What We Do

The Non-Invasive Diagnostic Vascular Lab provides non-invasive diagnostic ultrasound tests on arteries and veins, which our doctors use to confirm a diagnosis and determine a course of treatment. These tests may also be used to track disease progression over time.

There are generally two kinds of arterial vascular disease: occlusive and aneurysmal. In the occlusive form, blood flow is reduced because of plaque that has formed in the arteries. This causes reduced blood flow to tissues beyond the blockage. In aneurysmal disease, the wall of an artery weakens, which allows it to become larger and rupture is a possibility.

We also consult and manage the venous disease, thoracic outlet syndrome and AV malformations.

What Makes Us Special

The Non-Invasive Diagnostic Vascular Lab at Toronto General Hospital is an Intersocietal Accreditation Commission Vascular Testing (ICAVL) accredited laboratory. We provide excellent quality care using state-of-the-art equipment.

Our staff has extensive experience with advanced non-invasive vascular evaluation in patients with highly complex vascular diseases. We provide a clinical teaching environment to national and international vascular residents.​

 Materials and Resources to Help You

The Patient & Family Education Program at UHN offers valuable resources to help you understand your condition.


Improving Treatment for Aneurysms

Watch these videos to find out how we're building a better endograft to improve the treatment for patients with abdominal aortic aneurysms. Each video shows a different treatment option.

Resources from the Patient & Family Education Program

More information on cardiac and heart health:

Visit our Health Information section to find dedicated resources to help you understand your condition. Find the information you're looking for.​​

 Your Procedure

Someone will call you to give you a time for your appointment at the Non-Invasive Diagnostic Vascular Lab.

What to Bring

  • A trusted friend or family member
    A friend or family member can help you to answer our questions, gather information, take notes and ask questions.
  • Questions to ask
    Bring a list of questions to your appointment to help you remember everything you want to ask.

When You Arrive

The first person you meet at the Non-Invasive Diagnostic Vascular Lab is the receptionist. To sign in with the receptionist you will need your health card (OHIP card). If you do not have an OHIP card, please bring another form of government-issued photo ID (such as a driver's license, passport, or other provincial health card).

How Long Will Your Appointment Be?

First appointments take longer than follow-up appointments.

The average Non-Invasive Diagnostic Vascular Lab appointment can take 60 minutes per test required. If you are scheduled to be seen in the clinic after your Lab appointment you will proceed to Vascular Clinic otherwise you will be informed that you may leave.

We do everything that we can to stay on time. Unfortunately, your appointment may be delayed by unforeseen circumstances. We recommend that you come prepared for delays.

Before You Leave

At the end of your first appointment, the doctor will review your test. The results will be mailed to the referring physician. The referring physician will determine the next step in treatment and notify you appropriately.

If you are unsure about what your next steps are, don't be afraid to ask a member of your team. We are here to help you.

About Phone Calls

The Vascular Lab Secretary will call you the day before your scheduled visit to remind you of your appointment. If you have changed your phone number please ensure you notify us so we can update our records.

If you are unable to keep your scheduled appointment please contact the Non-Invasive Diagnostic Vascular Lab Secretary at 416 340 3589 as early as possible. If you do not have an answering machine for us to leave a message – you may need to call us.​

 Meet Our Team

Medical Director:

Dr. Kenneth Wayne Johnston
Phone: 416 340 3552

Nurse Manager

Milijana Buzanin

Staff Physicians or Specialists

Dr. J. Jaskolka
Phone: 416 340 2769

Dr. Thomas Lindsay
Phone: 416 340 4620

Vascular Technologists

Vascular Technologists are medical professionals that collaborate with physicians to diagnose blood vessel problems in patients using colour doppler ultrasound.​

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