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Diagnostic Tests – Coronary Angiography (Cardiac Catheterization)
What Is Coronary Angiography / Cardiac Catheterization?
Coronary angiography—often performed as part of cardiac catheterization—is an invasive procedure in which a catheter is threaded through a large artery, typically the femoral or brachial artery, and advanced into the coronary vessels. Once in place, iodinated contrast dye is injected directly into the coronary arteries. X-ray fluoroscopy then captures dynamic images of blood flow, allowing clinicians to visualize the coronary anatomy in real time.
It is considered the gold standard for assessing coronary artery disease because it provides the most precise and direct evaluation of coronary lumen narrowing.
When Is Coronary Angiography the Correct Answer?
Angiography is indicated when a definitive understanding of coronary anatomy is needed, especially when noninvasive tests are abnormal or insufficient. It is the correct choice in the following scenarios:
What Does Coronary Angiography Show?
Coronary angiography provides direct visualization of the coronary arteries, allowing clinicians to determine:
What Is Coronary Angiography / Cardiac Catheterization?
Coronary angiography—often performed as part of cardiac catheterization—is an invasive procedure in which a catheter is threaded through a large artery, typically the femoral or brachial artery, and advanced into the coronary vessels. Once in place, iodinated contrast dye is injected directly into the coronary arteries. X-ray fluoroscopy then captures dynamic images of blood flow, allowing clinicians to visualize the coronary anatomy in real time.
It is considered the gold standard for assessing coronary artery disease because it provides the most precise and direct evaluation of coronary lumen narrowing.
When Is Coronary Angiography the Correct Answer?
Angiography is indicated when a definitive understanding of coronary anatomy is needed, especially when noninvasive tests are abnormal or insufficient. It is the correct choice in the following scenarios:
- After an abnormal cardiac stress test, to confirm the presence, severity, and location of coronary stenosis.
- Before coronary revascularization procedures, such as coronary artery bypass grafting (CABG) or percutaneous coronary intervention (PCI)/angioplasty.
- In the setting of acute coronary syndromes, particularly unstable angina, where urgent diagnostic clarification is needed to guide management and potential intervention.
What Does Coronary Angiography Show?
Coronary angiography provides direct visualization of the coronary arteries, allowing clinicians to determine:
- The degree of stenosis (narrowing) of each coronary vessel
- The number of vessels involved
- The precise anatomic location of blockages
- Whether stenoses are severe enough to be considered clinically significant
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