Life-threatening bilateral internal carotid artery and unilateral vertebral artery total occlusion presenting with dizziness: a case report

Introduction: It is well known that whereas bilateral occlusion is less common, unilateral internal carotid artery blockage happens regularly. Asymptomatic to fatal ischemic stroke can be the clinical presentation, depending on whether there is adequate collateral blood flow. Internal carotid artery occlusion is often associated with significant neurologic events, both at the time of initial occlusion and during follow-up. Case presentation: We describe a patient’s experience of dizziness followed by a fall. The hyperdense position of the basilar artery near its bifurcation was identified following a CT scan. Furthermore, the pons, midbrain, and medial parts of the right temporal lobe showed numerous small hypodensities suggestive of an ischemic injury. The patient had medical treatment without surgery after it was determined that they had bilateral internal carotid arteries and a blocked right vertebral artery. After taking dual antiplatelet therapy for five days, the patient recovered without incident and was discharged from the hospital. Discussion: In a young patient with bilateral internal carotid arteries occlusion (BICAO), we highlighted the significance of prompt diagnosis of stroke-like symptoms, diagnostic possibilities, and treatment options. Options for diagnosis include brain MRI and CT head to check for ischemia and CTA head and neck to assess for artery obstruction. Options for treatment include severe medical and surgical treatments, such as carotid endarterectomy, stent implantation, or balloon angioplasty, or medical management alone, such as dual anti-platelet medication and thrombolysis. Conclusion: BICAO is associated with a grave prognosis and significant cerebrovascular complications. High-quality studies are needed to establish the best treatment strategy, considering the complex and individualized nature of the condition.