Coronary artery calcium score: has anything changed?

Area of Science:

• Cardiovascular Imaging
• Radiology
• Medical Diagnostics

Background:

• Coronary artery calcium deposition is a key indicator of atherosclerosis and coronary artery disease (CAD) severity.
• High coronary artery calcium score (CACS) is linked to advanced disease and increased likelihood of coronary stenoses.
• Historically, CACS assessment used electron beam computed tomography (EBCT), but multidetector CT (MDCT) has advanced noninvasive cardiac imaging.

Purpose of the Study:

• To review the evolution of CT technology in evaluating coronary arteries.
• To emphasize the importance of CT beyond CACS for plaque characterization.
• To enhance risk stratification for acute coronary events by assessing plaque composition.

Main Methods:

• Review of advancements in CT technology for cardiac and coronary artery imaging.
• Correlation studies of MDCT with intravascular ultrasound (IVUS) and histology for plaque characterization.
• Analysis of CT's role in identifying plaque features associated with rupture and acute coronary events.

Main Results:

• MDCT enables noninvasive characterization of atherosclerotic plaque, including low-density cores and superficial calcified nodules.
• CT findings can identify plaque morphology associated with higher risk of rupture and acute coronary events.
• The focus is shifting from solely CACS to comprehensive plaque analysis for improved patient risk stratification.

Conclusions:

• Modern CT imaging provides valuable insights into coronary artery disease beyond simple calcium scoring.
• Comprehensive CT assessment of plaque composition improves the identification of patients at high risk for acute coronary events.
• CT plays a vital role in refining CAD grading and patient risk stratification.