What does high ldl cholesterol mean in a blood test

What does high ldl cholesterol mean in a blood test

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December 18, 2017 | by Alison Sage, D.O.

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What does high ldl cholesterol mean in a blood test

What, exactly, is the difference between HDL and LDL cholesterol (which one’s good)? And what are triglycerides?

Why should you care about how many white or red blood cells you have circulating?

Because your blood can tell you a lot about how healthy you are. There is so much information pumping through your veins. Doctors can see whether you’re diabetic, anemic or fighting an infection. They can gather clues to how well your liver, heart or thyroid is working.

Blood tests are often part of a routine check-up, as doctors analyze how your body is working. Unless you’re a medical professional, however, the results can be hard to decipher.
Let’s run down common lab tests. When you go to your primary care physician for a check-up, your doctor may want to do a blood draw to check your cholesterol, your blood count (how many red and white blood cells and platelets you have circulating), and a basic metabolic or chemistry panel.

  • Lipid panel = cholesterol. Your doctor will order a lipid panel to get a picture of your cholesterol. Cholesterol is broken up into “good” (HDL) and “bad” (LDL). When LDL or “bad” cholesterol builds up in your arteries it can slow your blood flow, potentially leading to a heart attack or stroke. High cholesterol has no symptoms, so the blood test is vital. Triglycerides are a type of fat in your blood that’s different from cholesterol. If your triglycerides are high, they could contribute to hardening of your arteries the way high LDL cholesterol can. You want your HDL cholesterol to be higher than 45 milligrams (mg) of cholesterol per deciliter (dL) of blood. You want your LDL to be less than 130 mg/dL. Triglycerides should be less than 150 mg/dL, and your total cholesterol shouldn’t break 200 mg/dL. As Mayo Clinic reports, if you’re at an average risk of developing heart disease, it’s a good idea to get your cholesterol checked every five years starting at age 18.
  • Complete blood count (CBC). This is a routine test to evaluate your general health. It can also detect a range of diseases, so doctors order this test to shed light on symptoms like fatigue or bruises. The CBC checks your levels of white blood cells, red blood cells and platelets. White blood cells help fight infection, so you’d have a higher number if that’s the case. A high or low number of red blood cells could indicate different diseases. Platelets, which help your blood clot, outside a normal range could also indicate disease.
  • Basic vs. complete/comprehensive metabolic panel. The basic metabolic panel tests your blood glucose (blood sugar), kidney function, and levels of calcium, sodium and potassium. The complete metabolic panel includes all those tests plus liver function tests. These tests could be ordered as part of a routine check-up or if your doctor wants to check for specific diseases.
  • Thyroid function. This test checks the level of thyroid stimulating hormone (TSH) in your blood. A high count could signify hypothyroidism; a low count, hyperthyroidism. Both conditions come with a host of symptoms, and this test can help your doctor rule out other diseases.

It’s important to find a physician you feel comfortable with and confident in, who partners with you in your personal health goals. Find the right Healthy Driven doctor for you.

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Cholesterol: The good and the bad

Two types of lipoproteins carry cholesterol to and from cells. One is low-density lipoprotein, or LDL. The other is high-density lipoprotein, or HDL. A test measures the amount of each type of cholesterol in your blood.

LDL (bad) cholesterol

LDL cholesterol is considered the “bad” cholesterol, because it contributes to fatty buildups in arteries (atherosclerosis). This narrows the arteries and increases the risk for heart attack, stroke and peripheral artery disease (PAD).

HDL (good) cholesterol

HDL cholesterol can be thought of as the “good” cholesterol because a healthy level may protect against heart attack and stroke. 

HDL carries LDL (bad) cholesterol away from the arteries and back to the liver, where the LDL is broken down and passed from the body. But HDL cholesterol doesn't completely eliminate LDL cholesterol. Only one-third to one-fourth of blood cholesterol is carried by HDL.

Triglycerides

Triglycerides are the most common type of fat in the body. They store excess energy from your diet.

A high triglyceride level combined with high LDL (bad) cholesterol or low HDL (good) cholesterol is linked with fatty buildups within the artery walls, which increases the risk of heart attack and stroke.

What does high ldl cholesterol mean in a blood test

Watch an animation about cholesterol.

Watch an animation about atherosclerosis.

Written by American Heart Association editorial staff and reviewed by science and medicine advisers. See our editorial policies and staff.

What should I do if my LDL is high?

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Quit smoking. ... .
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Drink alcohol only in moderation..

What is the main cause of high LDL?

Eating too much saturated fat or trans fats can result in unhealthy cholesterol levels. Saturated fats are found in fatty cuts of meat and full-fat dairy products. Trans fats are often found in packaged snacks or desserts.

What are the symptoms of high LDL cholesterol in the body?

High cholesterol typically doesn't cause any symptoms. In most cases, it only causes emergency events. For instance, a heart attack or stroke can result from the damage caused by high cholesterol. These events typically don't occur until high cholesterol leads to the formation of plaque in your arteries.

Should I be concerned if my LDL is high?

However, when your LDL level is high, it can start to form a plaque-like substance on the walls of your cardiovascular system, blocking the natural flow of blood and leaving you at severe risk for heart attack and stroke. Put simply, LDL is the bad kind of cholesterol.