A high calcium score means you have a real amount of calcified plaque in your heart arteries, and your chance of a heart attack or stroke over the coming years is higher than average. It is not an emergency if you feel well. The plaque took years to form, and the score does not mean an artery is about to close.
What it does mean is that the plan changes. Prevention moves from optional to important, and the usual next step is a careful look at everything that drives plaque, followed by treatment of what is found.
Key takeaways
- A high calcium score means real calcified plaque and higher-than-average risk, but it is not an emergency if you feel well.
- Chest symptoms, new breathlessness or unexplained sweating and nausea need prompt evaluation whatever the score.
- The usual next steps are a talk about cholesterol-lowering treatment and a close look at ApoB, Lp(a), blood pressure, blood sugar and lifestyle.
- A high score in someone who feels well does not automatically mean a procedure, and repeat scans usually add little.
- Treatment does not lower the score, and statins tend to raise it, so a rising score is not proof of failure.
What scores of 100, 300 and 1,000 mean
There is no sharp line where risk begins. In the MESA study, which followed more than 6,800 adults for over a decade, risk rose steadily with the score, and each doubling of the score added about 14% to the risk of a heart attack or stroke.1 Still, three levels are commonly used.
| Score | What studies show | What it usually changes |
|---|---|---|
| 100 or more | Ten-year risk of heart attack or stroke above 7.5% in every age, sex and ethnic group studied | Guidance favors cholesterol-lowering treatment |
| Above 300 | Ten-year event rates of about 13% to 26%, depending on age, sex and background | A stronger case for treatment and closer follow-up |
| 1,000 or more | Event rates similar to people who already have diagnosed heart disease | Researchers argue for prevention as intensive as in known heart disease |
The 100 mark matters because US cholesterol guidance treats it as a point where the case for a statin becomes clear in someone whose risk was otherwise uncertain.2 The same guidance applies if your score is at or above the 75th percentile for your age and sex, even when it is below 100. Our guide to calcium score by age explains percentiles.
Scores of 1,000 or more are uncommon. In MESA, 257 of 6,814 participants had one. Compared with people who scored zero, they had close to five times the risk of a cardiovascular event, and their risk was about 65% higher than people who scored 400 to 999.3
Why it is not an emergency, and when it is
A calcium scan counts calcified plaque. It does not show whether any artery is narrowed enough to limit blood flow, and it was designed for people without symptoms. A high number in someone who feels well is a long-term warning, not a sign of a heart attack in progress.
Symptoms change everything. Chest pressure or pain, pain spreading to the arm, jaw or back, shortness of breath that is new or comes on with effort, or unexplained sweating and nausea need prompt medical evaluation whatever your score is. If symptoms are severe or do not settle, call 911. Do not wait for a prevention appointment.
The usual next steps
Most of the work after a high score is about treating the causes of plaque. That normally includes:
- A conversation about cholesterol-lowering treatment. In a study of more than 13,000 people who had a calcium scan, statin use was linked to fewer heart attacks, strokes and cardiovascular deaths in those with calcium, and the benefit grew with the score.4
- A fuller look at cholesterol particles. ApoB counts the particles that carry cholesterol into the artery wall. Lp(a) is measured once, because it is inherited and changes little.
- Blood pressure, measured properly and more than once.
- Blood sugar and insulin resistance, using glucose, A1c and fasting insulin.
- Tobacco, weight, sleep, activity and diet, which all change the pace of plaque growth.
Do you need more tests or a repeat scan?
Sometimes, and that is a decision for a clinician who knows your full picture. A stress test, a CT angiogram or a cardiology referral may be suggested if you have symptoms, if the score is very high, or if something else in your history raises concern. A high score by itself in a person who feels well does not automatically lead to a procedure.
The two kinds of test answer different questions. Our comparison of a calcium score and a stress test explains why one cannot stand in for the other.
As for repeating the calcium scan, there is usually little to gain. A German study that scanned more than 3,200 adults twice, about five years apart, found that the change between scans added only weakly to risk prediction. What counted was the most recent score and the current risk factors. The authors concluded a repeat scan had limited value in people already at high risk.5
Why the score does not go down with treatment
This surprises many people. Calcium that has formed in an artery wall does not dissolve, and good treatment does not lower the score. In fact, statins tend to raise it.
An analysis of eight trials that used ultrasound inside the coronary arteries found that high-intensity statin treatment shrank plaque volume while increasing its calcium content.6 The researchers suggested this is part of how statins stabilize plaque. A rising score on treatment is therefore not proof that treatment is failing.
Progress is measured in other ways: ApoB and LDL cholesterol, blood pressure, blood sugar, weight, smoking status, and how you feel. Nobody can promise that treatment will prevent a heart attack. What treatment does is lower the odds.
How Cardio Res-Q fits after a high score
Cardio Res-Q is a prevention program, not emergency care and not a replacement for a cardiologist. If your score is high and you want the causes examined in depth, the Comprehensive Assessment ($775) covers Dr. Varano's clinical evaluation and advanced labs including ApoB, Lp(a), hs-CRP, homocysteine, insulin, glucose and A1c, and ends with a personalized heart protection plan. The Enhanced Assessment ($999) adds a calcium score and CIMT ultrasound for people who have not been scanned.
If you already have a calcium score from elsewhere, bring it. The clinic accepts outside calcium scores, and everyone still starts with a first-time assessment. You keep your own cardiologist or primary care doctor, and we share results with them. Read Cardio Res-Q vs. a cardiologist visit to see how the two work together, or visit the Cardio Res-Q program page to book.
Are You a Candidate for Cardio Res-Q?
Three quick questions about the risk factors we screen for. Your answers stay between you and the clinic.
Frequently asked questions
Is a calcium score over 400 dangerous?
It signals a large plaque burden and a clearly raised risk of heart attack and stroke over the next ten years, so it deserves treatment and follow-up. It is not an emergency in someone without symptoms, and it does not tell you that an artery is blocked.
Can I lower my calcium score?
No. Diet, exercise and medication can lower your risk, but they do not reduce the score, and statins often raise it as plaque becomes more calcified. The goal is fewer events, not a smaller number.
Do I need a stent or an angiogram with a high score?
Not on the basis of the score alone. Procedures are considered when there are symptoms or when further testing shows that blood flow is restricted. Your clinician decides whether more testing is needed.
Should I see a cardiologist?
It is reasonable with a very high score, with any symptoms, or if you and your doctor are unsure how to proceed. Many people with moderately raised scores are managed well in primary care or a prevention program, with a cardiologist involved as needed.
Related reading
This article is for general education and is not medical advice. Decisions about testing and medication should be made with your clinician. If you have chest pain or other symptoms of a heart attack, call 911.
