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Dr. Dewansh Mishra - Best Interventional Neuroradiologist
Dr Dewansh Mishra
Interventional Neuro-radiology Neurosciences :
Experience: 4+ Years
Education: MBBS, MD (Radiodiagnosis) DM (Neuroimaging and Interventional Neuro Radiology)
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9:00 - 17:00 Mon - Sat
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About Dr Dewansh Mishra

Dr. Dewansh Mishra is a highly skilled Interventional Neuroradiologist with an MBBS and MD in Radiodiagnosis, and a DM in Neuroradiology from the prestigious Sree Chitra Tirunal Institute for Medical Sciences and Technology (SCTIMST), Trivandrum. With over 6 years of experience in radiology, including specialized training in diagnostic and interventional neuroradiology, he has expertise in the management of stroke, brain aneurysms, vascular malformations (AVMs, dAVFs), spinal vascular disorders, and craniofacial vascular malformations. Dr. Mishra is proficient in advanced endovascular procedures such as mechanical thrombectomy, aneurysm coiling, flow diversion, and embolization therapies including AVM embolization and MMA embolization.

His postdoctoral thesis focused on brain dural arteriovenous fistulas and cognitive function analysis, highlighting the neurocognitive implications of these vascular lesions. Dr. Mishra has also contributed significantly to neuroradiological research, including a study on the role of MRA in carotid-cavernous fistulas (CCF), and has identified the central non-enhancement sign in imaging of carotid body tumors, aiding in improved diagnostic accuracy.

An executive member of ISVIR-UP (Indian Society of Vascular and Interventional Radiology – Uttar Pradesh chapter), Dr. Mishra actively participates in academic initiatives and training programs. He is dedicated to delivering compassionate, evidence-based, and minimally invasive care aimed at improving neurological health and patient outcomes.

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Experience
• Over 4 Years of Clinical Experience and Counting…• Formerly at Dr RMLIMS Lucknow• Formerly at Sree Chitra Tirunal Institute for Medical Sciences and Technology, Trivandrum

Special interest

•Acute Ischemic Stroke InterventionExpertise in mechanical thrombectomy and advanced imaging protocols for timely and effective stroke management.•Intracranial Aneurysm ManagementSpecializes in minimally invasive techniques including coiling and flow diversion.• Cerebral and Spinal Vascular Malformations:• Endovascular treatment of AVMs, dAVFs, and complex spinal vascular disorders.•Carotid-Cavernous Fistulas (CCF)•MMA embolization for recurrent SDH.

Research & Publications

01
1. Evaluating the diagnostic performance of non- contrast magnetic resonace angiography sequence in the pre - procedural comprehensive analysis of direct carotid cavernous fistula. 2. Central Nonenhancement Sign in Carotid Body Tumor on CT Angiography. 3. Assessment of White Matter of Brain in Refractory Epilepsy Patients with Diffusion Tensor Imaging. 4. Cognitive Assessment of Refractory Patients using MOCA Scale. 5. Prevalence and Distribution of Coronary Dominance and Ramus Intermedius in North Indian Population on CT Coronary Angiography - A Cross- sectional Study. 6. Imaging of Intra Medullary Spinal Cord Lesions on MRI. 
Clinical Expertise
Acute ischemic stroke (large vessel occlusion)
Intracranial aneurysms
Brain and spinal arteriovenous malformations (AVMs)
Dural arteriovenous fistulas (dAVFs) of brain and spine
Pial arteriovenous fistulas (pial AVFs)
Carotid and vertebral artery stenosis
Vein of Galen malformations
Carotid-cavernous fistulas (CCFs)
Idiopathic intracranial hypertension (IIH)
Craniofacial and scalp vascular malformations
Head and neck vascular tumors preoperative embolization (e.g., meningiomas, paragangliomas)
Cerebral vasculitis (diagnosis and evaluation)

Doctor Location

Apollo Hospitals Lucknow

FAQs

Q: What is interventional neuroradiology and which brain and spine conditions does it treat?
This is a subspecialty using image-guided catheters to treat neurological diseases from inside the blood vessels. It treats strokes, brain aneurysms, and Arteriovenous Malformations (AVMs). It also manages spinal vascular disorders and dural fistulas that can cause paralysis if left untreated.
Q: What is a cerebral aneurysm coiling procedure and how is it different from open brain surgery?
Coiling is a pinhole procedure where platinum coils are packed into an aneurysm via a leg artery. Unlike open surgery, it requires no skull opening or brain retraction. This reduces physical trauma, eliminates head scarring, and leads to a much faster recovery for the patient.
Q: What is mechanical thrombectomy for stroke and what is the treatment window for best outcomes?
This is an emergency procedure to physically pull a blood clot out of a blocked brain artery. The ideal treatment window is within 6 hours of symptom onset, though some patients benefit up to 24 hours. Rapid intervention is the key to reversing paralysis and saving brain tissue.
Q: What are arteriovenous malformations (AVMs) in the brain and can they be treated without open surgery?
AVMs are dangerous tangles of blood vessels that can rupture and cause brain bleeds. Dr. Mishra can often treat these through embolization, using medical glue to seal the vessels from within. This endovascular path is a vital, less invasive alternative to traditional surgical removal.
Q: What is carotid artery stenting and who needs it to prevent a stroke?
This procedure involves placing a mesh tube to open a narrowed neck artery and restore blood flow. It is for patients with severe carotid stenosis who are at high risk of a stroke. It acts as a preventative shield by stabilizing plaque and keeping the artery open.
Q: What neuroendovascular procedures does Dr. Dewansh Mishra perform for stroke and vascular brain conditions?
He performs mechanical thrombectomy for acute strokes, aneurysm coiling, and flow diversion. His expertise also includes embolization for AVMs and dAVFs, as well as MMA embolization for chronic brain hematomas. These procedures target complex vascular pathologies with millimeter precision through minimally invasive access.
Q: What role does Dr. Dewansh Mishra play in the acute stroke intervention pathway at Apollo Hospitals?
He is the lead interventionalist in the Code Stroke protocol. Once a stroke is identified, he performs the emergency thrombectomy to reopen the blocked vessel. His role is critical in the multidisciplinary chain that ensures rapid imaging, diagnosis, and life-saving arterial recanalization.
Q: What advanced neuroimaging techniques does Dr. Dewansh Mishra use to plan cerebrovascular interventions?
He utilizes non-contrast MRA to map direct carotid-cavernous fistulas and Diffusion Tensor Imaging (DTI) to assess brain white matter. These advanced protocols allow him to visualize the microscopic impact of vascular lesions, ensuring a tailored and safer surgical plan for every patient.
Q: When should a neurologist refer a patient to an interventional neuroradiologist like Dr. Dewansh Mishra?
Referrals are necessary for any vascular brain lesion, such as a suspected aneurysm or an AVM found on a scan. Patients with recurrent brain bleeds or those requiring urgent clot removal during a stroke must be directed to an interventional neuroradiologist immediately for specialized endovascular care.
Q: How can patients access Dr. Dewansh Mishra's neuroradiology expertise at Apollo Hospitals Lucknow?
Patients can schedule a consultation from 09:00 to 17:00, Monday to Saturday. Appointments are managed through the Apollo portal or the neuroradiology desk. It is essential to bring all digital MRI and CT films on a CD for a comprehensive vascular review.
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