Lab report names starting with H

Abbreviations

• H/S ratioCD4/CD8 RatioCD4 helper T cells divided by CD8 cytotoxic T cells. It shows how those two groups of T cells balance.
• H63DHFE H63DA DNA test for a common change in the HFE gene. On its own it rarely causes iron overload, but together with C282Y it can raise iron levels a little.
• HAPTHaptoglobinA protein made by the liver that binds free hemoglobin. A low level can be a clue that red blood cells are breaking down faster than normal.
• HaptoHaptoglobinA protein made by the liver that binds free hemoglobin. A low level can be a clue that red blood cells are breaking down faster than normal.
• HAV IgMHepatitis A antibody, IgMAn early antibody to the hepatitis A virus. A positive result can mean a current or recent hepatitis A infection.
• HAV totalHepatitis A antibody, totalMeasures all hepatitis A antibodies (IgG and IgM) together. A positive result usually means you are immune from a past infection or the vaccine.
• HbHemoglobinThe oxygen-carrying protein in your red blood cells. It is the main number used to check for anemia.
• Hb PatternHemoglobin Electrophoresis InterpretationA written summary of your hemoglobin test pattern that names the types of hemoglobin found, such as a normal pattern or a carrier state.
• HbA1cHemoglobin A1c (HbA1c)A1c shows your average blood sugar over about the past 2 to 3 months, based on how much glucose is stuck to your hemoglobin.
• HbA2Hemoglobin A2 (HbA2)The share of your hemoglobin that is the minor form HbA2. It helps clinicians sort out inherited hemoglobin conditions such as beta-thalassemia trait.
• HBc IgMHepatitis B Core Antibody, IgMA short-lived antibody that appears early in a new hepatitis B infection. A positive result is linked to infection within roughly the past six months.
• HBcAbHepatitis B Core Antibody, Total (Anti-HBc)An antibody your body makes after hepatitis B infection. A positive result is linked to past or current infection. The vaccine does not cause it.
• HbCOCarboxyhemoglobin (COHb)The share of your hemoglobin that is bound to carbon monoxide instead of oxygen. It shows recent carbon monoxide exposure, including from smoking.
• HBeAbHepatitis B e antibody (anti-HBe)An antibody to the hepatitis B e antigen. In someone with hepatitis B, a positive result is often linked to the virus being less active.
• HBeAgHepatitis B e antigen (HBeAg)A hepatitis B virus protein linked to active virus growth and higher infectiousness. It's usually checked only after a positive HBsAg.
• HbFHemoglobin F (Fetal Hemoglobin)The share of your hemoglobin that is the fetal type, HbF. It is high in newborns and falls to a very low level after the first two years.
• HbSHemoglobin S (HbS)How much of your hemoglobin is the sickle type, HbS. Most people have none. A result above zero needs the full hemoglobin report to interpret.
• HbS screenSickle Cell Screen (Hemoglobin S Solubility)A quick check for hemoglobin S, the type of hemoglobin linked to sickle cell trait and sickle cell disease. It can't tell the two apart.
• HBsAbHepatitis B Surface Antibody (Anti-HBs)The antibody that protects against hepatitis B. A result of 10 mIU/mL or higher is generally treated as protected, from vaccination or past infection.
• HBsAgHepatitis B Surface Antigen (HBsAg)A protein from the hepatitis B virus. A positive result is linked to the virus being in your blood now, from a recent infection or a long-term one.
• HBVHoney Bee Venom IgEMeasures IgE antibodies to honey bee venom, which helps clinicians work out whether a sting reaction may be linked to bee venom.
• HBV DNAHepatitis B Virus DNA (Quantitative)Measures how much hepatitis B virus DNA is in your blood. It helps show how active a long-term hepatitis B infection is.
• HBV VLHepatitis B Virus DNA (Quantitative)Measures how much hepatitis B virus DNA is in your blood. It helps show how active a long-term hepatitis B infection is.
• HCMMean Corpuscular Hemoglobin (MCH)How much hemoglobin, on average, each of your red blood cells carries.
• HCO3Bicarbonate (Total CO2)Bicarbonate, often printed as CO2 or total CO2, gives a clue about your body's acid-base balance. It is part of most routine blood panels.
• HCTHematocritThe share of your blood made up of red blood cells, shown as a percent. It usually moves together with hemoglobin.
• HCV AbHepatitis C AntibodyChecks for antibodies your immune system makes after hepatitis C exposure. A reactive result is followed by an RNA test to see if the virus is still there.
• HCV GTHepatitis C Virus GenotypeShows which type (genotype) of hepatitis C virus you have. It is usually done once and can help your clinician plan treatment.
• HCV RNAHepatitis C Virus RNA (Quantitative)Measures how much hepatitis C virus genetic material (RNA) is in your blood. It shows whether the virus is present now and how treatment is going.
• HCV VLHepatitis C Virus RNA (Quantitative)Measures how much hepatitis C virus genetic material (RNA) is in your blood. It shows whether the virus is present now and how treatment is going.
• HcyHomocysteineHomocysteine is an amino acid your body clears with B vitamins. Higher levels can reflect low B12 or folate, kidney function, age or genetics.
• HDLHDL CholesterolHDL cholesterol is the cholesterol carried in HDL particles. Low levels are linked to more heart risk, but very high levels aren't clearly protective.
• HDL-CHDL CholesterolHDL cholesterol is the cholesterol carried in HDL particles. Low levels are linked to more heart risk, but very high levels aren't clearly protective.
• HDL-PHDL Particle Number (HDL-P)The number of HDL particles in your blood, counted by NMR. It sits beside HDL cholesterol, which measures the cholesterol those particles carry.
• HEp-2 IIFA patternANA Pattern (ICAP)Describes how the antibodies in a positive ANA test look under a microscope, such as smooth, speckled or dotted. The pattern helps guide which tests come next.
• Hg/CrMercury/Creatinine Ratio, UrineMercury in a urine sample shown per gram of creatinine, so the result is not thrown off by how dilute your urine is.
• HgbHemoglobinThe oxygen-carrying protein in your red blood cells. It is the main number used to check for anemia.
• HGB A2Hemoglobin A2 (HbA2)The share of your hemoglobin that is the minor form HbA2. It helps clinicians sort out inherited hemoglobin conditions such as beta-thalassemia trait.
• HGB FHemoglobin F (Fetal Hemoglobin)The share of your hemoglobin that is the fetal type, HbF. It is high in newborns and falls to a very low level after the first two years.
• Hgb PatternHemoglobin Electrophoresis InterpretationA written summary of your hemoglobin test pattern that names the types of hemoglobin found, such as a normal pattern or a carrier state.
• HGB SHemoglobin S (HbS)How much of your hemoglobin is the sickle type, HbS. Most people have none. A result above zero needs the full hemoglobin report to interpret.
• Hgb S solubilitySickle Cell Screen (Hemoglobin S Solubility)A quick check for hemoglobin S, the type of hemoglobin linked to sickle cell trait and sickle cell disease. It can't tell the two apart.
• HgbA1cHemoglobin A1c (HbA1c)A1c shows your average blood sugar over about the past 2 to 3 months, based on how much glucose is stuck to your hemoglobin.
• hGHGrowth Hormone (GH)A hormone from the pituitary gland that drives growth in children and helps manage body composition in adults. It is released in bursts, so one level is hard to interpret.
• HIV Ag/AbHIV-1/2 Antigen/Antibody (4th Generation)A blood test that looks for HIV antibodies and a viral protein (p24), so it can find an infection earlier than tests that only look for antibodies.
• HIV ComboHIV-1/2 Antigen/Antibody (4th Generation)A blood test that looks for HIV antibodies and a viral protein (p24), so it can find an infection earlier than tests that only look for antibodies.
• HIV VLHIV-1 RNA (Quantitative Viral Load)Measures how much HIV-1 genetic material (RNA) is in a blood sample. It shows how well HIV treatment is working.
• HIV-1 RNAHIV-1 RNA (Quantitative Viral Load)Measures how much HIV-1 genetic material (RNA) is in a blood sample. It shows how well HIV treatment is working.
• HIV-1/2 Ag/AbHIV-1/2 Antigen/Antibody (4th Generation)A blood test that looks for HIV antibodies and a viral protein (p24), so it can find an infection earlier than tests that only look for antibodies.
• HoloTCActive Vitamin B12 (Holotranscobalamin)The part of your vitamin B12 that is attached to its carrier protein and ready for your cells to use. It's often called 'active B12'.
• HP IgGH. pylori Antibody, IgGA blood test for antibodies to H. pylori, a common stomach bacterium. A positive result can reflect a past infection, not only a current one.
• HpSAH. pylori Stool AntigenA stool test that looks for H. pylori proteins and shows an active infection. Recent antibiotics, acid reducers or bismuth can hide a true infection.
• HRP2Malaria Antigen (Rapid Test)A quick finger-prick or blood-draw test that looks for proteins from malaria parasites. In the US, a positive or negative result is followed up with a blood smear.
• hs-CRPC-Reactive Protein (CRP, incl. hs-CRP)A protein your liver makes when the body has inflammation. Standard CRP helps check for infection or injury, and hs-CRP is used in heart-risk checks.
• hs-cTnITroponin I (Cardiac, incl. High-Sensitivity)A protein released when heart muscle cells are damaged. Doctors use it to find out whether the heart muscle has been injured, most often when someone has chest pain.
• hs-cTnTTroponin T (Cardiac, incl. High-Sensitivity)A protein released when heart muscle cells are damaged. Doctors use it to find out whether the heart muscle has been injured, most often when someone has chest pain.
• hsTnITroponin I (Cardiac, incl. High-Sensitivity)A protein released when heart muscle cells are damaged. Doctors use it to find out whether the heart muscle has been injured, most often when someone has chest pain.
• hsTnTTroponin T (Cardiac, incl. High-Sensitivity)A protein released when heart muscle cells are damaged. Doctors use it to find out whether the heart muscle has been injured, most often when someone has chest pain.
• HSV-1 IgGHerpes Simplex Virus 1 IgG (Type-Specific)Looks for IgG antibodies to herpes simplex virus type 1 (HSV-1), the usual cause of cold sores. A positive result means you were infected at some point.
• HSV-2 IgGHerpes Simplex Virus 2 IgG (Type-Specific)Looks for IgG antibodies to herpes simplex virus type 2 (HSV-2), a common cause of genital herpes. A low positive result often needs a second test to confirm.
• hTSHTSH (Thyroid Stimulating Hormone)A hormone from the pituitary gland that tells your thyroid how much hormone to make. It is the test most often ordered first to check your thyroid.
• β-hCGhCG, Total, Quantitative (Beta-hCG)The pregnancy hormone, measured as a number. It rises quickly in early pregnancy, so a trend over days tells more than a single value.