Coronary Calcium Score: Now What Do I Do?
You got a number that scared you more than any lab result ever has. Here's what it actually means — and what to do next.
| Author | Bishnu Subedi, MD, FACC |
| Category | Health / Preventive Cardiology |
| Read time | ~4 minutes |
| One-line takeaway | A calcium score is information, not a verdict — and there's a clear next step for every range. |
The Big Idea
Your Coronary Artery Calcium (CAC) score measures hardened plaque in your heart's arteries, not whether you're blocked or in danger today. Written by a board-certified cardiologist, this book turns one confusing number into a clear, evidence-based action plan — covering medications, diet, exercise, and the hidden factors (like vitamin D or thyroid disease) that can skew your score.
Key Takeaways
| Concept | What It Means | Apply It This Week |
| The Agatston Score | The raw number (0 to 1,000+) quantifying calcified plaque in your arteries. | Find your score's age/sex percentile, not just the raw number. |
| Power of Zero | A score of 0 predicts very low near-term risk — but isn't a lifetime guarantee. | If your score is 0, ask your doctor when to rescan (usually 5–10 years). |
| Score ≠ Blockage | CAC shows plaque presence, not whether an artery is actually narrowed. | Don't request a stent or bypass based on CAC alone — ask what test would actually confirm blockage. |
| Statin Threshold | Guidelines favor statin therapy once CAC is above 0, and strongly above 100. | Bring your exact score and LDL number to your next appointment. |
| Non-Calcified Plaque | Soft, unstable plaque doesn't show up on a CAC scan — even at a score of 0. | Keep tracking LDL/apoB and lifestyle habits even with a reassuring score. |
The Framework, Visually
| 0 Very Low |
1–99 Mild |
100–399 Moderate |
400+ Severe |
| Lifestyle only; rescan in 5–10 yrs | Statin discussion; tighten diet + exercise | Statin + risk-factor control; cardiology follow-up | Aggressive lipid-lowering; treat like existing heart disease |
Do This Today
- Write down your exact score and its age/sex percentile — not just "high" or "low."
- Ask your doctor directly: "Based on my score, should I be on a statin?"
- Get an LDL/apoB check if you haven't had one in the last year.
- Book a follow-up scan date now (5–10 years out if your score is 0, sooner if elevated).
- Skip the stent conversation unless a separate test has shown an actual blockage.
"A calcium score is useful, actionable information — not a verdict."
— Bishnu Subedi, MD, FACC
Go Watch
The Agatston Score → linked to: "Mayo Clinic Minute: How a coronary calcium scan assesses heart attack risk" (Mayo Clinic)
Power of Zero → linked to: "Power of Zero: Coronary Artery Calcium Journey — Screening Test to Decision Tool" (Dr. Khurram Nasir, HMH Grand Rounds)
Score ≠ Blockage → linked to: "Coronary Artery Calcium Score (CAC) — Can It Predict A Heart Attack?" (Talking with Docs)
Get the Book
If you've ever stared at your own calcium score wondering what to do next, this is the book to hand your future self — 21 chapters of straight answers, myth-busting tables, and questions to bring to your own cardiologist.
Go Deeper
- American College of Cardiology (CardioSmart): Coronary Artery Calcium Scoring
- Cleveland Clinic: Calcium Score Test Explained
- Harvard Health: My Calcium Score Is Over 2,000 — What's Next?
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