angiogram
Meaning of angiogram: The picture shows the space inside a vessel rather than its wall, so it maps the channel that blood actually has left to travel through.
Definition of angiogram
An angiogram is an image of blood vessels made visible by contrast dye, and the word also names the procedure that produces it. Vessels do not register on an ordinary x-ray, so dye that absorbs the beam strongly is introduced into the bloodstream to outline the channel. The result shows narrowing, blockage, aneurysm and abnormal connections between vessels.
How angiogram is built
- angi/o Combining form · Greek vessel
- -gram Suffix · Greek the record or image produced
A medical term is read from its ending backwards: the suffix first, then the prefix, then the root. See all 223 word parts.
What are the different approaches?
| Approach | How it works | Trade-off |
|---|---|---|
| Catheter angiography | A fine tube is threaded to the vessel and dye injected there | Sharpest detail, and treatment can follow immediately; invasive |
| CT angiography | Dye into an arm vein, then a rapid scan timed to its arrival | Quick and widely available; uses radiation |
| MR angiography | Magnetic resonance, with or without contrast | No radiation; slower and less detailed for small vessels |
How is a catheter angiogram performed?
A needle enters an artery at the wrist or groin, a guidewire passes through it and a catheter is advanced along the vessel under live x-ray until its tip sits at the target. Dye injected there fills the blood vessel ahead of it for a few seconds. Digital subtraction removes the bone and soft tissue from the image so the vessels stand out alone. Because the catheter is already in position, an intervention can follow in the same sitting: inflating a balloon to open a narrowing, leaving a stent to hold it open, plugging a bleeding vessel, or pulling out a clot causing a stroke.
What are the considerations?
Iodine-based contrast can impair kidney function in people whose kidneys are already struggling, so function is checked beforehand and fluids given around the study. Reactions to contrast range from mild flushing and itching to rare severe allergy. Catheter access carries a small risk of bruising, vessel injury or dislodging debris that travels downstream. Balanced against this, an angiogram answers questions no other test can: whether a narrowing is tight enough to matter, exactly where a bleeding point sits, and whether a blocked artery can be reopened.
Also known as
Used in a sentence
A coronary angiogram was performed to evaluate the extent of blockage in the heart's blood vessels.
Good to know
An angiogram specifically visualizes the inside of blood vessels using injected contrast dye, which distinguishes it from imaging methods that show the surrounding organs and tissue without direct vessel visualization.
Word origin
Where “angiogram” comes from
Formed from Greek angeion, meaning vessel, and gramma, meaning something written or recorded, describing an image of the blood vessels.