Chemical Thrombolysis in Superior Sagittal Sinus Thrombosis

Introduction to Chemical Thrombolysis

• Chemical thrombolysis should be reserved for severe cases of superior sagittal sinus thrombosis (SSST) with neurological deterioration despite anticoagulation, as it carries higher bleeding risks compared to standard anticoagulation therapy 1

First-Line Treatment: Anticoagulation

• Initial management of SSST should begin with therapeutic anticoagulation using low molecular weight heparin (LMWH) or unfractionated heparin (UFH) immediately upon diagnosis 1
• Anticoagulation is recommended even in the presence of intracranial hemorrhage, as the benefits of preventing thrombus progression outweigh bleeding risks 1
• Anticoagulation should be continued for at least 3 months (treatment phase) 1

Indications for Chemical Thrombolysis

• Consider chemical thrombolysis only when patients show rapid neurological deterioration despite adequate anticoagulation 2, 1
• Consider chemical thrombolysis for extensive thrombus burden with signs of increased intracranial pressure not responding to medical management 1
• Consider chemical thrombolysis for coma or impending herniation due to venous infarction or edema 1

Chemical Thrombolysis Approach

• Direct endovascular thrombolysis involves catheter-directed delivery of thrombolytic agents directly into the thrombosed sinus 2, 3
• Access routes include retrograde approach via internal jugular vein 3, 4

Monitoring During Thrombolysis

• Continuous neurological assessment is essential during the procedure 1
• Serial imaging (CT or MRI) should be performed to monitor for hemorrhagic complications 2, 3
• Venographic confirmation of recanalization should guide the duration of thrombolytic therapy 3, 4

Post-Thrombolysis Management

• Follow-up imaging (MRV or CTV) should be performed to assess recanalization 1
• Monitor for signs of post-thrombotic syndrome 1

Clinical Decision Algorithm

• Confirm diagnosis with MRI/MRV or CT/CTV 1
• Initiate therapeutic anticoagulation with LMWH or UFH 1
• Monitor neurological status closely 1
• If deterioration occurs despite anticoagulation, consider repeat imaging to assess thrombus progression 2, 3
• If chemical thrombolysis is performed, use direct catheter-based approach 3, 4