Angiography
Angiography
Angiography (pronounced: an-gee-OG-rah-fee) is a medical imaging technique used to visualize the inside, or lumen, of blood vessels and organs of the body, with particular interest in the arteries, veins, and the heart chambers. This is traditionally done by injecting a radio-opaque contrast agent into the blood vessel and imaging using X-ray based techniques such as fluoroscopy.
Etymology
The term "Angiography" is derived from the Greek words Angio- meaning "vessel", and graphy meaning "to write or record".
Procedure
The procedure involves the introduction of a catheter into a large blood vessel, typically the femoral artery. The catheter is then maneuvered through the vascular system to the area of interest, such as the coronary arteries. Once the catheter is in place, contrast medium is injected and images are captured using a device such as a CT scanner or an MRI machine.
Types of Angiography
There are several types of angiography, which include:
- Coronary Angiography: This is a procedure that uses contrast dye, usually containing iodine, and X-ray pictures to detect blockages in the coronary arteries that are caused by plaque buildup.
- Cerebral Angiography: This procedure is used to visualize the blood vessels in and around the brain, typically in patients with stroke or similar symptoms.
- Pulmonary Angiography: This is a procedure used to see the blood vessels in the lungs. It is most commonly used to diagnose or rule out pulmonary embolism.
- Digital Subtraction Angiography (DSA): This is a type of fluoroscopy technique used in interventional radiology to clearly visualize blood vessels in a bony or dense soft tissue environment.
Related Terms
External links
- Medical encyclopedia article on Angiography
- Wikipedia's article - Angiography
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