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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...
Transducer Mechanism: Enzyme-Linked Receptors01:27

Transducer Mechanism: Enzyme-Linked Receptors

Enzyme-linked receptors are cell-surface receptors acting as an enzyme or associating with an enzyme intracellularly. They make excellent drug targets. Drugs can bind to the extracellular ligand-binding domain or directly affect their enzymatic domain and alter their activity.
Major types that are helpful drug targets include:
Botulism01:22

Botulism

Botulism is a life-threatening neuroparalytic condition caused by botulinum neurotoxin, which is produced by the bacterium Clostridium botulinum, a Gram-positive, spore-forming, obligate anaerobe.In adults, the toxin enters the body in different ways: in foodborne botulism, the preformed toxin is absorbed in the intestine. In wound botulism, spores grow in injured tissue and release the toxin into the blood. Infant botulism differs mechanistically from adult forms. In infants, botulism commonly...
Trophic Efficiency00:46

Trophic Efficiency

Trophic level transfer efficiency (TLTE) is a measure of the total energy transfer from one trophic level to the next. Due to extensive energy loss as metabolic heat, an average of only 10% of the original energy obtained is passed on to the next level. This pattern of energy loss severely limits the possible number of trophic levels in a food chain.

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Related Experiment Video

Updated: Jun 5, 2026

Using Extraordinary Optical Transmission to Quantify Cardiac Biomarkers in Human Serum
09:23

Using Extraordinary Optical Transmission to Quantify Cardiac Biomarkers in Human Serum

Published on: December 13, 2017

[Troponins can fool].

Angela Bento1, João Vasconcelos, Carlos Aguiar

  • 1Hospital Espírito Santo EPE - Evora, Portugal. angelapimentabento@sapo.pt

Revista Portuguesa De Cardiologia : Orgao Oficial Da Sociedade Portuguesa De Cardiologia = Portuguese Journal of Cardiology : an Official Journal of the Portuguese Society of Cardiology
|December 25, 2010
PubMed
Summary
This summary is machine-generated.

Cardiac troponin assays are vital for diagnosing myocardial injury. However, elevated troponin levels alone should not confirm myocardial infarction without considering clinical context, as false positives can occur.

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Detection of Toxin Translocation into the Host Cytosol by Surface Plasmon Resonance
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Detection of Toxin Translocation into the Host Cytosol by Surface Plasmon Resonance

Published on: January 3, 2012

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Last Updated: Jun 5, 2026

Using Extraordinary Optical Transmission to Quantify Cardiac Biomarkers in Human Serum
09:23

Using Extraordinary Optical Transmission to Quantify Cardiac Biomarkers in Human Serum

Published on: December 13, 2017

Detection of Toxin Translocation into the Host Cytosol by Surface Plasmon Resonance
10:41

Detection of Toxin Translocation into the Host Cytosol by Surface Plasmon Resonance

Published on: January 3, 2012

Area of Science:

  • Biochemistry
  • Cardiology
  • Clinical Diagnostics

Background:

  • Cardiac troponins are sensitive and specific biomarkers for myocardial damage.
  • A 2000 definition linked myocardial infarction (MI) to any myocardial necrosis detected by troponin.
  • Troponin assays are integral to modern cardiac injury diagnosis.

Observation:

  • Elevated troponin levels can indicate myocardial necrosis.
  • A patient's clinical presentation may not align with elevated troponin results.
  • Analytical interferences can lead to false positive troponin values.

Findings:

  • This case report highlights that troponin positivity is not always indicative of myocardial infarction.
  • Clinical correlation is essential when interpreting troponin results.
  • False positive troponin results can arise from various analytical interferences.

Implications:

  • Troponin results must be interpreted within the complete clinical context.
  • Relying solely on troponin levels for MI diagnosis can lead to misdiagnosis.
  • Further investigation is needed when clinical findings contradict troponin results.