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Purpose: To investigate the midterm stent patency and patient prognosis after stenting for superior mesenteric artery malperfusion complicating with acute aortic dissection. Material and Methods: Thirteen patients who underwent branch vessel stenting for superior mesenteric artery malperfusion between 2011 and 2021 in six institutions were retrospectively reviewed. By comparing pre- and postoperative computed tomography scans in the same plane, the length of the stent implanted in the superior mesenteric artery and the stent-to-vessel diameter ratio were measured. The technical and clinical success of stenting, midterm patient prognosis, and stent patency were evaluated. Results: Superior mesenteric artery stenting was technically successful in 12 patients (92.3%). The mean length of the stents implanted in the superior mesenteric artery was 61.3 ± 39.4 mm (range, 14-127 mm). The mean proximal and distal stent-to-vessel diameter ratios were 1.02 ± 0.16 and 1.30 ± 0.42, respectively. A weak correlation was found between the length of the stents implanted in the superior mesenteric artery and the distal stent-to-vessel diameter ratio (R2 = 0.34). Two major complications occurred, one of which resulted in death within 30 days, and 12 (92.3%) were clinically successful. Of these 12 patients, no recurrent intestinal ischemia occurred during the follow-up duration (mean, 45.2 months). Partial occlusion of the stent distal edge without intestinal ischemia was observed in one patient (distal stent-to-vessel diameter ratio = 2.33) 42 months after stenting. The overall survival rate and primary stent patency rate were 84.6% and 91.7%, respectively. Conclusions: Midterm stent patency and survival after superior mesenteric artery stenting for malperfusion were acceptable.

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Over the past several decades, percutaneous venous stenting has surfaced as the forefront for addressing symptomatic venous outflow obstruction. Stent migration is a very rare, but serious life-threatening complication that can occur with the placement of iliofemoral stents. Life-threatening complications following stent migration include but are not limited to damaged valves, arrhythmias, endocarditis, tamponade, and acute heart failure. Stent failure is seldom understood, but one can attribute it to the incorrect stent and or vein sizing and or the inherent natural forces of the body during respiration. Intravascular ultrasound (IVUS) should be utilized for proper vein and stent sizing prior to placement and patients should be monitored more closely after the procedure. Stent retrieval can be very difficult, as the procedure must consider the location of the migrated stent and the comorbidities associated with the patient. This case report explains an 81-year-old Caucasian male who presented to the Emergency Department with dizziness and dyspnea on exertion. Upon further evaluation via transesophageal echocardiogram, he was found to have severe tricuspid regurgitation and an iliofemoral venous stent located in the right ventricle of the heart.

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BACKGROUND: Neurovascular compression syndromes (NVCS), encompassing conditions such as trigeminal neuralgia, hemifacial spasm, and glossopharyngeal neuralgia, significantly impair patient quality of life through abnormal vascular compression and micro-pulsation of vasculature on cranial nerves at the Obersteiner-Redlich zone. The modulation of pulsatile flow dynamics via endovascular stents presents a novel research frontier for alleviating these syndromes. AIM: The primary aim of this investigation was to delineate the impact of various endovascular stents on pulsatile flow within an in vitro model of a blood vessel, thereby elucidating their potential applicability in the therapeutic management of NVCS. MATERIALS AND METHODS: A simple in vitro analog of a posterior circulation artery was developed, employing an intravenous pump to replicate cardiac-induced blood flow. Within this model, alterations in pulsatile flow were quantitatively assessed following the introduction of three categorically distinct endovascular stents, varying in size. This assessment was facilitated through the employment of both micro-Doppler and Doppler ultrasound methodologies. RESULTS: The Pipeline 5x35 mm stent (Medtronic, Minneapolis, MN) demonstrated the most significant reductions in peak systolic velocity (Vmax) and pulsatility index (PI), PI especially over the stent, suggesting its potential for drastically altering blood flow dynamics. Similarly, Neuroform Atlas 4.5x30 mm and Neuroform Atlas 4x24 mm stents (Stryker, Kalamazoo, MI) also showed notable decreases in hemodynamic parameters, albeit to different extents. Statistical analysis confirmed that these changes were significantly different from the control (P < 0.0001 for PI and Vmax; P < 0.05 for inter-stent comparisons), except for proximal PI means, which did not significantly differ from the control (P = 0.2777). CONCLUSION: These findings affirm the potential of endovascular stents to substantially modulate arterial pulsatility. The observed decrease in pulsatile flow resultant from endovascular stent application has the potential to attenuate ectopic nerve excitation, a hallmark of NVCS. Consequently, this research highlights the prospective utility of endovascular stents in developing minimally invasive therapeutic approaches for NVCS.

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Idiopathic superior mesenteric vein (SMV) stenosis, where no clear causative factor is identifiable, remains a clinical rarity. We present a detailed case report of a patient with idiopathic stenosis of the SMV who underwent successful endovascular stenting. This report outlines the patient's clinical presentation, diagnostic imaging findings, procedural approach by the interventional radiology team, and subsequent management. Endovascular stenting is a viable therapeutic option for patients with idiopathic SMV stenosis. This case demonstrates that with appropriate interventional and post-procedural management, long-term stent patency and thrombosis prevention can be achieved. The success of this case encourages further investigation into endovascular treatments for venous stenoses.

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Subclavian steal syndrome results from subclavian artery stenosis that results in retrograde blood flow through the ipsilateral vertebral artery. Rarely, this retrograde flow can affect the vertebrobasilar junction and cause vertebrobasilar insufficiency, ischemia, and even aneurysm formation. We describe a unique presentation of a vertebrobasilar aneurysm presenting with subarachnoid hemorrhage in the setting of subclavian steal syndrome. The subclavian stenosis was endovascularly managed, with complete resolution of both retrograde flow and the dissection itself. Reestablishment of native flow mechanics in the subclavian artery may treat aneurysms at the vertebrobasilar junction, potentially eliminating the need for further interventions.

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INTRODUCTION: Symptomatic intracranial hypertension (IH) due to venous outflow obstruction secondary to dural venous sinus (DVS) tumoral invasion affects up to 3% of intracranial meningioma patients. The literature regarding endovascular therapies of such patients is limited to a few case reports and a recent single-centre case series. PURPOSE: We describe our single-centre experience of endovascular therapy in patients with clinically symptomatic IH secondary to DVS meningioma invasion. METHODS: We performed a retrospective review of clinical and radiological data of all patients with refractory IH and meningiomas invading the DVS who were referred for possible DVS venoplasty and stenting. Seven endovascular procedures in six female patients were done. Presumed secondarily induced lateral transverse sinus stenosis was also stented in four patients as part of the primary intervention. RESULTS: All patients experienced complete symptomatic resolution at 6-month follow-up. Five patients had no symptom recurrence over a mean follow-up period of 3.5 years. One patient with multiple meningiomas developed recurrent IH 2 years following stenting secondary to in-stent tumour re-invasion. This was re-stented with consequent 6 months post-retreatment symptomatic relief at the time of writing. No procedure-related complications occurred. CONCLUSION: In the setting of DVS stenosis secondary to meningioma invasion, endovascular therapy is a safe and successful therapeutic option with promising mid-term results. The procedure should be considered in cases where complete surgical tumour resection is unlikely or carries a significant risk. If present, secondarily induced stenoses at the lateral ends of the transverse sinuses should also be considered for treatment.

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Background: Antiphospholipid syndrome is a complex autoimmune condition associated with the formation of recurrent thrombosis in any vascular bed throughout the body. Jugular vein thrombosis is very rare with only a 0.9% occurrence and is not typically associated with cerebrospinal rhinorrhea as a result of raised intracranial pressure. Case Description: A 54-year-old patient presented with a 9-month history of cerebrospinal fluid (CSF) rhinorrhea and headache on a background of antiphospholipid syndrome. Investigations showed a superior vena cava (SVC) and right internal jugular vein (IJV) obstruction with moderately elevated intracranial venous pressures. Her magnetic resonance imaging (MRI) brain was consistent with a CSF leak. The patient underwent successful endovascular stenting of her obstructed SVC and right IJV followed by surgical repair of a herniating meningocele in the posterior left ethmoid air cells. Conclusion: CSF rhinorrhea is uncommon and never previously reported associated with SVC thrombosis induced by antiphospholipid syndrome. A combination of endovascular techniques and surgical repair is recommended for this challenging presentation.

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BACKGROUND: The impact of type B acute aortic dissection (TBAAD) on historical pre-TBAAD diameters of the thoracic aorta is rarely reported. The aim of this study was to assess the extent of changes in aortic diameters induced by dissection, measured with a computed tomography (CT) scan obtained before and after TBAAD. METHODS: Between January 2004 and December 2014, CT angiography of 50 non-Marfan patients with nonbicuspid aortic valves diagnosed with TBAAD were compared to historical CTs on file. RESULTS: The ascending aorta and proximal arch showed negligible change. The proximal, mid, and distal aorta diameters changed compared with predissected values (107.7 ± 4.8%, 109.3 ± 4.9%, and 105.7 ± 5.8%, respectively). Neither sex, false lumen status, or mural calcification, nor prior thoracoabdominal aortic ectasia, correlated with the diameter change. Age ≥80 years in the proximal descending aorta did correlate with the diameter change (110.7 ± 4.0% vs 106.1 ± 4.6% p = 0.01). CONCLUSIONS: Although identifying predicting factors for an aortic diameter increase all along with the thoracic aorta was still challenging, the degree of diameter change by aortic dissection was 105.7% to 109.3% in descending thoracic aorta, most prominent in middle descending aorta.

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Blue toe syndrome can occur due to distal embolization from proximal lesions such as an aortic thrombus. We describe the case of a patient who presented with chronic limb threatening ischemia due to a flow-limiting infrarenal aortic thrombus, with gangrene from distal embolization to the left fifth toe, and was successfully treated with endovascular aortic stent graft insertion. Distal embolization during instrumentation was successfully prevented by using a partially deployed Wallstent (Boston Scientific) as an embolic protection device. The reconstrainable Wallstent device can be considered for distal thromboembolic protection during aortic stenting, in particular, when distal embolization is a concern and commercial devices are not readily available.

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BACKGROUND: The duplicated middle cerebral artery (DMCA), a rare anatomical variant of the middle cerebral artery, arises between the anterior choroidal artery and the distal end of the internal carotid artery. We present the case of a patient who had an acute progressive stroke caused by severe stenosis in the initial segment of the DMCA and was successfully treated with endovascular stenting. CASE PRESENTATION: A 57-year-old man was admitted to our hospital with sudden left extremity weakness for three days. Cranial magnetic resonance imaging revealed multiple fresh infarcts in the right basal ganglia and temporal lobe. Cerebrovascular imaging revealed severe stenosis of the right DMCA's initial segment. However, despite standard medical therapy, the patient's limb weakness worsened. Based on the clinical and imaging findings, we speculated that severely stenotic DMCA is responsible for the acute progressive stroke. On the basis of the best medical treatment, the patient successfully underwent endovascular stent implantation under general anesthesia two weeks after the onset. The patient's condition was stable after interventional therapy, and his postoperative follow-up prognosis was favorable. CONCLUSIONS: Endovascular stenting may be a feasible treatment for symptomatic severe stenosis of the DMCA in cases of poor control with standard medications.

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Treatment of venous aneurysms involving the iliac and femoral veins has generally been an open surgical approach, with a few case reports noting use of an endovascular approach. We report three cases: (1) a patient with an iliocaval occlusion involving an occluded TrapEase filter who presented with a large left external iliac vein aneurysm; (2) a patient with a left common femoral vein aneurysm; and (3) a patient with left profunda femoris vein aneurysms with associated pulmonary embolism. All three patients were successfully managed with the use of appropriately sized bare metal woven stents (Wallstents; Boston Scientific). Their clinical presentation, technical considerations, and outcomes are reviewed.

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May-Thurner syndrome, also known as iliocaval compression syndrome, is a rare vascular condition that involves compression of the left common iliac vein by the right common iliac artery. This compression can lead to venous stasis and increase the risk of deep vein thrombosis in the left lower extremity. Treatment options range from conservative measures to endovascular procedures such as venous stenting. Here, we present the case of a 45-year-old female with a history of recurrent deep vein thrombosis in her left leg, who arrived at the emergency department with swelling, pain, and tenderness. She was on warfarin therapy for deep vein thrombosis management. Physical examination and laboratory investigations supported the diagnosis of acute deep vein thrombosis. Further investigations revealed May-Thurner syndrome, with the left common iliac vein being compressed by the right common iliac artery, leading to extensive thrombosis in the left lower extremity. Endovascular stenting was performed to relieve the obstruction and restore venous blood flow. The patient's symptoms improved after the stenting procedure, and she remained asymptomatic during follow-up with continued anticoagulation therapy. Awareness of May-Thurner syndrome is crucial, especially in patients with recurrent deep venous thrombosis and anatomical risk factors. Successful management requires a multidisciplinary approach involving anticoagulation therapy and endovascular stenting.

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Spontaneous subclavian artery dissection (SCAD) is a rare clinical observation with very few cases reported in the medical literature. We describe a rare case of a 50-year-old female patient who presented with symptoms of critical limb ischemia of the right upper extremity. A digital subtraction angiogram (DSA) revealed a dissection in the proximal course of the subclavian artery (SCA). Prompt recanalization with endovascular therapy produced an excellent result.

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Abernethy malformation (congenital extrahepatic portosystemic shunt [CEPS]) is rare and is characterized by an aberrant connection between the portal and systemic veins, bypassing the liver. It can have varying presentations and can lead to severe complications if left untreated. It is usually diagnosed incidentally on abdominal imaging. Occlusion venography and measurement of portal pressures (pre- and postocclusion) is an important step in management. Complete occlusion of the malformation in cases where the portal veins in the liver are very small and the gradient is more than 10 mm Hg, can potentially lead to acute portal hypertensive complications, such as porto-mesenteric thrombosis. We report a case of Abernethy malformation diagnosed on an abdominal computed tomography scan that presented with neurological symptoms and was successfully managed by interventional radiology via endovascular closure through placement and sequential occlusion of 2 metal stents.

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Purpose: To study and compare the clinical outcomes of endovascular therapy with those of hybrid surgery in the treatment of Trans-Atlantic Inter-Society Consensus II (TASC II) D aortoiliac occlusive disease (AIOD). Patients and Methods: Patients with TASC II D-type AIOD who underwent their first surgical treatment at our hospital between March 2018 and March 2021 were enrolled and followed up to evaluate the improvement in symptoms, complications, and primary patency. The Kaplan-Meier method was used to compare the differences in primary patency between the treatment groups. Results: In total, 132 of 139 enrolled patients (94.96%) achieved technical success following treatment. The perioperative mortality rate was 1.44% (2/139), and postoperative complications occurred in two patients. Among the patients who successfully underwent surgery, 120 underwent endovascular treatment (110 patients with stenting and 10 patients with thrombolysis before stenting), 10 underwent hybrid surgery, and 2 underwent open surgery. The follow-up data were compared between the endovascular and hybrid groups. At the end of the follow-up period, the patency rates in the hybrid and endovascular groups were 100% and 89.17% (107/120), respectively. The endovascular group achieved primary patency rates of 94.12%, 92.44%, and 89.08% at 6, 12, and 24 months postoperatively, respectively, whereas the primary patency rate remained at 100% in the hybrid group, with no significant variation between the endovascular and hybrid groups (P = 0.289). The endovascular group was further divided into a stent subgroup (110 patients) and a thrombolysis/stent subgroup (10 patients), and no prominent variation was noted in the primary patency between the two subgroups (P = 0.276). Conclusion: Although open surgery is the gold standard treatment for TASC II D-type AIOD, endovascular and hybrid treatments are feasible and effective. Both methods showed good technical success and early to midterm primary patency rates.

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Key Clinical Message: Complex presentations of MCS patients may necessitate a multidisciplinary approach involving HF cardiologists, CT surgeons, advanced cardiac imagers, and interventional cardiologists in order to define the optimal management strategy. Abstract: Left ventricle assist devices (LVADs) provide life-sustaining treatment for patients with terminal heart failure, but their intricacy allows for complications. One complication is LVAD outflow graft obstruction due to the graft's intraluminal thrombus or extraluminal compression. It may be treated endovascularly with stenting. We report an endovascular stenting of an outflow tract in HVAD™ (HeartWare Inc.) due to a pseudoaneurysm causing compression and kinking stenosis.

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Pelvic venous disorders (PeVD), previously known by various imprecise terms including pelvic congestion syndrome, have historically been underdiagnosed as a cause of chronic pelvic pain (CPP), a significant health problem associated with reduced quality of life. However, progress in the field has helped to provide heightened clarity with respect to definitions relating to PeVD, and evolution in algorithms for PeVD workup and treatment has been accompanied by new insights into the causes of a pelvic venous reservoir and associated symptoms. Ovarian and pelvic vein embolization, as well as endovascular stenting of common iliac vein compression, should be considered as management options for PeVD. Both treatments have been shown to be safe and effective for patients with CPP of venous origin, regardless of age. Current therapeutic protocols for PeVD exhibit significant heterogeneity owing to limited prospective randomized data and evolving understanding of the factors driving successful outcomes; forthcoming clinical trials are anticipated to improve understanding of CPP of venous origin as well as algorithms for PeVD management. This Expert Panel Narrative Review provides a contemporary update relating to PeVD, summarizing the entity's current classification, diagnostic workup, endovascular treatments, management of persistent or recurrent symptoms, and future research directions.

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Malignant superior vena cava syndrome (SVCS) is no longer considered a medical emergency in most cases because it rarely leads to life-threatening complications. However, it results in disturbing symptoms that can significantly affect patients' quality of life. Treating this condition effectively while minimising treatment-related morbidity is of increasing importance as cancer patients are living longer from advances in oncological treatments. This clinical practice review discusses the implications of these advances on the decision to consider stenting as the initial treatment for SVCS. Stenting is increasingly popular as it provides quick symptomatic relief with low rates of complications. Systemic treatments have evolved in the past two decades with the development of immunotherapy and targeted therapies that have different response patterns compared to conventional chemotherapy. Furthermore, major changes have also been seen in radiotherapy techniques that allow treatments to better conform to targets while sparing normal tissues. These advances have changed practice patterns for stent placement in SVCS patients in both the localised and metastatic settings. Prospective studies using standardised patient-reported outcome tools are needed to determine the optimal treatment sequence for SVCS patients, as current recommendations are mainly based on retrospective single-arm studies. An individualized approach with multidisciplinary input is therefore important to optimize patient outcomes before more robust evidence is available.

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Aortoenteric fistulas (AEF) represent a rare, life-threatening cause of gastrointestinal bleeding with an incidence of 0.007 per million. Iliac artery-enteric fistulas represent an even more uncommon variant of AEFs. Prompt diagnosis and intervention are required to prevent associated morbidity and mortality. Herein, we report a rare case of iliac-enteric fistula in a patient with hematochezia.

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This report highlights the use of novel endovascular techniques in a 68-year-old male patient with massive hematemesis from a recurrent secondary aorto-enteric fistula (SAEF). With a prior history of infrarenal aortic ligation and the location of the SAEF being at the aortic sac, we explain the considerations for the techniques used and how we were able to stop the bleeding using percutaneous transarterial embolotherapy.