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AVM's Aneurysms Strokes


Arteriovenous Malformation Center at MGH/Harvard

AVM's by John R. Mangiardi, M.D. at


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An Aneurysm can best be likened unto a "Balloon" on a bicycle tire.  The above picture represents an arteriogram of the Vertebral Artery in the brain.  An arteriogram  (or Angiogram if smaller vessels are being studied.)  is made by injecting specific vessels with a "dye" which shows up in a series of X-rays.    In the MRI picture below, the same aneurysm was first discovered.

Learn more about aneurysms at the links below:

The Brain Aneurysm Foundation, Inc.
295 Cambridge Street 
Boston, Massachusetts 02114
phone: 617 723-3870
fax: 617 723-8672

Visit C.A.T.S.

Cerebral Aneurysm/Tumor Survivors

3D visualization of brain aneurysm

Aneurysm support group

Brain Aneurysm and AVM Center at MGH

Cerebral Aneurysm

Aneurysm Information Project


There are two basic types of strokes: "Wet" or hemorrhagic and "Dry" or non-hemorrhagic strokes. They are subcategorized as follows:

  1. Hemorrhagic ("a bleed")
    1. Hypertensive ( This is one of the most avoidable tragedies of High Blood Pressure!)
    2. Spontaneous (Other causes such as aneurysm, AVM's, amyloidal, bleeding from tumors, infections, trauma...)

  2. Non-Hemorrhagic (Results in dead areas of the brain from lack of oxygen.)
    1. Embolic
      1. Cardiac (from fibrillations, old myocardial infarcts, endocarditis...)
      2. Carotid Artery ( pieces of plaque of clots breaking off)
    2. Thrombosis (this usually occurs from clotting off from arteriosclerosis or "hardening of the arteries")

"Brain Attack"by John R. Mangiardi, M.D.

MGH Harvard Vascular Home Page

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