Angiography
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Cardiac Catheterization and Coronary Angiogram
The purpose of cardiac catheterization and angiogram is to find out if a person has disease in the coronary arteries (atherosclerosis). If the person has atherosclerosis, this test can pinpoint the size and location of fat and calcium deposits (plaque) that are narrowing the coronary arteries. Results from cardiac catheterization and angiogram help determine whether treatment with bypass surgery or percutaneous coronary intervention (PCI), such as angioplasty, may be effective.
During cardiac catheterization, a soft, thin tube (catheter) is put in a blood vessel in the arm or groin and gently moved into the heart. A special dye (contrast material) that shows up on X-rays is injected through the catheter. An X-ray picture on a computer screen shows the dye moving through the blood vessels and into the chambers of the heart. X-ray pictures of the dye can check for narrowing or blockage of the arteries.
Cardiac catheterization with coronary angiogram is a test to check the heart and coronary arteries. It is used to check blood flow in the coronary arteries, blood flow and blood pressure in the chambers of the heart, find out how well the heart valves work, and check for problems in how the wall of the heart moves.
The purpose of cardiac catheterization and angiogram is to find out if a person has disease in the coronary arteries (atherosclerosis). If the person has atherosclerosis, this test can pinpoint the size and location of fat and calcium deposits (plaque) that are narrowing the coronary arteries. Results from cardiac catheterization and angiogram help determine whether treatment with bypass surgery or percutaneous coronary intervention (PCI), such as angioplasty, may be effective.During cardiac catheterization, a soft, thin tube (catheter) is put in a blood vessel in the arm or groin and gently moved into the heart. A special dye (contrast material) that shows up on X-rays is injected through the catheter. An X-ray picture on a computer screen shows the dye moving through the blood vessels and into the chambers of the heart. X-ray pictures of the dye can check for narrowing or blockage of the arteries.
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Angiography or angeiography, was initially used as a portrayal of the weights and measures.
The X-ray film or image of the blood vessels is called an angiograph or an angiogram. The most common angiogram performed is to envisage the blood in the coronary arteries. Catheter, a long, thin, flexible tube is used to administer the radio contrast agent at the area to be visualized.
Angiography is also commonly performed to identify vessel narrowing in patients with diabetic retinopathy and macular degeneration.
Angiography is a sort of x-ray that is done to image blood vessels in diverse parts of the body, including the heart, brain and kidneys. This is done to determine whether the vessels are diseased, tapering, blocked or engorged.
The various types of angiography include:
· Peripheral angiography
· Cerebral angiography
· Pulmonary angiography
· Retinal angiography
· Coronary angiography
· Lymphangiography
· Visceral angiography
· Right heart ventriculography
· Left heart ventriculography
· Magnetic resonance angiography
· Aortography.
Coronary or cardiac angiography is an X-ray assessment of the blood vessels or chambers of the heart to identify obstruction leading to heart attack. A catheter is inserted into a blood vessel in the groin or arm, after the area is insensitised by an anesthetic.
The tip of the tube is positioned in the heart or at the beginning of the arteries, and a special fluid (called a contrast material or dye) is injected. The progress of the fluid is detectable by X-ray, and the pictures that are obtained are called angiograms. The dye highlights the obstruction in blood flow.
Avoid eating or drinking anything, 8 hours before the test commences. The physician should be informed if the individual is pregnant, allergic to seafood or on an aphrodisiac.
Magnetic resonance angiography (MRA) is used to identify diseases in the aorta and in blood vessels of the legs, kidneys and lungs. It is used in the treatment of heart disorders, stroke, and blood vessel diseases.
The procedure is painless. The magnetic field used for MRA will attract iron-containing object in the body, such as an intrauterine device, joint replacement, heart pacemaker, metal plate, or staples. All metallic accessories such as hair pins, dental work, jewellery should be removed.
The magnetic field causes no damage to the tissues. Magnetic resonance imaging (MRI) is a method wherein the electromagnetic energy is measured and analyzed by a computer, and meticulous pictures of body tissues and organs without x-rays are provided. The images are viewed on a TV monitor. MR angiography (MRA) is an MRI study of the blood vessels. No contrast material is utilized.
MRA is less costly than catheter angiography. Detailed images of blood vessels and blood flow are obtained without inserting a catheter, thereby preventing arterial damage.
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