühler,AOB)的检出率和临床意义。方法检索PubMed、Web of Science、Scopus、Embase、Google Scholar、CBM、CNKI、WanFang、VIP、Baidu Scholar数据库,纳入AOB相关的文献,采用Stata 17.0软件进行Meta分析。结果共计纳入11篇文献,包括研究对象3837例(含65例AOB)。AOB的总检出率为1.9%(0.8%~3.2%),CTA显示AOB的总检出率为2.0%(0.5%~4.3%),DSA显示AOB的总检出率为1.8%(0.5%~3.9%)。结论AOB是一种罕见的解剖学变异,在实施相关腹部手术时应考虑到AOB的存在,以免造成操作困难、腹腔脏器缺血或出血等并发症。

基于CTA和DSA评价膈下动脉解剖学变异和临床相关性:一项系统评价和Meta分析

目的:评价基于CT血管成像(CTA)和数字减影血管造影(DSA)的膈下动脉(IPA)解剖学变异的发生率与临床相关性。方法:系统检索PubMed、Web of Science、Scopus、Embase、Google Scholar、CBM、CNKI、WanFang、VIP和Baidu Scholar等数据库,纳入与左、右膈下动脉(LIPA和RIPA)相关的文献,并采用Stata 17.0软件进行Meta分析。结果:共纳入19篇文献,包括6754例患者。IPA共干和单独起源的汇总发生率分别为29.4%(95%CI:24.8%~34.2%)和70.6%(95%CI:65.8%~75.2%);IPA共干以起源于腹主动脉和腹腔干最为常见,汇总发生率分别为48.2%(95%CI:42.4%~54.1%)和49.0%(95%CI:43.3%~54.7%);RIPA单独起源以腹主动脉和腹腔干最为常见,汇总发生率分别为40.9%(95%CI:36.7%~45.3%)和34.8%(95%CI:30.7%~38.9%);LIPA单独起源以腹腔干和腹主动脉最为常见,汇总发生率分别为58.5%(95%CI:53.2%~63.7%)和32.6%(95%CI:27.3%~38.1%)。结论:IPA的起源变异十分丰富,熟悉IPA的起源变异对介入放射学、胃肠病学、外科学和创伤学医师具有十分重要的临床意义。

DSA联合动态增强CT定量分析肝癌HAIC的疗效

目的:探讨DSA联合动态增强CT定量分析和评估肝癌经肝动脉灌注化疗(HAIC)的疗效。方法:临床诊断为原发性肝癌患者50例,均行3次以上HAIC治疗。根据第1次及第3次HAIC治疗前1周内的增强CT,按照改良实体瘤疗效评价标准分为疗效良好组(CR+PR)和疗效不佳组(SD+PD),比较两组治疗前和2次HAIC治疗后DSA造影肝癌的血流动力学参数[染色达峰时间(TP)、峰值密度(PV)、时间-密度曲线上升支斜率(SU)]及CT增强扫描肝癌各期CT值的变化,并进行敏感性分析。对有统计学差异的指标进行Logistic回归分析和ROC曲线分析,以评估判断肝癌HAIC疗效的效能。结果:治疗前,两组间CT值及DSA指标无显著差异(P>0.05)。所有患者均成功完成2次HAIC治疗。第3次HAIC治疗前1周的增强CT,疗效良好组的动脉期和静脉期CT值相比于治疗前显著降低(P<0.05),延时期CT值无显著差异(P>0.05)。第3次HAIC时DSA造影肝癌的血流动力学参数PV与SU显著降低,TP显著延长(P<0.05)。疗效不佳组各项指标差异不显著。回归分析显示,动脉期CT值和DSA造影SU值与疗效显著相关。ROC曲线结果显示,动脉期CT值和SU值是判断疗效的有效指标。结论:DSA造影的SU值和动态增强CT的CT值能够客观地反映HAIC后肝癌的血供变化,且与HAIC疗效相关,可作为评估HAIC疗效的影像学依据。

CCTA与DSA在诊断冠状动脉斑块的临床应用价值

目的:探讨冠状动脉CT血管造影(CCTA)与数字减影血管造影(DSA)在诊断冠状动脉斑块中的应用价值。方法:回顾性选取2020年1月—2023年5月本院诊断为冠心病的患者64例,均行CCTA和DSA检查,以DSA为金标准,分析比较CCTA和DSA对冠状动脉斑块检出率及性质和狭窄程度的诊断价值。结果:64例患者经DSA检出冠状动脉斑块58例(90.63%),其中轻度狭窄21例,中度狭窄23例,重度狭窄14例,无法有效判断动脉斑块性质。经CCTA检出冠状动脉斑块55例(85.94%),其中轻度狭窄19例,中度狭窄22例,重度狭窄14例,12例非钙化斑块、13例混合斑块和30例钙化斑块。以DSA为金标准,CCTA诊断冠状动脉斑块的灵敏度为94.83%、特异度为83.33%、准确度为93.75%、阳性预测值为98.21%、阴性预测值为62.50%、Kappa系数值为0.680。CCTA和DSA在冠状动脉狭窄程度的检出率比较上均无差异(P>0.05)。轻度狭窄者钙化斑块发生率高于中度和重度狭窄者,非钙化、混合斑块发生率低于中度和重度者(P<0.05)。结论:CCTA与DSA在诊断冠状动脉斑块及其狭窄程度上具有高度一致性,但CCTA较DSA对斑块性质的诊断价值更高。