Limitations of traditional risk scores. How to accurately estimate risk in younger patients.

In this compelling case study, Dr. Frank Corrigan, an Interventional Cardiologist with the Wellstar Health System, explores a clinical scenario that highlights the critical shortcomings of traditional cardiovascular risk calculators—especially when evaluating younger, symptomatic patients.

When “Low Risk” Is Misleading

Dr. Corrigan presents the case of a 50-year-old male who presented to the clinic with a primary complaint of exertional chest discomfort.

Based on traditional assessments, this patient would easily be dismissed as low risk¹:

• • Vitals & Labs: Mildly elevated blood pressure and slightly abnormal, but not alarming, cholesterol levels.
• • Traditional Risk Score: A PREVENT-ASCVD 10-year risk score of just 2.0%.
• • Calcium Score: 0 (Zero).

Relying solely on these traditional metrics might lead a clinician to believe the patient was at low risk for a cardiovascular event¹. However, because the patient was experiencing typical symptoms, further investigation was necessary.

Uncovering Hidden Disease with CCTA + Heartflow

To get a definitive look at the patient’s coronary anatomy, the team ordered a Coronary Computed Tomography Angiography (CCTA). The results were eye-opening.

Despite a zero calcium score and a 2% ASCVD risk, the CCTA revealed a critical, non-calcified lesion in the proximal LAD.

Further analysis using Heartflow AI-QCPA provided a comprehensive understanding of the disease burden:

• • Total Plaque Volume (TPV): 405 mm³ of total plaque.
• • Percentile: The patient fell into the 87th percentile for plaque volume based on his age and gender.
• • Functional Significance: Advanced analysis revealed a large pressure decline across the lesion, confirming its severity and the need for intervention.

A Successful Intervention

The patient underwent a successful percutaneous coronary intervention (PCI) with a stent placed in the proximal LAD. The actual sizing and location during the angiogram perfectly matched the CCTA predictions, and the patient went home the very same day, feeling significantly better.

Key Clinical Takeaways

Dr. Corrigan’s case study reinforces several vital lessons for modern cardiology:

1. Risk Factors vs. Actual Disease: Traditional risk scores (like PREVENT-ASCVD) only estimate the probability of an event based on population averages. They do not diagnose the actual presence of atherosclerosis in an individual patient.
2. The Danger of Non-Calcified Plaque: A calcium score of zero does not equate to zero disease. Younger patients can harbor severe, non-calcified plaques that standard calcium scoring will entirely miss.²
3. The Power of CCTA: Advanced imaging paired with comprehensive analysis tools allows clinicians to definitively identify what the patient has, enabling precise treatment planning.³
4. Guiding Long-Term Management: Knowing that a younger patient is developing premature atherosclerosis changes the trajectory of their care. It prompts a shift from standard preventative measures to aggressive, targeted medical management (such as driving LDL well below 55) to halt the atherogenic process.

Watch the full video to see the angiographic images, the Heartflow Analysis 3D models, and hear Dr. Corrigan’s complete clinical breakdown.

See CAD. Manage for life.