Calcium Scans for Women: Will the Result Change Your Care?

Would the result change your care?

Before you schedule a calcium scan, ask: ‘What would we do differently with the result?’

This test can sometimes help you and your clinician decide whether to start cholesterol medicine or do more to lower cholesterol. Not every woman needs it. The result is most useful when there is a decision it could help you make.

Current guidance includes certain women age 45 or older who have no known disease in the heart’s arteries. Your clinician first looks at your health history and estimates your chance of a heart attack or stroke over the next ten years. If that estimate leaves the decision about medicine unclear, a scan may help. Turning 45 alone is not a reason to have one.

A calcium scan is not an emergency test. New chest pain or another urgent symptom needs prompt medical care, even if an earlier calcium score was zero.

What does the scan look for?

A coronary calcium scan uses X-rays to take detailed pictures of the arteries that supply your heart. It usually does not need an injection of dye. You may also hear it called a coronary artery calcium scan, or CAC scan.

The scan looks for calcium in plaque. Plaque is a buildup of cholesterol, fat and other substances in artery walls. Some plaque contains calcium; some does not. This scan detects the calcium-containing kind.

The score describes how much calcium the scan finds. Your report may call it an Agatston score. In large studies, people with higher scores had a higher average chance of future heart and blood-vessel problems. The score cannot predict exactly what will happen to you.

It also cannot show how well your heart pumps or tell you whether a narrowing is blocking blood flow.

What do the numbers mean?

A calcium score is not the percentage of an artery that is blocked. A score of 100 does not mean an artery is 100% blocked.

A score of 0 means no plaque containing calcium was seen. A score from 1 to 99 means some was seen. A score of 100 or more usually makes a stronger case for cholesterol medicine. Higher scores mean the scan found more calcium in plaque.

Your clinician reads the score alongside your age, blood pressure, cholesterol, other health conditions, family history and symptoms. Your report may also compare your score with people of a similar age, sex and race or ethnicity. That comparison is called a percentile.

A high score does not automatically mean you need a procedure to open an artery or more heart tests. Review the result with your clinician before starting aspirin, changing cholesterol medicine or arranging another test.

Does zero mean my heart is healthy?

Zero can be reassuring when the test is used to help decide on care for someone without symptoms. It means no calcium-containing plaque was found. It does not mean zero heart risk.

The scan can miss plaque that has not developed calcium. This matters especially in younger adults. It also does not rule out problems with the heart’s small blood vessels, rhythm or valves, or temporary tightening of an artery.

A zero score cannot explain every cause of chest discomfort or shortness of breath. Tell your clinician about new, changing or continuing symptoms. They need their own evaluation.

When might the scan help me decide?

Suppose you and your clinician are unsure whether to start cholesterol medicine. For some people in this situation, a score of zero may support waiting. A score above zero can strengthen the case for treatment.

But zero does not settle the decision for everyone. Medicine may still be recommended if you have inherited or very high cholesterol, diabetes after age 40, smoke cigarettes, or have a strong family history of an early heart attack or stroke.

If you and your clinician decide to wait on medicine after a zero score, ask when to review the plan. For selected people, guidance suggests considering another scan in three to seven years. Your history helps determine whether you need one and when.

A scan may add little if your treatment plan is already clear, your risk is very low, or you already have disease in the heart’s arteries. Symptoms may call for a different kind of evaluation.

What are the downsides?

The scan uses a low dose of radiation. The amount varies. Tell your healthcare team if you are pregnant or could be pregnant before having the test.

A scan can also find something unexpected that leads to more tests or appointments. Ask how those findings would be handled and whether the likely benefit of the scan outweighs its downsides for you.

Check the cost and your insurance coverage before scheduling. You may have to pay for some or all of the test yourself.

What should I ask at my next visit?

Bring your current and older test results, medicines and family history. Mention pregnancy complications, when menopause began, symptoms, and changes in what you can comfortably do. These details can help your clinician understand what the score would mean for you.

The goal is to leave with a plan you understand: whether the scan would help, what happens after the result, and when you will review it together.