Prognostic durability of coronary computed tomography angiography

Area of Science:

• Cardiovascular Imaging
• Preventive Cardiology
• Clinical Prognostics

Background:

• Coronary computed tomographic angiography (CCTA) offers diagnostic and prognostic insights into coronary artery disease (CAD).
• Limited data exists on the long-term prognostic implications of CCTA in large, prospective cohorts with suspected CAD.

Purpose of the Study:

• To validate the sustained incremental prognostic value of CCTA over an extended follow-up period.
• To assess the long-term outcomes associated with varying degrees of coronary atherosclerosis identified by CCTA.

Main Methods:

• A prospective cohort study enrolled 8667 patients undergoing CCTA for suspected CAD.
• Patients were followed for a mean of 7.0 years for major adverse events (MAE) and major adverse cardiac events (MACE).
• CCTA was analyzed for CAD severity, total plaque score (TPS), and left ventricular ejection fraction.

Main Results:

• Patients without coronary atherosclerosis on CCTA exhibited very low annual MAE (0.45%) and MACE (0.19%) rates.
• Both MAE and MACE rates increased significantly with escalating CAD severity and total plaque score (TPS).
• High-risk CAD patients showed annual MAE and MACE rates of 3.52% and 2.58%, respectively; a TPS threshold of ≥5 was associated with higher MACE in non-obstructive CAD.

Conclusions:

• CCTA possesses independent and durable incremental prognostic value for cardiovascular events.
• The absence of coronary atherosclerosis on CCTA predicts an excellent long-term prognosis.
• Increasing non-obstructive plaque burden, particularly a TPS ≥5, identifies patients who may benefit from statin therapy.