Division of Neurointervention

Neurointerventional is a subspecialty field of medicine that combines highly specialized skills from the disciplines of Neurology, Neurosurgery, and Neuroradiology to offer minimally invasive therapies for disorders of the brain and spine. The group of neurointerventionalists at Froedtert Hospital and the Medical College of Wisconsin in Milwaukee serves patients with brain aneurysms, arteriovenous malformations (AVM), dural arteriovenous fistulas (dAVF), carotid stenosis, stroke, and other disorders of the blood vessels of the brain and spine.

 Our Team

The Division of Neurointervention at Froedtert Hospital and the Medical College of Wisconsin is home to four neurointerventionalists with training in Neurology, Neurocritical Care, Vascular Neurology, and Endovascular Surgical Neuroradiology. The group provides consultation, evaluation, and follow-up for patients with a broad range of neurovascular conditions including those amenable to minimally invasive image-guided and catheter-based therapies. Located in Wisconsin’s largest academic health center, The Milwaukee Regional Medical Center, the Division of Neurointervention has become a leading referral center for neurovascular care in the Midwest. Extensive participation in landmark national clinical trials has positioned the Division of Neurointervention at the forefront of emerging therapies that are advancing the field.

Sam O. Zaidat, MD
Brian-Fred Fitzsimmons, MD
John Lynch, MD

Marc A. Lazzaro, MD

Glen A. Pollock, MD, DVM

Clinical Fellows 2014-15
Kaiz Asif, MD
Ahsan Sattar, MD
Mazen Noufal, MD
Wled Wazni, MD
Muneer Hassan, MD

Interventional Stroke and Clinical Research Team
Alicia Castonguay, PhD, Team Leader

Fellowship Program Coordinator
Jennifer Richards
(414) 805-9690


Our office can be reached by telephone Monday through Friday from 8 a.m. to 5 p.m. For referrals call Charlie Ann at (414) 805-5219. For referrals for Dr. Lynch or Dr. Fitzsimmons, call Kerry at (414) 805-9236. For emergency physician-to-physician transfers, please call (414) 805-4700.

Clinic appointments are held within the Froedtert West Clinics in the Neurosciences center which is located on the 2nd floor of the Froedtert West Clinic building.

Locations & Directions

New patients are asked to bring the following:

  • Pertinent medical records
  • Prior imaging studies including CT, MRI, angiogram, or ultrasound studies.

Records may also be sent in advance to:

Kerry Jasin or Charlie Ann Rykwalder
Department of Neurology
9200 West Wisconsin Blvd
Milwaukee, WI 53226

Procedures are performed on the second floor of Froedtert Hospital in the Neurointerventional Angiography Suite using one of three biplane angiography machines.


The Division of Neurointervention offers two fellowship programs. See the links below for more details

Neurointerventional Fellowship

 Clinical Trials

Clinical research is essential to advancing healthcare by defining efficacy in treatments and discovering safer and more cost-effective methods of delivering care to patients. The members of the Division of Neurointervention at Froedtert and the Medical College of Wisconsin share this vision and strive to be leaders in clinical trials. The Division of Neurointervention has participated in design and enrollment in numerous national clinical trials evaluating neuroendovascular therapies and devices and has been a top enrollment center in several multi-center randomized trials.

Current enrolling trials include:

The THERAPY Trial: The Randomized, Concurrent Controlled Trial to Assess the Penumbra System’s Safety and Effectiveness in the Treatment of Acute Stroke: Keywords: Stroke, Intervention

Penumbra Separator 3D US 510k Trial: Keywords: Stroke, Intervention

ACE: An Aneurysm Coiling Efficiency Study of the Penumbra Coil 400 System: Keywords: Aneurysm, Coiling, Intervention

DIAS-4: A randomized, double-blind, parallel-group placebo-controlled phase III study to evaluate the efficacy and safety of desmoteplase in subjects with acute ischemic stroke: Keywords: Stroke, Intervention

More information about ongoing neuroscience clinical trials can be found on the Froedtert Web site.


The information on the Division of Neurointervention Web site is for educational purposes only and is not intended as medical advice. While general information regarding the conditions treated and procedures performed is posted, this information is not a substitute for professional medical advice, diagnosis, or treatment. All patients are treated with individualized care based on independent professional judgment and experience in each specific case.

Medical College of Wisconsin
8701 Watertown Plank Road
Milwaukee, WI 53226
(414) 955-8296
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© 2015

Page Updated 02/26/2015