Heart & Cardiac Guides
Heart markers, lipids, inflammation, and cardiac risk testing.
What these guides cover
Cardiac guides cover lipids, inflammation markers such as hs-CRP, and other tests used to estimate heart health. They explain what each marker reflects, which are part of a standard lipid panel, and how results are discussed with a clinician.
Cardiac testing often starts with a lipid panel, which reports total cholesterol, LDL, HDL, and triglycerides. Beyond lipids, inflammation markers such as hs-CRP can be measured, and some panels include additional markers linked to heart muscle or clotting. Results are usually interpreted together with factors such as age, blood pressure, and smoking history. Fasting may be requested for a lipid panel, so check the preparation notes for your specific order.
How to use these guides
Each guide below focuses on a single test or a small group of related tests. Start with the marker you and your clinician have discussed, then follow the related-test links to see what is often ordered alongside it. Preparation and timing instructions appear in each guide, and where testing is available is listed by state and city. These guides are educational and do not replace advice from a healthcare provider.
Cholesterol Testing Explained: HDL, LDL, and Ratios
A clear guide to cholesterol testing, covering HDL, LDL, triglycerides, non-HDL cholesterol, and how to order a cholesterol blood test near
Heart Health Blood Tests: Cholesterol and Risk Markers
See which heart health blood tests are commonly used, from lipid panels to cardiac markers, and how to order cardiac screening at a lab near
Lipid Panel Blood Test Guide: What Your Numbers Mean
Learn what a lipid panel measures, how HDL, LDL, and triglycerides are reported, and how to order a cholesterol blood test without a referra
Heart & Cardiac FAQ
What does a standard lipid panel include?
A lipid panel typically reports total cholesterol, LDL cholesterol, HDL cholesterol, and triglycerides. These values are read together and alongside other risk factors rather than one at a time.
Does a cardiac test require fasting?
Many lipid panels ask for 8 to 12 hours of fasting, though this varies by laboratory and by the specific markers ordered. The preparation notes for your test will state what is required.
Can one marker show my heart health?
No single marker gives a complete picture. Cardiac risk is estimated from several values plus personal factors such as blood pressure and smoking history, which is why results are discussed with a clinician.
Reviewed by the LabDirectories Editorial Team
Our team researches and fact-checks all content to ensure accuracy. We update guides regularly to reflect current testing options, pricing, and laboratory accreditation standards.