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Related Concept Videos

Blood Studies for Cardiovascular System I: Cardiac Biomarkers01:20

Blood Studies for Cardiovascular System I: Cardiac Biomarkers

Cardiac biomarkers are enzymes, proteins, and hormones released into the blood when cardiac cells are injured. They are powerful tools for triaging.
The essential diagnostic tools for detecting myocardial necrosis and monitoring individuals suspected of having acute coronary syndrome (ACS) include:
Troponins
Troponins, particularly cardiac troponins I and T, are the most precise and sensitive markers of myocardial injury. They are detectable within 4-6 hours of myocardial injury and remain...
Blood Studies for Cardiovascular System II: CRP, Hcy, and Cardiac Natriuretic Peptide Markers01:19

Blood Studies for Cardiovascular System II: CRP, Hcy, and Cardiac Natriuretic Peptide Markers

Cardiac biomarkers are critical in diagnosing, prognosing, and managing cardiovascular diseases. Routine measurement of specific biomarkers such as B-type natriuretic peptide (BNP), C-reactive protein (CRP), and homocysteine (Hcy) is common practice in clinical settings to evaluate heart function and predict cardiovascular events.
These markers indicate stress or strain on the heart muscle:
Natriuretic Peptides (BNP)
Cardiac myocytes produce these hormones in response to ventricular stretching...
Enzyme-linked Receptors01:00

Enzyme-linked Receptors

Enzyme-linked receptors are proteins that act as both receptor and enzyme, activating multiple intracellular signals. This is a large group of receptors that include the receptor tyrosine kinase (RTK) family. Many growth factors and hormones bind to and activate the RTKs.
Neurotrophin (NT) receptors are a family of RTKs, including trkA, trkB, and trkC (tropomyosin-related kinase) receptors. TrkA is specific for nerve growth factor (NGF), neurotrophin-6, and neurotrophin-7. TrkB binds...
Enzyme-Linked Immunosorbent Assay01:33

Enzyme-Linked Immunosorbent Assay

In 1971, Peter Perlman and Eva Engvall developed an Enzyme-linked immunosorbent assay (ELISA or EIA). ELISA differs from western blot in that the assays are conducted in microtiter plates or in vivo rather than on an absorbent membrane.
There are many different types of ELISAs, but they all involve an antibody molecule whose constant region binds an enzyme, leaving the variable region free to bind its specific antigen.  Enzyme-substrate reaction allows the antigen to be visualized or quantified.
Enzyme Kinetics01:19

Enzyme Kinetics

Enzymes speed up reactions by lowering the activation energy of the reactants. The speed at which the enzyme turns reactants into products is called the rate of reaction. Several factors impact the rate of reaction, including the number of available reactants. Enzyme kinetics is the study of how an enzyme changes the rate of a reaction.
Scientists typically study enzyme kinetics with a fixed amount of enzyme in the controlled environment of a test tube. When more reactant, or substrate, is...

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Related Experiment Video

Updated: Jun 28, 2026

Ecotoxicological Methodologies to Evaluate Biomarkers at Different Scales in Neotropical Anurans
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[Enzymatic biomarkers].

Gabriela Cortés Villarreal1

  • 1Instituto Nacional de Cardiología "Ignacio Chávez", INCICH, Juan Badiano Núm 1, Col Sección XVI, Tlalpan 14080, México, DF. gabycov@yahoo.com.mx

Archivos De Cardiologia De Mexico
|October 22, 2008
PubMed
Summary

New blood tests for non-ST-elevation myocardial infarction (NSTEMI) aid diagnosis and risk assessment. Rapid results from these seric markers improve patient outcomes by enabling quicker treatment decisions.

Area of Science:

  • Cardiology
  • Biochemistry

Context:

  • Emergency room consultations for suspected myocardial infarction without ST-segment elevation (NSTEMI) are increasing.
  • Diagnostic methodologies for NSTEMI require efficient and accurate tools.

Purpose:

  • To highlight the importance of seric markers in diagnosing NSTEMI.
  • To introduce novel inflammatory markers for cardiovascular risk stratification in NSTEMI patients.

Summary:

  • Seric markers, including isoenzymes and novel inflammatory markers, are crucial for diagnosing NSTEMI.
  • These markers, obtained from blood samples, provide qualitative and quantitative data within 10-15 minutes.
  • This rapid diagnostic capability aids in stratifying cardiovascular risk and guiding treatment.

Impact:

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  • Accelerated therapeutic interventions for NSTEMI patients.
  • Reduced patient damage through timely and precise diagnosis.
  • Improved patient management and outcomes in emergency cardiac care.