Comprehensive Stroke Center Staff

Karen Furie, MD
Chair and Neurologist-in-Chief

Brian Silver, MD
Director, Stroke Center

Matthew Siket, MD
Co-Director, Comprehensive Stroke Center Emergency Medicine

Curtis Doberstein, MD
Director, Vascular Neurosurgery

Brad Thompson, MD
Director, Division of Neurocritical Care

Mahesh Jayaraman, MD
Director, Interventional Neuroradiology

Corey Fehnel, MD
Neurocritical Care

Muhib Khan, MD
Vascular Neurology

Ali Saad, MD
Vascular Neurology

N. Stevenson Potter, MD
Division of Neurocritical Care

 Linda Wendell, MD
Division of Neurocritical Care

Tracey Madsen, MD
Emergency Medicine

Caryn Amedee, SCRN
Assistant Clinical Manager, Neurology/Stroke Program

Joan Walsh, CNRN, SCRN
Neuroscience Nursing Quality and Safety Manager

Jo-Ann Sarafin, SCRN
Stroke Program Manager

Naomi Thovmasian Marsh
Administrative Coordinator, Stroke Center

 
Chief of Neurology; Rhode Island, The Miriam and Bradley hospitals

Matthew Siket, MD, is co-director of the emergency center stroke centers at Rhode Island and The Miriam hospitals, and is an assistant professor of emergency medicine at The Warren Alpert Medical School of Brown University. His primary research interest is in risk stratification in transient ischemic attack.

Siket completed his residency in emergency medicine at Alpert Medical School, and a fellowship funded by the National Institutes of Health in the specialized program of translational research in acute stroke (SPOTRIAS) within the Department of Neurology at Harvard Medical School and Massachusetts General Hospital. Siket received his master in science in interdisciplinary biomedical science from the University of Medicine and Dentistry of New Jersey, New Jersey Medical School, in Newark, New Jersey.

Director, Cerebrovascular and Skull-Base Surgery

Curtis Doberstein, MD is the director of cerebrovascular and skull-base surgery at Rhode Island Hospital and executive vice-chair of clinical operations. In addition, Dr. Doberstein is director of the Neurosurgery Residency Program and professor of neurosurgery at The Warren Alpert Medical School of Brown University. Dr. Doberstein received his medical degree in 1988 from McGill University in Montreal and completed his residency in neurosurgery and fellowship at the University of California at Los Angeles.

Dr. Doberstein has been board-certified by the American Board of Neurosurgery since 2000. He served as interim chairman of neurosurgery at the Warren Alpert Medical School of Brown University from 2007 to 2010. In 1995, Dr. Doberstein joined the Neurosurgery Foundation and the Warren Alpert Medical School of Brown University. He is an associate professor (clinical) in the department of neurosurgery at Brown and serves as the Brown University neurosurgery residency program director. He directs the section of vascular neurosurgery at Rhode Island Hospital. He is an active member of the American Association of Neurological Surgeons and Congress of Neurologic Surgeons and serves as a MOC/CME committee member for the American Association of Neurological Surgeons.

Dr. Doberstein specializes in surgery on the blood vessels of the brain, neck and spinal column. He sees many patients with circulatory problems such as aneurysms, arteriovenous malformations and carotid artery disease. He also treats patients with nervous system tumors, including those of the brain and the skull base. Patients with degenerative spine disorders comprise another large part of his practice.

Research Interests

Dr. Doberstein, MD has conducted research on apoptosis after stroke and cerebral metabolic alterations following closed head injuries.

At present, he is investigating clinical outcomes following the removal of plaque from a carotid artery. He has performed more than 500 of these surgeries. Specifically, he is exploring the feasibility of same-day discharge after carotid endarterectomry.

Professional Papers

  • Group B Beta-Hemolytic Osteomyelitis of the Heel: A Case Report. Doberstein C, MacEwen GD, Lee MS Clin Orthop 213:225-228 1988
  • Intraoperative Angiography in Cerebrovascular Surgery. Martin NA, Doberstein C, Bentson J, Vinuela F, Dion J, Becker DP Clin Neurosurg 37:312-331 1990
  • Cystic Neoplasms of the Pancreas. Doberstein C, Kirchner R, Gordon L, Morgenstern L, Shapiro S Mt. Sinai J.Med 57:102-106 1990
  • Post-traumatic Cerebral Arterial Spasm: Transcranial Doppler Ultrasound, Cerebral Blood Flow, and Angiographic Findings. Martin NA, Doberstein C, Caron M, Zane C, Thomas K, Becker DP J. Neurosurg, 77:575-583 1992
  • Clinical Considerations in the Doberstein C, Hovda DA, Becker DB Ann Emerg Med, 22:993-997 1993
  • Metabolic Alterations Accompany Ionic Disturbances and Cellular Doberstein C, Fineman I, Hovda DA, Martin NA, Keenly L, Becker DP Acta Neurochir (Suppl)60:41-44 1994
  • Cerebral Blood Flow Measurement in Martin NA, Doberstein C Neurosurg Clin N. Amer, 5(4):607-618 1994
  • Post-traumatic Cerebral Arterial Spasm Martin NA, Doberstein C, Alexander MJ, Khanna R, Benzalcazar H, Alsina G, Zane C, McBride D, Kelly D, Houda D, Becker DB, McArthur D, Zavcha K J Neurotrauma, 12(5): 897-901 1995
  • Temporally Associated Rupture of Guglielmo MA, Doberstein C A Case Report. J.1998
  • The temporal Profile and Morphologic Features of Neuronal Death in Human Stroke Resemble Those Observed in Experimental Forebrain Ischemia: The Potenial Role of Apoptosis. Guglielmo MA, Chan PT, Cortez S, Stopa E, McMillan P, Johanson CE, Epstein M, Doberstein CE Neurol Res 20:289-296 1998
  • Therapeutic Embolization Arteriovenous Malformations: The Case For and Against Martin N, Khanna R, Doberstein C, Benston J. Clinical Neurosurgery, Vol. 46, 295-318 1998
  • Assessment of the Value of MR Imaging for Examining Patients with Angiographically Negative Subarachnoid Hemorrhage Rogg JM, Smeaton S, Doberstein C, Goldstein JH, Tung GA, Haas RA AJR 172:201-206 1999
  • Intracanalicular Aneurysm of the Anterior Inferior Cerebellar Artery Revealed by Multi- Detector CT Angiography. Jayaraman MV, Mayo-Smith WW, Doberstein CE AJR Am J Neuroradiol 24(7): 1338-40 2003
  • Recovery of choroid plexus function in aged rats subjected to transient forebrain ischemia Johanson C, Palm D, Doberstein C, Stopa E Neurosci. Lett., in press.
  • Sustained CA1 Neuronal Survival by FGF-Z Following Forebrain Ischemia In The Rat: A Possible Role For The Choroid Plexus-CSF System. Hayamizv T, Chan PT, Doberstein C, Sunwoo L, Guglielmo MA, Hayamizv T, Chan PT, Doberstein C, Sunwoo L, Guglielmo MA, Hayamizv T, Chan PT, Doberstein C, Sunwoo L, Guglielmo MA, Johanson, CE. Neurological Research
  • Spontaneous thrombosis of a cerebral arteriovenous malformation: A case report. Sungarian A, Doberstein C, Haas R Scandanavian J. Nsurg.
Director Neuro Critical Care

Bradford Thompson, MD is the director of the division of neurocritical care at Rhode Island Hospital and an assistant professor of neurology and neurosurgery at The Warren Alpert Medical School of Brown University.

His research interests include studying outcomes in patients with intracerebral hemorrhage and traumatic brain injury. He has been involved in numerous clinical trials focusing on clinical research in acute stroke patients, including the use of desmoteplase in acute ischemic stroke, the use of high-flow oxygen in ischemic stroke and antihypertensive treatment in acute cerebral hemorrhage. He has also participated in trials evaluating endarterectomy versus carotid stenting in patients with carotid stenosis.

He is a member of the American Heart Association/American Stroke Association, The Society of Critical Care Medicine, The Neurocritical Care Society, and The American Academy of Neurology. He has served as an ad hoc reviewer for the editorial board of the journal Stroke.

Thompson received his bachelor’s degree from the University of Rhode Island and his medical degree from Rush Medical College in Chicago. He completed his internship in internal medicine at Rush-Presbyterian-St. Luke’s Medical Center/Rush Medical College and his residency in neurology at Rhode Island Hospital/Brown Medical School, where he also served as chief resident.

He completed a fellowship in vascular and critical care neurology at Massachusetts General Hospital/Brigham and Women’s Hospital/Harvard Medical School and completed the program in clinical effectiveness at Harvard School of Public Health.

Interventional Neuroradiologist

Ali Saad, MD is a neurologist who specializes in vascular neurology. After obtaining his medical degree from Weill Cornell Medical College in Qatar, Dr. Saad completed his postgraduate training with a residency in neurology at the Weill Cornell Medical Center at New York Presbyterian Hospital and fellowship in vascular neurology at Emory University.

He is employed as a consulting neurologist at The Miriam Hospital and vascular neurologist at Rhode Island Hospital.

Dr. Saad is also an assistant professor at The Warren Alpert Medical School of Brown University. He serves as the assistant program director for the neurology residency and co-director of the Neurovascular Center Advanced Practice Provider Program.

N. Stevenson Potter, MD, PhD is a neurologist in the division of neurocritical care at Rhode Island Hospital and an assistant professor of neurology and neurosurgery at The Warren Alpert Medical School of Brown University where he co-directs the school’s course in neurology. He is board certified in neurology and neurocritical care.

His research interests include studying the collection of signals from implanted intracranial electrodes to help analyze interictal physiology and seizure origin, propagation and cessation in patients undergoing craniotomy for epilepsy surgery. Other interests include informatics in the setting of acute stroke and critical care, overcoming communication barriers among the critically ill and neurologically injured, and the collection of neurologic signals to assist in movement.

He is also currently involved in a number of clinical trials focusing on treatment and outcomes in acute stroke and intensive care unit patients.

He is a member of the American Heart Association/American Stroke Association, the Society of Critical Care Medicine, The Neurocritical Care Society and The American Academy of Neurology.

He graduated with honors from Harvard College and received his medical and graduate degrees (including a PhD in immunology) from Case Western Reserve University in Cleveland. He completed an internship in internal medicine at Metrohealth Medical Center and a residency in neurology at the Cleveland Clinic, followed by a fellowship in vascular and critical care neurology at Massachusetts General Hospital/Brigham and Women’s Hospital/Harvard Medical School.

Linda Wendell, MD is a neurologist in the division of neurocritical care at Rhode Island Hospital and an assistant professor of neurology and neurosurgery at The Warren Alpert Medical School of Brown University where she co-directs the psychiatry and clinical neurosciences clerkship. She is board certified in neurology and neurocritical care.

Her research interests include extubation outcomes in the setting of primary brain injury, prevention of ventilator and ICU-related infection, and acute stroke research.

Wendell graduated with honors from Rhodes College in Memphis and from the University of Tennessee School of Medicine, and completed her residency in neurology at Rhode Island Hospital/Alpert Medical School of Brown University, where she also served as chief resident in 2008, and a fellowship in neurocritical care at the University of Pennsylvania.

She is a member of the American Heart Association/American Stroke Association, The Society of Critical Care Medicine, The Neurocritical Care Society and the American Academy of Neurology.

Emergency Medicine Physician
Caryn Amedee, SCRN
Assistant Clinical Manager, Neurology/Stroke Program
Joan Walsh, CNRN, SCRN
Neuroscience Nursing Quality and Safety Manager
Jo-Ann Sarafin, SCRN
Stroke Program Manager
Naomi Thovmasian Marsh
Administrative Coordinator, Stroke Center