Johns Hopkins Neurovascular Laboratory

The Johns Hopkins Neurovascular Laboratory offers comprehensive, coordinated cerebrovascular tests for patients with intracranial or extracranial vessel disorders such as brain aneurysm causing subarachnoid hemorrhage, and stroke.

These non-invasive ultrasound studies are performed by highly qualified and experienced technologists and interpreted by neurologists with special expertise in stroke and neurovascular ultrasound.

Testing is performed at The Johns Hopkins Hospital and Johns Hopkins Bayview Medical Center.

Why Choose Johns Hopkins

The Neurovascular Laboratory is equipped with state-of-the-art technology, including a portable MicroMaxx ultrasound system and Transcranial Doppler (TCD) scanners. Accredited by the Intersocietal Commission for the Accreditation of Vascular Laboratories (ICAVL), the Neurovascular Laboratory offers a range of procedures, including:

  • Transcranial Doppler
  • TCD-Bubble Test, PFO Detection
  • Carotid Doppler Ultrasound

Contact Us

For referrals or to learn more about the Neurovascular Laboratory, please call 410-955-7481.

Physicians and Staff

The laboratory is operated under the supervision of the Johns Hopkins Department of Anesthesiology and Critical Care Medicine and is staffed by registered vascular technologists.

  • Juan R Carhuapoma, M.D.

    • Associate Professor of Neurology
    • Associate Professor of Anesthesiology and Critical Care Medicine
    • Associate Professor of Neurosurgery
  • Romergryko Guance Geocadin, M.D.

    • Co-Director, Johns Hopkins Encephalitis Center
    • Professor of Neurology
    • Joint Appointment in Medicine
    • Professor of Anesthesiology and Critical Care Medicine
    • Professor of Neurosurgery
  • Marek Alexander Mirski, M.D., Ph.D.

    • Vice-Chair, Department of Anesthesiology and Critical Care Medicine
    • Director, Johns Hopkins Neuroscience Critical Care Units
    • Chief, Division of Neuroanesthesiology
    • Co-Director, Johns Hopkins Comprehensive Stroke Center
    • Director of Neuroanesthesia and Critical Care Medicine Division
    • Professor of Anesthesiology and Critical Care Medicine
    • Professor of Neurology
    • Professor of Neurosurgery
  • Paul Nyquist, M.D., M.P.H.

    • Co-Director, Johns Hopkins Bayview Neurocritical Care Unit
    • Professor of Neurology
    • Professor of Anesthesiology and Critical Care Medicine
    • Professor of Medicine
    • Professor of Neurosurgery
  • Robert Stevens, M.D.

    • Director, Division of Informatics, Integration, and Innovation
    • Director, Anesthesiology and Critical Care Medicine Precision Medicine
    • Associate Director, Precision Medicine Center of Excellence
    • Associate Professor of Anesthesiology and Critical Care Medicine
    • Assistant Professor of Neurosurgery
    • Associate Professor of Biomedical Engineering
    • Associate Professor of Neurology
    • Associate Professor of Radiology and Radiological Science
  • Wendy Ziai, M.D., M.P.H.

    • Medical Director, Neurovascular Laboratory
    • Co-Director, Johns Hopkins Bayview Neurocritical Care Unit
    • Professor of Neurology
    • Professor of Anesthesiology and Critical Care Medicine
    • Professor of Neurosurgery

Extended Staff

Nicole Yakas, MS, RVT

Technical Director of the Neurovascular

default doctor image

Vladamir Ponomarev, RDMS

TCD Technician

Ponomarev, Vladamir, RDMS