Prognostic value of coronary computed tomography in patients with non-significant perfusion defects by myocardial...

Area of Science:

• Cardiology
• Diagnostic Imaging
• Preventive Cardiology

Background:

• Myocardial perfusion scintigraphy (MPS) is crucial for diagnosing coronary artery disease (CAD), but mild-moderate perfusion defects pose interpretation challenges.
• These ambiguities can lead to unnecessary cardiac catheterization, increasing patient risk and healthcare costs.
• Coronary computed tomography angiography (CCTA) offers high accuracy in CAD evaluation, yet its prognostic role in specific patient groups requires further definition.

Purpose of the Study:

• To evaluate the predictive capability of CCTA for major adverse cardiac events (MACE).
• To assess CCTA's utility in patients with suspected CAD and non-significant perfusion defects identified by MPS.
• To determine if CCTA can refine risk stratification in this patient cohort.

Main Methods:

• A cohort study involving 292 patients with non-significant MPS perfusion defects who underwent CCTA.
• Patients were followed for a mean of 34 months to track MACE.
• Multivariate Cox proportional hazards models and Kaplan-Meier survival analysis were employed.

Main Results:

• Hypertension and CCTA findings independently predicted MACE.
• Patients with significant coronary obstruction on CCTA exhibited a substantially higher risk of MACE (Hazard Ratio 15.3, P < 0.001).
• Kaplan-Meier analysis demonstrated CCTA's significant ability to predict MACE (log-rank P < 0.001).

Conclusions:

• CCTA possesses strong prognostic value for adverse events in patients with suspected CAD and mild-moderate perfusion defects.
• CCTA can serve as a valuable tool for risk stratification in this specific patient population.
• Utilizing CCTA may help optimize management decisions and avoid unnecessary invasive procedures.