Abstract 1122‐000170: Stent Retrievers Utilization in Endovascular Treatment of Cerebral Venous Sinus Thrombosis
Authors: Amireh Abdallah O , Ali Hassan , Nagy Muhammad , Mehta Siddhart , Zacharatos Haralabos , Fourcand Farah , Kirmani Jawad 
Published: December 2021

Introduction
: Patients with Cerebral Venous Sinus Thrombosis (CVT) are candidates for Endovascular Mechanical Thrombectomy (EMT) in cases of coma on presentation or clinical deterioration despite anticoagulation. We present two cases of CVT successfully treated with mechanical thrombectomy using Medtronic’s Solitaire Stent retriever.

Methods
: A retrospective review at a single center university hospital was performed for all cerebral venous sinus thrombosis case log from December 2018 to November 2020. Cases resistant to conventional medical therapy that underwent intrasinus stent retriever endovascular thrombectomy were noted.

Results
: Case 1: 26 year‐old male with a history of hypertension presented with 2 weeks of headaches, left sided numbness and blurriness of vision. Imaging revealed superior sagittal (SSS) and bilateral transverse sinus thrombosis. Patient was treated with heparin infusion and discharged home on oral apixaban. The following day he presented with new onset expressive aphasia. Imaging was unchanged. Due to worsening symptoms despite anticoagulation, Patient underwent mechanical thrombectomy using a stent retriever. Solitaire 6 × 40 mm stent was advanced and deployed through the microcatheter and retracted in the upper segment of posterior one third of SSS followed by alteplase infusion at 1 mg/hr (25 ml/hr) via Berenstein catheter for the next 36 hours. Intravenous heparin infusion was also started with aPTT goal 60–80. Cerebral angiogram was repeated two days later revealing successful recanalization of previously thrombosed SSS and bilateral transverse sinuses with significantly improved cerebral venous drainage. Patient was transitioned again to oral apixaban. Repeat CTA in 3 months showed significantly improved patency and recanalization.

Case 2: A 42 year‐old male with history of ulcerative colitis presented with sudden onset right‐sided hemiparesis and hemisensory loss along with one month of headaches. Presenting NIHSS 14. Imaging revealed SSS thrombosis with thrombosis of the left transverse sinus complicated by left frontal intraparenchymal hemorrhage and subarachnoid hemorrhage. Patient underwent mechanical thrombectomy of SSS using Solitaire 6 × 40mm stent retriever with distal aspiration resulting in improved flow. Clinical course was complicated by seizures and acute respiratory distress syndrome requiring intubation followed by tracheostomy and G‐tube placement which were eventually removed during recovery. Patient was treated with high intensity heparin during his hospitalization and eventually transitioned to apixaban. Work up revealed protein S deficiency. Serial CT angiograms at 6 and 11 months revealed resolution of CVT. NIHSS improved to 1 with mRS of 2.

Conclusions
: These cases imply that intra‐cerebrovenous sinus mechanical thrombectomy with stent retrievers may be considered in patients with continuing worsening despite optimal medical management.