Cardio IQ® Advanced Lipid Panel

A standard cholesterol panel measures cargo, not vehicles. It tells you how much cholesterol is riding inside your blood's fat-carrying particles and says much less about how many particles there are. Those two signals often agree. When they don't, risk follows the particle count.

This panel measures both in one blood draw. It adds a particle count, an inherited risk marker you usually need to measure only once, and a size profile that helps show which metabolic problem is producing your particles.

What This Panel Reveals

Start with the count. Every particle that can lodge in an artery wall carries one copy of a structural protein called apolipoprotein B. ApoB is the short name. Count apoB and you have counted the artery-entering particles. When large cohorts put apoB, LDL cholesterol and triglycerides into the same model, apoB keeps predicting heart attacks and the others fade. In more than 200,000 UK Biobank adults, each standard step up in particle count came with about a third higher risk of coronary artery disease.

Then there is the part you inherited. Lipoprotein(a) is usually written Lp(a). It is an LDL-like particle with an extra protein wrapped around it. Your level is more than 90 percent set by your genes, stays roughly flat for life, and about one in five people carry enough of it to matter. Risk climbs steadily with the level, about 11 percent higher for every 50 nmol/L step up across nearly half a million adults. Diet barely moves it and statins do not lower it, which is why knowing the number changes what you do about everything else.

The rest of the panel describes what kind of particles you are making. When insulin stops working well, your liver exports more triglyceride-rich particles called very-low-density lipoproteins, or VLDL. Cholesterol then shifts between particles, and you can end up with more, smaller particles carrying the same total cholesterol. That pattern shows up here as a smaller peak size, a Pattern B label and a high small-particle count.

Read the size numbers as a description of that metabolism, not as extra risk stacked on top of apoB. In the same UK Biobank analysis, particle diameter and the size subclasses were no longer associated with coronary disease once total particle count was taken into account. Different labs also measure particles by different technologies, so trend size on the same platform and use it to identify which pattern is producing your particles.

How to Read Your Results Together

Four patterns cover most results.

One pattern deserves its own warning. Statins lower the cholesterol inside particles more than they lower the number of particles: in pooled treatment data, LDL cholesterol fell to roughly the 21st population percentile while apoB reached only about the 55th. Mismatch is therefore more common in people already on treatment. If you are on a statin and only LDL cholesterol is being checked, you may be looking at a good number while residual particle burden remains.

What to Do with Your Results

European guidelines use apoB goals that tighten as risk rises: under 80 mg/dL for people at high risk, under 65 mg/dL for very high risk. Those are policy lines drawn through a continuous curve. Risk rises smoothly across the whole range of particle counts, so an apoB near the population average is ordinary, not low. If you have plaque, diabetes or a strong family history, aim well below the line rather than at it.

For lipoprotein(a), the common rule-in level for high risk is 50 mg/dL or 125 nmol/L, though labs and guidelines do not convert the two units perfectly. One measurement in adulthood is enough unless you start a therapy aimed at lipoprotein(a) itself, or unless kidney, liver or thyroid disease or menopause changes the picture. Everything else is worth rechecking 4 to 12 weeks after a medication change and after a major lifestyle change, then every 6 to 12 months while you are actively managing risk.

Three companion tests make this panel more useful. High-sensitivity C-reactive protein is usually shown as hs-CRP. It checks whether the artery wall looks inflamed as well as exposed. A coronary calcium scan shows whether particles have already built plaque. HbA1c shows your average blood sugar over about three months, and fasting insulin can confirm the metabolic pattern when triglycerides and particle size point that way. If your lipoprotein(a) is very high, or heart attacks happened early in your family, a preventive cardiology or lipid clinic is worth the visit.

When Results Can Be Misleading

• Fasting status. ApoB, total cholesterol and lipoprotein(a) hold steady after a meal. Triglycerides do not, and they can distort calculated LDL and VLDL values, so fast 10 to 12 hours if you want the cleanest comparison.
• Switching labs. Particle counts measured by different technologies do not always classify the same sample the same way. Repeat on the same platform or you may be comparing two different rulers.
• High lipoprotein(a). Lipoprotein(a) carries cholesterol too, and some of that cholesterol is counted inside LDL cholesterol: about 3 percent of the LDL cholesterol value on average, and closer to 15 percent when lipoprotein(a) is high. That can make LDL cholesterol look worse than the modifiable part warrants.
• Recent illness or a medication change. Infection, injury and the first weeks after changing lipid medication can move results. Wait until you are back to baseline before drawing firm conclusions.